Less use of rescue morphine when a combined PSP/IPP-block is used for postoperative analgesia in breast cancer surgery: A randomised controlled trial.

Background: Surgery for breast cancer is common, and intravenous opioids are often used to control postoperative pain. Recently, pectoralis-2 (PECS-2) block has emerged as a promising regional anaesthetic alternative. With nomenclature recently proposed, this block is termed combined PSP/IPP-block (pectoserratus plane block/interpectoral plane block).