Introduction This topic includes heterotopic ossification squeaking blood transfusion Other THA Complication topics periprosthetic infection THA dislocation Iliopsoas impingement periprosthetic fractures THA pseudotumor aseptic loosening limb length discrepancy sciatic nerve palsy THA trunnionosis Vascular injury and bleeding Heterotopic Ossification Introduction frequent complication that may limit functional outcome following hip replacement risk factors prolonged surgical time excessive soft tissue handling during procedure hypertrophic osteoarthritis male gender ankylosing spondylitis Treatment surgical excision indications severe loss of motion once heterotopic ossification is visible on radiographs, only surgical excision will eradicate technique must wait 6 months after initial procedure to allow for maturation and formation of capsule perioperative prophylaxis with perioperative radiation or NSAIDs Prophylaxis oral indomethacin radiation therapy 600-800 cGy administered ideally within 24-48 hours following procedure Squeaking Defined as a high pitched audible sound occurring during hip movement Incidence ceramic-on-ceramic 0.5-10% metal-on-metal 4-5% incidence of revision because of squeaking is 0.5% Risks impingement edge loading component malposition loss of fluid film lubrication third body particles thin, flexible (titanium) femoral stem Postoperative Anemia Low preoperative hemoglobin is the best predictor of the need for a blood transfusion postoperatively Prevention TXA Treatment postoperative transfusion indications most centers have dropped to a hemoglobin of 7-8