40 results about "Dead space" patented technology

In some implementations, a low dead space airway adapter for sampling fluid flowing through a ventilation assembly includes an outer wall configured to couple to an endotracheal (ET) tube adapter and an internal projection positioned at least partially within an internal cavity defined by the outer wall and configured to extend within an internal cavity of the ET tube adapter when the airway adapter is in use. The internal projection can include a fluid passageway configured for fluid communication with at least a portion of the internal cavity of the ET tube adapter and a free end comprising an opening in fluid communication with the fluid passageway. At least a portion of the free end can be chamfered around the opening and configured to contact an inner surface of the ET tube adapter when the outer wall is coupled to the ET tube adapter.

A user interface comprising a non-sealing nasal cannula and a mask arranged about the nasal cannula, the mask including a seal configured with a user's face to allow the interface to be pressurised, the cannula configured to deliver breathing gases to the nares of a user at a flow rate exceeding the intended user's peak inspiratory flow requirements so that the mask and the user's pharynx are flushed continuously with fresh breathing gases to reduce dead space.

The invention belongs to the technical field of expiration detection, and particularly relates to an intelligent expiration tail end gas sampling device and method. The device specifically comprises a shell, a circuit board, a carbon dioxide sensor, a pressure sensor, a baffle, a top cover, a suspension plate, an air pump, a relay, a breathing mask, a mask connector with an internal small cavity, a thermal desorption tube, a TD tube, a Bluetooth module, an air path channel, a silicone tube and the like. End-expiratory gas collection is achieved through accurate triggering and flow control, and dead space gas mixing is avoided; collected gas is directly enriched into a thermal desorption (TD) adsorption tube, so that the loss of VOCs in the transmission and storage process is reduced; and through quantitative sampling volume control and an optimized pipeline material / structure, the adsorption / release and background pollution of the device body to the sample are reduced, so that the representativeness and sensitivity of sampling and the repeatability among different operators / different places are improved.

The invention discloses a body training mask for passively adjusting oxygen concentration in breathing air, and relates to the technical field of physical training equipment, the body training mask comprises a body training mask mechanism, the outer side of the body training mask mechanism is connected with a bandage mechanism, and one side of the body training mask mechanism is provided with a filtering mechanism. According to the body training mask, the first-layer mask body and the second-layer mask body are flexibly connected through the flexible connecting piece, folding operation can be conveniently carried out in the using process, the size of the mask can be adjusted through a folding structure, and then the oxygen concentration can be accurately adjusted and controlled according to the breathing dead space principle; after the volume of the mask is adjusted by the folding structure, low-oxygen exhaled air which is not completely exhausted in the closed space is mixed with outside fresh air in the mask to form a stable low-oxygen environment, the volume of the mask is increased by unfolding the folding structure, the breathing dead space is enlarged, and the oxygen concentration is reduced; the contraction folding structure reduces the size, the breathing dead space becomes small, and the oxygen concentration is increased.

Provided are methods and systems for measuring lung function, such as shunt and deadspace, using pulmonary gas exchange in management and treatment of pulmonary diseases including COVID-19.

The present application relates to standard head mould, including head mould, be used to support head mould support assembly, the inside of head mould is provided with trachea, the upper end of trachea is installed in the mouth of head mould and the upper end of trachea is communicated with the mouth of head mould, the upper part of trachea is provided with detection assembly, support assembly includes upper base, lower base, the support leg of fixed installation in the lower end of lower base, the upper end of upper base is provided with the positioning convex slot matched with the bottom of head mould, the central of upper base and lower base is provided with the through hole one for the lower part of trachea, the standard head mould of the present application is designed to refer to international standard ISO 16900-5:2016, ISO 16900-5:2018 (Amendment-1) and ISO / TS 16976-2:2015, can be used for the detection of dead space, noise of medical respiratory protection product, its structure design is reasonable, and installation, dismounting operation is simple and convenient.

The utility model relates to resuscitator dead space detection technical field, concretely is a kind of resuscitator dead space detection device, it include: base, the upper end of base is placed with transparent rigid container, and transparent rigid container between connection has trachea, the inside of transparent rigid container is provided with latex air bag, and latex air bag between through trachea constitute intercommunication connection, the middle part upper surface of base is fixed with fixed frame, and transparent rigid container is formed and is engaged with the base between the connection through fixed frame, the upper end of fixed frame is welded with support plate. Resuscitator dead space detection device is controlled by standardization component and solenoid valve, ensure the use convenience and safety of the device, through the reasonable setting of structure, not only can the dead space of mask this conventional product be accurately detected, but also can the effective detection of rescue type suction and breathing dead space product be carried out.

The invention discloses a valve micro lip-attaching dead-cavity-free in-mask waste gas replacement structure which comprises mask belts, an air filtering mask, an exhaust valve base, an exhaust one-way sealing opening, a one-way exhaust valve plate, a telescopic adjusting pipe, a left nose exhaust pipe, a right nose exhaust pipe and the like. By adjusting the position of the exhaust unit, the exhaust one-way sealing opening is slightly attached to the lip, the nose exhaust pipe is slightly attached to the nostril, the valve plate is directly opened by means of flowing energy of exhaled air, peripheral retention air is injected by means of the Venturi effect, exhaled waste gas is completely exhausted in real time, dead space is thoroughly eliminated, and the problems of oxygen deficit, stuffiness, fogging, stinking and high breathing resistance are solved.

A process, a signal processing unit and to a ventilator automatically calculate a set point for a frequency, with which the ventilator performs ventilation strokes and thereby mechanically ventilates the patient. An alveolar or proximal minute volume is predefined. A lung time constant for the lungs of the patient is determined. The volume of a dead space in a fluid connection between the lungs and the ventilator is determined. A mandatory frequency set point (fset,mand) for the mandatory ventilation of the patient is calculated. An ideal frequency (fspon), with which the patient can achieve the minute volume by means of spontaneous breathing, is calculated. The ventilation frequency set point is calculated as a weighted average of the mandatory frequency set point (fset,mand) and of the ideal frequency (fspon). The averaging depends on a determined actual intensity of the spontaneous breathing of the patient.

The utility model discloses an anti-knotting anesthesia breathing pipeline which comprises a heat and humidity exchange filter shell lower cover, and a heat and humidity exchanger shell upper cover is arranged on one side of the heat and humidity exchange filter shell lower cover. A heat and humidity exchange medium and a filter membrane are arranged in the lower cover of the heat and humidity exchange filter shell, a breathing tube I and a breathing tube II are arranged on one side of the upper cover of the heat and humidity exchanger shell, and the upper cover of the heat and humidity exchanger shell further comprises two parallel inner conical joints conforming to YY. Standard regulations. When medical gas such as anesthetic gas is ventilated, bacteria and viruses are filtered through the breathing tube with the regular triangular hole and the filter membrane, heat and humidity exchange is carried out through the heat and humidity exchange medium, the temperature and humidity of the gas suitable for being inhaled are achieved, and finally the gas reaches the airway of a patient. And dead space is reduced, iatrogenic infection of bacteria and viruses and bending and knotting of a breathing pipeline are avoided, the installation process is simplified, and operation of a doctor is facilitated.

The object of the invention, which relates to a speaking valve (1) and to a method for using the speaking valve (1) on a tracheotomy patient, is to provide a solution in which the speaking valve (1) is robust and can be produced easily and cost-effectively. In addition, the speaking valve (1) is intended to make it possible to control an air flow during exhalation through the upper respiratory tract. Furthermore, the dead space volume inside the speaking valve (1) is to be minimized. This object is achieved by the arrangement in that at least one air outflow opening (8) which can be sealingly closed by means of a closure element is arranged in a wall of the housing (2) of the speaking valve (1), in that the closure element is a separate hollow truncated cone (9) mounted rotatably within the housing (2) of the speaking valve (1), and in that at least one opening (16) corresponding to the air outflow opening (8) is arranged in the hollow truncated cone (9).

The invention relates to a breathing system (1) for assisting a gas exchange on a patient (2) by means of mechanical breathing, comprising a breathing device (3) for mechanically breathing the patient (2), which breathing device has a regulating device (5) for applying a gas and a breathing circuit (7). Furthermore, the respiratory system (1) has a dead space reduction device (4), which has a pump and reservoir unit (16) and a connection hose (17) to a pneumatic coupling point (18) at the patient interface (9). In order to provide a simpler structure, the invention proposes that the breathing system (1) is designed in such a way that a signal change, which is measurable by the breathing device (3) and is attributable to the activity of the dead space reduction device (4), for example a signal change for flow or pressure, is detected and / or calculated by the breathing device (3) as such a signal change, and is taken into account by the regulating device (5). As a result, the breathing device (3) can assist the dead space reduction device (4) and in this case can omit a second pump and reservoir unit (16).

An embodiment of the present application discloses a method for correcting respiratory monitoring data, a device for correcting respiratory monitoring data, a computer device, and a computer-readable storage medium. The method includes: obtaining first respiratory data and second respiratory data, where the first respiratory data is the respiratory data collected in multiple cycles before the current respiratory cycle, and the second respiratory data is the respiratory data collected within the current respiratory cycle; performing a delay process on the first respiratory data to obtain a respiratory delay that meets a preset condition; correcting the second respiratory data according to the respiratory delay to obtain third respiratory data; generating a volumetric capnogram according to the third respiratory data to determine a first airway dead space and a second airway dead space, where the first airway dead space is determined by the volumetric capnogram, and the second airway dead space is determined by the corrected volumetric capnogram; determining the airway dead space according to the first airway dead space and the second airway dead space; and outputting the airway dead space and the third respiratory data. In this way, accurate respiratory monitoring data can be obtained.

Systems and methods for non-invasive ventilation are provided. The systems may include a gas source that provides breathing gases to a patient through one or more of a primary flow path (PFP) and a flushing flow path (FFP). The system may include a control assembly configured to open and restrict gas flow through the PFP. When the PFP is open, a significant portion of the gas flows through the PFP while the remaining gas flows through the FFP. When the PFP is restricted, a significant portion of the gas flows through the FFP. Increased flow through the FFP may have a high velocity (especially relative to the flow through the PFP). Gas delivered through the FFP may be used to flush dead space. One or both flow paths may contribute to inspiratory positive airway pressure (IPAP), expiratory positive airway pressure (EPAP), and / or positive end expiratory pressure (PEEP).

The present invention relates to the technical field of exhaled gas sampling, and discloses an exhaled gas phased collection device, including a host system and a power supply module; the host system includes a gas drying module, an information interaction module, a gas phased collection module, a main control module and a data processing module. The information interaction module is used to select the exhaled gas collection mode and the interaction of voice and display information. The main control module controls the gas phased collection module according to the selected exhaled gas collection mode to simultaneously collect single or multiple selected exhaled gases in the ambient gas, dead space gas, and alveolar gas in phases, detect the gas collection status, and the installation status of the disposable mouthpiece and air bag during the exhaled gas collection process, and the inflation status of the air bag at the gas collection port. The above-mentioned exhaled gas phased collection device is intended to divide the gas exhaled by the human body into different stages for collection, provide technical means for collecting the corresponding stage gas for exhaled gas detection of different diseases, and improve and promote the development of disease exhaled gas detection technology.

The invention belongs to the technical field of fuel gas blow-off, and particularly relates to a rupture disk recovery device and an emergency fuel gas blow-off system. In order to prevent fragments generated after rupture of a rupture disk from affecting the flowing characteristics of fluid, the rupture disk recycling device comprises a shell used for covering the rupture disk and a capturing structure arranged in the shell, the shell comprises a baffle used for directly facing the rupture disk and an enclosure frame used for connecting the baffle and a pipeline, and the capturing structure is arranged in the shell. The enclosure frame is provided with outflow holes communicating the inside and the outside of the enclosure frame, a dead cavity is formed in the sides, close to the baffle, of all the outflow holes, and the capturing structure is arranged in the dead cavity. The invention further discloses an emergency fuel gas blow-off system adopting the corresponding rupture disk recovery device. By utilizing the characteristics of the dead cavity, when the rupture disk is just ruptured, the pressure in the dead cavity is lower, so that high-pressure fluid can carry fragments to enter the dead cavity; and after the fragments are captured by the capturing structure, the fluid is difficult to flow through the fragments, so that the influence of the fragments on the flow characteristics of the fluid can be reduced to the greatest extent.

The invention relates to the technical field of medical instruments, and discloses a trachea cannula capable of performing end-tidal carbon dioxide detection, which comprises a hose, an air bag arranged on the outer side of the hose, a flexible trachea arranged on the outer side of the air bag, a joint arranged on the outer side of the hose, a joint arranged on the outer side of the joint, an oxygen connecting pipe and a guide assembly arranged in the joint, the guide assembly specifically comprises a partition plate arranged in the connector. According to the trachea cannula capable of carrying out end-expiratory carbon dioxide detection, by arranging the guide assembly, when the trachea cannula works, oxygen enters the first interval through the oxygen connecting pipe and then enters the second interval and the hose in sequence, and exhaled gas enters the third interval from the hose and then enters the fourth interval, the first interval and the oxygen connecting pipe in sequence; in this way, the space in the main body is divided to form a stable circulation channel, gas in the main body circulates sufficiently, dead cavities are avoided, and the accuracy of monitoring results is guaranteed.

Systems and methods for non-invasive ventilation are provided. The systems may include a gas source that provides breathing gases to a patient through one or more of a primary flow path (PFP) and a flushing flow path (FFP). The system may include a control assembly configured to open and restrict gas flow through the PFP. When the PFP is open, a significant portion of the gas flows through the PFP while the remaining gas flows through the FFP. When the PFP is restricted, a significant portion of the gas flows through the FFP. Increased flow through the FFP may have a high velocity (especially relative to the flow through the PFP). Gas delivered through the FFP may be used to flush dead space. One or both flow paths may contribute to inspiratory positive airway pressure (IPAP), expiratory positive airway pressure (EPAP), and / or positive end expiratory pressure (PEEP).

The utility model discloses a detection system of an air supply and exhaust filtering type respirator, and relates to the technical field of respirator detection. The head mold is arranged in the cabin body and is used for wearing a hood of the detected air supply and exhaust filtering type respirator; the pressure difference detection unit comprises a wind pressure transmitter, a first temperature and humidity sensor, a second temperature and humidity sensor and a gas mass flow meter; the filtering efficiency detection unit comprises a particle-containing air generation system, a first particle laser counter and a second particle laser counter; the dead space detection unit comprises a respiration simulator, a carbon dioxide adsorber, a carbon dioxide supply assembly, an air pump and a carbon dioxide sensor; the noise detection unit comprises a noise transmitter arranged in the head mold; and the controller is in signal connection with the upper computer. And the detection efficiency and accuracy of the air supply and exhaust filter type respirator are improved.

To eliminate a dead space between a gasket and a flange.SOLUTION: Provided is a gasket 30 having an annular shape, mounted between planar seal surfaces 12x of opposing flange parts 12. The gasket includes a step formed between a radially inner surface 30b and a radially outer surface 30c, both of which are continuous with an inner circumferential surface. The radially inner surface 30b is located on an axially outer side from the radially outer surface 30c. The radially inner surface 30b and the radially outer surface 30c each form a plane orthogonal to an axial direction. After the radially inner surface 30b comes into contact with the seal surfaces 12x, the radially outer surface 30c comes into contact with the seal surfaces 12x.SELECTED DRAWING: Figure 7

The device and method of the invention address the need to ensure the adequate and accurate collection and delivery of small volumes of breath condensate liquid samples to detection reagents for detection of targets including nucleic acids, RNA, DNA, pathogen(s), organic compounds, cells, virus, bacteria, fungi, protein, chemical, biomolecules, molecules or spores. Small amounts of liquid condensate are collected in a syringe barrel in the form of film, frost or droplets on the internal wall of a collection chamber. A central turbulence inducer tube is used to introduce exhaled breath into the collector. Most of the syringe barrel collection volume is dead space and air. Collected liquid volumes are dispensed out of the syringe barrel in the presence of air. This accomplished through a low dead volume design of the syringe plunger and dispensing needle. Withdrawing the turbulence inducer from the syringe engages the tip to convert the turbulence inducer to a plunger to dispense the collected liquid.

The utility model discloses a sensor assembly for respirator detection, which relates to the technical field of respirator detection and comprises a fixed box, the fixed box is arranged in a cabin for respirator detection, a head mold is arranged in the cabin, and the head mold is used for wearing a hood of a detected respirator; a first wind pressure transmitter, a second wind pressure transmitter, a carbon dioxide sensor, a first particle laser counter and a second particle laser counter are fixedly arranged in the fixed box; a first temperature and humidity sensor is fixedly arranged in a right ear of the head mold, a noise sensor is fixedly arranged in a left ear of the head mold, the device further comprises a second temperature and humidity sensor which is fixedly arranged in the cabin body and located in the space outside the head cover, and the second temperature and humidity sensor is located outside the fixing box. The device can be used for detecting various indexes such as static pressure difference, dynamic pressure difference, temperature and humidity, filtering efficiency, dead space and noise of a hood in respirator detection, and is convenient to use.

Respiratory support apparatus and related methods of use are disclosed herein that include a manifold and a facemask. The manifold is attachable to the facemask and includes valves that control the inflow and outflow of gas through the manifold and facemask. The valves are positioned to minimize the volume of the manifold to allow flushing of the manifold during a portion of exhalation. A volume of the facemask is also minimized to allow flushing of the facemask during the portion of exhalation. The flow rate of the respiratory gas and a dead space volume comprising the manifold volume of the manifold and a facemask volume of the facemask is configured to equate generally a detention time and a flushing time.

The invention belongs to the field of medical instruments, and particularly relates to a mechanical alveolar gas collecting device which comprises a gas inlet end, a gas blowing opening and a waste gas opening are formed in the gas inlet end, and the gas blowing opening is in a blowing nozzle shape. Therefore, a more accurate analysis result of the VOCs components in the expired gas is provided. In the process that a subject exhales air, dead space air and alveolar air are separated through the air flow channel controlled by the air pressure valve, collection of the alveolar air is achieved, and mixing of the dead space air is avoided.

The utility model relates to a respiratory mask relates to the positive pressure ventilation technical field, the utility model discloses a respiratory mask, including gasket subassembly and headband connecting subassembly, one side of gasket subassembly is used for with the face of user contact, and the other side of gasket subassembly is used for with headband connecting subassembly links, gasket subassembly is close to the one side of headband connecting subassembly and is provided with first opening, and first opening corresponds to the mouth and / or nose position of user, is provided with the connecting portion of first opening on first opening can cover first opening, therefore the exhaust hole on the connecting portion of corresponding position with first opening is closer to the mouth and nose of user, thereby the exhaust path of exhaust through first opening and exhaust hole is shorter, can therefore reduce the dead space of respiratory mask, accelerate the exhaust rate of user exhalation gas, reduce carbon dioxide residual in chamber, avoid causing the problem that carbon dioxide content is relatively higher in respiratory mask.

The invention discloses a breathing machine for medical care, which relates to the technical field of medical instruments and comprises an oxygen inhalation mask, an interface part is integrally formed in the oxygen inhalation mask, an exhalation tube is arranged at the bottom end of the interface part, an exhalation valve is arranged on the outer wall of the exhalation tube, a carbon dioxide probe is arranged in the oxygen inhalation mask, and an air outlet groove is formed in the exhalation tube. An annular protruding part is formed on the outer side of the expiration pipe, an annular cavity is formed in the annular protruding part, an air outlet pipe is arranged in the air outlet groove, and a circular plate is arranged at the top end of the inner wall of the annular cavity. The retention time and the mixing efficiency of exhaled gas in the mask are remarkably increased, the concentration of re-inhaled carbon dioxide is improved, when the sectional area is enlarged, the dead cavity flushing effect is accelerated, the retention concentration of the carbon dioxide is reduced, and accurate regulation and control of the retention concentration of the carbon dioxide exhaled by a patient in the dead cavity of the mask are achieved.

The invention discloses a pipe-wound valve bottom sheet tail quick-opening exhaust valve nozzle structure which comprises a valve shell, an adjustable exhaust pipe, a left nose annular pipe, a right nose annular pipe, a nozzle exhaust area, a left nose exhaust area, a right nose exhaust area, a page turning type sealing sheet and a nose interval partition plate. A sealing opening of the valve is divided into different functional areas, waste nasal breath is guided to the tail end of a force arm of the page turning type sealing piece in a bypassing mode through the annular pipe, and the valve can be rapidly opened through weak nasal breath air pressure according to the lever principle. And the mouth exhaust area realizes rapid exhaust of waste gas by utilizing high-pressure kinetic energy of an oral cavity. Mutual blow-by of the exhaust areas is prevented through the partition plates between the nasal regions and the Venturi principle. The exhaust sensitivity and thoroughness can be remarkably improved, dead cavities are eliminated through the micro lip attaching layout, the defects that a valve is difficult to open due to waste gas circulation and nostril expiration of an existing mask are overcome, and the mask has the advantages of being compact in structure, friendly in view field, low in cost and high in efficiency.

A system provides warm, humidified gas to a patient via a patient interface. Horizontal connections can be used between the humidification chamber and conduit. To reduce the likelihood of condensate flowing back to the humidification chamber, or dead space or gases recirculation regions occurring within the gases flow path, a raised portion is positioned inside of the flow path to improve flow characteristics and to provide a barrier for condensate back flow. The raised portion also reduces the amount of condensate that is formed in the system and provides better flow characteristics for sensing purposes.

A user interface having a non-sealing nasal cannula and a mask arranged about the nasal cannula, the mask including a seal configured to seal with a user's face to allow the interface to be pressurised, the cannula configured to deliver breathing gases to the nares of a user at a flow rate exceeding the intended user's peak inspiratory flow requirements so that the mask and the user's pharynx are flushed continuously with fresh breathing gases to reduce dead space.

The present invention relates to the field of dead space testing technology, specifically to a dead space testing method and system for a resuscitator, comprising the following steps: based on the readings of an airflow velocity sensor and a pressure sensor, calculating the flow-pressure ratio at each time point, determining the baseline data of the resuscitator under different operating conditions through the ratio, performing stability evaluation on the performance of the resuscitator, and obtaining preliminary stability diagnosis results. The present invention uses flow-pressure ratio calculation to more accurately identify and adjust the performance of the resuscitator under different operating conditions, predict the behavior of the resuscitator under future use conditions through real-time analysis and model optimization, and allow adjustment of its parameters to best suit current use needs, ensuring that the resuscitator can provide the most effective ventilation support at critical moments, and further performance deviation monitoring and abnormality identification capabilities, which can respond quickly when any deviation affecting the efficiency of the device is found, thereby reducing the risk of improper configuration of the resuscitator.