2.6 Outcome measures
The primary outcome measures were to compare the effects of US-RIB, ESP,
and SAB on postoperative tramadol consumption of patients, and
postoperative pain scores of the patients undergoing unilateral MRM
surgery. The secondary outcome
measures were the dose of remifentanil and
propofol, time of the first pain,
the satisfaction score of patients (1–10, where 10 was the highest). In
addition to these measures, postoperative nausea and vomiting (PONV,
which were rated on a four-point verbal scale: none=no nausea,
mild=nausea but no vomiting, moderate=vomiting one attack,
severe=vomiting>one attack) and
block-related complications such as
pneumothorax, bleeding, allergy, local anesthetic toxicity were also
recorded.