Functional evaluation device capable of evaluating an artificial

Details Functional evaluation device capable of evaluating an artificial Functional evaluation device capable of evaluating an artificial

1986-11-13

1989-04-11

Howell, Kyle L.

Surgery

Truss

Pad

128739, 73587, A61B 700

Patent

active

048197530

ABSTRACT:
In a functional evaluation device for use in evaluating functional degradation of an artificial device buried in a living body, frequency zones of acoustic emission are detected by the use of the fact that the functional degradation brings about variation of the frequency zones. The acoustic emission may be measured at two different positions adjacent to the artificial device so as to detect an arrival time difference of the acoustic emission and to thereby locate the functional degradation. The acoustic emission is therefore picked up by a pair of transducers placed at the two positions and is processed by a processing circuit for detecting whether or not the functional degradation takes place and by a determining circuit for locating the functional degradation.

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patent: 4601295 (1986-07-01), Teele
Chu et al; "A Noninvasive Electroacoustical Evaluation Technique of Cartilage Damage in Pathological Knee Jts."; Med. & Biol. Eng. & Comput., 1978, 16, 437-442.
Ouellette; "TMJ Sound Prints", J. of the Amer. Dental Assoc., vol. 89, 9-1974, pp. 623-628.

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