Preventing Blood Clots After Joint ReplacementBlood clots referred to as venous thromboembolism (VTE) are a common risk factor after total hip or total knee replacements. Patients are usually put on medication to thin the blood and prevent this from happening. This is called thromboprophylaxis. With shorter hospital stays, there is less follow-up supervision. For this reason, patients must keep taking the preventive medication after going home.
In this study, doctors at the Medical University of South Carolina try to find out the optimal amount of time patients must take thromboprophylaxis. Is 10 days enough time to prevent blood clots? If not, how much more time is needed? Do total hip patients need the same amount of prophylaxis as total knee patients?
A review of the studies published most recently showed that:
blood clot is forming
replacement compared to total hip patients
extended up to 35 days for total hip patients
The authors conclude that further studies are needed to determine optimal levels of thromboprophylaxis after major orthopedic surgery. Each patient must be assessed for specific risk factors for VTE. The more risk factors there are, the more the risk of DVT increases. And finally, the cost of the drug must be weighed against the benefits.
Richard J. Friedman, MD, FRCSC. Optimal Duration of Prophylaxis for Venous Thromboembolism Following Total Hip Arthroplasty and Total Knee Arthroplasty. In Journal of the American Academy of Orthopaedic Surgeons. March 2007. Vol. 15. No. 3. Pp. 148-155.
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