209 results about "Expiratory valve" patented technology

A filtering face mask 10 that has a mask body and a new exhalation valve 14. The mask body is adapted to fit at least over the nose and mouth of a person to help define an interior gas space when the mask is worn. The exhalation valve 14 permits fluid communication between the interior gas space and an exterior gas space. The exhalation valve 14 has a valve seat 20 and a flap 22. The valve seat 20 includes a resilient seal surface 24 and an orifice 30 through which exhaled air may pass to leave the interior gas space. The flap 22 is mounted to the valve seat 20 such that the flap 22 makes contact with the resilient seal surface 24 when the valve is in its closed position and such that the flap 22 can move away from the seal surface 24 in response to an exhalation to allow exhaled air to pass through the orifice 30 to ultimately enter the exterior gas space. A filtering face mask that utilizes an exhalation valve that has a resilient seal surface can enable the valve to open under substantially less pressure, which, in turn, may improve wearer comfort.

A method of operating a ventilator assembly having inhalation and exhalation passages communicating with one another, and a respiration assembly that can perform repetitive respiratory cycles. The method includes (a) connecting the conduit with an open end of an endotracheal tube positioned within the trachea so that the open end leads into the airway below the vocal cords, (b) repetitively cycling the respiration assembly so that during the inhalation phase, gas in the inhalation passage flows through the endotracheal tube and into the airway, and during the exhalation phase, an exhalation valve is maintained relatively closed and the exhaled gases flow pass the vocal cords and out of the mouth thereby facilitating the patient's ability to speak, and (c) monitoring ring the pressure within at least one of the passages during both phases for determining the pressure within the patient for use in operating the ventilator assembly.

A method and an apparatus for monitoring and controlling flows in medical equipment including an anesthetic machine and a ventilator for influencing a patient's respiratory system are disclosed. The apparatus comprises a microprocessor and an airway system comprising drive gas conduits provided with an inhalation valve (2) and an exhalation valve (5) for gas discharging as well as a ventilator end flow sensor (3) for measuring the introduced or discharged drive gas flow through the valves. The airway system also comprises patient end breathing tubing in which a patient end flow sensor (11) for measuring the patient's inspired and expired gas flow is provided. By comparing the measured values of the two flow sensors against the characteristic curve of the inhalation valve (2), the microprocessor can judge the operation states and accuracy of the respective flow sensors and the inhalation valve (2).

The invention discloses a pressure monitoring and controlling method used in an aerating system of a medical device. The pressure monitoring and controlling method comprises monitoring the confining pressure of an expiratory valve on a real-time basis, and regulating and maintaining the pressure and the set confining pressure of the expiratory valve at the same value; and monitoring the pressure of a patient terminal gas channel on a real-time basis, and regulating and maintaining the pressure to reach a set control pressure. The aerating system used in the medical facility comprises a gas path system and a pressure monitoring and controlling device. The pressure monitoring and controlling device comprises a parameter monitoring and controlling unit, a valve control unit and a master controller, wherein the parameter monitoring and controlling unit includes a first pressure detecting device placed in to the patient terminal gas channel in the gas path system, and a second pressure detecting device for monitoring and controlling the confining pressure of the expiratory valve in the gas path system. A breathing machine and an anaesthetic machine using the aerating system in the technical proposal monitor the pressure of a control branch of the expiratory valve therein and employ the pressure as the basis of the feedback control to effectively avoid the external disturbance, thereby realizing stable and reliable pressure control.

The inhalation therapy assembly and method of use described herein increases the efficiency of metered dose inhalers by allowing delivery of the doses to a collapsible reservoir which can be manually pumped, ensuring that medicants contained therein are properly and completely delivered to the patient. Terminal and proximal valves of the one-way diaphragm type allow flow of the aerosol medicants while preventing improper expulsion. An exhalation valve is adjustable to ensure the patient exhales suitably to permit proper medicant absorption. A conventional metered dosage inhaler having an approved FDA canister provides proper dosage to the patient and is joined to the collapsible reservoir by a connector having a plurality of apertures for receiving the MDI and an accessory T-fitting.

The inhalation therapy assembly and method of use described herein increases the efficiency of metered dose inhalers by allowing delivery of the doses to a collapsible reservoir which can be manually pumped, ensuring that medicants contained therein are properly and completely delivered to the patient. Terminal and proximal valves of the one-way diaphragm type allow flow of the aerosol medicants while preventing improper expulsion. An exhalation valve is adjustable to ensure the patient expires suitably to permit proper medicant absorption.

A device for treating a patient suffering from obstructive sleep apnea or snoring can include an expiratory valve connected to a manifold. The expiratory valve can include a body portion including a feedback port configured to be connected to an air flow generator. The expiratory valve can include a plunger at least partially disposed in the body portion. The expiratory valve can include a pressurizing chamber positioned between an end of the plunger and an end of the expiratory valve. The pressurizing chamber can be configured to receive air from the air flow generator through the feedback port.

A filtering face-piece respirator that has a harness and a mask body where the mask body includes a filtering structure and a support structure. An exhalation valve is attached to the mask body and includes a valve seat that is integral to the mask body. The present invention is beneficial in that it eliminates the need to separately manufacture some or all of the non-dynamic parts of the exhalation valve. There also is no need to subsequently attach the valve seat to the mask body.

A positive pressure airway device for providing resistance in an air pathway for a patient exhaling. The device includes an inhalation passageway for letting air into the device when a patient breathing through the device inhales, and an exhalation passageway for passing air out of the device when a patient breathing through the device exhales. The device preferably includes an inhalation valve to allow air to flow into, but not out of, the inhalation passageway, and an exhalation valve to allow air to flow out of the exhalation passageway only when a patient using the device exhales with an expiratory air pressure greater than a pre-determined pressure. A variable pressure spring may control the force needed to open the exhalation valve.

The inventive breath training device comprises a respiratory tube, a low-frequency mechanical air oscillation generator provided with an oscillation chamber embodied therein and provided with an input channel which is embodied in the form of an upwardly extending saddle-shaped body of revolution, contains a spherical ball and is connected to the respiratory tube and to an output channel communicating with ambient air, wherein the respiratory tube is provided with a jacket in which the body of the low-frequency mechanical air oscillation generator rotatable about a horizontal axis is fixed and a bypass chamber provided with an inspiratory tube is formed, said inspiratory tube comprises an inspiratory valve provided with a tubular attachment and the output channel of the oscillation chamber of the low-frequency mechanical air oscillation generator is also provided with an expiratory valve.

Breathing apparatus including an exhalation tube and an outlet port in fluid communication with the exhalation tube, where the outlet port includes an outlet lip that is not uniformly flat in any cutting plane.

A filtering face mask that includes a mask body that is adapted to fit at least over the nose and mouth of a wearer to create an interior gas space when worn; and an exhalation valve that is in fluid communication with the interior gas space. The exhalation valve includes a valve seat with a seal surface and an orifice through which exhaled air may pass to leave the interior gas space; and a flexible flap that is mounted to the valve seat such that the flap makes contact with the seal surface when the valve is in its closed position and such that the flap can flex away from the seal surface during an exhalation to allow exhaled air to pass through the orifice. The flap is unbiased when in its closed position and exhibits a cantilever bend ratio of 0.0050 or less.

A flexible oro-nasal mask for mounting in a rigid shell attached to the helmet of aircrew at a fixed distance therefrom. The flexible oro-nasal mask incorporates an inspiratory and expiratory valve and the periphery of the mask is adapted to make a seal with the pilot's face. The oro-nasal mask includes an extendable structure which presses the periphery of the mask automatically towards the pilot's face to improve the seal therewith when gas at a pressure above that required for normal breathing is supplied to the mask. The extendable structure is configured so that when gas at a high pressure is supplied to the interior of the mask, the portion in the bottom region of the mask extends more than the portion in the upper region of the mask and the bottom of the mask is moved away from the wearer's face by a greater amount in the chin region than the nose region and the mask pivots upwardly automatically to compensate for the effects of G thereon. One embodiment of an extendable structure comprises an annular inwardly directed re-entrant recess formed in the wall of the mask adjacent the peripheral seal, the depth of said recess in the bottom half of the mask being greater than the depth in the top half thereof.

The invention discloses an expiratory valve. The valve comprises a valve body, a top cover, a linear air-resistor, a membrane baffle, a membrane and a valve cover, wherein a first connection part is arranged on the valve body; a second connection part is arranged on the top cover, and the first connection part of the valve body and the second connection part are connected; a plurality of net nest-shaped pores are arranged on the linear air-resistor, and one end of the linear air-resistor is limited by the top cover; the membrane baffle is used for supporting the control external force of a respirator; a groove part for receiving the membrane baffle is arranged on the membrane; and the valve cover is combined with the membrane, and is received in the valve body. Because the expiratory valve is connected and installed in a mode of screw threads, the expiratory valve has low cost, and is convenient for disassembly, cleaning, disinfection and maintenance, so that the expiratory valve can be neatly installed or replaced infinitely, and is suitable for batch production.

A device for treating a patient suffering from obstructive sleep apnea or snoring can include an expiratory valve connected to a manifold. The expiratory valve can include a body portion including a feedback port configured to be connected to an air flow generator. The expiratory valve can include a plunger at least partially disposed in the body portion. The expiratory valve can include a pressurizing chamber positioned between an end of the plunger and an end of the expiratory valve. The pressurizing chamber can be configured to receive air from the air flow generator through the feedback port.

The present invention discloses an expiratory valve, including a step motor, a valve core, a membrane, a first mandril, a base plate and a first elastic part. The valve core is provided with an air inlet, an air outlet and a valve opening. The first mandril is supported on the base plate by elasticity of the first elastic part. The step motor drives a straight-line motion of the base plate by an actuating mechanism. The membrane is elastic, the edge of which is fixed at the valve core, and the parts of the membrane is placed at a motion curve of the first mandril. The valve opening is placed at the motion curve of the membrane, which makes the membrane adjust an opening angle of the valve opening according to an exhalation status. Because the step motor is adopted as driving force, the responding speed is fast; because an elastic force of the elastic part is used as retention of the membrane which seals the valve opening, the opening angle of the valve opening can be dynamically adjusted; because the expiratory valve can adopt the common actuating mechanism, the cost is low, and the expiratory is easy to be realized.

An underwater breathing device, such as a snorkel, may include an exhalation valve. The exhalation valve is configured to produce positive end-expiratory pressure in the airway of a user of the underwater breathing device in order to reduce the overall work of underwater breathing. The exhalation valve includes a plate defining an exhalation port. The exhalation valve also includes a flexible membrane that is sealable against a surface of the plate and is sized and positioned to be capable of sealing the exhalation port. The flexible membrane is configured to have a sealed position in which the flexible membrane seals the exhalation port such that substantially no exhaled air escapes the snorkel. The flexible membrane is also configured to have an unsealed position in which exhaled air escapes the snorkel.

A portable mechanical ventilator having a Roots blower is configured to provide a desired gas flow and pressure to a patient circuit. The mechanical ventilator includes a flow meter operative to measure gas flow produced by the Roots blower and an exhalation control module configured to operate an exhalation valve connected to the patient circuit. A bias valve connected between the Roots blower and the patient circuit is specifically configured to generate a bias pressure relative to the patient circuit pressure at the exhalation control module. The bias valve is further configured to attenuate pulsating gas flow produced by the Roots blower such that gas flowing to the mass flow meter exhibits a substantially constant pressure characteristic. The bias pressure facilitates closing of the exhalation valve at the start of inspiration, regulates positive end expiratory pressure during exhalation, and purges sense lines via a pressure transducer module.

The invention discloses a bowl-shaped three-dimensional folding dustproof mask. The inner layer of the mask is a non-woven fabrics skeleton, and the outer layer is shell fabric, and filter cloth and grid cloth are arranged between the inner layer and the outer layer; the middle section of the grid cloth is a horizontal weld line, and a vertical weld line which is connected with the horizontal weld line extends downwards to the opening edge; the grid cloth can be folded along the horizontal weld line and the vertical weld line; the mask is stuck with silicon rubber on one surface which contacts with the bridge of the nose and the lower forehead of a human face; and an one-way expiratory valve is arranged on one side below the horizontal weld line. The invention has the advantages that the bowl-shaped three-dimensional folding dustproof mask can be folded, can keep original shape after being restored, and has small space usage and provides convenience for packaging and transporting, and a user can conveniently put the mask in the pocket.

The invention is applicable to the field of medical appliances and provides a ventilating system of an anesthesia apparatus and a pressure calibration method thereof. In the embodiment of the invention, pressure acquisition points of a valve seal pressure sensor are arranged in a cavity between an air box and a folding bag, so that the acquired pressure is more accurate; and an air control expiratory valve is changed into an electric control expiratory valve based on a voice coil motor. The invention also provides a pressure calibration method based on an improved air passage, which uses an air passage pressure gauge and a graphical calibration interface of the anesthesia apparatus respiratory system to calibrate all the pressure sensors in the apparatus, thereby realizing fast calibration without disassembling the apparatus and fast calibration of pressure-free calibration equipment, saving the calibration time and lowering the maintenance cost of the apparatus.

The invention provides a device and a method for controlling an exhalation valve, the device for controlling the exhalation valve comprises: a film disk (9); an electromagnetic valve which is positioned at first side of the film disk (9); a first exhaust chamber (11) and an air inlet chamber (10), which are positioned at second side of the film disk (9), and the film disk (9) can selectively block off the air inlet chamber (10) and a channel between the first exhaust chamber (11) and the air inlet chamber (10) by a valve rod (2) of the electromagnetic valve. The method for controlling the exhalation valve comprises that: the electromagnetic valve is controlled to lead the film disk (9) to move towards the direction of an electromagnet under the input pressure function of the air inlet chamber (10); the input air flow of the air inlet chamber (10) is exhausted from the first exhaust chamber (11) from an air flow channel; the air flow is controlled to be directly flowed into an air containing chamber of the exhalation valve, thus pushing an exhalation valve body of the exhalation valve to block off an exhalation chamber of the exhalation valve. The device has fast response time and high control precision.

COVID-19 is a large virus with remarkable resilience, propagation and multiplication features that require complex technologic systems and manners to assure a reasonable protection. A transparent, multiuse face mask with valves and for inhalation of air from a specialized filter placed in a cleaner air space, and an exhalation valve that drives the exhaled air via a tube to a filter bladder placed on wrist and from there to a tube that has the release end near ground, or can be connected to the aspiration tube of the infrastructure, that removes it, preventing recirculation. The general convention that defines the usage method is that the building, buss, and any other enclosure provide clean antiseptic air above and consumer s have to release their exhalations down near floor from where the structure to remove them by a controlled air flow similar to clean rooms.The main condition is that people to place their exhalation exhaust sterilized and placed near ground in order to increase the probability to inhale clean sterile air at the head level. No filter is perfect, and no sterilization unit, therefore the enclosure has to deal with exhaust gas, and remove into the atmosphere safely. The work to keep people inside safe is done by both the enclosure that may provide vacuum lines to collect the exhaled air, and by the people who will use correctly the infrastructure. The system is designed for smart communities for everybody to wear for about 3 weeks when a covid-19 or other virus infection occurs to suppress its multiplication rate, without perturbation in their activity and then returning to normality.

In accordance with the present invention, there is provided a mask for achieving positive pressure mechanical ventilation (inclusive of CPAP, ventilator support, critical care ventilation, emergency applications), and a method for a operating a ventilation system including such mask. The mask of the present invention includes a piloted exhalation valve that is used to achieve the target pressures / flows to the patient. The pilot for the valve may be pneumatic and driven from the gas supply tubing from the ventilator. The pilot may also be a preset pressure derived in the mask, a separate pneumatic line from the ventilator, or an electro-mechanical control. Additionally, the valve can be implemented with a diaphragm or with a flapper.

A negative pressure respirator 20' that has an integrally-disposed filter element 28 and that covers at least the nose and mouth of a wearer. The respirator 20' includes an exhalation valve 22 and an impactor element 50 that covers the exhalation valve 22. The exhalation valve 22 has a diaphragm and an orifice and opens in response to increased pressure when the wearer exhales to allow exhaled air to be rapidly purged from the mask interior. The impactor element 50 is positioned in the exhale flow stream to remove particles and other contaminants from the exhaled air. The exhalation valve and impactor element have a ratio of Zn:Dj of less than about 5. The respirator 20' is beneficial because it provides comfort to the wearer by allowing warm, moist, high-CO2-content air to be rapidly-evacuated from the mask interior through the valve 22 and also protects the wearer from splash-fluids and from polluted air while at the same time protecting other persons or items from being exposed to particles and other contaminants exhaled by the wearer.

An artificial ventilation apparatus includes: a connecting portion which is connected to a respiratory system of a patient; an inspiratory circuit which is a flow path for flowing a gas from a ventilator to the connecting portion; an expiratory circuit which is a flow path for guiding a gas exhausted from the connecting portion to an exhaust portion of the ventilator; an expiratory valve which blocks a flow of a gas from the exhaust portion toward the connecting portion; a carbon dioxide concentration sensor which is disposed in a circuit that is arranged at a downstream side of the expiratory valve and which detects a carbon dioxide concentration; and an alarm outputting unit which outputs an alarm based on an output of the carbon dioxide concentration sensor.

Resuscitation assembly (101) comprising a patient mask (107), a ventilation bag (105), an inflation valve (113), an exhalation valve (111), and an expiration indicator (119). The expiration indicator (119) is a positive end expiratory pressure valve in the form of a slit valve that exhibits a slit (131) in a flexible sheet part (125). Also disclosed is a resuscitation assembly (101) comprising a patient mask (107), a ventilation bag (105), an inflation valve (113), an exhalation valve (111), a positive end expiratory pressure valve (119), and a pressure sensor (133) adapted to measure pressure on the patient side (127) of the positive end expiratory pressure valve (119).

A reusable device that can be attached to any filtering face mask to provide an exhalation valve and a mouthpiece to direct the exhaled air out of the mask, thereby reducing the heat and moisture inside the mask. This device may include a filter to clean the exhaled air for use in areas where directly exhaled air is disadvantageous such as operating rooms and clean manufacturing environments. This device may also include a cutting means that make it easy to attach the device to a mask by aiding in perforating the mask. This device may include various attachment means to secure the device to the mask such as threaded attachments, snap attachments, tapered attachments and adhesive attachments. This device may also include the use of soft materials for the mouthpiece to make the device conformable, comfortable and to minimize trauma in the case of a sudden unexpected impact to the mask. This device may be cleaned and sterilized for reuse. The reusability of the device reduces the cost of the filtering mask. This device may be configured to include a standard one-way valve as available on masks today with an added mouthpiece to direct exhaled air to the outside. This mouthpiece can be removably attached so that it might be transferred to another mask thereby saving cost.

The invention discloses an expiratory vale for a respirator, comprising a valve body which is provided with a valve cavity, an air admission valve port and an air outlet valve port; the air outlet valve port is provided with a valve cover which is internally provided with a membrane; and the valve cavity is internally provided with an air flow sensor. The valve cavity is internally provided with a fluid director which is positioned in the valve cavity between the air admission valve port and the air flow sensor. The valve body is provided with a sensor installation hole which is communicated with the valve cavity. In the proposal, as the valve cavity is internally provided with the air flow sensor, the expiratory valve not only has the uni-directional ventilation function, but also has the expiratory volume measuring function, thus simplifying the structure of the respirator, and lowering the manufacturing cost of the respirator. In addition, the arrangement of the fluid director improves the accuracy of the measurement of the expiratory volume; the arrangement of the installation hole realizes the detachable connection mode of the air flow sensor, and when the valve cavity is cleaned and disinfected, the air flow sensor can be moved out through the installation hole first, thus causing the use and maintenance of the respirator to be convenient.

The invention relates to a dustproof gas mask, comprising a mask main body, an expiratory valve cap, a seal washer and a filter, wherein the expiratory valve cap is arranged at the front part of the mask main body. The dustproof gas mask is characterized in that the seal washer is formed by bonding open-type rubber parts, and the seal washer is arranged at the rear part of the mask main body and is provided with an air inlet hole which is provided with an inflating valve. The part of the inner side of the seal washer touching with the lower jaw of the face of a human body is provided with an anti-skidding piece, and the wall of the part of the seal washer touching with the face of the human body is thinner than other parts. The expiratory valve cap is provided with a louvered-fin air outlet hole, and the direction of the louvered-fin air outlet hole is sloping downward. The dustproof gas mask has the characteristics of comfortable wearing and good tightness.