Apparatus for detecting the resonant frequency of a bone

Details Apparatus for detecting the resonant frequency of a bone Apparatus for detecting the resonant frequency of a bone

1985-10-29

1989-01-24

Howell, Kyle L.

Surgery

Truss

Pad

128739, A61B 510

Patent

active

047994983

ABSTRACT:
An apparatus for detecting resonant frequency of bones has an electro-mechanical transducer arranged for application to the external skin surface covering a bone, the transducer being in a feed-back circuit with an amplifier and phase shifter having a unity gain and a loop phase of zero. The feed-back circuit is connected to a display comprising an A-D converter and a digital display. The apparatus displays the lowest order transverse mode set up in a bone.
In a further embodiment the transducer is arranged to pierce the skin and to be in direct contact with a bone. The transducer has a coupling rod and a detector which may be both positioned at the same station on a bone or at spaced stations along a bone.

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