Ventilation mask with integrated piloted exhalation valve
First Claim
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1. A nasal pillows mask, comprising:
- a cushion defining at least one flow passage and a valve pilot lumen; and
an exhalation valve cooperatively engaged to the cushion and fluidly coupled to the flow passage;
the exhalation valve being piloted and selectively movable between a closed position wherein fluid flow between the flow passage and ambient air is at least partially obstructed thereby, and an open position wherein at least a portion of the flow passage is vented to ambient air, the valve pilot lumen being adapted to selectively apply a pilot fluid pressure to the exhalation valve in a manner facilitating the movement thereof to the closed position.
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Abstract
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 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.
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Citations
19 Claims
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1. A nasal pillows mask, comprising:
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a cushion defining at least one flow passage and a valve pilot lumen; and an exhalation valve cooperatively engaged to the cushion and fluidly coupled to the flow passage; the exhalation valve being piloted and selectively movable between a closed position wherein fluid flow between the flow passage and ambient air is at least partially obstructed thereby, and an open position wherein at least a portion of the flow passage is vented to ambient air, the valve pilot lumen being adapted to selectively apply a pilot fluid pressure to the exhalation valve in a manner facilitating the movement thereof to the closed position. - 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 an internal fluid chamber, a valve pilot lumen, a pair of pillow portions which each fluidly communicate with the fluid chamber, and at least one gas delivery lumen which fluidly communicates with the fluid chamber; and an exhalation valve cooperatively engaged to the cushion in a manner wherein the valve pilot lumen is fluidly coupled thereto, the exhalation valve being fluidly coupled to the fluid chamber; the exhalation valve being piloted, and selectively movable between a closed position wherein fluid flow between the fluid chamber and ambient air is at least partially obstructed thereby, and an open position wherein at least a portion of the fluid chamber is vented to ambient air. - View Dependent Claims (12, 13, 14, 15, 16, 17)
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18. A nasal pillows mask, comprising:
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a cushion defining an internal fluid chamber, a valve pilot lumen, and at least one gas delivery lumen which fluidly communicates with the fluid chamber; a heat and moisture exchanger disposed within the fluid chamber of the cushion and configured to provide an increased measure of elasticity thereto; and an exhalation valve cooperatively engaged to the cushion in a manner wherein the valve pilot lumen is fluidly coupled thereto, the exhalation valve being fluidly coupled to the fluid chamber; the exhalation valve being piloted, and selectively movable between a closed position wherein fluid flow between the fluid chamber and ambient air is at least partially obstructed thereby, and an open position wherein at least a portion of the fluid chamber is vented to ambient air. - View Dependent Claims (19)
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Specification