This study will be a single-centre, assessor-blind, randomised controlled trial to compare the efficacy of the psoas sheath block (experimental group) with the suprainguinal fascia iliaca plane block (control group) in patients undergoing total hip arthroplasty
Participants will be randomly assigned to one of two groups (psoas sheath block or Fascia Iliaca block) using a computer-generated random number sequence. The allocation will be concealed in opaque, sealed envelopes.
The assessor will be blinded to the group allocation to ensure unbiased outcome assessment
Participants aged >18
Patients scheduled to undergo elective unilateral total hip replacement (THR) surgery.
Patients who agree to receive regional anaesthetic blocks as part of their post-operative pain management.
Physical Status: ASA (American Society of Anesthesiologists) physical status classification I-III.
Allergy to Study Medications
History of chronic opioid use (>50mg of oral morphine equivalents per day.
Any neurological condition affecting the lower extremities (e.g., peripheral neuropathy, radiculopathy) that could interfere with pain assessment or recovery evaluation.
Infection at Injection Site