Due to multiple sources of pain multimodal analgesia approaches have been used. Narcotic medications like opioids help in reducing somatic and visceral pain but they are associated with increased postoperative nausea and vomiting, ileus, sedation, and delayed hospital discharge.

Blocks like Transverse abdominis plane block and oblique subcostal TAP block only help in reducing the somatic pain and have no effect on the visceral component of pain. As the erector spinae fascia extends from the nuchal fascia cranially to the sacrum caudally, the local anaesthetic drugs extend through several levels, and the block can be effective over a large area.

Better postoperative analgesia, reduced nausea, vomiting and reduced surgical stress is expected to enhance the recovery of patients after surgery and lead to greater patient satisfaction. So our study intends to find out the effectiveness of USG-ESPB using different concentrations of bupivacaine on postoperative pain management, reducing perioperative surgical stress and improving patient satisfaction in patients undergoing laparoscopic cholecystectomy.

The procedure shall be performed after inducing general anaesthesia to the patient for surgery. Following intubation, the patient shall be placed in a lateral position and USG guided block shall be given bilaterally at the level of T7 spinous process.

The following parameters shall be recorded in the first 24 hours: NRS score at the surgical site at rest, on movement and on deep breathing at various time intervals, shoulder pain, intraoperative fentanyl requirements, total postoperative analgesic consumption, the incidence of nausea and vomiting and complications related to ESP block. A patient satisfaction survey shall be done on all patients.