Automatic tourniquet with improved pressure resolution

Details Automatic tourniquet with improved pressure resolution Automatic tourniquet with improved pressure resolution

1983-04-15

1985-06-04

Thaler, Michael H.

Surgery

Truss

Pad

A61B 1712

Patent

active

045208204

ABSTRACT:
An automatic tourniquet including a mechanism for inflating and deflating a cuff, a pressure sensing mechanism, and a mechanism for displaying the pressure. The pressure sensing mechanism includes a pressure transducer producing a pair of digital signals, and a mechanism for adjusting the signals so that the pressures at which the transitions between the digital quanta occur for one signal are different from the pressures at which the transitions occur for the other signal. The mechanism for adjusting includes a mechanism for setting the signals to be equal at a selected pressure, and a mechanism for offsetting the signals from each other by a voltage corresponding to one-half a digital quantum. The offset signals are summed by a microprocessor to produce a display with twice the resolution of the individual signals.

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