The Effects of General Anesthesia and Combined Anesthesia in Controlled Hypotension During Arthroscopic Shoulder Surgery

Controlled hypotension is one of the important techniques used for facilitates the clarity of the surgical field during arthroscopic shoulder surgery. Brachial plexus or its branches block provides excellent analgesia during arthroscopic shoulder surgery. To test the hypothesis that, during arthroscopic shoulder surgery, general anesthesia combined with nerve block could provide more stable hemodynamic index than general anesthesia. Patients undergoing arthroscopic shoulder surgery were enrolled and divided into 3 groups: general anesthesia group, general anesthesia combined with brachial plexus block, and general anesthesia combined with suprascapular nerve block group. The dosage of vasoactive drugs and anesthetics, parameters of perioperative bleeding, hemodynamic parameters, systemic oxygen metabolism, kidney functions, as well as procedure process and postoperative adverse reactions were recorded and compared between the groups.