Operation method of ultrasound-guided puncture needle for superficial branch of radial nerve of forearm

After local skin disinfection, 22G nerve block puncture needle is used for puncture. The direction of injection is adjusted, and local anesthesia drug (0.375% ropivacaine 3ml) can be injected near the radial nerve. Since it is usually accompanied by the radial artery, the complete tip position of the needle should be seen during the block process to prevent it from straying into the blood vessel. During infusion, draw back to make sure there is no blood