Ultrasound Guided QLB III Versus Intrathecal Morphine for Analgesia After Cesarean Section

In this prospective double blinded randomized study,120 parturients undergoing cesarian delivery via a Pfannenstiel incision and who agreed to spinal anesthesia were randomly scheduled to receive either a SAM (group SAM, n=60) or a Quadratus lumborum block type 3 (group QLB, n=60).Spinal anesthesia was initiated with hyperbaric Bupivacaïne 0.5% 10 mg, 0,005 mg SUFENTANIL MEDIS and 0.1 mg morphine in the SAM group and with Bupivacaïne 0.5% 10 mg, 0,005 mg SUFENTANIL MEDIS and 1 ml normal saline in group QLB.

After surgery, bilateral QLB block type 3 was performed with the patient in lateral position using bupivacaine 0.25% , 20 mL on each side in group QLB and 20 ml normal saline in group SAM.

Postoperative analgesia for the first 24 hours consisted of a patient controlled analgesia with IV morphine only. If necessary breakthrough pain was treated by 01 g paracetamol intravenously by the same doctor in charge of taking the values of the visual analogue scale.

Patients were assessed postoperatively in the postanesthesia care unit (time 0 hours) and at 2, 4, 6, 12 and 24 hours.

Visual analogue scale (VAS) for pain at rest and during the palpation of the uterine globe was noted.

The primary outcome measure was the total dose of morphine over 24 hours delivered by a patient-controlled analgesia system at predetermined intervals.

Secondary outcomes were visual analogue scale (VAS) for pain at rest and on the palpation of the uterine globe ,heart rate, blood pressure, itching, nausea, pruritus, vomiting and sedation.

Inclusion criteria

• ASA I/II.
• Normal singleton pregnancy with a gestation of at least 37 weeks.

Exclusion criteria

• Heart disease
• Coagulopathy
• pre-eclampsia
• BMI> 40
• Patient refusal to undergo the Quadratus lumborum block.
• Allergy to local anesthetics