Surgery – Truss – Pad
Patent
1978-12-28
1980-12-02
Howell, Kyle L.
Surgery
Truss
Pad
128782, A61B 505
Patent
active
042365287
ABSTRACT:
A universal arm board for hand and forearm fixation is provided for exposing part of the forearm at the wrist for the attachment of electrodes for stimulating the ulnar nerve. The palm of the person being tested rests on the arm board and is fixed in position by a lock assuring immobility of the palm and fingers and leaving free only movement of the thumb which is positioned in a thumb ring. The wrist is immobilized by a belt with a Velcro lock leaving free the exposed part of the palmar side of the forearm at the wrist for ulnar nerve stimulation. The proximal part of the forearm rests on a foam arm protector and is immobilized by a belt with a Velcro lock. A force-transducer positioner is attached to the arm board. The positioner allows adjustments to any position required by the anatomical differences of the thumb-hand angle and allows changes in the resting tension of the adductor pollicis muscle. A miniature force transducer is attached to the transducer positioner and to the thumb ring which provides for man-machine connection. The thumb ring immobilizes the thumb in position by a Velcro strap. The method of thumb fixation and the shape of the thumb ring accounts for the anatomical differences of the human thumb. The output signal from the force transducer is proportional to the force of thumb adduction produced by increased isometric tension in the adductor pollicis muscle evoked by stimulation of the ulnar nerve at the wrist.
REFERENCES:
patent: 3420222 (1969-01-01), Noe et al.
patent: 3565080 (1971-02-01), Ide et al.
patent: 3898983 (1975-08-01), Elam
Townsend, M. A. et al., J. Biomechanics, 1977, vol. 10, No. 3, pp. 183-193.
Brunner, E. A. et al., Anesthesiology, Nov. 1969, pp. 466-477.
Thomas, D. H. et al., Amer. Journ. of Med. Electronics, Apr.-Jun., 1964, pp. 96-100.
Stanec Anna
Stanec George
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