There are several different ways of brachial plexus block, such as intermuscular groove approach, supraclavicular, subclavian vascular side, axillary approach, etc., and their anesthesia complications are also different.
Transcervical brachial plexus block: ① Sometimes the onset time of ulnar nerve block is delayed; ② Bilateral block should not be performed at the same time; ③ Transient Horner syndrome may appear; ④ A few patients may have phrenic nerve block.
Intermuscular groove block method: ① Ulnar nerve block takes effect late, and sometimes it is necessary to increase the amount of blocked liquid medicine; (2) There is a risk of accidental entry into subarachnoid space or epidural space; ③ Possible injury to vertebral artery; ④ Bilateral block should not be performed at the same time to avoid bilateral phrenic nerve or recurrent laryngeal nerve being blocked.