Urethral dilator bending angle between straight tube section 3 and head 4 is between 90° ~ 120°. The urethral dilator is an auxiliary therapeutic instrument, by emulating the physiological anatomy of the urethra, acting on the urethra, so that the urethra is expanded and the symptoms of dysuria are relieved, and it is mainly used in clinical practice for the treatment of urethral stenosis, dysuria, postoperative dilation of the urethra, etc. According to the physiological curvature, the angle of the urethral dilator bending angle is between 90° ~ 120°, and the dilator is placed in the bladder smoothly through the bend of the urethra. Urethral dilator is mainly composed of dilator and filamentous probe, the use of urethral rigid probe, the flexibility of the guidewire into the urethra, in the guidewire guided urethral dilator dilatation tube into the urethra, for the treatment of urethral stenosis, urinary difficulties and so on. If you want to use the urethral dilator, it should be carried out under the formal guidance of the doctor.