Disposable midline catheter kit for venous blood sampling or transfusion in short term

The invention provides a disposable midline catheter kit for venous blood sampling or transfusion in a short term. The disposable midline catheter kit comprises a midline catheter, a guide steel wire,a puncture needle and a catheter fixer, a cannula seat and a catheter seat are detachably and fixedly connected through a locking thread, a catheter penetrates through the catheter seat and is detachably connected inside the catheter seat through a rivet, a guide sleeve is arranged at the end, away from the catheter seat, of the catheter, a first protective sleeve is arranged outside the catheterin a sleeving mode and fixedly connected with the catheter seat, a guide wire penetrates through a push tube and extends to the outside of the push tube, a second protective sleeve is arranged at theexposed position of the guide wire in a sleeving mode, a needle tube is fixedly arranged on a needle tube base, a third protective sleeve is fixedly connected with the needle tube base and arranged outside the needle tube in a sleeving mode, and two fixing wings are symmetrically and fixedly arranged on the two sides of a fixing clamp. According to the disposable midline catheter kit, puncture injuries are reduced, catheter blockage after blood return can be effectively prevented, the risk of accidental extraction of the catheter is reduced, the stability of the catheter is guaranteed, temporary material configuration during an operation is avoided, the infection risk is reduced, and catheter flushing and preparation before puncture are facilitated.