Abstract
Deep venous thrombosis (DVT) is a life-threatening postoperative complication and occurs frequently after total-knee-replacement arthroplasty (TKA) and total-hip-replacement arthroplasty (THA). Fondaparinux (FPX) has been used to treat and prevent DVT, however interindividual difference of the drug efficacy exists. Therefore, this chart review was retrospectively conducted to research risk factors for a residual DVT after FPX treatment. Total of 112 patients undergone TKA or THA were treated with 2.5 mg FPX once a day between postoperative day (POD) 1 and 14 from July 2007 through December 2008. Among these patients, 30 patients who were detected DVT on POD 4 were enrolled in this study. Thirty patients were divided into two groups according to the presence (n=11) or absence (n=19) of DVT on POD14. The DVT (-) group had a significantly longer activated partial thromboplastin time (APTT, median 31.4 s) on POD 1 than the DVT (+) group (28.5 s) (p<0.02). Multivariate logistic regression analysis revealed that APTT lower than 28.5 seconds on POD1 was considered to be independent risk factor significantly contributing to residual DVT (odds ratio 17.5, 95% confidential interval 2.0-295.4, p=0.02). These findings should provide useful information for understanding the interindividual difference of the efficacy of FPX after TKA or THA.
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