Pressure and oxygen saturation catheter

Details Pressure and oxygen saturation catheter Pressure and oxygen saturation catheter

1986-08-12

1988-03-15

Kamm, William E.

Surgery

Truss

Pad

128675, 128748, 73705, 250231P, A61B 502

Patent

active

047306220

ABSTRACT:
Apparatus is provided for simultaneously measuring the oxygen content in blood as well as blood pressure at one or more sites within a body cavity or blood vessel. An elongated optical fiber is located within a catheter capable of being inserted into a body cavity. The distal end of the catheter contains a filter covering an end hole so that light may be transmitted through the filter at wavelengths in the red and infrared region while reflecting light of other wavelengths. This permits measurement of the oxygen content of blood. The optical fiber is coaxially surrounded by cladding means essentially throughout its length and is uncladded for at least a portion of its length near the distal end thereof. The catheter carries a pressure transducer associated with the uncladded core portion. The pressure transducer includes a flexible transducer member having an irregular surface facing the uncladded core portion for making surface area contact therewith so that the contacting surface area varies with applied pressure acting transversely of the catheter.

REFERENCES:
patent: 3051003 (1962-08-01), Witt
patent: 4201222 (1980-05-01), Haase
patent: 4487206 (1984-12-01), Aagand
patent: 4543961 (1985-10-01), Brown

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