432 A Rare Case of Ipsilateral Foot Drop Due to Common Peroneal Nerve Palsy at the Level of Fibular Head Following Total Hip Arthroplasty

Abstract Background Common peroneal nerve (CPN) palsy after primary total hip arthroplasty (THA) is a rare complication with poor functional outcome and has prevalence of 0.3-2.1%. Case Presentation A 77-year-old gentleman was diagnosed severe osteoarthritis the left underwent hybrid replacement via posterior approach in right-lateral position. There no usage spinal anaesthesia, leakage from wound, intra-operative injury or any localised haematoma. Post-operatively on day 3, he noted to have foot drop loss eversion dorsiflexion sensory along distribution superficial tibial nerve. Clinical Outcomes Nerve conduction study lower limb showed absent response, extensor digitorum brevis tibialis anterior motor responses denervation across lateral leg muscles suggestive partial lesion common at level fibular head. Patient placed splint follow-up neurological evaluation. Discussion Post-operative CPN are mostly neuropraxias caused due direct compression, either by surgical instruments anatomical structures, tension ischemia during manipulation lengthening. Additionally, cement less components combined Enoxaparin haematoma may compress Age, BMI initial severity deficits prognostic factors indicating recovery. Full recovery between 16-56% cases an average 15 months.