What is the principle of brachial plexus anesthesia needle

Brachial plexus anesthesia belongs to nerve block anesthesia, which is one of the commonly used anesthesia methods in clinical practice. Its main operation mode is to inject local anesthetic around the brachial plexus nerve trunk to make the area innervated by these nerves produce pain loss. The principle of brachial plexus anesthesia is closely related to its anatomy.

The brachial plexus consists mainly of the anterior branch of the spinal nerve from C5 to C8 and thoracic 1. It runs behind the subclavian artery and enters the axilla behind the clavicle. There are three clinical methods for brachial plexus block: 1. Intermuscular sulcus block. 2. Supraclavicular block. 3. Axillary block method. What kind of block method to take is mainly related to the site of the operation.