Fluid flow sensing apparatus for in vivo and industrial applications employing novel differential optical fiber pressure sensors
Patent 5178153 Issued on January 12, 1993. Estimated Expiration Date: 
January 12, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 12, 2010. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorApplicationNo. 776118 filed on 09/13/1985US Classes:600/505, Sensing means inserted in blood vessel73/861.42, Using differential pressure73/861.52, With restriction356/477, Using fiber or waveguide interferometer356/480, Resonant cavity600/479, Cardiovascular testing600/480, Pressure in blood vessel600/486Testing means inserted in bodyExaminersPrimary: Pellegrino, Stephen C.Assistant: Shay, David M. Attorney, Agent or FirmForeign Patent References
International ClassA61B 005/02AbstractAn optical fiber fluid flow device is provided for in vivo determination of blood flow in arteries. The device includes a fiber optical fluid pressure measuring device having at least first and second optical fiber sensors which optical fiber sensors are positioned in the blood passage and in a restricted flow area in the blood passage and the two fiber optical pressure fluid sensors are connected to an interferometer associated with an opto-electronic demodulator which has an output signal representing the differential pressure between the two sensed area. The device also has utility in industrial applications.Other References
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