Femoral Artery Block for Reduction of Tourniquet Induced Hypertension
Tourniquets, Anesthesia, Conduction, Anesthetics, Local

About this trial
This is an interventional prevention trial for Tourniquets
Eligibility Criteria
Inclusion Criteria: American Society of Anesthesiologists (ASA) physical status I to III Receiving cruciate ligament surgery with > 30 minutes of tourniquet Combined anesthesia (balanced general anesthesia and femoral nerve block) Exclusion Criteria: Nerve block contraindications (block site infection, allergic to local anesthetic) Tourniquet contraindications (peripheral vascular disease or neuropathy, previous arterial bypass graft) Tourniquet inflation time < 30 min Patient refusal Pregnant patients Patients with a active psychiatric disease.
Sites / Locations
Arms of the Study
Arm 1
Arm 2
Experimental
No Intervention
Femoral artery block
No intervention
An experienced Anesthesiologist will perform the femoral blocks, under ultrasound guidance with a linear probe and a 50mm (millimeters) or 80mm needle. No nerve stimulator will be used during the block. In both groups, femoral nerve block at the nerve sheath will be performed with 20mL (milliliters) 0.5% ropivacaine. In the interventional group, additionally to the previous block, the needle will be retracted and advanced to the antero-medial side of the femoral artery where 10mL 0.5% ropivacaine will be injected after negative aspiration.