What is the common site of brachial plexus block anesthesia needle?

Brachial plexus block anesthesia needle belongs to one kind of nerve block anesthesia, belongs to local anesthesia. Anesthesiologists choose different puncture sites according to different surgical sites of patients, including intermuscular sulci, axilla, supraclavicular, subclavicular, etc. Different puncture sites are selected, and the block anesthesia sites are slightly different, but generally speaking, they are all for the upper limbs.