Evaluating the Efficacy of the Psoas Sheath Block for Post Operative Analgesia Following Hip Arthroplasty

Evaluating the Efficacy of the Psoas Sheath Block for Post Operative Analgesia Following Hip Arthroplasty

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

Inclusion Criteria:

• 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.
• Patients who are willing and able to provide informed consent, demonstrating an understanding of the trial's purpose, methods, and potential risks.
• Patients who are willing to comply with assessments post-surgery

Exclusion Criteria:

• 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
• Coagulopathy or Anticoagulant Use: Patients with coagulopathy (INR >1.5) or who are on anticoagulant therapy that cannot be safely discontinued for the block procedure.
• Severe Respiratory or Cardiovascular Disease: Any severe respiratory or cardiovascular disease (e.g., severe chronic obstructive pulmonary disease, heart failure) that may increase perioperative risk and complicate recovery.
• Cognitive impairment or conditions (e.g., dementia with MMSE <24) that would prevent reliable pain reporting or compliance with post-operative assessments