背景　正如肺栓塞患者受益于肝素的应用一样,肺栓塞的发病率及死亡率也是众所周知的。然而,肝素的使用方式及其不良作用,尤其是对于近期实行了全髋成形术的患者,尚未有很好的研究。因此,对于未确诊为肺栓塞的患者使用肝素,就引起人们的关注。此项研究的目的在于探索对全髋关节 Background Just as pulmonary embolism patients benefit from the use of heparin, the incidence and mortality of pulmonary embolism is also well known. However, the use of heparin and its adverse effects have not been well studied, especially in patients who have recently undergone total hip arthroplasty. Therefore, the use of heparin in patients with undiagnosed pulmonary embolism has caused concern. The purpose of this study is to explore for total hip