Patent ID: 8240308

Claim:
A respiration valve 401 to be used for performing respiration tests on humans, wherein said respiration valve comprises at least three ports, a first mouth port 402 and two or more breathing ports 403 and 404 , wherein said breathing ports comprise valves to control flow through said breathing ports and wherein at least one of said valves is a pneumatic pinch valve comprising a channel 101 with a flexible wall 201 to be used for said flow, said channel 101 being molded as an integrated part of a surrounding chamber 102 , and where said flexible wall 201 of the channel 101 comprises two opposing angularly interconnected wall segments 202 being angularly connected at interconnection points 203 and wherein said two wall segments are pinched towards each other and close the channel completely based on pressure 103 from fluid introduced into said chamber, said pressure acting approximately equally on said two opposing angularly interconnected wall segments 202 .