Deep phlebothrombosis was found in 6 of the 10 cases who were performed color Doppler ultrasonography on the lower extremity while valve dysfunction was found in one case.

10行下肢静脉彩色多普勒超声检，6现深静脉血栓，1瓣膜功不全。

Objective: To study on the effect of normal saline and heparin dilution to prevent phlebothrombosis for patients after PICC tube indwelling.

研究生理盐水与肝液对经外周置入中心静脉导管(PICC)后静脉血栓的预防效果。