Suprascapular and Axillary Blocks Versus Interscalene Block for Shoulder Surgery

After infiltration with 1 mL of 1% lidocaine, local anesthetics (20 mL of 0.5% ropivacaine) will then be injected in 5 mL aliquots to achieve circumferential spread around the nerve.The axillary nerve block will be performed next in the posterior aspect of the operative arm. The neurovascular bundle encompassing the humeral artery, posterior circumflex artery, and axillary nerve is visualized in the lateral edge of the quadrangular space, deep to the deltoid muscle, inferior to the teres minor muscle, and superior to the triceps tendon. After infiltration with 1 mL of 1% lidocaine, local anesthetics (20 mL of 0.5% ropivacaine) will then be injected in 5 mL aliquots after negative aspiration to achieve circumferential spread around the bundle.

After sterile skin preparation with chlorhexidine and infiltration with 1 mL of 1% lidocaine, a 5 cm 22 G insulated needle is then inserted and local anesthetic solution (20 mL of 0.5% ropivacaine) will be injected in 5 mL aliquots after negative aspiration for blood to achieve spread posterior to or between the C5 and C6 nerve roots.