University of Iowa researchers have determined that thigh size in obese people is a reason their hip implants are more likely to fail…
“We have shown that morbidly obese patients’ thighs are so large that they are actually pushing each other outward and forcing the implant out of its socket,” says Jacob Elkins, a UI graduate student and first author of the paper published in the journal Clinical Orthopaedics and Related Research. “Studies have shown up to a 6.9-fold higher dislocation rate for morbidly obese patients compared to normal weight patients.
The study, titled “Morbid obesity may increase dislocation in total hip patients: A biomechanical analysis,” was published online last month. Elkins is in the UI’s College of Engineering Biomechanical Engineering Program and the Carver College of Medicine’s Medical Scientist Training Program.
Other authors are Matej Daniel, assistant professor at Czech Technical University in Prague, Czech Republic, and former Fulbright Research Scholar at UI Hospitals and Clinics; Douglas Pedersen, UI research associate professor of orthopaedic surgery; Bhupinder Singh, UI doctoral candidate in physical therapy; John Yack, UI associate professor of physical therapy; and John Callaghan, UI professor of orthopaedic surgery.
The National Institutes of Health, the Veterans Administration, and the National Center for Resource Resources funded the research.