The goal of this prospective randomized double-blind study is to determine if an ultrasound guided peri-arterial injection of local anesthetic (LA) superomedially the femoral artery via peripheral nerve catheter reverses ischemic hypertension associated with prolonged lower extremity tourniquet time.
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Change in tourniquet hypertension as measured by systolic blood pressure
Timeframe: From time of injection to 30 minutes after injection