Patent ID: RE39863

Claim:
A device for determining pressure, temperature and a flow parameter of a flowing fluid, comprising i) a sensor support body ( 13 ) mounted for insertion into a vessel of a living body and having a diaphragm ( 15 ) covering a cavity ( 14 ) formed in said support body ( 13 ); ii) a pressure sensitive element ( 41 ), having a known temperature dependence, mounted on said diaphragm ( 15 ), and providing an output indicative of a pressure; iii) a temperature sensitive resistor ( 42 ) mounted in the vicinity of said pressure sensitive element ( 41 ) and having a known temperature dependence, providing an output signal indicative of a temperature, said resistor ( 42 ) also functioning as a temperature reference means for said pressure sensitive element ( 41 ); and iv) an electrical circuit ( 43 , 44 , 45 , 46 ), connected to the pressure sensitive element and to the temperature sensitive resistor, for calculation of a flow parameter of said flowing fluid on the basis of the temperature signals.