Conclusions High ligation is no better than nulli-high ligation, the letter does not increase incidence opportunity of deep phlebothrombosis and lung embolism.

• 结论没有证据表明行大隐静脉激光闭合术时首先行高位结扎更有优势,未高位结扎并不增加深静脉血栓形成及肺栓塞的发生机会。