Catheter

The invention discloses a catheter which comprises a head end, a tube, a connector, a guide wire and a handle. One end of the tube is communicated with the head end, and the other end of the tube is connected with the connector; the guide wire movably stretches into the tube, the first end of the guide wire can stretch into the head end, and the second end of the guide wire movably penetrates through the connector and then is connected with the handle; the tube is made of full-imaging TPU raw materials, and the adding proportion of contrast media is 20%-50%. According to the catheter, the large flow in an inner cavity of the tube is guaranteed, and meanwhile the supporting property of the tube is good, so that the catheter can be conveniently placed; lubricating treatment is performed on the inner wall of the tube and the outer wall of the guide wire, therefore, the surfaces are smooth, tube blocking is prevented, the guide wire can be inserted and pulled smoothly, and the resistance is small; the head end adopts a side-cut liquid outlet, the resistance is small, and the liquid outlet quantity is large; the head end is in the shape similar to a bullet head, a circular arc surface serves as the stress surface when the catheter is placed, and therefore the mucosae can not be scratched; the head end is formed through insert molding, transition between the head end and the tube is smooth, and no step feel exists when the transition portion is touch with the hand.