Abstract: Objective To observe the anesthetic efficacy and safety of bilateral ultrasound-guided supraclavicular brachial
plexus block in patients undergoing arthrolysis for shoulder periarthritis. Methods Twenty-seven patients (ASA class I-II)
undergoing bilateral shoulder joint release surgery and 24 ml received bilateral ultrasound-guided supraclavicular brachial
plexus block anesthesia with 0.4% ropivacaine and 0.8% lidocaine. The visual analogue scale (VAS) scores for shoulder joint
pain were recorded before and after anesthesia. The efficacy of axillary nerve, dorsal scapular nerve and suprascapular nerve
block was evaluated, and the anesthetic effect and complications was assessed during surgery. Before and after anesthesia, the
range of left and right diaphragmatic muscle movement was measured when the patient took a quiet breath and a deep breath.
Results The patients showed no significant variations in MAP, HR, or SpO2 after anesthesia. The VAS scores of shoulder joint
pain during anteflexion, abduction, posterior extension, rotation, posterior extension and medial rotation were significantly
lowered after anesthesia (P<0.05), but the left and the right diaphragm movement range showed no significant difference
between quiet breath and deep breath (P>0.05). The rates of complete block of the axillary nerve and dorsal scapular nerve was
100%, and that of suprascapular nerve was 92.6%. Partial phrenic nerve block occurred in 1 case with mild local anesthetic
toxicity in another. Conclusion Bilateral ultrasound-guided supraclavicular brachial plexus block in patients has excellent
analgesic effect in should joint release surgery with good safely.