Monitoring medical gas xenon concentration using ultrasonic gas analyser

The concentration of xenon, in a medical gas mixture of xenon as an active component with a known composition of oxygen and, optionally, nitrogen and/or helium recirculating through a medical device ( 103 ) in which carbon dioxide is introduced into the mixture, is monitored by removal ( 135, 133 )...

Full description

Saved in:
Bibliographic Details
Main Authors KERR STUART ALEXANDER, DOWNIE NEIL ALEXANDER
Format Patent
LanguageEnglish
Published 14.10.2008
Subjects
DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY
DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROMTHE BODY
DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
FIRE-FIGHTING
HUMAN NECESSITIES
HYGIENE
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
LIFE-SAVING
MEASURING
MEDICAL OR VETERINARY SCIENCE
PHYSICS
TESTING
Online AccessGet full text

Cover

More Information
Summary:The concentration of xenon, in a medical gas mixture of xenon as an active component with a known composition of oxygen and, optionally, nitrogen and/or helium recirculating through a medical device ( 103 ) in which carbon dioxide is introduced into the mixture, is monitored by removal ( 135, 133 ) of carbon dioxide downstream of the medical device ( 103 ) and subsequently passing the carbon dioxide-free gas through an ultrasonic gas analyser ( 143 ) upstream of the medical device. The gas analyzer determines the xenon concentration by measuring the time delay between transmission of an ultrahigh frequency ultrasonic pulse of at least 100 kHz axially through the sample chamber from a location at one end thereof and reflection of said pulse axially from the other end of the sample chamber back to said location. An analyser of novel construction is disclosed.
Bibliography:Application Number: US20050512797