Background: The use of ultrasonography (USG) to identify fascial layers has led to the development of several newer interfascial techniques for analgesia of the chest and abdominal wall. Two such modalities are the Pectoral nerve block (PEC) and Serratus Anterior Plane (SAP) block. Objective: To compare the duration and quality of analgesia provided by ultrasound-guided SAP block with PEC block II in patients undergoing breast surgeries after induction of general anesthesia. Design: Randomized, double-blinded, prospective study. Methods: Sixty female patients were divided into two groups of 30 each. Patients in Group P received USG guided PEC II block, whereas patients in Group S received USG-guided SAP block after induction. Outcome Measure: The primary objective was to compare the duration of pain relief, whereas the secondary objectives were to compare the degree of pain relief, postoperative analgesic requirement within 24 h after the completion of the surgery, patient satisfaction score and complications if any. Results: The mean time of the first dose of analgesic given was 826 ± 405.24 min. in Group P and 1280 ± 264.29 min. in Group S (P < 0.001). The mean numeric rating scale score at rest at 6 h, on movement at 2 h and 6 h and satisfaction scores in Group P were significantly more than Group S. Conclusion: Ultrasound-guided SAP block provides better postoperative analgesia both in quality and duration over PEC II block.
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