Patent ID: 7997268

Claim:
An anesthesia device, comprising: a. an anesthetic source which contains an amount of anesthetic; b. a flow of gas through said anesthetic source which entrains an amount of said anesthetic; c. an inhalation circuit coupled to said anesthetic source which provides a flow path to deliver said anesthetic entrained in said flow of gas to a patient; d. an exhalation circuit in which an exhaled mixture of gases of said patient flow; e. a carbon dioxide absorber containing a carbon dioxide absorbent which receives said exhaled mixture of gases of said patient; f. a carbon dioxide sensor responsive to an amount of carbon dioxide in said flow of gas delivered to said patient, wherein said carbon dioxide sensor comprises: i. an infrared emission source which generates an amount of infrared radiation passed through said flow of gases delivered to said patient; ii. an infrared emission detector which detects said amount of infrared radiation after said amount of infrared radiation passes through said flow of gases delivered to said patient; iii. an infrared signal generator which generates a infrared signal in response to detection of said amount of infrared radiation after said amount of infrared radiation passes through said flow of gases delivered to said patient; and iv. an infrared signal receiver which receives said infrared signal; g. a carbon dioxide level determination element coupled to said infrared signal receiver which determines an amount of carbon dioxide in said flow of gases delivered to said patient; h. a gas-vapor sensor having a radio frequency coupler which includes an oscillator coupled to a first plate and radiofrequency detector coupled to a second plate, said oscillator generating an electromagnetic field between said first plate and said second plate, said radiofrequency detector generating a signal which varies based upon said amount of anesthetic in said flow of gas between said first plate and said second plate; and i. a gas analysis element coupled to said gas-vapor sensor which identifies a type of anesthetic in said flow of gas.