Surgery – Truss – Perineal
Patent
1975-05-05
1976-07-27
Oechsle, Anton O.
Surgery
Truss
Perineal
128 205R, 338 6, A61B 510
Patent
active
039713636
ABSTRACT:
A myocardium wall thickness measuring transducer comprises a circular beam of high compliance and an elongated spike which extends in the plane in which the beam is disposed. The spike is connected at one point to the beam while a working end of the spike to which a barb is attached, extends through an opening in the beam at a substantially diametrically opposite point. The beam portion, surrounding the opening, is free to move or be displaced relative to the spike. A sensitive strain gauge is bonded to the beam to sense changes in the tension thereof. The working end of the spike is inserted through the epicardium into the myocardium so that the spike and the beam are in a plane substantially perpendicular to the epicardium at the point of insertion. The spike is inserted, to a depth at which a minimal beam deforming force is applied by the myocardium to the beam portion surrounding the opening. As the heart contracts and myocardium thickness increases larger beam-deforming forces are applied to the beam which increase the beam tension, which is sensed by the strain gauge whose changing output is supplied to an appropriate recorder.
REFERENCES:
patent: 2815424 (1957-12-01), Painter
patent: 3553625 (1971-01-01), Stedman
patent: 3820529 (1974-06-01), Gause et al.
Culler Virgil H.
Feldstein Cyril
Fletcher James C. Administrator of the National Aeronautics and Space
Lewis Gilbert W.
Silver Robert H.
Grifka Wildred
Manning John R.
Mott Monte F.
Oechsle Anton O.
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