Method and apparatus for an ipsilateral reflex test

Details Method and apparatus for an ipsilateral reflex test Method and apparatus for an ipsilateral reflex test

1974-08-20

1976-04-13

Howell, Kyle L.

Surgery

Truss

Perineal

73553, 128 2N, 179 1N, A61B 512

Patent

active

039497356

ABSTRACT:
There is a well known clinical test of acoustic reflex in the human ear based upon a contraction of the stapedial muscle of the ear. The normal test method and equipment requires the use of test apparatus on both of the patient's ears. This test is replaced in the new method by a test method using a single probe which is applied to only one ear. The new acoustic reflex testing method subjects one ear to a probe tone and to a resulting relative compliance measurement. A stimulus tone is applied to the same ear to cause a contraction of the stapedial muscle which is indicated by a sharp change in the measure compliance at some stimulus tone level. In the new method of this invention, use is made of an observed delay between application of the stimulus and the contraction of the stapedial muscle. A switching system is used to obtain a second relative compliance reading during the delay period and after the stimulus has been turned off. The two relative compliance measurements are compared during the delay period and a signal is generated as soon as they differ significantly as a result of the stapedial muscle contraction.

REFERENCES:
patent: 2415310 (1947-02-01), Summerville et al.
patent: 3294193 (1966-12-01), Zwislocki
patent: 3295513 (1967-01-01), Dippolito
patent: 3395697 (1968-08-01), Mendelson
patent: 3757769 (1973-09-01), Arguimbau et al.

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