In clinical practice, urinary flow rate is examined mainly by urodynamic instruments. For men to check urodynamics, urine can be performed in a normal state, and urine is discharged into a container to observe the smoothness of urination in the natural state, as well as the time and strength of urination, and then urethral cannula and internal anal pressure tube are placed, and then the patient is instructed to urinate. Before that, some saline will be instilled into the bladder, and when a certain urge to urinate is reached, the response of urination will be triggered, and the physiological process of real human urination will be reflected through a sensitive probe. The urodynamic test not only measures the urinary flow rate, but also clearly determines the functional state of the bladder, such as the coordination of the bladder’s forceps and the effect of intra-abdominal pressure on the voiding reflex, all of which can be examined in a targeted and clear manner.