Ventilation mask with heat and moisture exchange device
First Claim
1. A nasal pillows mask, comprising:
- a cushion defining an internal fluid chamber, a pair of pillow portions defining open interiors therein which each fluidly communicate with the fluid chamber, and at least one gas delivery lumen which fluidly communicates with the fluid chamber, the at least one gas delivery lumen having a fluid inlet end proximate the fluid chamber; and
a heat and moisture exchange device disposed within the fluid chamber of the cushion proximate the open interiors of the pillow portions thereof, wherein the heat and moisture exchange device is configured to at least partially segregate the open interiors of the pillow portions from the fluid chamber and further configured so as not to cover the fluid inlet end of the at least one gas delivery lumen and to extend at least partially between the at least one gas delivery lumen and the open interiors of the pillow portions.
11 Assignments
0 Petitions
Accused Products
Abstract
In accordance with the present invention, there is provided a mask, such as a nasal pillows mask, for achieving positive pressure mechanical ventilation (inclusive of CPAP, ventilator support, critical care ventilation, emergency applications). 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 mask of the present invention further includes a heat and moisture exchange (HME) device which is directly integrated into the housing or cushion thereof (thus residing in extremely close proximity to the patient'"'"'s nostrils), and is further uniquely configured to induce a flow pattern between it and the cushion which maximizes the transmission of heat and moisture to air which is inhaled by and exhaled from the patient through the mask.
167 Citations
16 Claims
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1. A nasal pillows mask, comprising:
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a cushion defining an internal fluid chamber, a pair of pillow portions defining open interiors therein which each fluidly communicate with the fluid chamber, and at least one gas delivery lumen which fluidly communicates with the fluid chamber, the at least one gas delivery lumen having a fluid inlet end proximate the fluid chamber; and a heat and moisture exchange device disposed within the fluid chamber of the cushion proximate the open interiors of the pillow portions thereof, wherein the heat and moisture exchange device is configured to at least partially segregate the open interiors of the pillow portions from the fluid chamber and further configured so as not to cover the fluid inlet end of the at least one gas delivery lumen and to extend at least partially between the at least one gas delivery lumen and the open interiors of the pillow portions. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A nasal pillows mask, comprising:
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a cushion defining at least one flow passage, wherein the cushion defines first and second gas delivery lumens which each fluidly communicate with the flow passage, the first and second gas delivery lumens each having a fluid inlet end proximate the flow passage, wherein the cushion further defines at least one delivery section that channels fluid flowing into the flow passage from the first and second gas delivery lumens into a nose of a patient; and a heat and moisture exchange device disposed within the flow passage; wherein the heat and moisture exchange device is configured relative to the flow passage such that fluid flowing into the flow passage has a prescribed pattern of turbulence imparted thereto by the cushion and the heat and moisture exchange device and further configured so as not to cover the fluid inlet end of either of the first and second gas delivery lumens and to extend at least partially between the first and second gas delivery lumens and the at least one delivery section. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification