Objective: To observe the clinical effect of preventing DVT after artificial hip replacement with combination of low molecular weight heparin(LMWH) and HuoXueFuYuan Tang and explore its mechanism.

• 目的：观察低分子肝素钠联合活血复元汤预防人工髋关节置换术后下肢深静脉血栓形成的临床疗效并探讨其作用机理。