Surgery – Truss – Pad
Patent
1980-09-11
1982-12-07
Cohen, Lee S.
Surgery
Truss
Pad
128715, 179 1ST, A61B 502
Patent
active
043621643
ABSTRACT:
A stethoscope transducer applicable as a conventional audio transducer and as a phonocardiogram transducer has a body which on one side mounts an electrode carrying chest bell and which on an opposite side mounts a conventional chest bell. A microphone and a rotor assembly are mounted in a cavity in the body. The microphone and earpiece connections on the body communicate through passages in the rotor assembly with the electrode carrying chest bell when the rotor assembly is in a first position and with the conventional chest bell when the rotor assembly is rotated to a second position. These are three electrodes, two being pickup electrodes which each occupy one quadrant of the chest bell rim in diametrically opposite positions. The third electrode is on the rim intermediate the pickup electrodes. The rim is of a non-wettable material providing a hydrophobic surface.
REFERENCES:
patent: 3565060 (1971-02-01), Sipple
patent: 3628527 (1971-12-01), West
patent: 3848582 (1974-11-01), Milani et al.
DeLuce et al., "Pasteless Electrode . . . ", Med. and Biol. Eng. and Comput., 1979, May, No. 3, 17, 387-390.
Nilsson et al., "A Combined Microphone . . . ", Bio. Eng., vol. 8, No. 10, pp. 424-427, 431, Oct. 1973.
Little Michael J.
Wong Shi-Yin
Cohen Lee S.
Hughes Aircraft Company
Karambelas A. W.
MacAllister W. H.
Oberheim E. F.
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