CO.sub.2 gas sampling mask having a bevelled sampling tube extending into the mask
First Claim
1. A CO2 gas sampling mask comprising securing means, a mask membrane sufficiently flexible to be held around the cheeks in an elliptical manner by said securing means, said mask when worn by a patient fitting downward from about an eye level starting level along a nose at the nose angle from vertical to a point beyond the tip of the nose and then turning downward to a level about even with an indentation between lower lip and chin to form a floor of a pocket and then going around the chin upward over the cheek and back to said eye level starting level, said mask having two openings in said floor, a forward opening for introduction of oxygen therethrough and a rearward opening for removing respiratory gas to measure carbon dioxide content comprising a bevelled intake end sampling tube molded integrally with said mask and continuous with an integrally molded female luer locking connector, said bevelled end sampling tube extending inside of said mask in front of the mouth and the nose and having said bevelled end adapted to directed toward the mouth and the nose from which respiratory gas is exhaled.
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Accused Products
Abstract
An oxygen mask made of clear flexible material, for example, polyvinyl chloride, has a gas pocket just inside two holes in it, below the nose and in front of the mouth, the holes adapted to lead via tubing, one to an oxygen source and the other to a respiratory gas or carbon dioxide monitor, the rest of the mask being gas-proof except for permissible small openings at about ear and cheek level. The gas pocket is formed by the mask extending outward in front of the face, particularly the nose and mouth, and having the holes in the floor thereof, tubes and connectors being adapted to fit through the holes and go to an oxygen source and a carbon dioxide monitor.
141 Citations
6 Claims
- 1. A CO2 gas sampling mask comprising securing means, a mask membrane sufficiently flexible to be held around the cheeks in an elliptical manner by said securing means, said mask when worn by a patient fitting downward from about an eye level starting level along a nose at the nose angle from vertical to a point beyond the tip of the nose and then turning downward to a level about even with an indentation between lower lip and chin to form a floor of a pocket and then going around the chin upward over the cheek and back to said eye level starting level, said mask having two openings in said floor, a forward opening for introduction of oxygen therethrough and a rearward opening for removing respiratory gas to measure carbon dioxide content comprising a bevelled intake end sampling tube molded integrally with said mask and continuous with an integrally molded female luer locking connector, said bevelled end sampling tube extending inside of said mask in front of the mouth and the nose and having said bevelled end adapted to directed toward the mouth and the nose from which respiratory gas is exhaled.
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6. An oxygen mask placeable over the nose and mouth of a user comprising:
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a. a pocket; b. an inflow tube penetrating said pocket for directing oxygen into said pocket toward the nose and the mouth; and c. a sampling tube penetrating said pocket between said inflow tube and the mouth, said sampling tube having a bevelled end opening toward said mouth and away from said inflow tube, said sampling tube extending inside of said mask in front of the mouth and the nose and having said bevelled end adapted to be directed toward the mouth and the nose from which respiratory gas is exhaled.
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Specification