Surgery – Truss – Pad
Patent
1986-07-23
1988-04-05
Kamm, William E.
Surgery
Truss
Pad
128675, 128748, 73705, 250231P, A61B 502
Patent
active
047352124
ABSTRACT:
Apparatus is provided for simultaneously measuring fluid pressure at multiple sites at remote locations within a body cavity. A single elongated optical fiber capable of being inserted into such a body cavity is employed and which has a light transmitting core which is coaxially surrounded by cladding means essentially throughout its length. The core is uncladded at a plurality of portions of its length near the distal end thereof. A pressure transducer is located at each of the uncladded core portions. Each 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. The transducer member is constructed of material exhibiting a greater index of refraction than the cladding means and selective optical absorption so that the intensity of light passing through the core proximate to the transducer member is modulated in intensity as a function of the pressure. Each transducer includes light wavelength dependent means for modulating light at a particular wavelength different from that of the other transducers.
REFERENCES:
patent: 3051003 (1962-08-01), Witt
patent: 4201222 (1980-05-01), Haase
patent: 4487206 (1984-12-01), Aagard
patent: 4543961 (1985-10-01), Braun
Cordis Corporation
Hanley John C.
Kamm William E.
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