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:
Aug. 09, 2005
Filed:
Jan. 29, 2002
Erno Muuranto, Helsinki, FI;
Juha Virtanen, Helsinki, FI;
Erno Muuranto, Helsinki, FI;
Juha Virtanen, Helsinki, FI;
GE Healthcare Finland Oy, Helsinki, FI;
Abstract
The present invention concerns a catheter heating circuit for continuous cardiac output measurement. The circuit comprises a DC power source for supplying an operating voltage for the circuit, wherein the heating power from the heating circuit is fed to the catheter via an isolating transformer. Isolation is known per se and it is not described in detail. According to the invention the heating circuit further comprises means for generating a bipolar square wave with variable duty cycle, which square wave is supplied to said isolating transformer and further to the catheter filament.