Surgery – Truss – Pad
Patent
1977-06-24
1979-08-21
Cohen, Lee S.
Surgery
Truss
Pad
73194EM, A61B 502
Patent
active
041649397
ABSTRACT:
An intravascular loop probe includes two lenticular, compressible, resilient, and expansible wire loops disposed in planes substantially mutually perpendicular to each other for operation in a conduit traversed by a magnetic field externally applied. The loops are insulatively joined at the point of maximum curvature. The wires at the open ends of the loops continue as a wire bundle beyond a ground electrode and are cemented together to form a stem for inserting the probe into the conduit via a catheter. Central portions of loop wires are bared to serve as electrodes. The loop terminal wires which form the stem of the probe are connected to external circuitry so that each of the two orthagonal loops is serviced by a separate circuit. The circuitry is such that electromagnetic signals due to flow and magnitude of vascular diameter derived from any type of paired orthogonal flow diameter sensors will be vectorially combined into a signal which does not change as the orthogonal probe is rotated about its axis of symmetry.
REFERENCES:
patent: 3605726 (1971-09-01), William et al.
patent: 3717031 (1973-02-01), Biscan
patent: 3757773 (1973-09-01), Kolin
patent: 3798967 (1974-03-01), Gieles et al.
Berens et al., "New Stable . . . Pacing Loop", Am. J. Cardiology, vol. 34, Sep. 1974, 325-332.
Kolin et al., "An Intra-Arteria . . . Gauge", IEEE Trans on Bio-Med Eng., vol. 18, No. 2, Mar. 1971, pp. 110-114.
Cohen Lee S.
Loveman Edward H.
The Regents of the University of California
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