Outer needle tubing of puncture drainage needle tubing

The utility model discloses an outer needle tubing of puncture drainage needle tubing, the length of outer needle tubing is 67 -245mm, set up an inlet on the pipe wall of outer needle tubing, the inlet is rectangle, the width of inlet is 8.5mm, and length is 1.2mm, the inlet is located the intersection of needle tubing tip interface, washing liquid interface and drawing liquid interface, and this inlet with washing liquid interface intercommunication, the groove of compressing tightly has on the pipe wall of outer needle tubing, compress tightly the groove with the distance of the lower terminal surface of outer needle tubing is 10 -15mm. The utility model discloses an outer needle tubing of puncture drainage needle tubing, with inner syringe and three way connection post assembling, inside body fluid need can not be followed inner syringe through the suction and flowed collection cell or tissue that can be more abundant.