The invention belongs to
medical instruments, and particularly relates to a
catheter which comprises a
catheter body, a
balloon, an imbedding unit and a first
control line, the
catheter body extends in the axial direction of the catheter body and is provided with a first cavity, and the first cavity is used for draining
urine in the bladder; the
balloon is installed on the catheter body, can expand and deform in the radial direction of the catheter body and is used for abutting against and being positioned on the bladder neck of the bladder; the imbedding unit is detachably connected to the catheter body and used for driving the catheter body and the
balloon to be imbedded into the bladder; the first
control line is connected with the catheter body, can penetrate through the imbedding unit and is used for driving the catheter body to be separated from the bladder. Therefore, the wearing comfort of a patient can be improved, the risk of
urethritis and
mucosal lesion is reduced, the catheter body can be conveniently pulled out, the
urination disorder possibly occurring after the catheter is pulled out is prevented, the autonomous
urination reflex function of the catheter is protected, and the
urination disorder possibly occurring after the catheter is pulled out is effectively prevented.