Catheter heating circuit for continuous cardiac output...

Details Catheter heating circuit for continuous cardiac output... Catheter heating circuit for continuous cardiac output...

2005-08-09

2005-08-09

Evanisko, George R. (Department: 3762)

Surgery

Diagnostic testing

Cardiovascular

Reexamination Certificate

active

06926675

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.

REFERENCES:
patent: 5594375 (1997-01-01), Carlson et al.
patent: 5636638 (1997-06-01), Carlson et al.
patent: 5797964 (1998-08-01), Carlson et al.
patent: 93/15655 (1993-08-01), None

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