Pressurizing cuff

Details Pressurizing cuff Pressurizing cuff

1984-05-17

1986-08-12

Howell, Kyle L.

Surgery

Truss

Pad

128327, A61B 1712

Patent

active

046050108

ABSTRACT:
A cuff which is useful for accurately, reliably and remotely determining the circumference of a limb which the cuff encircles. The cuff comprises a laminate consisting of a low-impedance conductor that does not vary significantly as a result of bending or flexing, and a high-impedance electrically conductive strip which is in electrical contact with the low-impedance conductor along its length, and which is comprised of a material that is sufficiently flexible to remain in electrical contact with the low-impedance conductor along its length while the conductor is bent or flexed; an electrically conductive contact; and, an elongated strip of flexible material to which the laminate and electrically conductive contact are attached, such that a voltage-dividing circuit may be formed when the cuff encircles the limb, the ratio of voltages being relative to the circumference of the limb and being insensitive to the impedance between the laminate and the electrically conductive contact.

REFERENCES:
patent: 2199408 (1940-05-01), Liberte
patent: 2405265 (1946-08-01), McAlpine
patent: 2896610 (1959-07-01), Speelman
patent: 3756239 (1973-09-01), Smythe
patent: 3765405 (1973-10-01), Natkanski
patent: 3812844 (1974-05-01), Sokol
patent: 4210154 (1980-07-01), Klein
patent: 4501280 (1985-02-01), Hood, Jr.
Geddes et al.; "The Error in Indirect BP Measurement with the Incorrect Size of Cuff"; Amer. Heart Journal, vol. 96, No. 1, 7-1978, pp. 4-8.
McEwen et al.; "An Adaptive Tourniquet for Improved Safety in Surgery"; IEEE Trans. on Biomed. Engineering, vol. BME-29, No. 2, 2-1982, pp. 122-128.

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