The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 24, 1998
Filed:
Jan. 05, 1996
Anders Lekholm, Bromma, SE;
Siemens Elema AB, Solna, SE;
Abstract
For preventing a patient from being administered an erroneous anaesthetic, an incorrect concentration of anaesthetic or a mixture of anaesthetics, an anaesthetic system is equipped with a device capable of identifying anaesthetics in the anaesthetic system. A device for simple and reliable identification of anaesthetics does so by having a thermal element which varies the temperature of at least some of the anaesthetic to cause it to undergo a change in physical state, e.g., condensation from the gaseous state to the liquid state. A transition temperature at which the change in physical state occurred is determined and the anaesthetic is identified from the determined transition temperature. The condensation point temperature can be determined by sensing the capacitance between two conductors or sensing changes in the resonant behavior of an oscillating crystal.