Pain following cesarean section included both somatic and visceral components and it is typically described as emanating from the abdominal wall incision. Intravenous NSAIDS combined with spinal and/or systemic opioids is usually employed for post-cesarean analgesia. Peripheral nerve blocks are the newer techniques in the multimodal analgesia approach and are associated with the least side effects. 

Quadratus lumborum block (QLB) is one such block for postoperative analgesia in cesarean patients. By dividing the area behind the quadratus lumborum muscle, USG QLB-2 refers to the administration of medication between the posterior side of the quadratus lumborum muscle and the medial lamina of the thoracolumbar fascia, which separates the posterior side of the quadratus lumborum from latissimus dorsi and the erector spinae muscles. USG QLB-3 pertains to the administration of medication at the front of the quadratus lumborum muscle, close to the point at which it is attached to the L4 vertebra’s transverse process. 

40 patients will be sampled by continuous sampling and will be allocated into groups by randomisation. 

GROUP 1 (n = 20): This group will receive USG QLB-2 

GROUP 2 (n = 20): This group will receive USG QLB-3 

All the patients will receive PCA infusion after positioning the patient supine. Maintenance of PCA will be started with boluses of fentanyl with 10 micrograms per ml. The patients will be provided with a remote controlled hand-held button and there will be a provision of patient controlled boluses of 1ml of 10 micrograms per ml of fentanyl, with a lockout interval of 10 min when needed. Inj Diclofenac 75 mg iv will be used as rescue analgesia Time of completion of both types of USG QLB, visual analogue scale at rest (VAS-R) and dynamic VAS (VAS-D) (0, no pain; 10 worst pain imaginable) at 0, 2, 6, 12, and 24 hours postoperatively, time for the first rescue analgesia, total number of PCA demands and total number of PCA demands within 24 hours of surgery, total doses of rescue analgesia used within 24 hours of surgery, apgar scores at 1 and 5 minutes and overall maternal satisfaction scores with nerve block (by asking the percentage of relief the patient felt on a 0-100 VAS scale) will be noted and documented