52 results about "Heat and moisture exchanger" patented technology

This invention relates in general to air exchange systems and, in particular, to an improved energy recovery ventilator, a cross flow plate core associated therewith and a method of conditioning air for a building. In one aspect, the invention provides a cross flow plate core comprising: a left hand wafer comprising a left hand spacer with a first of a plurality of membranes bonded thereto, the left hand spacer comprising a plurality of parallel curvilinear rails which form channels for receiving a first stream of air; and a right hand wafer comprising a right hand spacer with a second of the plurality of membranes bonded thereto, the right hand spacer comprising a plurality of parallel curvilinear rails which form channels for receiving a second stream of air, wherein the left hand spacer of the left hand wafer is bonded to the top of the membrane of the right hand wafer.

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. The mask of the present invention may further include a heat and moisture exchanger (HME) which is integrated therein.

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. The mask of the present invention may further include a heat and moisture exchanger (HME) which is integrated therein.

A continuous positive airway pressure (CPAP) system provides positive airway pressure therapy. It has been recognized that users generally prefer to breathe freely rather than to fight the pressurized air when possible. A continuous positive airway pressure (CPAP) system provides positive airway pressure therapy when required, but allows the user to breathe freely with the mask on when positive airway pressure is not required. The system has a valve that moves between two positions to open and close the unassisted breathing vent and the outlet from the flow generator.

A heat and moisture exchanger for both conducting a stream of air produced by a ventilator to a moisturizing medium and internally bypassing the moisturizing medium if aerosolized medication is introduced into the stream includes a housing having a ventilator-side port coupled to an outlet of a ventilator and a source of aerosolized medication. The housing has a patient-side port for coupling to a patient to provide ventilation including either air or air carrying aerosolized medication. A first path conducts air from the ventilator-side port through the moisturizing medium and the patient-side port, and a second path conducts air carrying aerosolized medication from the ventilator-side port directly to the patient-side port. A two-way valve mechanism in the housing selectively couples the ventilator-side port into fluid communication with one or the other of the first and second paths.

A patient interface for supplying a flow of breathable gas to the airways of a patient may comprise a heat and moisture exchanger (HME). The HME may be positioned in a flow path of the flow of breathable gas. The HME may absorb heat and moisture from gas exhaled by the patient and the incoming flow of breathable gas to be supplied to the patient's airways may be heated and moisturized by the heat and moisture held in the HME.

A heat and moisture exchanger (HME) adaptor for a closed suction catheter assembly having one end in communication with a closed suction catheter assembly and another end configured to rotationally engage and releasably hold the HME is disclosed herein. The adaptor may include a retainer having an aperture that engages projections on the HME to releasably secure the adaptor to the HME. The adaptor may include a retaining ring that may be deformed or rotated to engage or disengage projections on the HME. The adaptor may be used with extended use closed suction catheter assemblies.

An architectural heat and moisture exchanger. The exchanger defines an interior channel which is divided into a plurality of sub-channels by a membrane configured to allow passage of water vapor and to prevent substantial passage of air. In some embodiments, the exchanger includes an opaque housing configured to form a portion of a building enclosure, such as an exterior wall, an interior wall, a roof, a floor, or a foundation.

A heat and moisture exchanger configured to be located between a respiratory system of a patient and an anesthesia circuit connected to an anesthesia apparatus, or a respiratory circuit connected to a respirator for maintaining a temperature and humidity of an aspired gas required to a patient under anesthesia or artificial respiration comprises a heat storage carrier material, and a moisture absorption and release material added to the heat storage carrier material. In the heat and moisture exchanger, at least one of density of the heat storage carrier material, number of cells of the heat storage carrier material, and an added amount of the moisture absorption and release material in the heat storage carrier material is set to decrease from the patient side to the side of the anesthesia apparatus or the respirator, along a flow direction of a respiratory gas in the heat storage carrier material.

A heat and moisture transfer system may include a flexible heat and moisture exchanger in fluid communication with an environment control unit and an enclosed space. The flexible heat and moisture exchanger may include at least one flexible water vapor-permeable membrane, and may be configured to pass air streams simultaneously in different directions in adjacent subchannels formed by the membrane.

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. The mask of the present invention may further include a heat and moisture exchanger (HME) which is integrated therein.

A heat and moisture exchanger (HME) device for respiratory therapy, the device comprising a housing defining a passageway for the flow of respiratory gas, where the housing can include a ventilator side port, a patient side port, a first pathway defined within the housing, and a second pathway defined within the housing, a medium located within the first pathway and a valve configured to selectably impede fluid flow through one of the first pathway and second pathway during use. The HME can further include a knob configured to position the valve. The housing can include a first sealing wall and a second sealing wall, where the valve is configured to abut the first sealing wall in a first valve position and to abut the second sealing wall in a second valve position.

The invention discloses a total organic carbon analysis instrument and a method based on an electrochemical catalytic oxidation. The total organic carbon analysis instrument includes an electrochemical reaction pool, a non-dispersive infrared detector, a gas diffusion film, a wet gas exchanger and a gas collecting chamber; an analysis instrument body is sequentially provided with the gas collecting chamber, the wet gas exchanger, the gas diffusion film and the electrochemical reaction pool from top to bottom; the middle part of the gas collecting chamber is insertedly provided with the non-dispersive infrared detector; the electrochemical reaction pool comprises an anode, a cathode, a reaction liquid and a waste liquid discharge port, the inner side wall of the electrochemical reaction pool is oppositely provided with the anode and the cathode, the side wall of the electrochemical reaction pool is provided with the waste liquid discharge port, and the electrochemical reaction pool is internally provided with the reaction liquid; the wet gas exchanger adopts a Nafion or TEFLON polymer tube layer material. The total organic carbon analysis instrument has the characteristics of safety, economy, high efficiency and the like, meets water quality monitoring under microgravity, and can realize on-line continuous monitoring.

The invention discloses a multifunctional medical breathing heat and moisture exchanger. The multifunctional medical breathing heat and moisture exchanger comprises a breathing machine air inlet, a breathing machine extension pipe connector, a plurality of fixed bulges, an air particle filtering material, a heat preservation and moisture retention macromolecule material, a liquid outlet cover, a sputum secretion collecting cavity, two stretchable hoses, a liquid outlet and a filtering cavity, wherein the breathing machine air inlet is connected to the filtering cavity through the stretchable hoses; the fixed bulges are arranged in the filtering cavity; the air particle filtering material and the heat preservation and moisture retention macromolecule material are respectively arranged in the filtering cavity through the fixed bulges; the rear end of the filtering cavity is connected to the front end of the sputum secretion collecting cavity; the rear end of the sputum secretion collecting cavity is connected to the breathing machine extension pipe connector through the stretchable hoses; the liquid outlet is formed in the sputum secretion collecting cavity; the liquid outlet cover covers the liquid outlet. The multifunctional medical breathing heat and moisture exchanger has an effect of filtering air particles and can realize a constant-temperature moisture retention effect so as to protect normal exertion of functions of cilia and glands of respiratory mucosa.

Provided are a ventilation control device and breathing mask equipment with the same. The ventilation control device comprises a cavity, a valve assembly and a heat and moisture exchanger; the cavity is provided with a delivery port, the valve assembly is arranged at the delivery port, for the structure of the valve assembly, when expiration is conducted, the pressure in the cavity is kept larger than the atmospheric pressure, a mask vent which is communicated with the delivery port is formed in the heat and moisture exchanger or the cavity, the mask vent is used for being communicated with a breathing mask, and the heat and moisture exchanger is communicated with the delivery port, so that exhaling and inhaling are both conducted through the heat and moisture exchanger. By means of the ventilation control device, the positive pressure function of the expiratory phase is achieved, and the discomfort caused by continuous positive pressure to a patient is avoided; the ventilation control device does not need to be connected with a positive pressure gas supply device, a pipeline and the like in use, and the patient can move conveniently; when the patient goes out, the patent does not need to carry the positive pressure gas supply device. In addition, the ventilation control device is small in size, convenient to carry and low in cost.

A respiratory gas conditioning system (100) and a method are provided, including an inhale branch (IB), an exhale branch (EB), a low-dead-space heat and moisture exchanger (HME) (50), and a connector (70) for connecting the branches (IB, EB) to a patient (PZ,) characterized in that, the HME (50) is located close to a ventilator (60); and a water reservoir (RS) is located upstream from the HME (50) to moisture-enrich the gas exhaled by the patient (PZ) as it flows along the exhale branch (EB).

A vent assembly for a respiratory pressure therapy (RPT) system. The vent assembly may include a vent housing having a first orifice configured to receive the flow of pressurized gas from the RPT device and the vent housing having a plurality of holes to discharge pressurized gas to atmosphere; a vent housing connector having a second orifice configured to direct the flow of pressurized gas to the patient interface; and a heat and moisture exchanger (HME) comprising an HME housing and an HME material within the HME housing, wherein the vent housing and the vent housing connector are configured to be connected to, at least in part, form a cavity, and wherein the HME is positioned in the cavity when the vent assembly is assembled.