Oxygen facemask with capnography monitoring ports

Abstract

An oxygen face mask to cover a user's nose and at least partially cover a user's mouth with lateral sampling ports; systems including such a face mask; and methods of using such a face mask.

1 . A face mask to cover a user's nose and at least partially cover a user's mouth and configured to deliver oxygen to a user, the face mask comprising:
 a reservoir adapted to contain a pocket of gas;   an inlet port configured to deliver gas to the reservoir;   first and second vents on opposite sides of a midline of the mask, each vent including multiple vent ports configured to vent gas from the reservoir through the mask into the atmosphere; and   first and second sampling ports extending through the mask to be in fluid communication with the reservoir, each of the first and second sampling ports located on or within a circle circumscribed around the respective vent ports and capable of being coupled to a conduit used to sample and analyze gas from the reservoir.   
     
     
         2 . The face mask of  claim 1  further comprising a conduit configured to be coupled to the first sampling port wherein the second sampling port is not coupled to the conduit during normal face mask use. 
     
     
         3 . The face mask of  claim 1  further comprising an oxygen inlet port. 
     
     
         4 . The face mask of  claim 3  wherein a center of each of the first and second sampling ports is at least about 20 mm away from a center of the oxygen inlet port. 
     
     
         5 . A breathing mask system comprising a face mask configured to cover a user's nose and at least partially cover a user's mouth, the face mask comprising:
 a reservoir adapted to contain a pocket of gas;   first and second lateral sampling ports on opposing sides of a midline of the mask, the first and second lateral sampling ports capable of being coupled to a conduit used to sample gas from the reservoir;   first and second vents configured to release gas from the reservoir through the mask to the atmosphere, the first lateral sampling port located adjacent the first vent at a distance that enables the sampling of gas that will pass from the reservoir through the first vent, the second lateral sampling port located adjacent the second vent at a distance that enables the sampling of gas that will pass from the reservoir through the second vent.   
     
     
         6 . The system of  claim 5  further comprising an alarm configured to provide a signal when a level of an expiratory gas detected by a sensor is different from a threshold amount. 
     
     
         7 . The system of  claim 5  wherein a sensor is coupled to the first lateral sampling port, the sensor configured to detect an expiratory gas. 
     
     
         8 . The face mask of  claim 1  wherein the first and second vents are structured to allow gas to pass only one way through the vents. 
     
     
         9 . The system of  claim 6  wherein the first and second sampling ports are at a distance of 1 mm to 15 mm from the respective first and second vents. 
     
     
         10 . The system of  claim 6  comprising a sensor coupled to the first lateral sampling port, the sensor capable of detecting an expiratory gas. 
     
     
         11 . The system of  claim 6 , wherein the face mask further comprises an oxygen inlet port. 
     
     
         12 . The system of  claim 11  wherein a center of each of the first and second sampling ports is at least about 20 mm away from a center of the oxygen inlet port. 
     
     
         13 . The system of  claim 6  wherein the first and second vents are structured to allow gas to pass only one way through the vents. 
     
     
         14 . A medical face mask to cover a user's nose and at least partially cover a user's mouth and configured to deliver oxygen to a user, the face mask comprising:
 a reservoir adapted to contain a pocket of gas;   an inlet port configured to deliver gas to the reservoir;   first and second vents on opposite sides of a midline of the mask and capable of venting gas from the reservoir through the mask into the atmosphere;   first and second lateral sampling ports extending through the mask to be in fluid communication with the reservoir, each of the first and second sampling ports located close enough to the vents to enable sampling of exhaled gas as the exhaled gas is moved from the reservoir past the first or second lateral sampling port to the respective first or second vent.   
     
     
         15 . The medical face mask of  claim 14  wherein the inlet port comprises an oxygen inlet port. 
     
     
         16 . The medical face mask of  claim 15 , wherein a center of each of the first and second sampling ports is at least about 20 mm away from a center of the oxygen inlet port. 
     
     
         17 . The medical face mask of  claim 14  wherein the first and second vents are structured to allow gas to pass only one way through the vents. 
     
     
         18 . The medical face mask of  claim 14  the first and second sampling ports are located within the respective first and second vents. 
     
     
         19 . The medical face mask of  claim 18  wherein the first and second sampling ports are located at a center of the respective first and second vents. 
     
     
         20 . The medical face mask of  claim 18  wherein the first and second sampling ports are located off-center of the respective first and second vents. 
     
     
         21 . The medical face mask of  claim 14  wherein the first and second sampling ports are at a distance of 1 mm to 15 mm from the respective first and second vents.