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Blocks at the Wrist Indication: Surgery of the hand, rescue blocks Position: The arm is placed with the palm facing up. Ulnar Nerve Block at the Wrist Anatomy: The ulnar nerve lies below the flexor carpi ulnaris tendon and medial to the ulnar artery. Procedure: Mark a point 5cm above the wrist crease. Insert the needle posterior to the flexor carpi ulnaris tendon. Obtain adduction of the thumb and little finger at < 0.5mA and inject. Inject 5mL of local anesthetic. Median Nerve Block at the Wrist Anatomy: The median nerve lies lateral to the palmaris longus tendon and medial to the flexor carpi radialis tendon. Procedure: Mark a point 5cm proximal to the wrist crease. Insert the needle just lateral to the palmaris longus tendon. Obtain flexion of the fingers and wrist at <0.5mA. Inject 5mL of local anesthetic. Radial Nerve Block at the Wrist No nerve stimulator is necessary for this block. Using a 25G 1.5” short bevel needle inject 5mL of local anesthetic solution in a fan shaped manner proximal to the anatomical snuff box.