Application of Midazolam Injection in Patients with Intraoperative Nerve Block Anesthesia and Sedation Assisted by Medical Image.

This paper explores the clinical effect of midazolam as an adjuvant analgesic and tranquilizer after brachial plexus block anaesthesia with the aid of medical imaging. The paper selected 106 patients who underwent elective unilateral upper extremity surgery from January 2017 to December 2019, and randomly divided them into group A and group B, with 53 cases in each group, all underwent brachial plexus block anaesthesia, and group A was given imidazole Lon assisted sedation, group B was given fentanyl + midazolam assisted sedation. Under ultrasound-guided intermuscular sulcus brachial plexus block, observe and record the ultrasound anatomical images before injection, the distance from the lower edge of the upper, middle and lower trunk of the forearm brachial plexus to the skin; observe and record the operation time and the effect of anaesthesia block And the incidence of adverse reactions. The distance from the lower edge of each nerve trunk to the skin (average value): upper stem 1.002 cm, middle stem 1.598 cm, and lower stem 2.26 cm. The average operation time is 3min+56s; 92% of the operation time is within 3-5min. The anaesthesia effect was 81% excellent, 11% good, 6% poor, 2% ineffective, and 92% effective. Ultrasound guided inferior intermuscular sulcus approach brachial plexus block is suitable for unilateral upper extremity hand radial surgery. For surgery involving the upper extremity hand ulnar side, a larger dose (concentration) of local anaesthetics should be used within a safe range and (or) additional ulnar nerve block is necessary. Midazolam adjuvant medication can play a good sedative and amnestic effect in brachial plexus block anaesthesia, help reduce pain and inhibit the increase in stress levels.