A method and apparatus are is disclosed for determining whether respiratory gas is present in a gaseous sample. The sample is brought into contact with an indicator which yields an indication within a diagnostically effective period of time of the presence in the sample of carbon dioxide in concentration...http://www.google.es/patents/US5179002?utm_source=gb-gplus-sharePatente US5179002 - Apparatus for determining whether respiratory gas is present in a gaseous sample
Apparatus for determining whether respiratory gas is present in a gaseous sample
