FAILURE TO INFLUENCE HYPOTENSION DURING SPINAL-ANESTHESIA WITH A LIMBTOURNIQUET

Fourty patients undergoing total hip replacement under spinal anaesthe sia were allocated randomly to have a thigh tourniquet inflated after exanguination of the leg not being operated on or to act as controls. Significant hypotension (systolic arterial pressure <70 mm Hg) was tre ated with i.v. ephedrine in 6 mg boluses. There was no significant dif ference between the two groups with respect to systolic blood pressure or requirement of ephedrine, during the hour that the tourniquet was applied or the period immediately after the removal of the tourniquet.