Humidification platform for use with a portable CPAP device

Abstract

A humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising a base and a humidification chamber. The base comprises a device compartment configured to at least partially removably receive an RPT device configured to supply the pressurised flow of breathable gas. The base further comprises a humidification compartment in fluid connection with the device compartment. The humidification chamber is configured for containing a supply of water and is at least partially removably received within the humidification compartment such that, in an operational configuration, the humidification chamber is arranged to receive the pressurised flow of breathable gas and output the pressurised flow of breathable gas with increased humidity. The base further comprises a heater secured to the humidification chamber. The heater is configured to heat the supply of water.

Description

[0001] 1 CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to U.S. Provisional Application No. 63 / 075,375, filed September 8, 2020, the entire contents of which are incorporated herein by reference. 2 BACKGROUND 2.1 TECHNICAL FIELD

[0005] The present technology relates to one or more of the screening, diagnosis, monitoring, treatment, prevention and amelioration of a respiratory-related disorder. The present technology also relates to medical devices or apparatus, and their use.

[0006] 2.2 DESCRIPTION OF RELATED ART

[0007] 2.2.1 The Human Respiratory System and Related Disorders

[0008] The respiratory system of the body facilitates gas exchange. The nose and mouth form the entrance to the airways of the lung.

[0009] The airways include a sequence of branching tubes when the branching airways penetrate deeper into the lung, they become narrower, shorter, and more numerous. The main function of the lung is gas exchange, allowing oxygen to enter the venous blood from inhaled air and carbon dioxide to leave the blood in the opposite direction. The trachea divides into the left and right main bronchus, which ultimately subdivide into end- bronchioles. The bronchi constitute the conducting airways and do not participate in gas exchange. Further branching of the airways leads to the respiratory bronchioles and ultimately the pulmonary alveolar region. The pulmonary alveolar region of the lung is where gas exchange occurs and is known as the respiratory zone. See West, John B. Respiratory Physiology, 9thedition, Lippincott Williams & Wilkins, 2012.

[0010] There is a range of disorders of the respiratory system. Certain disorders can be characterised by particular events, such as apneas, hypopneas, and hyperpneas.

[0011] Examples of respiratory disorders include obstructive sleep apnea (OSA), Cheyne-Stokes Respiration (CSR), respiratory insufficiency, Obesity Hypoventilation Syndrome (OHS), Chronic Obstructive Pulmonary Disease (COPD), Neuromuscular Disease (NMD), and Chest Wall Disorder.

[0012] Obstructive Sleep Apnea (OSA) is a form of Sleep Disordered Breathing (SDB) characterised by events including occlusion or obstruction of the upper airway during sleep. It results from the combination of an abnormally small upper airway and normal loss of muscle tone in the region of the tongue, soft palate and posterior oropharyngeal wall during sleep. The condition causes the affected patient to stop breathing for periods of time, typically between 30 seconds and 120 seconds, sometimes 200 to 300 times per night. It often leads to excessive daytime sleepiness and can cause cardiovascular disorders and brain damage. The condition is a common disorder, particularly in middle aged overweight males, although a person affected can have no awareness of the problem. See US Patent No. 4,944,310 (Sullivan).

[0013] Respiratory failure is an overarching term for respiratory disorders in which the lungs cannot take in sufficient oxygen or expel sufficient CO2 to meet the needs of the patient. Respiratory failure can encompass some or all of the following disorders.

[0014] A patient with respiratory insufficiency, a form of respiratory failure, can experience abnormally short breaths when exercising.

[0015] A range of therapies have been used to treat or alleviate such conditions. In addition, otherwise healthy individuals can utilise these therapies to prevent the onset of respiratory disorders. However, these therapies have a number of shortcomings.

[0016] 2.2.2 Treatment

[0017] A variety of respiratory therapies, such as Continuous Positive Airway Pressure (CPAP) therapy, Non-Invasive ventilation (NIV), Invasive ventilation (IV) and High Flow Therapy (HFT) have been used to treat one or more of the above respiratory disorders.

[0018] 2.2.2.1 Respiratory Pressure Therapy

[0019] Respiratory Pressure Therapy is the supply of air to the entrance of the airways at a controlled target pressure that is nominally positive with respect to atmosphere throughout the patient’s respiratory cycle (as opposed to negative pressure therapies such as tank ventilators or cuirass ventilators).

[0020] Continuous Positive Airway Pressure (CPAP) has been used to treat Obstructive Sleep Apnea (OSA). The mechanism of action is that continuous positive airway pressure acts as a pneumatic splint and can prevent upper airway occlusion, such as by pushing the soft palate and tongue forward and away from the posterior oropharyngeal wall. Treatment of OSA by CPAP therapy can be voluntary, so patients can choose not to comply with the therapy if they find the device used to provide it: uncomfortable, difficult to use, expensive and unattractive.

[0021] 2.2.2.2 Flow Therapy

[0022] Not all respiratory therapies aim to deliver a prescribed therapy pressure. Some respiratory therapies aim to deliver a prescribed respiratory volume by delivering an inspiratory flow curve over a target duration, possibly superimposed on a positive baseline pressure. In other cases, the interface to the patient's airways is "open" (unsealed) and the respiratory therapy can supplement the patient's own spontaneous breathing with a flow of conditioned or enriched gas. In one example, high flow therapy (HFT) is the provision of a continuous, heated, humidified flow of air at a "treatment flow rate" that is approximately constant throughout the respiratory cycle to an entrance to the airways via an unsealed or "open" patient interface. The treatment flow rate is nominally set to exceed the peak inspiratory flow rate of the patient. HFT has been used to treat OSA, CSR, respiratory failure, COPD, and other respiratory disorders. One mechanism of action is that the high flow of air at the entrance to the airways improves ventilation efficiency by flushing or washing out exhaled C02 from the patient's anatomic dead space. HFT is therefore sometimes referred to as deadspace therapy (DST). Other benefits can include elevated warmth and humidification (possibly beneficial in secretion management) and the potential to elevate airway pressures appropriately. As an alternative to a constant flow, the treatment flow rate can follow a profile that varies over the respiratory cycle.

[0023] Another form of flow therapy is long-term oxygen therapy (LTOT) or supplemental oxygen therapy. A physician can prescribe a continuous flow of oxygen enriched air to be delivered to the patient's airways at a specified flow rate (e.g., 1 liter per minute (LPM), 2 LPM, 3 LPM, etc.), a specified oxygen concentration (fraction of oxygen in ambient air, from 21% to 100%).

[0024] 2.2.2.3 Supplemental oxygen

[0025] For certain patients, oxygen therapy can be combined with respiratory pressure therapy or HFT by adding supplemental oxygen to the pressurized air flow. When oxygen is added to respiratory pressure therapy, this is referred to as RPT with supplemental oxygen. When oxygen is added to HFT, the resulting therapy is referred to as HFT with supplemental oxygen.

[0026] 2.2.3 Respiratory therapy system

[0027] These respiratory therapies can be provided by a respiratory therapy system or device. Such systems and devices can also be used to screen for, diagnose, or monitor a condition without treating it.

[0028] A respiratory therapy system can include a respiratory pressure therapy device (RPT device), an air circuit, a humidifier, a patient interface, an oxygen source, and data management.

[0029] 2.2.3.1 Patient interface

[0030] A patient interface can be used to interface a respiratory treatment device to its wearer, such as by providing a flow of air to the entrance of the airways. The flow of air can be provided via a mask to the nose and / or mouth of a patient, via a tube to the mouth, or via a tracheal tube to the trachea of a patient. Depending on the therapy to be applied, the patient interface can form a seal (e.g., a hermetic seal) with the area of the patient’s face so as to facilitate the delivery of gas at positive pressures of up to 10 cmH20 in sufficient variation from ambient pressure to effect therapy. For other forms of therapy, such as oxygen delivery, the patient interface can not include a seal sufficient to facilitate delivery to the entrance of the airways of a supply of gas at positive pressures of up to 10 cmH20. For flow therapies such as nasal HFT, the patient interface is configured to insufflate the nares, but specifically to avoid a full seal. One example of such a patient interface is a nasal cannula.

[0031] 2.2.3.1.1 Seal-forming structure

[0032] A patient interface can include a seal-forming structure. The shape and configuration of the seal-forming structure, due to its direct contact with the patient’s face, can directly impact the effectiveness and comfort of the patient interface.

[0033] A patient interface is characterized, in part, by the design intent of the seal-forming structure in engaging with the face when in use. In one form of patient interface, the seal-forming structure can include a first sub-portion forming a seal around a left naris and a second sub-portion forming a seal around a right naris. In one form of patient interface, the seal-forming structure can include a single element that surrounds both nares when in use. Such a single element can be designed to cover, for example, the upper lip region and the bridge of the nose region of the face. In one form of patient interface, the seal-forming structure can include an element that surrounds a mouth region when in use, for example, by forming a seal over the lower lip region of the face. In one form of patient interface, the seal-forming structure can include a single element that surrounds both nares and the mouth region when in use. These different types of patient interfaces can be given various names by their manufacturers, including nasal masks, full-face masks, nasal pillows, nasal puffs, and mouth-nose masks.

[0034] A seal-forming structure that can be effective in one region of a patient’s face can not be suitable in another region, for example, because of the different shape, structure, variability, and sensitive areas of a patient’s face. For example, a seal on a swimming goggle that covers a patient’s forehead can not be suitable for use on a patient’s nose.

[0035] 2.2.3.1.2 Positioning and stabilisation

[0036] The seal-forming structure of a patient interface for positive air pressure therapy is subject to a corresponding force of the air pressure to break the seal. Accordingly, various techniques have been used to position the seal-forming structure, and to maintain it in a sealing relationship with the appropriate portion of the face.

[0037] 2.2.3.2 Respiratory pressure therapy (RPT) devices

[0038] Respiratory pressure therapy (RPT) devices can be used alone or can be used as part of a system to provide one or more of a number of therapies described above, such as by operating the device to generate a flow of air for delivery to an interface to the airways. The flow of air can be pressure-controlled (for respiratory pressure therapy) or flow-controlled (for flow therapy such as HFT). Thus, RPT devices can also be used as flow therapy devices. Examples of RPT devices include CPAP devices and ventilators.

[0039] Air pressure generators are known in the range of applications such as industrial scale ventilation systems. However, air pressure generators for medical applications have specific requirements not met by more general air pressure generators, such as reliability, size and weight requirements of medical devices. Furthermore, even devices designed for medical use can have shortcomings with respect to one or more of: comfort, noise, ease of use, efficacy, size, weight, manufacturability, cost and reliability.

[0040] One example of a specific requirement for certain RPT devices is noise.

[0041] Noise output level table for existing RPT devices (only one sample, measured at 10 cmH20 using test methods specified in ISO 3744 in CPAP mode).

[0042] RPT device name A-weighted sound pressure level dB(A) Year (approx.) C Series Tango TM ]]> 31.9 2007 C Series Tango with humidifier TM ]] 33.1 2007 [SCAT S8 Escape TM II]] 30.5 2005 H4i with band TM S8 Escape of humidifier TM II]] 31.1 2005 [S9 AutoSet TM ]]> 26.5 2010 S9 AutoSet with H5i humidifier TM ]] 28.6 2010

[0043] One known RPT device for treating sleep disordered breathing is the S9 Sleep Therapy System, manufactured by ResMed Limited. Another example of an RPT device is a ventilator. Ventilators such as the ResMed Stellar™ Series of Adult and Paediatric Ventilators can support a range of patients for invasive and non-invasive non-dependent ventilation for the treatment of a number of conditions such as, but not limited to, NMD, OHS and COPD. TM

[0044] ResMed Elisée 150 Ventilator TM ResMed VS III TM ​Ventilators can provide support for both traumatic and non-traumatic, dependent ventilation of adults or paediatric patients for the treatment of a variety of conditions. These ventilators provide volume and pressure ventilation modes with single limb or dual limb circuits. RPT devices generally comprise a pressure generator such as a motor-driven blower or compressed gas reservoir, and are configured to supply a flow of air to the airway of a patient. In some cases, the flow of air can be supplied to the airway of a patient at positive pressure. The outlet of the RPT device is connected via an air circuit to a patient interface such as those described above.

[0045] The designer of the device can be presented with an infinite number of choices to make. Design criteria often conflict, meaning that some design choices are far from routine or inevitable. Furthermore, comfort and efficacy in some areas can be highly sensitive to small and subtle changes in one or more parameters.

[0046] 2.2.3.3 Air circuit

[0047] An air circuit is a conduit or tube constructed and arranged to allow a flow of air to travel between two components of a respiratory therapy system, such as an RPT device and a patient interface, in use. In some cases, there can be separate limbs of the air circuit for inhalation and exhalation. In other cases, a single limb air circuit is used for inhalation and exhalation.

[0048] 2.2.3.4 Humidifier

[0049] Delivering a flow of air without humidification can result in drying of the airway. The use of a humidifier with an RPT device and a patient interface produces humidified gas that minimizes drying of the nasal mucosa and increases patient airway comfort. Furthermore, in cooler climates, warm air is generally more comfortable to apply into and around the facial area of the patient interface than cold air.

[0050] A range of artificial humidification devices and systems are known, however they can not meet the specialised requirements of a medical humidifier.

[0051] Medical humidifiers are used to increase the humidity and / or temperature of the flow of air relative to ambient air when required, typically where the patient can be asleep or resting, for example in a hospital. Medical humidifiers for bedside placement can be small. A medical humidifier can be configured to humidify and / or heat only the flow of air delivered to the patient, without humidifying and / or heating the patient's surroundings. Room-based systems, for example a sauna, an air conditioner or an evaporative cooler, for example, can also humidify air breathed by a patient, however these systems also humidify and / or heat the entire room, which can cause discomfort to the occupants. Furthermore, medical humidifiers can have more stringent safety limitations than industrial humidifiers.

[0052] While a number of medical humidifiers are known, they can have one or more shortcomings. Some medical humidifiers can provide insufficient humidification, some can be difficult or inconvenient for a patient to use.

[0053] 2.2.3.5 Data management

[0054] There can be a number of clinical reasons to obtain data that determines whether a patient prescribed treatment with respiratory therapy is "compliant", e.g. that the patient has used their RPT device according to one or more "compliance rules". One example of a compliance rule for CPAP therapy is that a patient is required to use the RPT device for at least four hours each night for at least 21 or 30 consecutive days in order to be considered compliant. In order to determine the compliance of a patient, a provider of the RPT device, such as a health care provider, can manually obtain data describing the patient's therapy with the RPT device, calculate the usage over a predetermined time period and compare to the compliance rules. Once the health care provider has determined that the patient has used their RPT device according to the compliance rules, the health care provider can inform a third party that the patient is compliant.

[0055] There are other aspects of patient therapy that can benefit from communication of therapy data to a third party or external system.

[0056] Existing methods of communicating and managing such data can be one or more of: expensive, time consuming and error prone.

[0057] 2.2.3.6 Vent technology

[0058] Some forms of therapy system can include a vent to allow flushing of exhaled carbon dioxide. The vent can allow gas to flow from an internal space of the patient interface, e.g. a plenum chamber, to an external space of the patient interface, e.g. to ambient.

[0059] 2.2.4 Screening, diagnosis and monitoring systems

[0060] Polysomnography (PSG) is a conventional system for diagnosing and monitoring cardiorespiratory conditions, and typically involves a specialist clinical staff applying the system. PSG typically involves placing 15 to 20 contact sensors on a patient to record various body signals such as electroencephalography (EEG), electrocardiography (ECG), electrooculography (EOG), electromyography (EMG), etc. PSG for sleep disordered breathing involves observing a patient for two nights in a clinic, one night purely for diagnosis and a second night for the clinician to titrate therapy parameters. PSG is therefore expensive and inconvenient. In particular, it is not suitable for home screening / diagnosis / monitoring of sleep disordered breathing.

[0061] Screening and diagnosis generally describe the identification of a condition from signs and symptoms of the condition. Screening generally gives a true / false result indicating whether the patient's SDB is severe enough to warrant further investigation, whereas diagnosis can produce clinically actionable information. Screening and diagnosis tend to be one-off processes, whereas monitoring the progression of the condition can continue indefinitely. Some screening / diagnosis systems are suitable only for screening / diagnosis, whereas some can also be used for monitoring.

[0062] A clinical specialist can be able to adequately screen, diagnose or monitor a patient from visual observation of PSG signals. However, there are situations where a clinical specialist can not be available or a clinical specialist can not be affordable. Different clinical specialists can disagree on the patient's condition. In addition, a given clinical specialist can apply different criteria at different times. 3SUMMARY

[0064] The technology is directed towards providing medical devices for screening, diagnosing, monitoring, ameliorating, treating or preventing respiratory disorders, with one or more of improved comfort, cost, efficacy, ease of use, and manufacturability.

[0065] One form of the technology includes a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient.

[0066] One form of the technology includes a humidifier including a chamber and a tub removably positioned within the chamber.

[0067] One form of the technology includes a humidifier base configured to detachably support a humidifier reservoir and / or a chamber of an RPT device.

[0068] One form of the technology includes a humidifier including a tub including a heating element for heating an internal cavity of the tub.

[0069] One form of the technology includes a humidifier including a reservoir configured to be inserted into and / or removed from the base with a single hand.

[0070] One form of the technology includes a humidifier base having a device compartment for detachably receiving an RPT device and a humidification compartment for detachably receiving a reservoir.

[0071] Another aspect of one form of the technology is that the RPT device is configured to be at least partially exposed when fully inserted into the device compartment, and the reservoir is configured to be at least partially exposed when fully inserted into the humidification compartment.

[0072] Another aspect of one form of the technology is that the reservoir includes a cap configured to be exposed when the reservoir is fully inserted into the humidification compartment. A patient is able to refill the reservoir when the reservoir is fully inserted into the humidification compartment.

[0073] Another form of the technology comprises a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0074] a base; and

[0075] a tub configured to contain a supply of water, the tub being removably coupled to the base.

[0076] Another form of the technology comprises a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0077] a tub configured to contain a supply of water, the tub being configured to receive the pressurised flow of breathable gas and output the pressurised flow of breathable gas with increased humidity.

[0078] Another form of the technology comprises a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0079] a base comprising:

[0080] a device compartment configured to removably receive an RPT device, the RPT device being configured to supply the pressurised flow of breathable gas, and

[0081] a humidification compartment spaced apart from and fluidly connected to the device compartment; and

[0082] a tub configured to contain a supply of water, the tub being configured to receive the pressurised flow of breathable gas and output the pressurised flow of breathable gas with increased humidity, the tub comprising:

[0083] a tub base comprising a cavity configured to contain the supply of water;

[0084] a heater secured to the tub base and configured to heat the supply of water; and

[0085] a tub lid removably coupled to the tub base and configured to selectively cover an opening to the cavity, wherein the tub base, the heater and the tub lid are removably positionable as a unit within the humidification compartment.

[0086] Another form of the technology comprises a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0087] a base comprising:

[0088] a device compartment configured to at least partially removably receive an RPT device, the RPT device being configured to supply the pressurised flow of breathable gas, and

[0089] a humidification compartment connected to the device compartment; and

[0090] a humidification bucket configured to hold a supply of water and at least partially removably received in the humidification compartment, such that in an operational configuration, the humidification bucket is arranged to receive the pressurized flow of breathable gas and output the pressurized flow of breathable gas having increased humidity.

[0091] a heater secured to the humidification bucket and configured to heat the supply of water.

[0092] In certain examples: a) the humidification bucket is arranged to engage and disengage from the base along a substantially vertical direction along a humidification bucket insertion axis; b) the humidification bucket comprises a bucket base arranged to be at least partially removably received in the humidification compartment; b) the bucket base comprises a cavity configured to hold a supply of water; c) the humidification bucket comprises a bucket lid removably coupled to the bucket base; and / or d) the heater is attached to the bucket base.

[0093] In certain examples: a) the heater is overmolded to an inside of the bucket base; b) the bucket base comprises an electrical connector connected to the heater. The electrical connector in the bucket base is configured to electrically connect with an electrical connector disposed within the humidification compartment; and / or c) the bucket lid is detachably coupled to the bucket base and is configured to be single-handedly operated.

[0094] In certain examples: a) the bucket lid further comprises a water inlet that allows the bucket base to be filled with water; b) a cap is detachably coupled to the bucket lid to selectively cover the water inlet; c) the humidification bucket is only partially received in the humidification compartment such that the humidification bucket extends beyond a space defined by the humidification compartment; d) at least the bucket lid is exposed to the ambient environment and is not covered by the base in use; and / or e) the cap is removable while the bucket base is at least partially positioned within the humidification compartment.

[0095] In certain examples: a) the bucket lid comprises a shroud configured to be housed within the cavity when the bucket lid is coupled to the bucket base; b) the shroud is spaced apart from the water inlet; and / or c) the shroud is oriented in a negative dome shape relative to the water inlet.

[0096] In certain examples: a) an outlet configured to deliver the pressurized flow of breathable gas to the patient, the outlet being spaced apart from the device compartment and from the humidification compartment; b) a first fluid conduit extending between the device compartment and the humidification compartment, the first fluid conduit being configured to deliver pressurized breathable gas from the device compartment to the humidification compartment; c) a second fluid conduit extending between the humidification compartment and the outlet, the second fluid conduit being configured to deliver pressurized breathable gas from the humidification compartment to the outlet; d) the humidification compartment includes a third fluid conduit in communication with the first fluid conduit and / or the second fluid conduit; and / or e) the outlet is tubular and defines an axis, the axis being oriented in a direction that is substantially perpendicular to the humidification bucket insertion axis.

[0097] In certain examples: a) the bucket base includes a bucket base opening configured to allow a pressurized flow of breathable gas to flow into and / or out of the cavity; b) the bucket base opening includes a passage configured to receive the third fluid conduit in the operational configuration such that the passage and the third fluid conduit are coaxial; c) the shroud is positioned adjacent to an opening of the third fluid conduit when the bucket cover is coupled to the bucket base in the operational configuration; d) at least one of the passageway and the third conduit includes a frustoconical shape; e) in the operational configuration, the third fluid conduit extends over the passageway; f) the third fluid conduit includes a partition that separates the third fluid conduit into an inlet portion and an outlet portion, the partition being configured to at least partially isolate the inlet portion from the outlet portion; g) the shroud and the third fluid conduit are configured such that the shroud prevents water from entering the inlet portion and the outlet portion when water is poured into the cavity through the water inlet when the humidification bucket is in its operational configuration inside the humidification compartment; h) the pressurized flow of breathable gas is configured to enter the cavity through the inlet portion and the pressurized flow of breathable gas is configured to exit the cavity through the outlet portion; i) the partition is configured to extend over the passageway of the bucket base opening; j) an outer surface adjacent to the opening of the third fluid conduit includes a sealing member configured to engage an inner surface of the passage of the bucket base opening, the sealing member being configured to prevent the flow of pressurized breathable gas between the passage and the third fluid conduit; and / or k) the sealing member is a silicone lip seal or an O-ring.

[0098] In certain examples: a) the base includes a humidification compartment retention feature arranged within the compartment; b) the tub includes a humidification reservoir retention feature located at the tub base outside the cavity and configured to reversibly engage the humidification compartment retention feature; c) the humidification tub is configured to be guided into and / or held in the operational configuration by suitable engagement between the humidification compartment retention feature and the humidification reservoir retention feature; d) the humidification compartment retention feature and the humidification reservoir retention feature are magnets having opposite polarities; e) each of the humidification compartment retention feature and the humidification reservoir retention feature includes one or more magnets, the arrangement being such that electromagnetic forces between magnets of respective polarities only allow engagement in the operational configuration; and / or f) the humidification tub is configured to engage with the humidification compartment by a magnetic connection and at least one additional connection selected from the group consisting of a mechanical connection, an electrical connection, and a pneumatic connection, wherein the magnetic connection and the additional connection are configured to be implemented simultaneously.

[0099] In certain examples: a) the RPT device is configured to be inserted into the device compartment along an RPT insertion axis, and the humidification tub is configured to be inserted into the humidification compartment along a reservoir insertion axis parallel to the RPT insertion axis; b) the outlet is oriented in a direction substantially perpendicular to the RPT insertion axis and the second insertion axis; c) the device compartment is configured to receive only a portion of an engaged RPT device; and / or d) the RPT device is at least partially exposed when the RPT device is fully located in the device compartment.

[0100] In certain examples: a medical device comprising: a humidifier; an RPT device configured to supply a pressurized flow of breathable gas, the RPT device being removably positionable within a device compartment of the humidifier; a patient interface configured to seal a face of the patient and to deliver the pressurized flow of breathable gas having increased humidity to an airway of the patient; and a conduit arranged to fluidly connect the humidifier outlet to the patient interface for delivery of the pressurized flow of breathable gas from the humidifier to the patient interface; b) at least a portion of the RPT device is exposed and configured to be gripped by the patient when fully inserted into the device compartment; and / or c) at least a portion of the humidification tub is exposed and configured to be gripped by the patient when fully inserted into the humidification compartment.

[0101] Another form of the technology includes a humidifier for humidifying a pressurized flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0102] a base comprising:

[0103] a device compartment,

[0104] a humidification compartment spaced apart from the device compartment,

[0105] an outlet spaced apart from the device compartment and from the humidification compartment,

[0106] a first fluid conduit extending between the device compartment and the humidification compartment, the first fluid conduit configured to convey pressurised breathable gas from the device compartment to the humidification compartment, and

[0107] a second fluid conduit extending between the humidification compartment and the outlet, the second fluid conduit configured to convey pressurised breathable gas from the humidification compartment to the outlet; and

[0108] a bucket configured to hold a supply of water, the bucket configured to receive a flow of pressurised breathable gas passing through the first fluid conduit and output a flow of pressurised breathable gas having increased humidity passing through the second fluid conduit, the bucket comprising:

[0109] a bucket base comprising a cavity configured to hold the supply of water, and

[0110] a bucket lid configured to selectively cover an opening to the cavity;

[0111] wherein the device compartment is configured to removably receive an RPT device configured to supply the flow of pressurised breathable gas; and

[0112] wherein the bucket is removably positionable within the humidification compartment.

[0113] Another form of the technology includes a humidifier for humidifying a flow of pressurised breathable gas to be delivered to a patient, the humidifier comprising:

[0114] a base comprising:

[0115] a base chassis having a bottom surface and at least one vertical sidewall extending upwardly from the bottom surface, the bottom surface and the at least vertical sidewall at least partially forming a compartment,

[0116] a compartment inlet configured to deliver the flow of pressurised breathable gas into the compartment, and

[0117] a humidification compartment retention feature arranged within the compartment; and

[0118] a bucket configured to hold a supply of water, the bucket removably positionable within the compartment, the bucket configured to receive the flow of pressurised breathable gas from the compartment inlet and output a flow of pressurised breathable gas having increased humidity, the bucket comprising:

[0119] a bucket base comprising a cavity configured to hold the supply of water,

[0120] a humidification reservoir retention feature coupled to the tub base externally of the cavity and configured to removably engage with the humidification compartment retention feature, and

[0121] a tub lid removably coupled to the tub base and configured to selectively cover an opening to the cavity;

[0122] wherein the tub is configured to be guided into an engaged position by proper engagement between the humidification compartment retention feature and the humidification reservoir retention feature.

[0123] Another form of the technology includes a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0124] a base comprising:

[0125] a base base having a bottom surface and at least one vertical sidewall extending upwardly from the bottom surface, the bottom surface and the at least vertical sidewall at least partially forming a compartment, and

[0126] a compartment inlet configured to deliver the pressurised flow of breathable gas into the compartment, and

[0127] a tub configured to hold a supply of water, the tub being removably positionable within the compartment, the tub being configured to receive the pressurised flow of breathable gas from the compartment inlet and output a pressurised flow of breathable gas having increased humidity, the tub comprising:

[0128] a tub base comprising a cavity configured for holding the supply of water,

[0129] a tub lid removably coupled to the tub base and configured to selectively cover an opening to the cavity, the tub lid comprising a water inlet passage, and

[0130] a cap removably coupled to the tub lid to selectively cover the water inlet passage;

[0131] wherein the tub lid is exposed to the ambient environment in use and is not covered by the housing.

[0132] wherein the cap is removable while the tub base is positioned within the compartment.

[0133] Another form of the technology includes a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0134] a base comprising:

[0135] a device compartment configured to removably receive an RPT device, the RPT device being configured to supply the pressurised flow of breathable gas, and

[0136] a humidification compartment spaced apart from the device compartment and fluidly connected to the device compartment, the humidification compartment comprising a humidification compartment depth; and

[0137] a bucket configured to contain a water supply, the bucket configured to receive the pressurised flow of breathable gas and output the pressurised flow of breathable gas with increased humidity, the bucket comprising:

[0138] a bucket base comprising a cavity configured to house the water supply, the bucket base comprising a length;

[0139] a bucket lid removably coupled to the bucket base and configured to selectively cover an opening of the cavity;

[0140] wherein the bucket base and the bucket lid as a unit are removably positionable within the humidification compartment;

[0141] wherein in use, the bucket is configured to be inserted into the humidification compartment along an insertion axis such that the humidification compartment depth and the length are measured parallel to the insertion axis, the length being greater than the humidification compartment depth such that a portion of the bucket base is exposed; and

[0142] wherein the bucket lid is configured to be removed from the bucket base along the insertion axis in use.

[0143] Another form of the technology includes a humidifier base for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier base comprising:

[0144] a device compartment configured to at least partially removably receive an RPT device, the RPT device configured to supply the pressurised flow of breathable gas; and

[0145] a humidification compartment fluidly connected to the device compartment; and

[0146] wherein the humidification compartment is configured to at least partially removably receive a humidification bucket, the arrangement being such that at least one of the RPT device and the humidification bucket is received within the base in a vertical direction.

[0147] In certain examples: a) the base comprises the humidification bucket; b) the humidification bucket is configured to contain a water supply; and / or c) the humidifier is configured to be at least partially removably received in the humidification compartment such that in an operational configuration, the humidification bucket is arranged to receive the pressurised flow of breathable gas and output the pressurised flow of breathable gas with increased humidity.

[0148] In certain examples: a) the bucket length is between about 25% to about 90% greater than the humidification compartment depth; b) the bucket length is about 66% greater than the humidification compartment depth; c) the humidification compartment includes a fluid passageway extending along the insertion axis; and / or d) the bucket base includes a passageway configured to at least partially receive the fluid passageway in use.

[0149] In certain examples: a) the base further includes a humidification compartment retention feature arranged within the humidification compartment; b) the humidification bucket further includes a humidification reservoir retention feature located on the humidification bucket base outside of the cavity and configured to removably engage with the first retention feature; c) the humidification bucket is configured to be guided into an engaged position by interaction between the humidification compartment retention feature and the humidification reservoir retention feature; and / or d) each of the humidification compartment retention feature and the humidification reservoir retention feature includes one or more.

[0150] In certain examples: a) a heater secured to a bottom or a wall of the bucket base and configured to heat the water supply; and / or b) a heater overmoulded to the bucket base (to a bottom or a wall of the bucket base).

[0151] In certain examples: a) the humidification compartment includes a humidification compartment depth; b) the humidification bucket includes a bucket length; c) in use, the humidification bucket is configured to be engageable with the humidification compartment along a vertical insertion axis such that the humidification compartment depth and the bucket length are measured parallel to the insertion axis; d) the length of the bucket is greater than the depth of the humidification compartment such that when the bucket is fully engaged, an upper portion of the base of the bucket extends above the humidification compartment to enable a user to operate; e) the humidification bucket includes a base and a lid configured to selectively engage the base; and / or f) the lid is removable from the base when the humidification bucket is located within the humidification compartment.

[0152] In certain examples: a) a medical device comprising the humidifier base; an RPT device having an RPT device length and configured to supply a pressurised flow of breathable gas, the RPT device being removably positionable within the device compartment; a patient interface configured to seal against an airway of a patient and to deliver the pressurised flow of breathable gas having added humidity to the airway of the patient; and a conduit arranged to fluidly connect the humidifier outlet to the patient interface so as to deliver the pressurised flow of breathable gas from the humidifier to the patient interface; b) the device compartment is arranged to receive the RPT device in a direction parallel to the insertion axis, such that the device compartment depth and the RPT device length are measured parallel to the insertion axis, the RPT device length being greater than the device compartment depth, such that a portion of the RPT device is exposed to enable manipulation by the user; and / or c) the conduit of the patient interface is connected to the base in a direction substantially perpendicular to the insertion axis.

[0153] Another form of the technology comprises a medical device comprising an RPT device configured to supply a pressurised flow of breathable gas, a humidifier configured to humidify the pressurised flow of breathable gas, and a patient interface configured to deliver the pressurised flow of breathable gas to an airway of a patient.

[0154] Another form of the technology comprises a base for a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the base comprising:

[0155] a device compartment;

[0156] a humidification compartment spaced apart from the device compartment;

[0157] wherein the device compartment is configured to receive a portable RPT device; and

[0158] wherein the humidification compartment is configured to receive a water reservoir.

[0159] Another form of the technology comprises a system for humidifying a pressurised flow of breathable gas to be delivered to a patient to ameliorate a respiratory disorder, the system comprising:

[0160] a base comprising:

[0161] a device compartment comprising a device compartment bottom surface and device compartment side walls, and

[0162] a humidification compartment fluidly connected to the device compartment, the humidification compartment comprising a humidification compartment bottom surface and humidification compartment side walls;

[0163] an RPT device configured to supply the flow of pressurized breathable gas, the RPT device being removably positionable within the device compartment of the base, wherein the device compartment sidewall extends partially along the RPT device when the RPT device is positioned within the device compartment; and

[0164] a humidification bucket configured to hold a supply of water and being at least partially removably received in the humidification compartment, such that in an operational configuration the humidification bucket is arranged to receive the flow of pressurized breathable gas and output the flow of pressurized breathable gas having increased humidity, wherein the device compartment sidewall extends partially along the humidification bucket when the humidification bucket is positioned within the device compartment;

[0165] wherein the RPT device is at least partially exposed from the device compartment in an operational position; and

[0166] wherein the humidification bucket is at least partially exposed from the humidification compartment in an operational position.

[0167] In some forms: a) the humidification compartment is spaced apart from the device compartment such that the device compartment sidewall is separated from the humidification compartment sidewall; b) the device compartment sidewall is oriented perpendicularly relative to the device compartment bottom surface; c) the humidification compartment sidewall is oriented perpendicular to the humidification compartment bottom surface; d) the device compartment sidewall is at least partially curved; and / or e) the humidification compartment sidewall is at least partially curved.

[0168] In some forms: a) the humidification bucket is arranged to engage and disengage the base along a humidification bucket insertion axis oriented substantially perpendicularly relative to the humidification compartment bottom surface; b) the RPT device is arranged to engage and disengage the base along an RPT device insertion axis oriented substantially perpendicular to the device compartment bottom surface; and / or c) the RPT device and the humidification bucket are configured to be inserted into the base along parallel axes.

[0169] In some forms: a) the humidification compartment further comprises a humidification compartment retention feature; b) the humidification bucket further comprises a humidification reservoir retention feature configured to reversibly engage with the humidification compartment retention feature; and / or c) the humidification bucket is configured to be guided into and / or retained in the operational configuration by suitable engagement between the humidification compartment retention feature and the humidification reservoir retention feature.

[0170] In some forms: a) the humidification chamber retention feature comprises a first magnet and a second magnet having an opposite polarity to the first magnet; b) the humidification reservoir retention feature comprises a first magnet and a second magnet having an opposite polarity to the first magnet; and / or c) the humidification tub is configured to be guided into and / or held in the operational configuration by aligning the first magnet of the humidification chamber retention feature with the second magnet humidification reservoir retention feature, and by aligning the second magnet of the humidification chamber retention feature with the first magnet humidification reservoir retention feature.

[0171] In some forms: a) the humidification chamber further comprises a first electrically conductive portion and the humidification tub comprises a second electrically conductive portion configured to contact the first electrically conductive portion; b) contact between the first electrically conductive portion and the second electrically conductive portion is configured to provide electrical energy to a heating element on the humidification tub; c) a fluid conduit extending from a humidification chamber bottom surface; d) the humidification tub comprises a passageway configured to receive the fluid conduit when the humidification tub is received in the humidification chamber; and / or e) the fluid conduit comprises a first channel and a second channel parallel to the first channel.

[0172] In some forms: a) the base further comprises an outlet configured to output a pressurised flow of breathable gas having increased humidity; b) an outlet perpendicular to the device chamber bottom surface and / or the humidification chamber bottom surface; c) a patient interface configured to seal to the patient’s face and deliver the pressurised flow of breathable gas having increased humidity to the patient’s airways; and / or d) a conduit arranged to fluidly connect the outlet to the patient interface so as to deliver the pressurised flow of breathable gas from the humidifier to the patient interface.

[0173] Another form of the technology includes a humidifier for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier comprising:

[0174] a base comprising:

[0175] a device chamber configured to at least partially removably receive an RPT device configured to supply the pressurised flow of breathable gas,

[0176] a humidification chamber,

[0177] an outlet,

[0178] a first fluid conduit extending between the device chamber and the humidification chamber, the first fluid conduit configured to convey pressurised breathable gas from the device chamber to the humidification chamber,

[0179] a second fluid conduit extending between the humidification chamber and the outlet, the second fluid conduit configured to convey pressurised breathable gas from the humidification chamber to the outlet, and

[0180] a third fluid conduit in communication with the first fluid conduit and / or the second fluid conduit;

[0181] a humidification bucket configured to hold water and at least partially removably received within the humidification compartment such that, in an operational configuration, the humidification bucket is arranged to receive a pressurized flow of breathable gas through the first fluid conduit and output a pressurized flow of breathable gas having increased humidity through the second fluid conduit to the outlet;

[0182] wherein the humidification bucket includes a channel configured to receive the third fluid conduit in the operational configuration.

[0183] In some forms: a) the third fluid conduit extends substantially perpendicularly out of the humidification compartment; b) the third fluid compartment includes a partition forming a first passageway and a second passageway; c) the first passageway is configured to transport the pressurized flow of breathable gas from the first fluid conduit into the humidification bucket; d) the second passageway is configured to transport the pressurized flow of breathable gas having increased humidity to the second fluid conduit; and / or e) the partition extends beyond an end of the third fluid conduit.

[0184] In some forms: a) the third fluid conduit extends substantially perpendicularly out of the humidification compartment; b) the third fluid compartment includes a partition forming a first passageway and a second passageway; c) the first passageway is configured to transport the pressurized flow of breathable gas from the first fluid conduit into the humidification bucket; d) the second passageway is configured to transport the pressurized flow of breathable gas having increased humidity to the second fluid conduit; and / or e) the partition extends beyond an end of the third fluid conduit.

[0185] Another form of the technology includes a medical device comprising:

[0186] a humidifier of any one of the preceding forms;

[0187] an RPT device configured to supply a pressurized flow of breathable gas, the RPT device being removably positionable within a device compartment of the humidifier; and

[0188] a patient interface configured to seal to a face of the patient and deliver the pressurized flow of breathable gas having increased humidity to an airway of the patient;

[0189] a conduit arranged to fluidly connect the outlet to the patient interface so as to deliver the pressurized flow of breathable gas from the humidifier to the patient interface.

[0190] In some forms: a) at least a portion of the RPT device is exposed and configured to be gripped by the patient when fully inserted into the device compartment; and / or b) at least a portion of the humidification chamber is exposed and configured to be gripped by the patient when fully inserted into the humidification compartment.

[0191] One aspect of one form of the technology is a portable RPT device that can be carried by an individual, e.g. around the individual’s home.

[0192] One aspect of one form of the technology is a portable humidifier that can be carried by an individual, e.g. around the individual’s home.

[0193] Of course, parts of aspects can form sub-aspects of the technology. Furthermore, sub-aspects and / or parts of aspects can be combined in various ways and also form additional aspects or sub-aspects of the technology.

[0194] Other features of the technology will be apparent from consideration of the information contained in the following detailed description, abstract, drawings and claims. 4BRIEF DESCRIPTION OF DRAWINGS

[0196] The technology is illustrated in the drawings by way of example and not limitation in which like references indicate similar elements, including:

[0197] 4.1 RESPIRATORY THERAPY SYSTEM

[0198] Figure 1A A system is shown that includes a patient 1000 wearing a patient interface 3000 in the form of a nasal pillows receiving a supply of air at positive pressure from an RPT device 4000. Air from the RPT device 4000 is humidified in a humidifier 5000 and passes along an air circuit 4170 to the patient 1000. A bed partner 1100 is also shown. The patient is sleeping in a supine sleeping position.

[0199] Figure 1B A system is shown that includes a patient 1000 wearing a patient interface 3000 in the form of a nasal mask receiving a supply of air at positive pressure from an RPT device 4000. Air from the RPT device is humidified in a humidifier 5000 and passes along an air circuit 4170 to the patient 1000.

[0200] Figure 1C A system is shown that includes a patient 1000 wearing a patient interface 3000 in the form of a full face mask receiving a supply of air at positive pressure from an RPT device 4000. Air from the RPT device is humidified in a humidifier 5000 and passes along an air circuit 4170 to the patient 1000. The patient is sleeping in a side sleeping position.

[0201] 4.2 Respiratory system and facial anatomy

[0202] Figure 2A A diagram showing a schematic view of the human respiratory system including the nasal and oral cavities, larynx, vocal folds, oesophagus, trachea, bronchi, lungs, alveolar sacs, heart and diaphragm.

[0203] 4.3 Patient interface

[0204] Figure 3A A patient interface in the form of a nasal mask according to one form of the present technology is shown.

[0205] Figure 3B A diagram showing a cross-section through a structure at a point. An outward normal at the point is indicated. The curvature at the point has a positive sign and a relatively large magnitude when compared to the curvature magnitude shown. Figure 3C

[0206] Figure 3C A diagram showing a cross-section through a structure at a point. An outward normal at the point is indicated. The curvature at the point has a positive sign and a relatively small magnitude when compared to the curvature magnitude shown. Figure 3B

[0207] Figure 3D A diagram showing a cross-section through a structure at a point. An outward normal at the point is indicated. The curvature at the point has a zero value.

[0208] Figure 3E A diagram showing a cross-section through a structure at a point. An outward normal at the point is indicated. The curvature at the point has a negative sign and a relatively small magnitude when compared to the curvature magnitude shown. Figure 3F

[0209] Figure 3F A diagram showing a cross-section through a structure at a point. An outward normal at the point is indicated. The curvature at the point has a negative sign and a relatively large magnitude when compared to the curvature magnitude shown. Figure 3E

[0210] Figure 3G A cushion for a mask is shown. An outer surface of the cushion is indicated. An edge of the surface is indicated. A domed region and a saddle region are indicated.

[0211] Figure 3H A cushion for a mask is shown. An outer surface of the cushion is indicated. An edge of the surface is indicated. A path on the surface between point A and point B is indicated. A straight line distance between point A and point B is indicated. Two saddle regions and a domed region are indicated.

[0212] 4.4 RPT device​​​​

[0213] Figure 4A An RPT device according to one form of the present technology is shown.

[0214] Figure 4B A schematic diagram of a pneumatic path of an RPT device according to one form of the present technology. The direction of upstream and downstream is indicated with reference to the blower and the patient interface. The blower is defined as being upstream of the patient interface and the patient interface is defined as being downstream of the blower, regardless of the actual flow direction at any particular moment. Items located within the pneumatic path between the blower and the patient interface are downstream of the blower and upstream of the patient interface.

[0215] 4.5 Humidifier

[0216] Figure 5A An isometric view of a humidifier according to one form of the present technology is shown.

[0217] Figure 5B An isometric view of a humidifier according to one form of the present technology is shown, showing the humidifier reservoir 5110 removed from the humidifier reservoir base 5130.

[0218] Figure 5C A schematic diagram of a humidifier according to one form of the present technology is shown.

[0219] Figure 5D A perspective view of a humidifier base supporting an RPT device and a water reservoir is shown.

[0220] Figure 5E A perspective view of Figure 5D a water reservoir having a base and a lid coupled to one another.

[0221] Figure 5F A perspective view of Figure 5D and Figure 5E a water reservoir, wherein the lid is uncoupled from the base.

[0222] Figure 5G A lower perspective view of the lid of Figures 5D to 5F a water reservoir is shown.

[0223] Figure 5H A top view of the base of Figures 5D to 5F a water reservoir is shown, with the lid removed.

[0224] Figure 5I A perspective view of Figure 5D a water RPT device and a liquid reservoir, wherein the cap is coupled to the base and the cap is separated from the liquid reservoir lid, exposing the water inlet passage that communicates with the base.

[0225] Figure 5JA perspective view of the water reservoir of the Figure 5I

[0226] Figure 5K A bottom perspective view of the water reservoir of the Figures 5D to 5J

[0227] Figure 5L A top perspective view of the humidifier base of the Figure 5D

[0228] Figure 5M An enlarged top perspective view of the humidifier receiving portion of the humidifier base of the Figure 5L

[0229] Figure 5N An alternative top perspective view of the humidifier base of the Figure 5L

[0230] Figure 5O A perspective view of the humidifier base of the Figure 5L

[0231] Figure 5P A bottom perspective view of the humidifier base of the Figure 5L

[0232] Figure 5Q A front cross-sectional view of the humidifier base of the Figure 5D 5DETAILED DESCRIPTION

[0234] Before describing the present technology in further detail, it is to be understood that the technology is not limited to the particular examples described herein, which can vary. It is also to be understood that the terminology used herein is for the purpose of describing particular examples only, and is not intended to be limiting.

[0235] The following description provides examples relating to various examples that can share one or more common characteristics and / or features. It is understood that one or more features of any one example can be combinable with one or more features of another example or other examples. In addition, any single feature or combination of features in any of the examples can constitute additional examples.

[0236] 5.1 Treatment

[0237] In one form, the present technology includes a method for treating a respiratory disorder, the method including applying positive pressure to the entrance of the airways of a patient 1000.

[0238] ​​​​​​​​In certain examples of the present technology, the supply of air at positive pressure is provided to the patient's nares via one or both nares.

[0239] In certain examples of the present technology, mouth breathing is limited, restricted or prevented.

[0240] 5.2 Respiratory therapy system

[0241] In one form, the present technology comprises a respiratory therapy system for treating a respiratory disorder. The respiratory therapy system can include an RPT device 4000 for supplying a flow of air to a patient 1000 via an air circuit 4170 and a patient interface 3000 or 3800.

[0242] 5.3 Patient interface

[0243] With reference to Figure 3A A patient interface 3000 according to one aspect of the present technology includes the following functional aspects: a seal-forming structure 3100, a pneumatic chamber 3200, a positioning and stabilising structure 3300, a vent 3400, a form of connection port 3600 for connection to an air circuit 4170, and a forehead support 3700. In some forms, a functional aspect can be provided by one or more physical components. In some forms, one physical component can provide one or more functional aspects. In use, the seal-forming structure 3100 is arranged to surround an entrance to the airways of a patient so as to maintain positive pressure at the entrance to the airways of a patient 1000. The sealed patient interface 3000 is thus suitable for the delivery of positive pressure therapy.

[0244] A patient interface can not be suitable for respiratory pressure therapy if it is not able to comfortably deliver a minimum level of positive pressure to the airways.

[0245] A patient interface 3000 according to one form of the present technology is constructed and arranged to be capable of providing a supply of air at a positive pressure of at least 6 cmH20 relative to ambient.

[0246] A patient interface 3000 according to one form of the present technology is constructed and arranged to be capable of providing a supply of air at a positive pressure of at least 10 cmH20 relative to ambient.

[0247] A patient interface 3000 according to one form of the present technology is constructed and arranged to be capable of providing a supply of air at a positive pressure of at least 20 cmH20 relative to ambient.

[0248] 5.3.1 Seal-forming structure

[0249] In one form of the present technology, Figure 3AThe seal-forming structure 3100 provides a target seal-forming region and can additionally provide a cushioning function. The target seal-forming region is the region of the seal-forming structure 3100 upon which a seal is likely to form. The region where a seal actually forms - the actual seal-forming surface - can vary from day to day and from patient to patient, depending on a range of factors including, for example, the position of the patient interface on the face, the tension in the positioning and stabilising structure and the shape of the patient's face.

[0250] In one form, the target seal-forming region is located on an outer surface of the seal-forming structure 3100.

[0251] In certain forms of the present technology, the seal-forming structure 3100 is constructed from a biocompatible material, for example silicone rubber.

[0252] The seal-forming structure 3100 according to the present technology can be constructed from a soft, flexible, resilient material such as silicone.

[0253] In certain forms of the present technology, a system is provided that includes more than one seal-forming structure 3100, each seal-forming structure 3100 being configured to correspond to a different size and / or shape range. For example, the system can include one form of seal-forming structure 3100 that is suitable for large sized heads but not small sized heads, and another that is suitable for small sized heads but not large sized heads.

[0254] In one form, the patient interface 3000 includes a vent 3400 constructed and arranged to allow flushing of exhaled gases, for example carbon dioxide.

[0255] In certain forms, the vent 3400 is configured to allow a continuous vent flow from an interior of the plenum chamber 3200 to ambient, while the pressure within the plenum chamber is positive relative to ambient. The vent 3400 is configured such that the vent flow has a magnitude sufficient to reduce rebreathing of exhaled C02 by the patient, while maintaining the therapeutic pressure in the plenum chamber in use.

[0256] One form of vent 3400 according to the present technology includes a plurality of holes, for example, about 20 to about 80 holes, or about 40 to about 60 holes, or about 45 to about 55 holes.

[0257] The vent 3400 can be located in the plenum chamber 3200. Alternatively, the vent 3400 is located in a decoupling structure, for example a swivel.

[0258] 5.3.2 Decoupling structure

[0259] In one form, the patient interface 3000 includes at least one decoupling structure, such as a rotary joint, a ball joint, and / or a bend.

[0260] 5.3.3 Connection Port

[0261] Connection port 3600 allows connection to air circuit 4170.

[0262] 5.3.4 Forehead stent

[0263] In one configuration, the patient interface 3000 includes a forehead support 3700.

[0264] 5.3.5 Anti-suffocation valve

[0265] In one configuration, the patient interface 3000 includes an anti-asphyxiation valve.

[0266] 5.3.6 port

[0267] In one embodiment of this technology, the patient interface 3000 includes one or more ports that allow access to the volume within the pneumatic chamber 3200. In one embodiment, this allows a clinician to supply supplemental oxygen. In one embodiment, this allows for direct measurement of the properties of the gas within the pneumatic chamber 3200, such as pressure.

[0268] 5.4RPT device

[0269] like Figure 4A and 4B As shown, an RPT device 4000 according to one aspect of the present technology includes mechanical, pneumatic and / or electrical components and is configured to perform one or more algorithms 4300, such as all or part of any of the methods described herein. The RPT device 4000 can be configured to generate an airflow for delivery to a patient's airway, such as to treat one or more respiratory conditions described elsewhere in this document.

[0270] In one embodiment, the RPT device 4000 is configured and arranged to deliver an airflow in the range of -20 L / min to +150 L / min while maintaining a positive pressure of at least 6 cmH2O, or at least 10 cmH2O, or at least 20 cmH2O.

[0271] The RPT device may have an outer housing 4010, which is composed of two parts: an upper part 4012 and a lower part 4014. Furthermore, the outer housing 4010 may include one or more panels 4015. The RPT device 4000 includes a chassis 4016 that supports one or more internal components of the RPT device 4000. The RPT device 4000 may include a handle 4018.

[0272] The pneumatic path of the RPT device 4000 can include one or more air path items, for example, an inlet air filter 4112, an inlet muffler 4122, a pressure generator 4140 capable of supplying positive pressure air (e.g., a blower 4142), an outlet muffler 4124, and one or more transducers 4270, such as pressure and flow sensors.

[0273] One or more air path items can be provided within a detachable separate structure, which will be referred to as a pneumatic block 4020. The pneumatic block 4020 can be provided within the outer housing 4010. In one form, the pneumatic block 4020 is supported by, or forms part of, the chassis 4016.

[0274] The RPT device 4000 can have a power supply 4210, one or more input devices 4220, a pressure generator 4140, one or more protection circuits, a memory, transducers 4270. The electrical components 4200 can be mounted on a single printed circuit board assembly (PCBA) 4202. In alternative forms, the RPT device 4000 can include more than one PCBA 4202.

[0275] 5.4.1 RPT device mechanical and pneumatic components

[0276] The RPT device can include one or more of the following components in an integral unit. In an alternative form, one or more of the following components can be provided as separate units.

[0277] In some forms, the RPT device can be portable.

[0278] In some forms, the RPT device can be modular. For example, the RPT device can be detachably coupled with other systems (e.g., an external battery, a humidifier, etc.). The RPT device can operate as a separate unit (e.g., without another modular system) or when connected with one of the other systems. In some forms, a dock can be used to connect the various modular systems together. In other words, the RPT device can operate without being connected to the dock when used alone. The RPT device can be coupled to the dock only when usable with one of the other systems.

[0279] 5.4.1.1 Air filter

[0280] An RPT device according to one form of the present technology can include one air filter 4110, or a plurality of air filters 4110.

[0281] In one form, the inlet air filter 4112 is provided at the start of the pneumatic path upstream of the pressure generator 4140.

[0282] In one form, an outlet air filter 4114, such as an anti-bacterial filter, is provided between the pneumatic block 4020 and the patient interface 3000.

[0283] 5.4.1.2 Silencer

[0284] An RPT device in accordance with one form of the technology can include a silencer 4120 or a plurality of silencers 4120.

[0285] In one form of the technology, an inlet silencer 4122 is provided in the pneumatic path upstream of the pressure generator 4140.

[0286] In one form of the technology, an outlet silencer 4124 is provided in the pneumatic path between the pressure generator 4140 and the patient interface 3000.

[0287] 5.4.1.3 Pressure Generator

[0288] In one form of the technology, the pressure generator 4140 for generating a flow or supply of air at positive pressure is a controllable blower 4142. For example, the blower 4142 can include a brushless DC electric motor 4144 with one or more impellers. The impellers can be located in a volute. The blower is capable of delivering a supply of air when delivering a respiratory pressure therapy, for example, at a rate of up to about 120 litres / minute, at a positive pressure in the range of about 4 cmH20 to about 20 cmH20, or in other forms up to about 30 cmH20. The blower can be as described in any one of the following patents or patent applications, the contents of which are incorporated by reference in their entirety: US Patent No. 7,866,944; US Patent No. 8,638,014; US Patent No. 8,636,479; and PCT Patent Application Publication No. WO 2013 / 020167.

[0289] The pressure generator 4140 can be under the control of the therapy device controller.

[0290] In other forms, the pressure generator 4140 can be a piston driven pump, a pressure regulator connected to a high pressure source (e.g. a reservoir of compressed air), or a bellows.

[0291] 5.4.1.4 Transducer

[0292] The transducer can be internal to the RPT device, or external to the RPT device. An external transducer can be provided on or form part of, for example, an air circuit such as a patient interface. An external transducer can be in the form of a non-contact sensor, such as a Doppler radar motion sensor that transmits or transmits data to the RPT device.

[0293] In one form of the present technology, one or more transducers 4270 can be positioned upstream and / or downstream of the pressure generator 4140. The one or more transducers 4270 can be constructed and arranged to generate a signal representative of airflow at that point in the pneumatic path, such as flow, pressure or temperature.

[0294] In one form of the present technology, one or more transducers 4270 can be positioned proximally of the patient interface 3000 or 3800.

[0295] In one form, the signal from the transducer 4270 can be filtered, such as by low pass filtering, high pass filtering, or band pass filtering.

[0296] 5.4.1.5 Anti-overflow check valve

[0297] In one form of the present technology, an anti-overflow check valve 4160 is provided between the humidifier 5000 and the pneumatic block 4020. The anti-overflow check valve is constructed and arranged to reduce the risk of water flowing upstream from the humidifier 5000 to, for example, the motor 4144.

[0298] 5.4.2 Electrical components of the RPT device

[0299] 5.4.2.1 Power supply

[0300] The power supply 4210 can be positioned internal or external to the external housing 4010 of the RPT device 4000.

[0301] In one form of the present technology, the power supply 4210 provides power only to the RPT device 4000. In another form of the present technology, the power supply 4210 provides power to both the RPT device 4000 and the humidifier 5000.

[0302] 5.4.2.2 Input device

[0303] In one form of the present technology, the RPT device 4000 includes one or more input devices 4220 in the form of buttons, switches or dials to allow a person to interact with the device. The buttons, switches or dials can be physical devices accessed via a touch screen or software devices. In one form, the buttons, switches or dials can be physically connected to the external housing 4010, or in another form, the buttons, switches or dials can be in wireless communication with a receiver that is in electrical connection with a central controller.

[0304] In one form, the input device 4220 can be constructed or arranged to allow a person to select a value and / or a menu option.

[0305] 5.5 Air circuit

[0306] An air circuit 4170 according to an aspect of the present technology is a conduit or tube which, in use, is constructed and arranged to allow a flow of air between two components, such as the RPT device 4000 and the patient interface 3000.

[0307] In particular, the air circuit 4170 can be in fluid connection with the pneumatic block 4020 and the outlet of the patient interface. The air circuit can be referred to as an air delivery tube. In some cases, there can be separate circuits for inhalation and exhalation. In other cases, a single limb is used.

[0308] In some forms, the air circuit 4170 can include one or more heating elements configured to heat air in the air circuit, for example to maintain or raise the temperature of the air. The heating elements can be in the form of a heating wire circuit, and can include one or more transducers, such as temperature sensors. In one form, the heating wire circuit can be helically wound around the axis of the air circuit 4170. The heating elements can be in communication with a controller, such as a central controller. One embodiment of a control circuit 4170 including a heating wire circuit is described in US Patent 8,733,349, which is incorporated herein by reference in its entirety.

[0309] 5.5.1 Supplementary gas delivery

[0310] In one form of the present technology, supplemental gas (e.g. oxygen) 4180 is delivered to one or more points in the pneumatic path, such as upstream of the pneumatic block 4020, to the air circuit 4170, and / or to the patient interface 3000 or 3800.

[0311] 5.6 Humidifier

[0312] 5.6.1 Humidifier overview

[0313] In one form of the present technology, a humidifier 5000 (e.g. as shown in Figure 5A is provided to change the absolute humidity of the air or gas delivered to the patient relative to the ambient air. Typically, the humidifier 5000 is used to increase the absolute humidity of the flow of air and to increase the temperature of the flow of air (relative to ambient air) before delivery to the airways of the patient.

[0314] The humidifier 5000 can include a humidification tub or humidifier reservoir 5110, a humidifier inlet 5002 for receiving a flow of air, and a humidifier outlet 5004 for delivering a humidified flow of air. In some forms, as Figure 5A and 5BAs shown, the inlet and outlet of the humidifier reservoir 5110 can be the humidifier inlet 5002 and the humidifier outlet 5004, respectively. The humidifier 5000 can also include a humidifier base 5006, which can be adapted to receive the humidifier reservoir 5110 and include a heating element 5240.

[0315] 5.6.2 Humidifier components

[0316] 5.6.2.1 Reservoir

[0317] According to one arrangement, the humidifier 5000 can include a reservoir 5110 configured to hold or retain a volume of liquid (e.g. water) to be vaporised for humidifying an air flow. The reservoir 5110 can be configured to hold a predetermined maximum water volume so as to provide sufficient humidification for a duration of at least a respiratory session, such as a night of sleep. Typically, the reservoir 5110 is configured to hold a few hundred millilitres of water, for example, 300 millilitres (ml), 325 ml, 350 ml or 400 ml. In other forms, the humidifier 5000 can be configured to receive a water supply from an external water supply, such as a building’s water supply system.

[0318] According to one aspect, the reservoir 5110 is configured to humidify air flow from the RPT device 4000 as the air flow passes therethrough. In one form, the reservoir 5110 can be configured to facilitate the air flow to travel in a tortuous path through the reservoir 5110 as it comes into contact with the volume of water therein.

[0319] According to one form, the reservoir 5110 can be detachable from the humidifier 5000, for example, along a transverse direction as shown in Figure 5A and Figure 5B .

[0320] The reservoir 5110 can also be configured to prevent liquid from passing through any aperture and / or flowing therefrom between subcomponents thereof, such as when the reservoir 5110 is displaced and / or rotated from its normal operating orientation. As the air flow to be humidified by the humidifier 5000 is typically pressurised, the reservoir 5110 can also be configured to avoid loss of pneumatic pressure through leaks and / or flow resistances.

[0321] As shown in Figures 5D-5Q , the humidifier 5000 can be designed not as a separate entity to be engaged with the RPT device, but rather in the form of a docking station, such as a humidifier reservoir dock 5130 configured to receive the RPT device 4000 and the reservoir 5110. Such a configuration allows the reservoir 5110 to be designed with an ergonomic shape and / or configuration, which can make the reservoir 5110 easier to pick up or otherwise handle.

[0322] In some forms, the ergonomic shape can allow the patient to comfortably pick up or otherwise handle the water reservoir 5110 with one hand. For example, the water reservoir 5110 can replicate a water bottle or other portable water container that the patient typically holds with one hand. The patient can be able to grasp the water reservoir 5110 so that one hand comfortably fits, and without needing the other hand to carry or support the water reservoir 5110.

[0323] The shape of the water reservoir 5110 can be circular, and a size that is easy to grasp. For example, the water reservoir 5110 can have a cylindrical or rectangular prismatic shape (e.g., a flat outer surface 5009 with rounded edges) that can comfortably fit in the patient’s hand. Such a shape can comfortably fit in the patient’s hand with limited or no discomfort (e.g., from jagged edges).

[0324] In one form, the water reservoir 5110 can have a circular, rectangular prismatic shape. In other words, at least some of the corners of the water reservoir 5110 can be rounded, while the sides of the water reservoir 5110 can be planar (e.g., flat). The flat surfaces can provide an easy-to-grasp surface for the patient, while the rounded corners limit sharp edge contact with the patient’s hand and cause discomfort.

[0325] In certain forms, the water reservoir 5110 can be symmetrical about at least one axis (e.g., the water reservoir axis 5116). This symmetrical shape can make it easier for the patient to grasp their hand and hold for an extended period of time (e.g., while cleaning and / or refilling the water reservoir 5110).

[0326] Additionally, the width of the water reservoir 5110 can be less than the average hand span of the patient (i.e., the distance measured from the tip of the patient’s thumb to the tip of the patient’s little finger). Moreover, the width of the water reservoir 5110 can be substantially less than the average hand span of the patient, such as less than half of the average hand span of the patient. This width can allow the patient to comfortably hold the water reservoir 5110 without straining their hand, or without needing their other hand to support the water reservoir 5110.

[0327] In some forms, the width of the water reservoir 5110 can be less than 25 cm. In some examples, the width of the water reservoir 5110 can be equal to or less than 20 cm. In some examples, the width of the water reservoir 5110 can be equal to or less than 15 cm. In some examples, the width of the water reservoir 5110 can be equal to or less than 10 cm.

[0328] The ergonomic shape and vertical orientation of the reservoir 5110, as well as the vertical direction of insertion / extraction, can be particularly useful for patients with conditions other than respiratory disorders (such as OSA). For example, a patient may have arthritis, which can make it difficult to grasp the reservoir 5110 and may interfere with their ability to refill and / or clean the reservoir 5110. By constructing the reservoir 5110 with a narrow width as described above, patients suffering from pain can more easily manage the reservoir 5110 independently (e.g., without assistance from a bed partner, clinician, etc.), which can increase compliance (e.g., because the patient is less dependent on others).

[0329] The ergonomic shape also allows a variety of patients to use a single-size reservoir 5110 (e.g., one size is best suited). In other words, hand span varies among different patients and between different genders (e.g., the average hand span of women may be smaller than that of men). By designing the width of the reservoir 5110 to be smaller than average (e.g., smaller than the average hand span of women), most patients will be able to grasp the reservoir 5110 with one hand.

[0330] like Figures 5E to 5H As shown, some forms of the humidifier 5000 and water reservoir 5110 may include a humidifier reservoir base 5007 and a humidifier cover 5008, which selectively covers access to the reservoir cavity 5112 (see example...). Figure 5H The opening of the reservoir cavity 5112 can be configured to hold or retain a certain volume of liquid.

[0331] In some forms, the humidifier reservoir base 5007 includes an outer surface 5009 and an inner surface 5010 (or an outer surface 5009 and an inner surface 5010). The outer surface 5009 is exposed to the surrounding environment and can be gripped by a patient. The inner surface 5010 may be opposite the outer surface 5009 in thickness of the humidifier reservoir base 5007. The inner surface 5010 may at least partially form the boundary of the reservoir cavity 5112 (e.g., fluid within the reservoir cavity 5112 may have direct contact with the inner surface 5010).

[0332] In some configurations, the humidifier cover 5008 may be removably coupled to the humidifier reservoir base 5007. The humidifier cover 5008 may be selectively movable between an open position and a closed position, in which at least a portion of the reservoir cavity 5112 is exposed, and in the closed position, the reservoir cavity 5112 is covered by the humidifier cover 5008.

[0333] In some configurations, the humidifier cover 5008 may be in a closed position when fully engaged with the humidifier reservoir base 5007. The humidifier cover 5008 may be in an open position when partially engaged with the humidifier reservoir base 5007 (e.g., not in a sealed engagement) and / or when the humidifier cover 5008 is completely removed from the humidifier reservoir base 5007.

[0334] In some forms, the humidifier reservoir base 5007 may include a stepped surface 5300 adjacent to an opening in the container cavity 5112. A protrusion 5302 may extend over the surface 5300 (e.g., substantially parallel to the stepped surface 5300). The humidifier cap 5008 may include complementary protrusions 5304 spaced apart along its inner surface, configured to selectively engage the protrusions 5302 of the humidifier reservoir base 5007 such that the cap is secured to the humidifier reservoir base 5007 when the cap is rotated.

[0335] In one embodiment, the shape of the opening leading to the reservoir cavity 5112 differs from the shape of the outer periphery of the humidifier reservoir base 5007. For example, as... Figures 5D to 5K As shown, the opening to the reservoir cavity 5112 can be circular to more effectively facilitate relative rotation between the humidifier cap 5008 and the humidifier reservoir base 5007, while the outer periphery can be formed as a rounded rectangle. The humidifier cap 5008 may have a shape complementary to the humidifier reservoir base 5007 (e.g., the outer periphery may be a rounded rectangle, and the inner periphery may be circular). In other examples, the opening to the reservoir cavity 5112, the humidifier reservoir base 5007, and / or the outer periphery of the humidifier cap 5008 may all have the same shape (circular, rounded rectangle, etc.).

[0336] In some forms, the humidifier reservoir base 5007 is threadedly engaged to the humidifier cap 5008 in the closed position. In other forms, the humidifier reservoir base 5007 is threadedly engaged to the humidifier cap 5008 in the closed position (although other types of engagement, such as bayonet engagement, may also be used). In other words, when the humidifier cap 5008 is rotated relative to the humidifier reservoir base 5007 (e.g., clockwise), a protrusion 5304 of the humidifier cap 5008 engages a protrusion 5302 of the humidifier reservoir base 5007. The protrusion 5302 can pull the humidifier cap 5008 (e.g., via the protrusion 5304) toward the humidifier reservoir base 5007 to selectively cover the container cavity 5112.

[0337] In one configuration, the threaded engagement between the humidifier reservoir base 5007 and the humidifier cover 5008 can form a sealing engagement. In other words, in the closed position, a fluid seal may exist between the humidifier reservoir base 5007 and the humidifier cover 5008 due to the engagement of the protrusions 5302, 5304. The liquid seal can limit and / or prevent water leakage from the reservoir cavity 5112 (e.g., if the reservoir 5110 is tilted or even inverted).

[0338] In one embodiment, a seal (e.g., a thin (e.g., silicone) lip seal or an O-ring) may be arranged around the periphery of the opening leading to the reservoir cavity 5112 and / or around the inner periphery of the humidifier cap 5008. The seal may provide a fluid-tight connection between the humidifier reservoir base 5007 and the humidifier cap 5008. An additional form of sealing may also be provided if the threaded connection itself forms a fluid-impermeable seal.

[0339] In some configurations, a patient can disengage the humidifier cap 5008 from the humidifier reservoir base 5007 using only one hand. For example, the weight and / or stability of the humidifier reservoir base 5007, and the ease of engagement between the humidifier cap 5008 and the humidifier reservoir base 5007, allow the patient to twist the humidifier cap 5008 relative to the humidifier reservoir base 5007 with one hand and disengage the protrusions 5302 and 5304—without requiring support from the humidifier reservoir base 5007. The non-circular cross-sectional shape of the humidifier reservoir 5110 further facilitates one-handed operation, preventing the humidifier reservoir 5110 from rotating within its dedicated humidification compartment 5134 during opening. Such one-handed operation is beneficial for patients suffering from conditions such as arthritis, as opening with one hand may be easier and provide less discomfort (e.g., compared to using both hands). By ensuring that the force required to separate the humidifier cap 5008 from the humidifier reservoir base 5007 is likely to be low, thus eliminating the need for the patient to pull on the cap to rotate and remove it, one-handed operation of the cap can be achieved at least partially. Making the decoupling process easier and more comfortable (e.g., one-handed operation) can lead to increased use of the RPT device and improved compliance rates for some patients.

[0340] like Figures 5E-5J As shown, some forms of the humidifier 5000 may include a plug or cap 5308 that can be removably attached to the humidifier cover 5008 to selectively cover the inlet opening 5310.

[0341] In some forms, the cap 5308 can be constructed of an elastomeric material. This can include rubber, synthetic rubber, or any similar material. The elastomeric material can allow the cap 5308 to seal into the water inlet 5310. For example, the cap 5308 can selectively restrict or prevent fluid from entering and / or exiting through the water inlet 5310. In other forms, the cap 5308 can be constructed of a hardened, rigid, and / or semi-rigid material that is capable of sealing into the water inlet 5310. Combinations between more rigid materials and elastomeric materials can also be used, with the elastomeric material being used to achieve a seal with the opening of the humidifier lid 5008.

[0342] As shown in FIG. 53, in some forms, the cap 5308 can have a lower portion 5312 and a body 5314. The lower portion 5312 can extend away from the body 5314 and include a shape that substantially corresponds to the shape of the water inlet 5310 (e.g., substantially cylindrical). Figure 5I

[0343] In certain forms, the cap 5308 can also include a user engagement portion 5316, which can be an extension of the body 5314. For example, the body 5314 and the user engagement portion 5316 can be formed in the same plane, while the lower portion 5312 extends away from the body 5314 in a direction substantially perpendicular to the plane. The body 5314 and the user engagement portion 5316 can together form a “teardrop” shape. In other words, the body 5314 can have a substantially circular shape, and the user engagement portion 5316 can have a substantially triangular shape that merges with the substantially circular shape.

[0344] In certain forms, the cap 5308 can seal with the water inlet 5310 via a press fit, a friction fit, and / or a snap fit. For example, the lower portion 5312 can be slightly wider (e.g., have a larger diameter) than the water inlet 5310.

[0345] In one form, the elastomeric material can deform in order to fit within the smaller diameter of the water inlet 5310. Once inside, the lower portion 5312 can at least partially expand to its original shape. The expanding material can contact the inner surface 5010 of the water inlet 5310 and form a seal that can restrict fluid from exiting and / or entering the reservoir cavity 5112 through the water inlet 5310.

[0346] In one form, the wider diameter of the lower portion 5312 can be removably positioned around the exterior of the water inlet 5310. For example, the elastomeric material of the lower portion 5312 can deform and expand in order to fit around the exterior of the water inlet 5310. The elastomeric material can attempt to constrict around the water inlet 5310 and can restrict fluid from exiting and / or entering the reservoir cavity 5112 through the water inlet 5310. ​

[0347] As shown, the cap 5308 can be removed with one hand. Additionally, the cap 5308 can be constructed and configured such that a significant amount of force is not needed to remove the cap 5308 from the humidifier lid 5008 and expose the water inlet 5310. As noted above, this can be helpful for patients suffering from arthritis or any other similar ailment. Figure 5I

[0348] In some forms, the patient can grasp the cap 5308 by using the user engagement portion 5316, which can be free and / or otherwise configured to manipulate the end of the cap 5308 (i.e., that is enlarged and / or spaced apart from the surface of the humidifier lid 5008). This can allow the patient to grasp their fingers around the user engagement portion 5316 and pull the cap 5308 off of the humidifier lid 5008 without enough difficulty. Additionally, the user engagement portion 5316 can be constructed of a resilient material (e.g., along with the rest of the cap 5308), which can allow the patient to flex the user engagement portion 5316 when grasping the cap 5308. This can provide additional leverage and make it easier for the patient to remove the cap 5308.

[0349] As shown, once the cap 5308 is removed, the patient can add more water (or other liquid) to the water reservoir 5110 through the water inlet 5310. The water inlet 5310 can be large enough in diameter to allow the patient to easily pour or add liquid through the water inlet 5310. Figure 5J

[0350] In some forms, the water inlet 5310 can have a diameter of at least about 1 cm. In some forms, the water inlet 5310 can have a diameter of at least about 2 cm. In some forms, the water inlet 5310 can have a diameter of at least about 3 cm. In some forms, the water inlet 5310 can have a diameter of at least about 4 cm. In some forms, the water inlet 5310 can have a diameter of at least about 5 cm.

[0351] In the above example, the water inlet 5310 allows the patient to fill the water reservoir 5110 in situ - without needing to remove the humidifier lid 5008 from the humidifier reservoir base 5007. Removing the cap 5308 from the humidifier lid 5008 can be easier and / or faster than removing the humidifier lid 5008 from the humidifier reservoir base 5007 (e.g., the patient can not need to disengage and re-engage the water reservoir 5110 to the water reservoir base 5130). Thus, this can make it easier for the patient to refill the water reservoir 5110.

[0352] As shown, the cap 5308 can be removed with one hand. Additionally, the cap 5308 can be constructed and configured such that a significant amount of force is not needed to remove the cap 5308 from the humidifier lid 5008 and expose the water inlet 5310. As noted above, this can be helpful for patients suffering from arthritis or any other similar ailment. Figures 5F-5H ​​As shown, the humidifier lid 5008 can also include a shroud 5318. As will be explained below, the shroud 5318 assists in the operation of the humidification platform by redirecting the airflow while isolating the inlet / outlet duct partitions 5346 and 5350 Figure 5O ) from the water poured through the water inlet 5310, thus allowing the reservoir 5110 to be filled without removing the reservoir 5110 from the base.

[0353] In some forms, the shroud 5318 includes a perimeter having a shape that is complementary to the shape of the opening of the reservoir cavity 5112. For example, the outer perimeter of the shroud 5318 can be substantially circular.

[0354] In some forms, the humidifier lid 5008 can include an upper portion 5320 that is graspable by a patient in order to rotate the humidifier lid 5008. The shroud 5318 can be spaced apart from the upper portion 5320. For example, the shroud 5318 can be offset downward from the upper portion 5320 when the humidifier lid 5008 is connected to the humidifier reservoir base 5007. In other words, the shroud 5318 can be disposed within the container cavity 5112 when the humidifier lid 5008 is coupled to the humidifier reservoir base 5007 (e.g., in the closed position).

[0355] In some forms, the shroud 5318 can have a curvature. For example, the shroud 5318 can have a curvature of a dome shape. As Figure 5F and 5G shown, the shroud 5318 can have a positive dome curvature such that, when positioned within the reservoir cavity 5112, the shroud 5318 has a positive dome curvature relative to the humidifier reservoir base 5007 (i.e., it has a concave surface facing the humidifier reservoir base 5007) and a negative dome curvature relative to the upper portion 5320.

[0356] In certain forms, the shroud 5318 can have a uniform curvature over its surface area. For example, the shroud 5318 can be symmetrical about multiple axes (e.g., if the shroud is a portion of a spherical surface).

[0357] In some forms, the shroud 5318 can be coupled to the wall of the water inlet 5310. One end of the wall of the water inlet 5310 can be coupled to the upper portion 5320 and the other end can be coupled to the shroud 5318, thereby spacing the shroud 5318 apart from the upper portion 5320 (e.g., by the length of the water inlet 5310). As Figure 5G and 5Q shown, the water inlet 5310 can form a channel that extends through the thickness of the humidifier lid 5008 such that the water inlet 5310 can include distinct inlets and outlets separated by the length of the channel (e.g., the thickness of the humidifier lid 5008).

[0358] In some forms, the shield 5318 may define a surface configured to prevent liquid poured into the inlet 5310 from directly entering the humidifier reservoir base 5007. For example... Figure 5G As shown, outlet 5322 can be arranged adjacent to shroud 5318 (e.g., at the apex of the curvature of shroud 5318). Shroud 5318 can engage with inlet 5310 to form outlet 5322. Outlet 5322 includes a circumferential opening that can extend around at least a portion of the periphery of inlet 5310, wherein at least a portion of the upper boundary of outlet 5322 is defined by the wall of inlet 5310, and at least a portion of the lower boundary of outlet 5322 is defined by the upper surface of shroud 5318. Fluid can exit outlet 5322 in a direction substantially perpendicular to the direction in which fluid enters inlet 5310.

[0359] In some forms, the humidifier cover 5008 may be made of a thin film with a relatively small thickness. The inlet 5310 may not include a channel (e.g., as described above and...). Figure 5G and 5Q (as shown in the diagram), and alternatively may include a single opening that serves as both an inlet and an outlet for the humidifier cover 5008 (e.g., the inlet and outlet are not visible due to the relatively small thickness of the humidifier cover 5008). The inlet 5310 may not include a wall, as it comprises a substantially small thickness, so the cover 5318 may be attached to another area of ​​the humidifier cover 5008.

[0360] In some forms, the convex curvature of the shroud 5318 can guide fluid exiting the outlet 5322 downward toward the bottom of the humidifier reservoir base 5007. Thus, the curvature helps gravity guide the liquid into the humidifier reservoir base 5007. Additionally, the shroud 5318 can radially guide fluid away from the reservoir axis 5116 of the reservoir 5110 toward the outer surface 5009 (also referred to as a sidewall or side surface) of the humidifier reservoir base 5007 (e.g., toward a flat outer surface 5009).

[0361] like Figure 5H As shown, the reservoir cavity 5112 of the reservoir 5110 may include a generally open spatial volume. For example, the outermost boundary of the reservoir cavity 5112 may extend to the inner surface 5010 of the humidifier reservoir base 5007.

[0362] In some configurations, column 5324 may be disposed within reservoir cavity 5112. When humidifier 5000 is used, column 5324 may extend at least partially along the height of humidifier reservoir base 5007 in the vertical direction.

[0363] In some configurations, the columns 5324 may be arranged concentrically and extend along the reservoir axis 5116 of the cavity 5112.

[0364] In some forms, the column 5324 may have a generally symmetrical shape. For example, the column 5324 may be cylindrical or truncated conical. The reservoir cavity 5112 may also have a generally symmetrical shape overall.

[0365] In some forms, the column 5324 may be hollow and include a channel 5326. The shape of the channel 5326 may be substantially the same as the shape of the column 5324. In other words, the outer and inner surfaces of the column 5324 may be substantially the same shape.

[0366] In some forms, the diameter of channel 5326 can be substantially equal to the diameter of inlet 5310. The apex of shield 5318 can also be concentric with the center of channel 5326, so that shield 5318 can be symmetrical about channel 5326.

[0367] In some forms, the shield 5318 may be different from the channel 5326 facing the shield 5318 in use (see example). Figure 5Q The diameter of at least the outlet opening of the shroud 5318 is wider. In the example where the shroud 5318 and the channel 5326 are concentric, the outer edge of the shroud 5318 may extend completely beyond the channel 5326. Liquid leaving the outlet 5322 may be guided by the shroud 5318 to the outside of the channel 5326. In other words, the shroud 5318 may restrict the flow of liquid into the passage 5326 and may alternatively guide the liquid into the space surrounding the reservoir cavity 5112 of the column 5324.

[0368] In some forms, the channel 5326 may be open at both ends. For example, both the lowermost and uppermost portions of the column 5324 include openings leading to the channel 5326. The lowermost opening leading to the channel 5326 may extend through the bottom surface 5014 of the humidifier reservoir base 5007.

[0369] In some forms, at least one of the lowermost and uppermost openings of channel 5326 includes a rounded edge. For example, the lowermost opening of channel 5326 may include a rounded edge. In other words, the edge forming the transition between the bottom surface 5014 and channel 5326 may be rounded. In some examples, this can provide a smooth surface and facilitate the insertion of objects into channel 5326.

[0370] In some forms, at least one retention feature 5330 can be located at the bottom surface 5014 of the humidifier reservoir base 5007. The at least one retention feature 5330 can be a discrete element that is attached to the humidifier reservoir base 5007, or the at least one retention feature 5330 can be integrally formed with the humidifier reservoir base 5007. As shown, some forms of the humidifier reservoir base 5007 can include a pair of retention features 5330 (although any number of retention features 5330 can be used). In the illustrated example, the retention features 5330 are symmetrically spaced apart on the bottom surface 5014. For example, the retention features 5330 can be disposed on opposite sides of the channel 5326 (e.g., about 180° apart). The retention features 5330 can be radially outward of the channel 5326 so as not to block or obstruct the channel 5326. Figure 5K

[0371] In some forms, the pair of retention features 5330 can be magnets, or be composed of a magnetic material. As will be discussed below, the features 5330 can be used to lock or otherwise removably secure the humidifier reservoir base 5007 to a housing or humidifier reservoir base 5130.

[0372] 5.6.2.2 Conductive portion

[0373] According to one arrangement, the reservoir 5110 can include a thermally conductive portion 5120 that is configured to allow efficient transfer of heat from the external heating element 5240 to the volume of liquid in the reservoir 5110. In one form, the conductive portion 5120 can be arranged as a plate, although other shapes can be equally suitable. All or a portion of the conductive portion 5120 can be made of a thermally conductive material, such as aluminum (e.g., about 2 mm thick, such as about 1 mm, about 1.5 mm, about 2.5 mm, or about 3 mm), another thermally conductive metal, or some plastics. In some cases, a material with lower conductivity can be used with an appropriate geometry to achieve suitable thermal conductivity.

[0374] In some forms, the water reservoir 5110 can not include a conductive portion that is heated by an external heating element. Instead, the heating element 5240 can be internally coupled to the water reservoir 5110. In particular, the base or walls of the humidifier reservoir base 5007 of the water reservoir 5110 include the heating element 5240 such that the liquid in the water reservoir 5110 can be directly heated by the humidifier reservoir base 5007. In one example, the heating element 5240 can include a heating wire or an internally molded printed circuit board (PCB) that is integrated into an interior surface (the bottom surface 5014 or the outer lateral surface 5009) of the humidifier reservoir base 5007.

[0375] ​For this purpose, the water reservoir 5110 may include a conductive portion 5334, which may be electrically connected to the heating element and may be arranged to electrically connect with a corresponding conductive portion 5336 of the humidifier reservoir base 5130 when the water reservoir 5110 is engaged with the humidifier reservoir base 5130. The connection between these conductive portions 5334, 5336 may power the heating element 5240. This connection may also be used to transmit signals from any sensors within the water reservoir 5110 to a controller located at the humidifier reservoir base 5130. In some cases, sensor signals may further be transmitted from the humidifier reservoir base 5130 to the RPT device 4000.

[0376] like Figure 5K As shown, some forms of the water reservoir 5110 may include a conductive portion 5334 on the bottom surface 5014 of the humidifier reservoir base 5007. A wire may extend through the material of the base 5007 between the heating element 5240 and the conductive portion 5334. In other forms, the conductive portion 5334 may be disposed on another surface of the humidifier reservoir base 5007 (e.g., the outer surface 5009).

[0377] In some forms, the conductive portion 5334 may extend around a portion of the periphery of the humidifier reservoir base 5007. In other words, the conductive portion 5334 may be asymmetrically disposed on the humidifier reservoir base 5007.

[0378] In some configurations, a conductive portion 5334 may be used to aid in positioning the reservoir 5110 within the humidifier reservoir base 5130. For example, asymmetrical positioning of the conductive portion 5334 means that the reservoir 5110 may have only one orientation relative to the humidifier reservoir base 5130, which will complete the electrical connection. This can help the patient correctly orient the reservoir 5110, which would otherwise be symmetrical and / or difficult to discern its correct orientation (e.g., in the dark).

[0379] In some forms, the conductive portion 5334 may be spaced apart from the retaining features 5330 of the humidification reservoir 5110. In the example shown, the conductive portion 5334 may be separated from each first retaining feature 5330 by approximately 90°.

[0380] In some forms, the conductive portion 5334 may include an electrical pad arranged such that the conductive portion 5336 can be connected to the conductive portion 5334, while the retaining feature 5330 of the humidification reservoir 5110 is engaged (e.g., the electrical pad may extend from the bottom surface 5014 a distance similar to that of the retaining feature 5330).

[0381] 5.6.2.3 Humidifier reservoir base

[0382] In some forms, the humidifier 5000 can include a humidifier reservoir base 5130 configured to receive the humidifier reservoir 5110 (see, for example, Figure 5B and 5L ).

[0383] In some arrangements (see, for example, Figure 5B ), the humidifier reservoir base 5130 can include a locking feature, such as a locking lever 5135, configured to retain the reservoir 5110 in the humidifier reservoir base 5130. The locking lever 5135 can be exposed when the humidifier reservoir base 5130 receives the humidifier reservoir 5110. The locking lever 5135 can restrict the humidifier reservoir 5110 from moving out of the humidifier reservoir base 5130 in a superior and / or lateral (e.g., left / right) direction. A user can activate the locking lever 5135 (e.g., by pressing downward) in order to enable the humidifier reservoir 5110 to move out of the humidifier reservoir base 5130. The locking lever 5135 can be biased to a locked position (e.g., a position that restricts movement of the humidifier reservoir 5110), so a patient can need two hands to remove the humidifier reservoir 5110 (e.g., one hand to hold the locking lever 5135 in an unlocked position and one hand to remove the humidifier reservoir 5110).

[0384] In some forms, as best shown in Figure 5L , the humidifier reservoir base 5130 can include a first compartment or device compartment 5132 and a second compartment or humidification compartment 5134. The device and humidification compartments 5132, 5134 can be separated and / or isolated from each other by a central wall 5136. In the illustrated example, the device and humidification compartments 5132, 5134 are formed entirely within the humidifier reservoir base 5130. In other words, the entire perimeter of each compartment 5132, 5134 is entirely within the volume of the humidifier reservoir base 5130. The device and humidification compartments 5132, 5134 can be at least partially recessed within the humidifier reservoir base 5130 (e.g., the bottom surface of each compartment 5132, 5134 is lower than the central wall 5136). Both the RPT device 4000 and the humidifier reservoir 5110 are at least partially exposed (e.g., at least part of the surface is not within the respective compartment 5132, 5134 and is covered by the humidifier reservoir base 5130) when inserted into the respective compartment 5132, 5134. In other words, the length of the RPT device 4000 and / or the length of the humidifier reservoir 5110 can be greater than the depth of the respective compartment 5132, 5134. This can facilitate removal of the RPT device 4000 and / or the medicament reservoir 51100 as the patient is always exposed to a surface to grasp (e.g., with one hand).

[0385] The RPT device 4000 can have a length that extends substantially parallel to the RPT insertion axis 5137 for positioning the RPT device 4000 into the device compartment 5132 (see, for example, Figure 5.6.2.1.1). Figure 5O When the humidifier reservoir dock system is in the operational configuration, both the RPT insertion axis 5137 and the RPT device 4000 are oriented vertically. Thus, in this case, the length of the RPT device can also be referred to as the "height". In some examples, when the RPT device 4000 is inserted into the device compartment 5132, about 25% to about 90% of the length of the RPT device 4000 can be exposed. In some examples, when the RPT device 4000 is inserted into the device compartment 5132, about 40% to about 80% of the length of the RPT device 4000 can be exposed. In some examples, when the RPT device 4000 is inserted into the device compartment 5132, about 50% to about 75% of the length of the RPT device 4000 can be exposed. In some examples, when the RPT device 4000 is inserted into the device compartment 5132, about 66% of the length of the RPT device 4000 can be exposed.

[0386] The humidifier reservoir 5110 can have a length (also a height) that extends in the operational configuration also vertically and parallel to the reservoir insertion axis 5138 for positioning the humidifier reservoir 5110 into the humidification compartment 5134. In some examples, when the humidifier reservoir 5110 is inserted into the humidification compartment 5134, about 25% to about 90% of the length of the humidifier reservoir 5110 can be exposed. In some examples, when the humidifier reservoir 5110 is inserted into the humidification compartment 5134, about 40% to about 80% of the length of the humidifier reservoir 5110 can be exposed. In some examples, when the humidifier reservoir 5110 is inserted into the humidification compartment 5134, about 50% to about 75% of the length of the humidifier reservoir 5110 can be exposed. In some examples, when the humidifier reservoir 5110 is inserted into the humidification compartment 5134, about 66% of the length of the humidifier reservoir 5110 can be exposed.

[0387] In some forms, the device compartment 5132 and the humidification compartment 5134 have different shapes. For example, the device compartment 5132 can comprise a generally oval shaped opening, while the humidification compartment 5134 can comprise a generally rectangular shaped opening. The shapes of both compartments 5132, 5134 can have rounded corners. The different shapes can assist the patient in correctly identifying each compartment 5132, 5134 (e.g. in the dark). In some forms, the device compartment 5132 and the humidification compartment 5134 can also have different depths.

[0388] 5.6.2.3.1 Device compartment

[0389] In some forms, the shape of the device compartment 5132 (e.g., elliptical) can be asymmetrical. For example, an ellipse may have a larger radius on one side than on the other. This can help the patient correctly identify a particular side of the device compartment 5132.

[0390] In some configurations, the RPT device 4000 may be removably positioned within the device compartment 5132. As described above, the RPT device 4000 can operate without the humidifier 5000. In other words, the RPT device 4000 can deliver pressurized breathable air to a patient without being positioned within the device compartment 5132 (or otherwise connected to the humidifier reservoir base 5130). However, the RPT device 4000 may be positioned within the device compartment if a clinician prescribes it or if a patient desires pressurized breathable air from a humidifier.

[0391] In some forms, device compartment 5132 may include an opening to a first fluid conduit 5140. The opening to the first fluid conduit 5140 may be located at a position corresponding to an outlet on the RPT device (e.g., near the outlet air filter 4114). In other words, for alignment with the outlet of the RPT device 4000, the first fluid conduit 5140 may or may not be located at the center of device compartment 5132.

[0392] In some configurations, the first fluid conduit 5140 may receive a pressurized airflow from the RPT device 4000. For example, the first fluid conduit 5140 may receive dry, undried air from the RPT device 4000.

[0393] In some forms (see example) Figure 5P The first fluid conduit 5140 may extend toward the humidification compartment 5134 and may deliver a dry, undried airflow to the humidification compartment 5134. The first fluid conduit 5140 may fluidly connect the device compartment 5132 and the humidification compartment 5134 to each other.

[0394] In some forms, the RPT device 4000 can be portable and run on a battery (e.g. a rechargeable battery). The device compartment 5132 can include a charging connector 5142 that can connect with the RPT device 4000 when the RPT device 4000 is located within the device compartment 5132. The charging connector 5142 can provide power to recharge the battery of the RPT device 4000 and / or to power the motor of the RPT device 4000. The opening of the first fluid conduit 5140 and the charging connector 5142 can be arranged so that, when the RPT device 4000 is inserted into the device compartment 5132, the air outlet of the RPT device 4000 can pneumatically engage the opening of the first fluid conduit 5140 substantially simultaneously with the electro-mechanical engagement of the charging connector 5142 with the corresponding electrical connector of the RPT device 4000. Alternatively, the pneumatic engagement and the electro-mechanical engagement can be achieved in sequence. The charging connector 5142 can also help to support the RPT device 4000 in the device compartment 5132 in the correct orientation (e.g. so that the outlet of the RPT device 4000 is aligned with the opening of the first fluid conduit 5140). Thus, in addition to the shape of the device compartment 5132 and the location of the opening to the first fluid conduit 5140, the charging connector 5142 can also provide further guidance to the user regarding the correct alignment and orientation of the RPT device 4000 when the RPT device 4000 is inserted into the device compartment 5132. Specific alignment / guidance markings can also be provided on the device compartment 5132 and the RPT device 4000.

[0395] In some forms, the RPT device 4000 can be inserted into and / or removed from the device compartment 5132 using a single hand (see, for example Figure 5O ). The retention force between the RPT device 4000 and the device compartment 5132 (e.g. via the charging connector 5142) can be small so that a patient using a single hand can engage / disengage the RPT device 4000 with the device compartment 5132. This can help patients with arthritic pain to more easily remove and / or handle the RPT device 4000. Additionally, as discussed earlier herein, the depth of the device compartment 5132 is shallower than the height of the RPT device 4000 (see, for example Figure 5D ), so that a portion of the RPT device 4000 is exposed from the device compartment 5132, allowing the patient to conveniently grasp it.

[0396] Furthermore, while the partial insertion and electro-mechanical engagement between the electrical contacts does provide mechanical support for the RPT device when inserted within the device compartment 5132, the device compartment 5132 can include other mechanical features to support the engaged RPT device, such as recess and tongue engagement features, locking clips, etc.

[0397] 5.6.2.3.2 Humidification Compartment

[0398] In some forms, the shape of the humidification compartment 5134 (e.g., substantially rectangular) can be symmetrical. For example, the humidification compartment 5134 can have a circular or substantially square shape. Even when square, the humidification compartment 5134 can have rounded corners. The shape of the humidification compartment 5134 can thus be symmetrical about a plurality (e.g., four) of axes.

[0399] In some forms, the humidifier reservoir 5110 can be removably positioned within the humidification compartment 5134, which can have a shape that is complementary (e.g., substantially identical) to the humidification compartment 5134. Because the device compartment 5132 has a different shape than the humidification compartment 5134, the patient can be prevented from incorrectly inserting the humidifier reservoir 5110 into the device compartment 5132. The humidifier reservoir 5110 can be supported in the humidification compartment (e.g., in an upright (vertical) orientation) so as to limit spillage of liquid in the reservoir cavity 5112 (e.g., if the humidifier lid 5008 and / or cap 5308 are not properly sealed).

[0400] In some forms, the humidification compartment 5134 can include at least one retention feature 5338, which can be located at a lower surface 5146 (e.g., a recessed surface) of the humidification compartment 5134. The retention feature 5338 can engage a corresponding retention feature 5330 to lock or otherwise removably secure the humidifier reservoir base 5007 within the humidifier reservoir base 5130.

[0401] In some forms, the humidification compartment 5134 includes a pair of retention features 5338 (although any number of retention features 5338 can be used). In the illustrated example, the two retention features 5338 can be symmetrically spaced apart on the lower surface 5146. For example, the retention features 5338 of the humidification compartment 5134 can be arranged on opposite sides of the lower surface 5146 (e.g., separated by about 180°).

[0402] In some forms, the pairs of corresponding retention features 5330 and 5338 can be magnets, or constructed of magnetic material. Each of the pair of retention features 5338 can have an opposite polarity from its respective engaging retention feature 5330 so as to facilitate retention engagement. In terms of the polarity of each retention feature 5338 relative to one another, they can be selected to have opposite polarity from one another (e.g., one having a positive polarity and one having a negative polarity). In another form, all of the retention features 5338 have the same polarity (e.g., all positive or all negative).

[0403] In certain forms, the properties of the retention features 5330, 5338 of the humidification reservoir and the humidification compartment 5134, respectively, can be selected to perform more than one function. For example, the polarity of the retention features 5330, 5338 of the humidification reservoir 5110 and the humidification compartment 5134, respectively, can help the patient to correctly orient the humidifier reservoir 5110 within the humidification compartment 5134. For example, the retention features 5330 can include at least one magnet having a positive polarity and at least one magnet having a negative polarity. Similarly, the retention features 5338 can include at least one magnet having a positive polarity and at least one magnet having a negative polarity. Thus, the orientation in which the humidifier reservoir 5110 can be inserted into the humidification compartment 5134 can be limited (e.g., only a single orientation). For example, like polarities can repel each other, and the patient can feel the repulsion as a tactile response, which can alert them to an incorrect orientation. Additionally, the magnetic force can pull the retention features 5330 toward the retention features 5338 of the humidification compartment of opposite polarity, thereby guiding the patient toward the correct alignment. This can be especially useful when the patient is attempting to insert the humidifier reservoir 5110 into the humidification compartment 5134 in a low-visibility environment (e.g., in the dark). When the retention features 5330, 5338 are correctly aligned, the patient can feel a tactile response of the humidifier reservoir 5110 being pulled toward the lower surface 5146 (e.g., via magnetic attraction).

[0404] Additionally, if the patient orients the humidifier reservoir 5110 such that the retention features 5338 of the humidification compartment 5134 are not aligned with the retention features 5330 of the humidification container 5110, the lack of a tactile response (e.g., neither magnetic repulsion nor magnetic attraction) can alert the patient that the humidifier reservoir 5110 needs to be rotated (e.g., clockwise or counterclockwise) in order to correctly align the retention features 5330, 5338.

[0405] If each of the humidifier reservoir 5110 and the humidification compartment 5134 has a larger number of magnets (e.g., four magnets), the alignment / guiding function of the magnetic retention features 5330 and 5338 is further expanded. The magnets can be appropriately aligned (e.g., the four magnets can align with the four side walls of the humidifier reservoir 5110). If only one of the magnetic retention features 5330 of the humidifier reservoir 5110 has a different polarity (e.g., positive polarity) and only one of the magnetic retention features 5338 having the opposite polarity (in this case, negative polarity) is correspondingly located on the humidification compartment 5134 (e.g., and the remaining magnets are positive), this arrangement will be such that it will allow the humidifier reservoir 5110 to engage with the humidification compartment 5134 in only a single (e.g., correct) orientation. In this case, it can be said that the magnets have not only a locking function, but also a guiding function.

[0406] As Figure 5LAs shown, the alignment / guiding function can be further extended by positioning the magnetic retaining feature 5338 not at the bottom, but around the top opening (not shown) of the compartment 5134. In this way, during the initial engagement between the humidifier reservoir 5110 and the humidification compartment 5134, the magnetic retaining feature 5338 will be close to the bottom of the humidifier reservoir 5110. This allows the magnets of the two components to interact very early in the engagement and indicates to the user that this is the correct orientation for engagement. This can be used as a puncture-resistant yoke feature to prevent the humidifier reservoir 5110 from engaging in incorrect orientation relative to the humidification compartment 5134. Alternatively, mechanically based spring yoke features (such as tongues and grooves) or a cross-section using an asymmetrical shape of the humidifier reservoir 5110 can be used.

[0407] Therefore, retaining features 5330 and 5338 also facilitate the alignment of the humidifier reservoir 5110 and the humidification compartment 5134. On the other hand, if all retaining features 5330 and / or 5338 have the same polarity (e.g., all positive or all negative), the barrel can be placed in any orientation and still engage the magnet.

[0408] In some forms, the conductive portion 5336 may be disposed on the lower surface 5146. The conductive portion 5336 may be located between a pair of retaining features 5338 at approximately the same interval as that between the conductive portion 5334 and the retaining feature 5330 (e.g., separated by approximately 90°). The conductive portion 5336 may be oriented to be polarity aligned with the retaining feature 5338, such that only one orientation is required for the humidifier reservoir 5110 to be inserted into the humidification compartment 5134 for suitable mechanical connection (e.g., via magnetic force) and electrical connection (e.g., via contact between the conductive portions 5334, 5336).

[0409] In some forms, the magnetic force between retention features 5330, 5338 can be relatively low. For example, the humidifier reservoir 5110 can be separated from the humidification compartment 5134 relatively easily. This can help patients with certain ailments (e.g., arthritis) to grasp and remove the humidifier reservoir 5110 with one hand.

[0410] Replace or exclude the bottom of the humidifier reservoir base 5007 and the humidification compartment 5134 (see, for example) Figure 5L (and its corresponding discussion below), retention features 5330 and 5338 may also be located on the respective outer surfaces 5009 of the humidifier reservoir base 5007 and the humidification compartment 5134. Positioning one or more retention features 5330 on one or more outer surfaces 5009 of the stepped surface 5300 closer to the humidifier reservoir 5110 can provide faster engagement.

[0411] Components 5330 and 5338 (as a supplement to or alternative to the retaining components) may also be used to assist the user in positioning / orienting the humidifier reservoir 5110 when inserting it into the humidifier reservoir base 5130. For this purpose, features 5330 and 5338 may be arranged in an asymmetrical orientation to limit the number of orientations in which the humidifier reservoir 5110 can be properly inserted into the humidification compartment 5134 and in an operational configuration. In some forms, the humidifier reservoir 5110 may have a single orientation that achieves the operational configuration. Additionally, positioning one or more retaining features 5330 on one or more outer surfaces 5009 (as described above) may allow for larger retaining features 5330 and provide stronger tactile feedback.

[0412] like Figure 5O and 5P As shown, the humidifier reservoir base 5130 may include a second fluid conduit 5144 extending between the humidification compartment 5134 and the humidifier outlet 5004. Thus, the first fluid conduit 5140 can deliver dry air from the RPT device 4000 in the device compartment to the humidification compartment 5134, and the second fluid conduit 5144 can deliver humidified air out of the humidification compartment 5134 and to the patient (i.e., via the humidifier outlet 5004).

[0413] like Figures 5L to 5O As shown, the humidification compartment 5134 may include a third fluid conduit 5148 that extends upward from the lower surface 5146 of the humidification compartment 5134 (in use). For example, the third fluid conduit 5148 may extend substantially perpendicular to the lower surface 5146. In other words, when the humidifier 5000 is in use, the third fluid conduit 5148 may extend substantially in a vertical direction. Additionally, the tip of the third fluid conduit 5148 may be one of the uppermost points on the humidifier reservoir base 5130.

[0414] In some configurations, the third fluid conduit 5148 may be positioned at the center of the humidification compartment 5134. In other words, the third fluid conduit 5148 may be concentric with the lower surface 5146 of the humidification compartment 5134.

[0415] In some forms, the third fluid conduit 5148 may have a generally symmetrical shape. For example, the third fluid conduit 5148 may be cylindrical or truncated conical. The third fluid conduit 5148 may also have a substantially the same external shape as the column 5324 of the humidifier reservoir 5110.

[0416] In some forms, a sealing member 5152 can be positioned on an outer surface of the third fluid conduit 5148 to pneumatically seal the humidifier reservoir 5110 when inserted. For example, the sealing member 5152 can be provided near the upper end of the third fluid conduit 5148. In the example shown, the sealing member 5152 is a thin (e.g. silicone) lip seal which requires a small force to achieve a seal. However, the sealing member can be another form, such as an O-ring of elastomeric material. The sealing member 5152 can comprise a compression seal whereby, when the channel 5326 is inserted into the third fluid conduit 5148, two opposing walls can cause the sealing member 5152 to compress, thereby forming a pneumatic seal between the channel 5326 and the third fluid conduit 5148. Alternatively, the sealing member 5152 can comprise a lip seal whereby the seal comprises a relatively thin wall which is arranged such that pressure within the humidifier reservoir 5110 acts on a surface of the wall to further press the wall into its sealing configuration and to strengthen the seal.

[0417] In some forms, the sealing member can limit or prevent the flow of fluid (e.g. pressurised air) through the channel 5326 when the third fluid conduit 5148 is inserted into the channel 5326.

[0418] The upright configuration of the humidifier reservoir dock 5130 allows the conduits 5140 and 5148 to be removed from the humidifier reservoir 5110 and inserted into the base of the humidifier reservoir dock 5130, but not on the side. This can simplify the manufacture of the humidifier reservoir 5110, reduce the number of seals used (compared to some prior art RPT devices), reduce costs and improve the overall aesthetics of the system as a whole.

[0419] On insertion of the humidifier reservoir 5110 into the compartment 5134, a number of engagements occur, including; a full mechanical support engagement (relating to the support engagement between the inner side wall of the humidification compartment 5134 and the outer surface 5009 of the humidifier reservoir 5110), a magnetic support engagement (achieved by the engagement of the magnetic retaining portions 5330 and 5338), a pneumatic seal engagement (at the sealing member 5152) and an electrical coupling between the electrically conductive portions 5334 and 5336. At least two or more of these engagements can be achieved substantially simultaneously. Alternatively, at least some of these engagements can occur in sequence, with one or more of the engagements being achieved at a different time to the remainder.

[0420] In some forms, the third fluid conduit 5148 may include a partition 5342, which may be shaped as a substantially flat plate. The partition 5342 may extend along the entire length of the third fluid conduit 5148. In some examples, the partition 5342 may extend upward beyond the third fluid conduit 5148. In other words, when in an operating configuration, the partition 5342 may extend above the opening leading to the third fluid conduit 5148 and may be the uppermost portion of the humidifier reservoir base 5130.

[0421] In some forms, the separator 5342 can divide the third fluid conduit 5148 into a first or inlet portion 5346 and a second or outlet portion 5350. Both the inlet portion 5346 and the outlet portion 5350 can be fluid conduits configured to deliver fluid.

[0422] In some forms, the separator 5342 can separate the inlet portion 5346 and the outlet portion 5350, making them substantially isolated from each other. For example, the fluid in the inlet portion 5346 can be isolated from the fluid in the second portion 5350, thereby restricting the mixing of fluids in either portion 5346 or 5350 within the third fluid conduit 5148.

[0423] In some forms, the separator 5342 can divide the third fluid conduit 5148 such that each portion 5346, 5350 has substantially the same volume. In other words, the separator 5342 can be arranged at the center of the third fluid conduit 5148, and the opening to each portion 5346, 5350 is substantially semi-circular.

[0424] In some forms, the retaining feature 5338 may be located radially outside the third fluid conduit 5148 and may not obstruct or block the third fluid conduit 5148. Similarly, the conductive portion 5336 may also be located radially outside the third fluid conduit 5148.

[0425] like Figure 5P and 5Q As shown, the third fluid conduit 5148 can be in fluid communication with the first fluid conduit 5140 and the second fluid conduit 5144. For example, fluid from the first fluid conduit 5140 can be delivered to the inlet portion 5346, while fluid from the second portion 5350 can be delivered to the second fluid conduit 5144. Thus, the inlet portion 5346 can deliver fluid upwards, while the second portion 5350 can deliver fluid downwards.

[0426] 5.6.2.4 Water level indicator

[0427] Humidifier reservoir 5110 may include, for example Figures 5A-5BAn example water level indicator 5150 is shown. In some forms, the water level indicator 5150 can provide one or more indications to a user (such as the patient 1000 or a carer) regarding the amount of water volume in the humidifier reservoir 5110. The one or more indications provided by the water level indicator 5150 can include an indication of the maximum predetermined capacity of water, any portion thereof such as 25%, 50%, 75% or a capacity such as 200ml, 300ml or 400ml.

[0428] In some forms, the water level indicator 5150 can be below the maximum height of the column 5324. In other words, when the humidifier reservoir 5110 is in its operational vertical orientation, the water level indicator 5150 is below the uppermost entrance of the channel 5326. In this way, the maximum liquid level in the reservoir 5110 will not cause liquid to enter the channel 5326.

[0429] 5.6.2.5 Humidifier Transducers

[0430] The humidifier 5000 can include one or more humidifier transducers (sensors) 5210 in addition to or instead of the transducer 4270 described above. The humidifier transducers 5210 can include one or more air pressure transducers or sensors 5212, air flow sensors 5214, temperature sensors 5216 or humidity sensors 5218, as shown. Figure 5C The humidifier transducers 5210 can generate one or more output signals that can be communicated to a controller, such as the central controller and / or the humidifier controller 5250. In some forms, the humidifier transducers can be externally provided to the humidifier 5000 (such as in the air circuit 4170) when communicating the output signals to the controller.

[0431] 5.6.2.5.1 Pressure Transducers

[0432] In addition to or instead of the pressure sensors provided in the RPT device 4000, the humidifier 5000 can be provided with one or more pressure transducers 5212.

[0433] 5.6.2.5.2 Flow Transducers

[0434] In addition to or instead of the flow sensors provided in the RPT device 4000, the humidifier 5000 can be provided with one or more flow transducers 5214.

[0435] 5.6.2.5.3 Temperature Transducers

[0436] The humidifier 5000 can include one or more temperature transducers 5216. The one or more temperature transducers 5216 can be configured to measure one or more temperatures, such as the temperature of the heating element 5240 and / or the temperature of the air stream downstream of the humidifier outlet 5004. In some forms, the humidifier 5000 can further include a temperature sensor 5216 for detecting the temperature of ambient air.

[0437] 5.6.2.5.4 Humidity transducer

[0438] In some forms, the humidifier 5000 can include one or more humidity sensors 5218 that detect the humidity of a gas, such as ambient air. In some forms, the humidity sensor 5218 can be disposed towards the humidifier outlet 5004 to measure the humidity of the gas delivered from the humidifier 5000. The humidity sensor can be an absolute humidity sensor or a relative humidity sensor.

[0439] 5.6.2.6 Heating element

[0440] In some cases, the humidifier 5000 can be provided with a heating element 5240 to provide heat input to one or more of the volume of water in the humidifier reservoir 5110 and / or to the air stream. The heating element 5240 can comprise a heat-generating component, such as an electrically resistive heating track. One suitable example of a heating element 5240 is a laminar heating element, such as the laminar heating element described in PCT Patent Application Publication No. WO 2012 / 171072, which is incorporated herein in its entirety by reference.

[0441] In some forms, the heating element 5240 can be provided in the humidifier reservoir base 5007, where it can provide heat to the humidifier reservoir 5110 primarily by conduction, as shown in Figure 5B

[0442] As shown in Figure 5H some forms, the humidifier 5000 can include a heating element 5240 within the water reservoir 5110, to provide heat directly to the fluid in the water reservoir 5110.

[0443] In some forms, the heating element 5240 is disposed within the humidifier reservoir base 5007 and can be coupled to the walls (e.g., the inner surface 5010, the inner bottom wall 5114 Figure 5Q ​) etc. For example, the heating element 5240 can be molded into the wall of the humidifier reservoir base 5007. The heating element 5240 can or can not be in direct contact with the fluid within the water reservoir 5110 (e.g., the heating element 5240 can be between the outer surface 5009 and the inner surface 5010). The material used to construct the walls of the water reservoir 5110 can have a relatively high thermal conductivity in order to more efficiently conduct heat through the inner surface 5010 of the humidifier reservoir base 5007.

[0444] In some forms, the heating element 5240 can be coupled to the wall of the humidifier reservoir base 5007 and disposed within the water container 5110. In other words, the heating element 5240 can be coupled (e.g., via overmolding, adhesive, etc.) to the inner surface 5010 of the humidifier reservoir base 5007. Convective heat transfer can be the primary means of transferring heat from the heating element 5240 to the fluid in the water reservoir 5110. The humidifier reservoir base 5007 can be constructed from a material having a relatively low thermal conductivity (e.g., as compared to the examples described above) in order to increase the efficiency of the heating element 5240 (e.g., so that limited heat is lost through the humidifier reservoir base 5007 rather than convectively to the fluid).

[0445] In certain forms, the heating element 5240 can extend only around a portion of the perimeter of the humidifier reservoir base 5007, or at least partially around the channel 5326 on the bottom surface 5014 in order to minimize any heat discomfort when the user is holding the water container 5110. In examples where the humidifier reservoir base 5007 is constructed from a high thermal conductivity, positioning the heating element 5240 only around a portion of the perimeter can limit a portion of the humidifier reservoir base 5007 from becoming too hot for a patient to touch.

[0446] In some forms, an electrical wire, flexible printed circuit (FPC), or other conductor arrangement can extend through the wall of the humidifier reservoir base 5007 in order to reach the conductive portion 5334. Thus, the heating element 5240 can be electrically connected to the conductive portion 5334 and can receive electrical energy when the conductive portion 5334 contacts the conductive portion 5336.

[0447] 5.6.2.7 Humidifier Controller

[0448] According to one arrangement of the present technology, the humidifier 5000 can include a humidifier controller 5250 as shown in Figure 5C In one form, the humidifier controller 5250 can be part of the central controller. In another form, the humidifier controller 5250 can be a standalone controller that can communicate with the central controller.

[0449] In one form, the humidifier controller 5250 can receive, for example, measurements of the properties of the air flow, water in the reservoir 5110 and / or the humidifier 5000, such as temperature, humidity, pressure and / or flow rate, as inputs. The humidifier controller 5250 can also be configured to execute or implement a humidifier algorithm and / or deliver one or more output signals.

[0450] As shown in FIG. 52, the humidifier controller 5250 can include one or more controllers, such as a central humidifier controller 5251, a heated air circuit controller 5254 configured to control the temperature of the heated air circuit 4171, and / or a heating element controller 5252 configured to control the temperature of the heating element 5240. Figure 5C

[0451] 5.6.2.8 Humidifier operation

[0452] As previously described, the patient can insert the RPT device 4000 and the humidifier reservoir 5110 into the respective compartments 5132, 5134. The RPT device 4000 and the humidifier reservoir 5110 can each be inserted using a single hand. Furthermore, the insertion axes 5137, 5138 of the RPT device 4000 and the humidifier reservoir 5110 can be substantially parallel to each other and oriented substantially perpendicularly (perpendicular to a horizontal plane on which the humidifier reservoir base 5130 lies in its operational configuration).

[0453] In some forms, the humidifier reservoir 5110 can be inserted into the humidification compartment 5134 by inserting the third fluid conduit 5148 into the lower opening of the channel 5326. The channel 5326 can have a larger diameter than the third fluid conduit 5148, and the curved edges of the channel 5326 can assist the channel 5326 in receiving the third fluid conduit 5148.

[0454] In some forms, the frustoconical shape of the channel 5326 can cause the channel 5326 to narrow in the upward direction. The narrowing diameter of the channel 5326 can cause the sealing member 5152 to frictionally engage the inner surface of the channel 5326 when the humidifier reservoir 5110 is fully inserted. For example, the sealing member 5152 can engage the channel near the upper opening of the channel 5326. The walls of the channel 5326 can cause the sealing member 5152 to compress, thereby forming a pneumatic seal. Once the humidifier lid 5008 is connected to the humidifier reservoir base 5007 (e.g., before or after the walls of the channel 5326 engage the sealing member 5152), the container cavity 5112 can be enclosed and / or pressurized throughout the volume of the humidifier 5000.

[0455] ​In some forms, the retention features 5330, 5338 can engage with each other as described above in order to guide the humidifier reservoir 5110 to the appropriate orientation and to hold the humidifier reservoir 5110 there once engaged. During operation, the retention force must be sufficient to hold the humidifier reservoir 5110 in place. Some of the forces that the retention force must overcome can include: repulsion forces generated when the RPT device is opened, compressed air passing through the humidifier reservoir 5110, operating pressure applied to the humidifier reservoir 5110 (especially the shroud 5318); repulsion forces applied by any pogo pins used in electrical contact between the humidifier reservoir 5110 and the humidifier reservoir base 5130, etc. However, if the engagement force between the retention features 5330, 5338 is sufficiently low, then a patient can relatively easily disengage the retention features 5330 from the retention features 5338 and hold the humidifier reservoir 5110 with one hand. Thus, the retention force between the retention features 5330, 5338 (e.g., the power of the magnets that can be used as such retention features) can provide a calibrated engagement force that provides the necessary support for the humidifier reservoir 5110 while still in the engaged configuration, while also helping a patient with conditions like arthritis to easily remove the humidifier reservoir 5110 from the humidifier reservoir base 5130 (e.g., in order to clean the different pieces). Similar calibrated retention features, although not strictly necessary and not shown in the drawings, can also be used to retain the RPT device 4000 in its device compartment 5132.

[0456] The RPT device and the humidifier reservoir 5110 are held in a substantially vertical orientation and move up-down during insertion or removal of the respective compartments 5132, 5134. Once inserted, the humidifier reservoir 5110 can be held upright (e.g., oriented in the up-down direction) by its engagement with the compartment 5134 and the third fluid conduit 5148. In other words, when the third fluid conduit 5148 is received within the channel 5326, the humidifier reservoir 5110 is constrained from pivoting toward the support surface (e.g., about a horizontal axis toward the table) because the third fluid conduit 5148 substantially fills the channel 5326.

[0457] In some forms, the third fluid conduit 5148 can extend further into the channel 5326 than the upper opening after full insertion into the channel 5326. Additionally, the partition 5342 also extends further into the channel 5326 than the upper opening.

[0458] In certain forms, the partition 5342 can be adjacent to the shroud 5318. As Figure 5QAs shown, the uppermost point of the partition 5342 is positioned adjacent to the shroud 5318, and the shroud 5318 has a positive dome shape relative to the partition 5342. In other forms, the partition 5342 can contact the shroud 5318.

[0459] In use, the RPT device 4000 can generate a pressurised flow of breathable gas, and can deliver this gas to the inlet of the first fluid conduit 5140. The first fluid conduit 5140 can be in communication with the humidification chamber 5134, and can deliver the gas from the device chamber 5132 towards the humidification chamber 5134. The partition 5342 can prevent fluid from entering the second portion 5350, and instead can direct the fluid into the inlet portion 5346 of the third fluid conduit 5148. The gas can travel in an upward direction through the inlet portion 5346, and can exit the third fluid conduit 5148 proximate to the shroud 5318. The partition 5342 can restrict the gas from immediately exiting the reservoir cavity 5112 (e.g. through the second portion 5350), and can instead direct the gas to contact the shroud 5318. The curved portion of the shroud 5318 can direct the gas towards the bottom of the humidifier reservoir base 5007 (e.g. towards the heated liquid), where moisture can be added to the gas. There can be a low pressure at the inlet of the second portion 5350, and the now humidified gas can exit the reservoir cavity 5112 through the second portion 5350. The positive pressure in the partition 5342 and the inlet portion 5346 can prevent the humidified air in the second portion 5350 from returning to the reservoir cavity 5112 through the inlet portion 5346. The second portion can deliver the humidified air to the second fluid conduit 5144, which in turn can deliver the humidified air to the humidifier outlet 5004. The air circuit 4170 and the conduits of the patient interface 3000 can be used to deliver the humidified gas to the patient.

[0460] In some forms, the humidifier outlet 5004 can be provided on any of the side surfaces of the humidifier reservoir base 5130. The pressurised flow of breathable gas can exit the humidifier outlet 5004 in a direction that is substantially perpendicular to the axis of insertion of the RPT device 4000 and the humidifier reservoir 5110. Furthermore, as the humidifier outlet 5004 is perpendicular to the structure (e.g. table, nightstand, etc.) that supports the humidifier 5000, a decoupling structure (such as an elbow) can not be required. Alternatively, the humidifier outlet 5004 can be provided on the top surface of the humidifier reservoir base 5130.

[0461] The shape, size and vertical orientation of the RPT device 400 and the water reservoir 5110 has several positive impacts on the ability of the patient to handle the water reservoir 5110. Firstly, the cross-sectional size of the water reservoir 5110 can be made more comfortable to hold if the palms of the user are not required to be overly stretched. At the same time, it can be believed that the handling of the water reservoir 5110, such as a handle or a pocket (such as a handle or pocket) is easier for the user as it requires less dexterity and wrist bending / twisting. This is believed to be particularly applicable to older users whose wrist movements are often affected by arthritic pain. Furthermore, the fact that the RPT device 4000 and the water reservoir 5110 are inserted / extracted in the vertical orientation into / from the humidifier reservoir base 5130 can reduce the overall friction of each of these components with the humidifier reservoir base 5130. This is combined with the fact that gravity is used to hold the humidifier reservoir base 5130 in place during extraction, which also facilitates the easy one-handed operation of the water reservoir 5110.

[0462] It is envisaged that the system can be such that only one of the RPT device 400 and the water reservoir 5110 can be arranged for vertical insertion and extraction. For example, in some arrangements only the water reservoir 5110 can be arranged for vertical insertion and extraction.

[0463] 5.7 Aspects of the invention

[0464] The technology can also be described by the following list of aspects:

[0465] A1. A humidifier base for humidifying a pressurised flow of breathable gas to be delivered to a patient, the humidifier base comprising: a device compartment configured to at least partially removably receive an RPT device configured to supply the pressurised flow of breathable gas, and a humidification compartment fluidly connected to the device compartment; wherein the humidification compartment is configured to at least partially removably receive a humidification tub, the arrangement being such that at least one of the RPT device and the humidification tub is received within the base in a vertical orientation.

[0466] A2. The humidification base according to aspect Al, the base further comprising a humidification tub configured to contain a supply of water and removably at least partially received in the humidification compartment, such that in an operational configuration the humidification tub is arranged to receive the pressurised flow of breathable gas and output a pressurised flow of breathable gas having increased humidity.

[0467] A3. The humidifier base according to any one of aspects Al to A2, wherein the humidification compartment comprises a humidification compartment depth; the humidification tub comprises a tub length; wherein, in use, the humidification tub is configured to be engageable with the humidification compartment along a vertical insertion axis, such that the humidification compartment depth and the tub length are measured parallel to the insertion axis, wherein the tub length is greater than the humidification compartment depth, such that when the humidification tub is fully engaged, an upper portion of the humidification tub extends above the humidification compartment so as to be accessible for handling by a patient.

[0468] A4. The humidifier base according to aspect A3, wherein the tub length is greater than the humidification compartment depth by about 25% to about 90%.

[0469] A5. The humidification base according to aspect A4, wherein the tub length is greater than the humidification compartment depth by about 66%.

[0470] A6. The humidifier base according to any one of aspects Al to A5, wherein the humidification compartment comprises a fluid passage extending along the insertion axis.

[0471] A7. The humidifier base according to aspect A6, wherein the humidification tub comprises a passage configured to at least partially receive the fluid passage, in use.

[0472] A8. The humidifier base according to any one of aspects Al to A7, wherein the base further comprises a humidification compartment retention feature disposed within the humidification compartment; the humidification tub further comprises a humidification reservoir retention feature located outside the cavity of the humidification tub, the humidification reservoir retention feature configured to removably engage with the humidification compartment retention feature.

[0473] A9. The humidification base according to aspect A8, wherein the humidification tub is configured to be guided into an engaged position by interaction between the humidification compartment retention feature and the humidification reservoir retention feature.

[0474] A10. The humidifier base according to any one of aspects A8 to A9, wherein each of the humidification compartment retention feature and the humidification reservoir retention feature comprises one or more magnets.

[0475] A11. The humidifier base according to any one of aspects Al to A10, further comprising a heater secured to the humidification tub and configured to heat the supply of water.

[0476] A12. The humidifier base according to aspect Al l, wherein the heater is overmoulded to the humidification tub.

[0477] A13. The humidifier base according to any one of aspects Al to A12, wherein the humidification tub comprises a base and a lid configured to selectively engage the base, the lid being removable from the base when the humidification tub is positioned within the humidification compartment.

[0478] A14. A medical device comprising a humidifier base according to any one of aspects Al to A13; an RPT device having an RPT device length and configured to supply a pressurised flow of breathable gas, the RPT device being removably positionable within the device compartment; a patient interface configured to seal against an airway of a patient and to deliver the pressurised flow of breathable gas having increased humidity to the airway of the patient; and a conduit arranged to fluidly connect the humidifier outlet to the patient interface for the conveyance of the pressurised flow of breathable gas from the humidifier to the patient interface.

[0479] A15. The medical device according to aspect A14, when including any one of aspects A3 to A13, wherein the device compartment is arranged to receive the RPT device in a direction parallel to the insertion axis, such that a device compartment depth and the RPT device length are measured parallel to the insertion axis, the RPT device length being greater than the device compartment depth, such that a portion of the RPT device is exposed to enable manipulation by a user.

[0480] A16. The medical device according to any one of aspects A14 to A15, when including any one of aspects A3 to A13, wherein the conduit is connected to the base in a direction substantially perpendicular to the insertion axis.

[0481] B1. A system for humidifying a pressurised flow of breathable gas to be delivered to a patient to ameliorate a respiratory disorder, the system comprising: a base comprising: a device compartment comprising a device compartment bottom surface and a device compartment sidewall, and a humidification compartment fluidly connected to the device compartment, the humidification compartment comprising a humidification compartment bottom surface and a humidification compartment sidewall; an RPT device configured to supply the pressurised flow of breathable gas, the RPT device being removably positionable within the device compartment of the base, wherein the device compartment sidewall extends partially along the RPT device when the RPT device is positioned within the device compartment; and a humidification tub configured to contain a water supply and being at least partially removably received in the humidification compartment, such that in an operational configuration the humidification tub is arranged to receive the pressurised flow of breathable gas and output the pressurised flow of breathable gas having increased humidity, wherein the device compartment sidewall extends partially along the humidification tub when the humidification tub is positioned within the device compartment; wherein the RPT device is at least partially exposed from the device compartment in an operational position; and wherein the humidification tub is at least partially exposed from the humidification compartment in an operational position.

[0482] B2. The system according to aspect B1, wherein the humidification compartment is spaced apart from the device compartment such that the device compartment side wall is separated from the humidification compartment side wall.

[0483] B3. The system according to any one of aspects B1 to B2, wherein the device compartment side wall is oriented perpendicularly relative to the device compartment bottom surface.

[0484] B4. The system according to any one of aspects B1 to B3, wherein the humidification compartment side wall is oriented perpendicularly relative to the humidification compartment bottom surface.

[0485] B5. The system according to any one of aspects B1 to B4, wherein the device compartment side wall is at least partially curved.

[0486] B6. The system according to any one of aspects B1 to B5, wherein the humidification compartment side wall is at least partially curved.

[0487] B7. The system according to any one of aspects B1 to B6, wherein the humidification tub is arranged to engage and disengage the base along a humidification tub insertion axis oriented substantially perpendicularly relative to the humidification compartment bottom surface.

[0488] B8. The system according to any one of aspects B1 to B7, wherein the RPT device is arranged to engage and disengage the base along an RPT device insertion axis oriented substantially perpendicularly relative to the device compartment bottom surface.

[0489] B9. The system according to any one of aspects B1 to B8, wherein the RPT device and the humidification tub are configured to be inserted into the base along parallel axes.

[0490] B10. The system according to any one of aspects B1 to B9, wherein: the humidification compartment further comprises a humidification compartment retention feature; the humidification tub further comprises a humidification reservoir retention feature configured to reversibly engage with the humidification compartment retention feature; and the humidification tub is configured to be guided into and / or held in the operational configuration by suitable engagement between the humidification compartment retention feature and the humidification reservoir retention feature.

[0491] B11. The system according to aspect B10, wherein: the humidification compartment retention feature comprises a first magnet and a second magnet having an opposite polarity to the first magnet; the humidification reservoir retention feature comprises a first magnet and a second magnet having an opposite polarity to the first magnet; the humidification tub is configured to be guided into and / or held in the operational configuration by aligning the first magnet of the humidification compartment retention feature with the second magnet humidification reservoir retention feature, and by aligning the second magnet of the humidification compartment retention feature with the first magnet humidification reservoir retention feature.

[0492] B12. The system according to any one of aspects B1 to B11, wherein the humidification compartment further comprises a first electrically conductive portion and the humidification cartridge comprises a second electrically conductive portion configured to contact the first electrically conductive portion, wherein contact between the first electrically conductive portion and the second electrically conductive portion is configured to provide electrical energy to a heating element on the humidification cartridge.

[0493] B13. The system according to any one of aspects B1 to B12, wherein a fluid conduit extends from the humidification compartment bottom surface, the humidification cartridge comprising a channel configured to receive the fluid conduit when the humidification cartridge is received in the humidification compartment.

[0494] B14. The system according to any one of aspects B1 to B13, wherein the fluid conduit comprises a first channel and a second channel parallel to the first channel.

[0495] B15. The system according to any one of aspects B1 to B14, the base further comprising an outlet configured to output a pressurized flow of breathable gas having increased humidity, the outlet being perpendicular to the device compartment bottom surface and / or the humidification compartment bottom surface.

[0496] B16. The system according to aspect B15, further comprising: a patient interface configured to seal to a face of the patient and to deliver the pressurized flow of breathable gas having increased humidity to an airway of the patient; and a conduit arranged to fluidly connect the outlet to the patient interface so as to deliver the pressurized flow of breathable gas from the humidifier to the patient interface.

[0497] C1. A humidifier for humidifying a pressurized flow of breathable gas to be delivered to a patient, the humidifier comprising: a base comprising: a device compartment configured to at least partially removably receive an RPT device configured to supply a pressurized flow of breathable gas, a humidification compartment, an outlet, a first fluid conduit extending between the device compartment and the humidification compartment, the first fluid conduit configured to transport pressurized breathable gas from the device compartment to the humidification compartment, a second fluid conduit extending between the humidification compartment and the outlet, the second fluid conduit configured to transport pressurized breathable gas from the humidification compartment to the outlet, and a third fluid conduit in communication with the first fluid conduit and / or the second fluid conduit; a humidification cartridge configured to contain a supply of water and to be at least partially removably received in the humidification compartment such that, in an operational configuration, the humidification cartridge is arranged to receive the pressurized flow of breathable gas through the first fluid conduit and to output a pressurized flow of breathable gas having increased humidity through the second fluid conduit to the outlet; wherein the humidification cartridge comprises a channel configured to receive the third fluid conduit in the operational configuration.

[0498] C2. The humidifier of aspect CI, wherein the third fluid extends perpendicularly out of the humidification compartment.

[0499] C3. The humidifier of any one of aspects CI to C2, wherein the third fluid compartment includes a partition forming a first passageway configured to deliver the pressurized breathable gas flow from the first fluid conduit into the humidification tub, and a second passageway configured to deliver the pressurized breathable gas flow having increased humidity to the second fluid conduit.

[0500] C4. The humidifier of aspect C3, wherein the partition extends beyond an end of the third fluid conduit.

[0501] C5. The humidifier of any one of aspects CI to C4, wherein in the operational configuration, the third fluid conduit extends above the passageway.

[0502] C6. The humidifier of any one of aspects CI to C5, wherein at least one of the passageway and the third fluid conduit includes a frustoconical shape.

[0503] C7. The humidifier of any one of aspects CI to C6, wherein the outlet is oriented substantially perpendicularly relative to the third conduit.

[0504] C8. The humidifier of any one of aspects CI to C6, wherein the first fluid conduit extends substantially perpendicularly into the device compartment.

[0505] C9. The humidifier of any one of aspects CI to C8, wherein the device compartment includes a first side wall, and the humidification compartment includes a second side wall spaced apart from the first side wall.

[0506] C10. The humidifier of any one of aspects CI to C9, wherein the third fluid conduit extends in a different direction than the first fluid conduit and / or the second fluid conduit.

[0507] C11. The humidifier of any one of aspects CI to C10, wherein the first fluid conduit, the second fluid conduit, and the third fluid conduit are each spaced apart from one another.

[0508] C12. The humidifier of any one of aspects CI to C11, wherein the third fluid conduit is configured to block fluid flow through the passageway.

[0509] C13. A medical device comprising: a humidifier according to any one of aspects CI to C12; an RPT device configured to supply a pressurised flow of breathable gas, the RPT device being removably positionable within a device compartment of the humidifier; and a patient interface configured to seal the patient’s face and to deliver the pressurised flow of breathable gas with added humidity to the patient’s airways; and a conduit arranged to fluidly connect the outlet to the patient interface so as to deliver the pressurised flow of breathable gas from the humidifier to the patient interface.

[0510] C14. The medical device according to aspect C13, wherein: at least a portion of the RPT device is exposed and configured to be grasped by a patient when fully inserted into the device compartment; and at least a portion of the humidification chamber is exposed and configured to be grasped by a patient when fully inserted into the humidification compartment.

[0511] 5.8 Glossary

[0512] For the purposes of the present technology disclosure, in certain forms of the present technology one or more of the following definitions can apply. In other forms of the present technology alternative definitions can apply.

[0513] 5.8.1 Overview

[0514] Air: In certain forms of the present technology, air can be taken to mean atmospheric air, and in other forms of the present technology air can be taken to mean some other combination of breathable gases, for example oxygen enriched air.

[0515] Ambient: In certain forms of the present technology, the term ambient can have the following meanings (i) the exterior of the therapy system or patient, and (ii) the immediate surroundings of the therapy system or patient.

[0516] For example, the ambient humidity with respect to a humidifier can be the humidity of the air immediately surrounding the humidifier, for example the humidity in the room in which the patient is sleeping. Such ambient humidity can be different to the humidity outside the room in which the patient is sleeping.

[0517] In another example, ambient pressure can be the pressure immediately surrounding or outside the body.

[0518] In certain forms, ambient (e.g. acoustic) noise can be taken to be the background noise level in the room in which the patient is located, other than noise produced for example by the RPT device or from the mask or patient interface. Ambient noise can be produced by sound sources outside the room.

[0519] Automatic positive airway pressure (APAP) therapy: CPAP therapy in which the therapy pressure is automatically adjustable, for example from breath to breath, between minimum and maximum limits, depending on the presence or absence of indications of SDB events.

[0520] Continuous positive airway pressure (CPAP) therapy: Respiratory pressure therapy in which the therapy pressure is approximately constant throughout the patient's respiratory cycle. In some forms, the pressure at the entrance to the airways will be slightly higher during exhalation and slightly lower during inhalation. In some forms, the pressure will vary between different breath cycles of the patient, for example, increasing in response to detecting an indication of partial airway obstruction, and decreasing in the absence of an indication of partial airway obstruction.

[0521] Flow: The volume (or mass) of air delivered per unit of time. Flow can refer to an instantaneous quantity. In some cases, a reference to flow will be a reference to a scalar quantity, i.e. a quantity with only a magnitude. In other cases, a reference to flow will be a reference to a vector quantity, i.e. a quantity with both a magnitude and a direction. Flow can be assigned the symbol Q. "Flow" is sometimes shortened to simply "flow" or "airflow".

[0522] In the example of a patient breathing, flow can be nominally positive for the inhalation portion of the patient's respiratory cycle, and thus negative for the exhalation portion of the patient's respiratory cycle. Device flow Qdis the flow of air leaving the RPT device. Total flow Qtis the flow of air and any supplementary gases to the patient interface via the air circuit. Ventilation flow Qvis the flow of air exiting the vent to allow flushing of exhaled gases. Leak flow Qlis the flow of leaks from the patient interface system or elsewhere. Breathing flow (Qr) is the flow of air received into the patient's respiratory system.

[0523] Flow therapy: Respiratory therapy comprising the delivery of a flow of air to the entrance of the airways at a controlled flow referred to as a therapy flow, which is generally positive throughout the patient's respiratory cycle.

[0524] Humidifier: The word humidifier is to be understood as a humidification apparatus constructed and arranged, or constructed with a physical structure, capable of providing a therapeutically beneficial amount of water (H20) vapour to a flow of air to improve a patient's medical respiratory condition.

[0525] Leak: The word leak is to be understood as an undesirable flow of air. In one example, a leak can occur due to an imperfect seal between a mask and a patient's face. In another example, a leak to the environment can occur in a swivel elbow.

[0526] Noise, conducted (acoustic): Conducted noise in this document refers to noise brought to the patient through the pneumatic path, such as the air circuit and patient interface and the air therein. In one form, conducted noise can be quantified by measuring the sound pressure level at the end of the air circuit.

[0527] Noise, Radiated (acoustic): Radiated noise in this document refers to noise carried by the ambient air to the patient. In one form, radiated noise can be quantified by measuring the sound power / pressure level of the object in question according to ISO 3744.

[0528] Noise, Ventilation (acoustic): Ventilation noise in this document refers to noise produced by the flow of air through any vent (such as a vent hole of a patient interface).

[0529] Oxygen enriched air: Air with an oxygen concentration greater than atmospheric air (21%), for example at least about 50% oxygen, at least about 60% oxygen, at least about 70% oxygen, at least about 80% oxygen, at least about 90% oxygen, at least about 95% oxygen, at least about 98% oxygen, or at least about 99% oxygen. “Oxygen enriched air” is sometimes referred to simply as “oxygen”.

[0530] Medical oxygen: Medical oxygen is defined as oxygen enriched air with an oxygen concentration of 80% or more.

[0531] Patient: A human, whether or not they suffer from a respiratory disorder.

[0532] Pressure: Force per unit area. Pressure can be expressed in units ranging from cmH2O, g-f / cm 2 and hectopascal (hPa). 1 cmH2O is equal to 1 g-f / cm 2 and approximately 0.98 hPa (1 hPa = 100 Pa = 100 N / m 2 = 1 mbar ~ 0.001 atm). In this specification, pressure is given in units of cmH2O unless otherwise stated.

[0533] Pressure in a patient interface is given the symbol Pm, while the treatment pressure representing the target value achieved by the interface pressure Pm at the current instant of time is given the symbol Pt.

[0534] Respiratory pressure therapy: The application of a supply of air at a treatment pressure that is normally positive relative to atmosphere to the entrance of the airways.

[0535] Ventilator: A mechanical device that provides pressure support to a patient to perform some or all of the work of breathing.

[0536] 5.8.1.1 Materials

[0537] Silicone or silicone elastomer: Synthetic rubber. In this specification, reference to silicone refers to liquid silicone rubber (LSR) or compression molded silicone rubber (CMSR). One form of commercially available LSR is SILASTIC (including the range of products sold under this trademark) manufactured by Dow Corning. Another manufacturer of LSR is Wacker. Unless otherwise specified to the contrary, an exemplary form of LSR has a Shore A (or Type A) indentation hardness in the range of about 35 to about 45 as measured using ASTM D2240.

[0538] Polycarbonate: Thermoplastic polymer of bisphenol A carbonate.

[0539] Positive curvature: The curvature at a point p will take on a positive value if the curve turns away from the outward normal at that point (if an imaginary little person were to leave the point p, they would have to walk uphill). See Figure 3B (Compared to Figure 3C relatively large positive curvature) and Figure 3C (Compared to Figure 3B relatively small positive curvature). Such curves are often referred to as concave.

[0540] Zero curvature: The curvature will take on a value of zero if the curve at p is a straight line (if an imaginary little person were to leave the point p, they could walk horizontally, neither uphill nor downhill). See Figure 3D .

[0541] Negative curvature: The curvature at a point p will take on a negative value if the curve turns away from the outward normal in that direction at that point (if an imaginary little person were to leave the point p, they would have to walk downhill). See Figure 3E (Compared to Figure 3F relatively small negative curvature) and Figure 3F (Compared to Figure 3E relatively large negative curvature). Such curves are often referred to as convex.

[0542] 5.8.1.2 Curvature of a two-dimensional surface

[0543] The description of the shape at a given point on a two-dimensional surface according to the present technology can include a plurality of normal cross sections. The plurality of cross sections can cut the surface in a plane that includes the outward normal (the “normal plane”), and each cross section can be taken in a different direction. Each cross section produces a planar curve with a corresponding curvature. The different curvatures at the point can have the same sign or different signs. Each curvature at the point has a magnitude, e.g., a relatively small magnitude. Figures 3B to 3F The planar curves in FIG. 5.8.1.2.1 are examples of such a plurality of cross sections at a particular point.

[0544] Principal curvatures and directions: The normals to the curve curvature where it takes its maximum and minimum values are called the principal directions. In Figures 3B to 3F the example, the maximum curvature occurs in Figure 3B and the minimum curvature occurs in Figure 3F so Figure 3B and Figure 3F are cross sections in the principal directions. The principal curvature at p is the curvature in the principal direction.

[0545] Surface region: A connected set of points on a surface. The set of points in a region can have similar characteristics, e.g. curvature or sign.

[0546] Saddle region: A region where the principal curvatures have opposite signs at each point, i.e. one sign is positive and the other sign is negative (depending on the direction the imaginary individual turns, they can walk up or down).

[0547] Dome region: A region where the principal curvatures have the same sign at each point, e.g. both positive (“concave dome”) or both negative (“convex dome”).

[0548] Cylindrical region: A region where one principal curvature is zero (or zero within manufacturing tolerances, for example) and the other principal curvature is non-zero.

[0549] Planar region: A surface region where both principal curvatures are zero (or zero within manufacturing tolerances, for example).

[0550] Surface edge: The boundary or limit of a surface or region.

[0551] Path: In certain forms of the technology, a ‘path’ will mean a path in the mathematical-topological sense, e.g. a continuous space curve on a surface from f(0) to f(1). In certain forms of the technology, a ‘path’ can be described as a route or course, including for example a set of points on a surface. (The path of an imaginary individual is a path where they walk on the surface and is analogous to a garden path).

[0552] Path length: In certain forms of the technology, a ‘path length’ will be taken to mean the distance along a surface from f(0) to f(1), i.e. the distance along the path on the surface. There can be more than one path between two points on a surface and such paths can have different path lengths. (The path length of an imaginary individual will be the distance they walk along the path on the surface).

[0553] Straight-line distance: Straight-line distance is the distance between two points on a surface, but is independent of the surface. In a planar region, there can be a path on the surface that has the same path length as the straight-line distance between two points on the surface. In a non-planar surface, there can not be a path that has the same path length as the straight-line distance between two points. (For the imaginary person, straight-line distance will correspond to the distance as a'straight line'.

[0554] 5.9 Other Notes

[0555] A portion of the disclosure of this patent document contains material that is subject to copyright protection. The copyright owner has no objection to the facsimile reproduction by anyone of the patent document or the patent disclosure, as it appears in the Patent and Trademark Office patent file or records, but otherwise reserves all copyright rights whatsoever.

[0556] Unless otherwise expressly specified herein and where a numerical range is provided, it is to be understood that every integer within the range is expressly stated and well as any sub-range between any two integers. The upper and lower limits of these ranges can independently be included or excluded in the ranges, and the endpoints are also included in the ranges, unless indicated otherwise. Where the stated ranges include the endpoints, ranges excluding either or both of the endpoints are also included.

[0557] Further, where one or more values described herein are implemented as part of the technology, it should be understood that such values can be approximate, unless otherwise stated, and that such values can be implemented to the extent permitted by practical technology implementation, as can be required or desired.

[0558] Further, as used herein, "about", "substantially", "approximately", or any like term means + / - 5 to + / - 10% of the stated value.

[0559] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as is commonly understood by one of ordinary skill in the art to which this technology belongs. Although any methods and materials similar or equivalent to those described herein can be used in the practice or testing of the present technology, a limited number of the exemplary methods and materials are described herein.

[0560] Where a particular material is identified as being used to construct a component, obvious alternatives of similar properties can be used as a substitute. Further, unless specified to the contrary, any and all components described herein are understood to be capable of being manufactured and thus can be manufactured together or separately.

[0561] It must be noted that, as used herein and in the appended claims, the singular forms "a," "an," and "the" include their plural counterparts unless the context clearly dictates otherwise.

[0562] All publications mentioned herein are incorporated herein by reference in their entirety to disclose and describe the methods and / or materials which are the subject of those publications. The publications discussed herein are provided solely for their disclosure prior to the filing date of the present application. Nothing herein is to be construed as an admission that the present technology is not entitled to antedate such publications by virtue of prior application. Further, the dates of publication provided can be different from the dates which can be disclosed in the publications themselves that can need to be independently confirmed.

[0563] The terms "comprising" and "including" are to be construed as open-ended terms that refer to the inclusion of any element or step recited in a clause, but not precluding the addition of further elements or steps.

[0564] The subject matter headings used herein are for convenience only and are not to be construed as limiting the subject matter described in any way.

[0565] While the technology herein has been described with reference to particular examples, it is to be understood that the examples are illustrative only and not intended to limit the scope of the technology. In some instances, terms and notation can imply specific details that are not required in practice of the technology. For example, although the terms "first" and "second" can be used, they are not intended to indicate any order unless specified, but can be used to distinguish different elements. Also, although process steps in methods can be described or illustrated in sequence, such sequence is not required. Those skilled in the art will recognize that such sequence can be modified and / or aspects thereof can be performed concurrently or even synchronously.

[0566] Accordingly, it will be understood that numerous modifications can be made to the illustrative examples and that other arrangements can be devised without departing from the spirit and scope of engaging the technology.

[0567] 5.10 List of Reference Symbols

[0568]

[0569]

[0570]

Claims

1. A humidifier for humidifying a pressurized breathable gas stream to be delivered to a patient, the humidifier comprising: The base includes: A device compartment configured to at least partially removably receive an RPT device in a vertical direction, the RPT device being configured to supply the pressurized breathable gas flow, and A humidification compartment fluidly connected to the device compartment; A humidification tank, configured to contain a water supply and at least partially removably received in the humidification compartment along a vertical direction, such that in an operational configuration, the humidification tank is arranged to receive the pressurized breathable gas stream and output the pressurized breathable gas stream with increased humidity; and A heater is attached to the humidification tank and configured to heat the water supply.

2. The humidifier according to claim 1, wherein the humidification tank comprises: A tank base is arranged to be at least partially removably received in the humidification compartment, the tank base including a cavity configured to receive the water supply; and The lid is detachably connected to the barrel base; The heater is attached to the barrel base.

3. The humidifier according to claim 2, wherein the heater is overmolded into the inside of the barrel base.

4. The humidifier of claim 2, wherein the tank base includes an electrical connector configured to be electrically connected to an electrical connector disposed in the humidification compartment.

5. The humidifier of claim 2, wherein the bucket lid is detachably connected to the bucket base and configured for one-handed operation.

6. The humidifier according to claim 2, wherein the lid further comprises: Water may be used to fill the inlet of the barrel base; A cap that is detachably connected to the bucket lid to selectively cover the water inlet.

7. The humidifier of claim 6, wherein the humidification bucket is only partially housed within the humidification compartment such that the humidification bucket extends beyond the space defined by the humidification compartment, at least the bucket lid is exposed to the surrounding environment and is not covered by the base in use, and wherein the lid is removable, while the bucket base is at least partially positioned within the humidification compartment.

8. The humidifier of claim 6, wherein the lid includes a shield configured to be received within the cavity when the lid is coupled to the base of the container.

9. The humidifier of claim 8, wherein the shroud is spaced apart from the inlet and oriented in a negative dome shape relative to the inlet.

10. The humidifier of claim 8, wherein the base further comprises: An outlet is configured to deliver the pressurized breathable gas stream to the patient, the outlet being spaced apart from the device compartment and from the humidification compartment; A first fluid conduit extending between the device compartment and the humidification compartment, the first fluid conduit being configured to deliver pressurized breathable gas from the device compartment to the humidification compartment; as well as A second fluid conduit extending between the humidification compartment and the outlet, the second fluid conduit being configured to deliver pressurized breathable gas from the humidification compartment to the outlet.

11. The humidifier of claim 10, wherein the outlet is tubular and defines an axis oriented substantially perpendicular to the insertion axis of the humidification tank.

12. The humidifier of claim 10, wherein the humidification compartment includes a third fluid conduit in communication with the first fluid conduit and / or the second fluid conduit.

13. The humidifier of claim 12, wherein the tank base includes a channel configured to receive the third fluid conduit in the operating configuration, such that the channel and the third fluid conduit are coaxial.

14. The humidifier of claim 13, wherein in the operating configuration, the third fluid conduit extends above the channel.

15. The humidifier of claim 13, wherein at least one of the channel and the third fluid conduit comprises a truncated conical shape.

16. The humidifier of claim 12, wherein when the barrel cover is coupled to the barrel base in the operating configuration, the cover is positioned adjacent to the opening of the third fluid conduit.

17. The humidifier of claim 12, wherein the direction of the outlet is substantially perpendicular to the direction of the third fluid conduit.

18. The humidifier of claim 2, wherein the barrel base includes a barrel base opening configured to allow pressurized breathable gas to flow into and / or out of the cavity.

19. The humidifier of claim 13, wherein the third fluid conduit includes a separator dividing the third fluid conduit into an inlet portion and an outlet portion, the separator being configured to at least partially isolate the inlet portion from the outlet portion, and the shroud and the third fluid conduit being configured such that, when the humidification tank is in the operating configuration inside the humidification compartment, the shroud prevents water from entering the inlet portion and the outlet portion when water is poured into the cavity through the inlet.

20. The humidifier of claim 19, wherein the pressurized breathable gas flow is configured to enter the cavity through the inlet portion and the pressurized breathable gas flow is configured to exit the cavity through the outlet portion.

21. The humidifier of claim 20, wherein the separator is configured to extend over the channel at the opening of the barrel base.

22. The humidifier of claim 13, wherein the outer surface of the opening adjacent to the third fluid conduit includes a sealing member configured to engage the inner surface of the channel of the barrel base opening, the sealing member being configured to prevent pressurized breathable gas from flowing between the channel and the third fluid conduit.

23. The humidifier according to claim 22, wherein the sealing member is a silicone lip seal or an O-ring.

24. The humidifier according to claim 2, wherein: The base also includes a humidification compartment retention feature disposed within the humidification compartment. The humidification tank also includes a humidification reservoir retention feature located outside the cavity at the tank base and configured to reversibly engage the humidification compartment retention feature; and The humidification tank is configured to be guided into and / or maintained into the operating configuration by proper engagement between the humidification compartment retention features and the humidification reservoir retention features.

25. The humidifier of claim 24, wherein each of the humidification compartment retention feature and the humidification reservoir retention feature comprises one or more magnets, the one or more magnets being arranged such that the electromagnetic force between magnets of corresponding polarities allows engagement only in the operating configuration.

26. The humidifier of claim 25, wherein the humidification tank is configured to engage the humidification compartment via a magnetic connection and at least one additional connection selected from the group consisting of mechanical, electrical, and pneumatic connections, wherein the magnetic connection and the additional connection are configured to be implemented simultaneously.

27. The humidifier according to any one of the preceding claims, wherein the device compartment is configured to receive only a portion of the engaged RPT device, such that in the operating configuration, when the RPT device is fully positioned in the device compartment, the RPT device is at least partially exposed.

28. A medical device comprising: Humidifier according to any one of claims 1 to 27; The RPT device is configured to supply a pressurized breathable gas flow and is removably and positionable within the device compartment of the humidifier. The patient interface is configured to seal the patient's face and deliver a pressurized breathable gas stream with increased humidity to the patient's airway; and A catheter is arranged to fluidly connect the outlet of the base to the patient interface in order to deliver the pressurized breathable gas flow from the humidifier to the patient interface.

29. The medical device according to claim 28, wherein: When fully inserted into the device compartment, at least a portion of the RPT device is exposed and configured to be grasped by the patient; as well as When fully inserted into the humidification compartment, at least a portion of the humidification bucket is exposed and configured to be grasped by the patient.

30. A system for humidifying a pressurized breathable gas stream to be delivered to a patient to improve respiratory distress, the system comprising: The base includes: The device compartment includes the bottom surface of the device compartment and the side walls of the device compartment, and A humidification compartment fluidly connected to the device compartment, the humidification compartment including a bottom surface of the humidification compartment and a side wall of the humidification compartment; An RPT device, configured to supply the pressurized breathable gas flow, is removably and vertically positionable within the device compartment of the base, wherein when the RPT device is positioned within the device compartment, a sidewall of the device compartment extends partially along the RPT device; and A humidification tank is configured to contain a water supply and is at least partially removably received in the humidification compartment in a vertical direction, such that in an operating configuration, the humidification tank is arranged to receive the pressurized breathable gas stream and output the pressurized breathable gas stream with increased humidity, wherein when the humidification tank is positioned in the humidification compartment, the sidewall of the humidification compartment extends partially along the humidification tank; The RPT device is at least partially exposed from the device compartment in the operating position; and The humidification tank is at least partially exposed from the humidification compartment in the operating position.

31. A humidifier for humidifying a pressurized breathable gas stream to be delivered to a patient, the humidifier comprising: The base includes: A device compartment configured to at least partially removably receive an RPT device in a vertical direction, the RPT device being configured to supply the pressurized breathable gas flow. humidification compartment, exit, A first fluid conduit extending between the device compartment and the humidification compartment, the first fluid conduit being configured to deliver pressurized breathable gas from the device compartment to the humidification compartment. A second fluid conduit extending between the humidification compartment and the outlet, the second fluid conduit being configured to deliver pressurized breathable gas from the humidification compartment to the outlet, and A third fluid conduit connected to the first fluid conduit and / or the second fluid conduit; A humidification tank, configured to contain a water supply and at least partially removably received in the humidification compartment in a vertical direction, such that in an operating configuration, the humidification tank is arranged to receive a pressurized breathable gas flow through a first fluid conduit and to output a pressurized breathable gas flow with increased humidity through a second fluid conduit to the outlet. The humidification tank includes a channel configured to receive the third fluid conduit in the operating configuration.

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