Orthopedic diagnostic procedures and apparatus therefor

Details Orthopedic diagnostic procedures and apparatus therefor Orthopedic diagnostic procedures and apparatus therefor

1982-03-26

1984-03-20

Howell, Kyle L.

Surgery

Truss

Pad

128774, A61B 512

Patent

active

044374739

ABSTRACT:
Attempts have been made to facilitate orthopedic diagnostic procedures by microphonic detection of emissions from a moving joint, with analysis of such emissions to establish correlation with pathological conditions, but these attempts have failed. Success in such a procedure is now found to require detection of emissions extending into the subsonic frequency range. Preferably a piezoelectric accelerometer detector (10) is used in direct contact with the skin. A plurality of detectors can be used around a joint with comparative analysis to localize a condition. Analysis suitably involves a frequency analyzer (14) with the possible intermediary of a multi-track tape recorder (12), the analyzer output being displayed by a printer (15) preferably of ink-jet form. One useful correlating emission characteristic is peak frequency for early diagnosis for congenital dislocation of the hip in an infant.

REFERENCES:
patent: 3181528 (1965-05-01), Brackin
patent: 3985121 (1976-10-01), Hellenbrand
patent: 4008711 (1977-02-01), Olinger et al.
Bradley et al., Journal of Urology, vol. 118, 1977, pp. 73-75.
Anishkina et al., Biomed. Eng., vol. 12, No. 1, Sep. 1978.
Blinowska et al., Med. and Biol. Engr. and Comput., Mar. 1979, vol. 17, pp. 207-210.
Chu et al., Med. and Biol. Engr. & Comput. vol. 16, No. 4, Jul. 1978, pp. 437-442.
A Critical Appraisal of Auscultation of Human Joints, British Medical Journal--Congenital Hip Dislocation: An Increasing and Still Uncontrolled Disability?

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