Asymmetric single electrode cuff for generation of unidirectiona

Details Asymmetric single electrode cuff for generation of unidirectiona Asymmetric single electrode cuff for generation of unidirectiona

1984-10-11

1987-03-17

Kamm, William E.

Surgery

Truss

Pad

128421, A61N 104

Patent

active

046499369

ABSTRACT:
A single electrode, asymmetric electrode cuff (B) is disposed around a nerve trunk (A). A signal generator (C) is connected between a cathode (20) disposed asymmetrically in the electrode cuff and an anode (22) disposed in an electrically conductive relationship within the body tissue. The signal generator applies a stimulus signal (FIG. 3) which generates unidirectionally propagating action potentials on the nerve trunk. The electrode cuff includes a dielectric sleeve (10) in which the cathode is positioned a first distance (L1) from an escape end (14) and a second distance (L2) from an arrest end (16). The first distance is at least 1.7, and preferably about 7, times the second distance. This asymmetry causes a primary or forward stimulus signal current (30) to be correspondingly greater than a secondary or reverse current (32).

REFERENCES:
patent: Re26810 (1970-03-01), Schwartz et al.
patent: 3157181 (1964-11-01), McCarty
patent: 3654933 (1972-04-01), Hagfors
patent: 3738368 (1973-06-01), Avery et al.
patent: 3774618 (1973-11-01), Avery
patent: 4341221 (1982-07-01), Testerman
"A Technique for Collision Block of Peripheral Nerve: Single Stimulus Analysis", IEEE Trans. on Biomed. Eng., vol. BME-28, No. 5, May 1981.
"A Technique for Collision Block of Peripheral Nerve: Frequency Dependence", IEEE Trans. on Biomed. Engr., vol. BME-28, No. 5, May 1981.
"Generation of Unidirectionally Propagated Action Potentials in a Peripheral Nerve by Brief Stimuli", Science, vol. 206, pp. 1311-1312, Dec. 1979.

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