Inclusion Criteria:  ASA I-II Age 65-85 Scheduled for hip fracture corrective surgery in Queen Mary Hospital Chinese patients Able to provide informed oral and written consent Abbreviated Mental Test (AMT) 7 or above  Exclusion Criteria:  Patient refusal ASA III or above Allergy to local anaesthetics, opioids, paracetamol, NSAID including COX-2 inhibitors Operation delayed for more than 2 days on admission Pre-existing peripheral neuropathy or history of stroke Preoperative non-walker Pre-existing osteoarthritis of knee (KL grade 4) Multiple fractures (additional to hip fracture) Sepsis Impaired renal function (Defined as preoperative creatinine level >120 μmol or eGFR <50% of normal reference for their age group Patient with coagulopathy (Platelet < 100 or INR >1.5) Prior surgery at the inguinal or supra-inguinal area