众所周知,下肢的深静脉血栓形成(DVT)是肺栓塞的主要原因。采用灵敏方法确定肺栓塞,发现约50%的下肢DVT患者存在肺栓塞。由于肺栓塞可以不出现症状,或者有症状但是非特异性的或与其他许多症状相混淆,故单凭症状诊断时,常对这一如此高的发生率估计不足。与之不同的是,上肢DVT较为少见,且较早的临床观察提示很少发生肺栓塞。有关 It is well-known that deep venous thrombosis (DVT) of lower limbs is the main cause of pulmonary embolism. Sensitive determination of pulmonary embolism and found that about 50% of lower extremity DVT patients with pulmonary embolism. Because pulmonary embolism can be asymptomatic or symptomatic but nonspecific or confused with many other symptoms, the diagnosis of this symptom alone often underestimates this very high incidence. In contrast, upper extremity DVT is less common, and earlier clinical observations suggest that pulmonary embolism is less likely to occur. related