1986-10-22
1988-09-13
Rosenbaum, C. Fred
Surgery
Truss
Pad
128679, 128686, A61B 502, A61B 1712
Patent
active
047701757
ABSTRACT:
An occlusive cuff which is useful for safety occluding blood flow into the digit of a human subject distal to the cuff for the duration of a surgical procedure. The cuff comprises: an inflatable, readily collapsible tube formed of thin, flexible and substantially inextensible material wherein the ratio of the tube width to digit circumference is substantially smaller than the fixed ratio of tube width to digit circumference specified for a sphygmomanometer cuff which would accurately estimate blood pressure in the digit; means for securing the tube around substantially all of a portion of the digit; pressurizing means for pressurizing the tube; pressure relief means for depressurizing the tube; pressure sensing means for producing a cuff pressure output signal representative of the pressure to which the tube is pressurized; occlusion pressure selection means for selecting remotely the minimum constant pressure to which the tube should be pressurized to safety occlude blood flow into the digit distal to the cuff; pressure regulator means responsive to the cuff pressure output signal for selectably activating the pressurizing means and the pressure relief means to maintain the cuff pressure near the selected pressure over a time period suitably long for the performance of a surgical procedure.
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J. A. McEwen and R. W. McGraw, "An Adaptive Tourniquet for Improved Safety in Surgery", IEEE Trans. Bio-Med. Eng., vol. BME-29, 1982, pp. 122-128.
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Kartchner Gene B.
Rosenbaum C. Fred
Western Clinical Engineering Ltd.
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