Disposable prevents thrombus and keeps somewhere needle

The utility model discloses a disposable prevents thrombus and keeps somewhere needle, it is by pipe, pipe seat, elasticity extension pipe and end that liquid presss from both sides or these essential elements of two -way cock constitute, and wherein, the pipe is installed in an end of pipe seat, and elasticity extension guan ze is through pipe seat side joint head fixed connection and only pass that liquid presss from both sides or the two -way cock. It adopts specific technical measures, makes that end that liquid presss from both sides or the two -way cock rotates and can not be along the round trip movement of elasticity extension pipe around elasticity extension pipe. The elasticity extension pipe that it can avoid ending between liquid clamp or two -way cock and the pipe seat effectively bending or the phenomenon of trembling appear and produces elasticity extension pipe lumen volume change to ensure not take place the medical malpractice of thrombus at whole infusion in -process, but wide application in various clinical infusions.