Posterior Transversus Abdominis Plane Block Combined With Sacral Multifidus Plane Block Versus Posterior Transversus Abdominis Plane Block for Laparoscopic Colorectal Surgery

Inclusion Criteria: * Age between 18 and 90 years * Male or female * ASA class I to III * Elective laparoscopic or robotic colorectal surgery with or without resections requiring perineal incisions. Exclusion Criteria: * Patient refusal * History of previous abdominal surgery, preoperative bowel obstruction symptoms, and requirement for emergency surgery * Conversion to open laparotomy * Coagulopathy, infection at the injection site, allergy to local anesthetics, body mass index \> 30 kg/m2, severe hepatic or renal disease, severe cardiopulmonary disease (≥ ASA IV), diabetic or other neuropathies, patients receiving opioids for chronic analgesic therapy, inability to comprehend visual analogue scale (VAS) and patients transferred to the intensive care unit (ICU) post-surgery.