Upon arrival to recovery room, sensory and motor function will be assessed every 15 mins by a blinded observer. Assessment will be performed for each nerve separately. Block regression is defined as a return of sensation to cold and pinprick with motor power score ≥3 in any nerve region. Time to first request for postoperative analgesia will be noted. Postoperative analgesia will be prescribed as paracetamol 1 g 6 hourly and diclofenac sodium 75 mg 12 hourly. Oxycodone 5-10 mg orally 4-6 hourly will be administered as rescue analgesia.