Tourniquet apparatus for intravenous regional anesthesia

Details Tourniquet apparatus for intravenous regional anesthesia Tourniquet apparatus for intravenous regional anesthesia

1990-01-29

1993-10-19

Lewis, Ralph

Surgery

Means for introducing or removing material from body for...

Treating material introduced into or removed from body...

128DIG12, 128DIG13, 128686, A61M 3100

Patent

active

052540871

ABSTRACT:
Tourniquet apparatus for use in intravenous regional anesthesia and limb surgery includes a pressurizing cuff for substantially encircling a limb and applying a varying pressure to an underlying vein in response to variations in a pressure control signal, applied venous pressure sensing means for producing an applied venous pressure signal representative of a pressure applied by the cuff to the underlying vein, venous fluid pressure estimation means for producing a venous fluid pressure signal representative of the pressure of fluid in the vein distal to the cuff, and pressure control means responsive to the venous fluid pressure signal and applied venous pressure signal for generating a pressure control signal to maintain a predetermined relationship between the applied venous pressure signal and the venous fluid pressure signal. The apparatus automatically controls the introduction, retention and release of anesthetic fluid in the limb.

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