Surgery – Diagnostic testing – Cardiovascular
Patent
1997-10-17
1999-09-28
Nasser, Robert L.
Surgery
Diagnostic testing
Cardiovascular
600488, 600561, A61B 500
Patent
active
059578530
ABSTRACT:
A biological pressure measuring system with a transmission device for transmitting a biological pressure at a biological location to a pressure monitor/transducer for measuring the biological pressure. An atmospheric pressure transmission device transmits an atmospheric pressure at a reference location to a reference pressure device for measuring atmospheric pressure and a vertical fluid pressure of the fluid in the atmospheric transmission device. The reference pressure device generates a reference pressure signal with a reference excitation signal representing a pressure of the fluid from the atmospheric pressure transmission device, a vertical distance between the reference location and the reference pressure transducer device being substantially similar to a vertical distance between the transducer and biological location. A signal connection device combines the biological pressure signal and the reference pressure signal into a combined signal. The signal connection device feeds the combined signal into the pressure monitor and combines the biological and reference pressure signals to cause an atmospheric component and a vertical fluid pressure component of the biological and reference pressure signals to substantially cancel each other in the combined signal.
REFERENCES:
patent: 4776343 (1988-10-01), Hubbard et al.
patent: 4779626 (1988-10-01), Peel et al.
patent: 5103832 (1992-04-01), Jackson
patent: 5280789 (1994-01-01), Potts
patent: 5697375 (1997-12-01), Hickey
Nasser Robert L.
Vital Evidence, Inc.
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