Outcome measures
toxicity, dyspnea, hoarseness, nausea, vomiting
HORNER SYNDROME, PNEUMOTHORAX
The primary outcome was the anesthesia success rate with a non-inferiority test. Secondary outcomes included: incidence of suppression of the pleura when administering the first injection; the sensory and motor blockade scores of all branch nerves at 5 min, 15 min, and the end of surgery; evaluation of the motor response of double injections; ﻿the time to perform ISB, which was defined as the time from the start of initial scanning to the withdrawal of the needle; intraoperative dosage of propofol and sufentanil; the cumulative consumption of tramadol within 24 h after surgery; resting and moving VAS scores at 2, 4, 6, 12 and 24 h after surgery; duration of surgery defined as the time from the start of surgical incision to the end of the last stitch; time to readiness for surgery defined as the time from withdrawal of the needle to the start of surgical incision would also be recorded. Simultaneously, ISB-related side effects such as nausea, vomiting, Horner Syndrome, dyspnea, hoarseness, pneumothorax, and anesthetic toxicity were recorded.