Urethral function test

The urethral function test is an auxiliary test method for checking whether the urinary tract function is normal. Diabetic patients can have various types of bladder urethral dysfunction, namely diabetic neurogenic bladder and urethral dysfunction, which is ultimately fatal due to renal failure due to a stubborn urethral obstruction-infection-obstruction vicious cycle. Urodynamic testing is currently the most valuable test for determining bladder urethral function. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: not fasting Tips: Maintain normal sleep and diet. Normal value The urethral sphincter resistance was measured, and the normal person was 80-1OO cm water column. During normal urination, the bladder detrusor contractes, the intravesical pressure increases, and the extracorporeal sphincter muscle activity decreases or stops, resulting in a normal urinary flow rate curve. Clinical significance Abnormal results: (1) urethral closure pressure map, which is used for the diagnosis of urinary incontinence and neurogenic bladder, and also for the comparative examination before and after urinary incontinence surgery. (B) Determination of urethral sphincter resistance (3) Sphincter EMG When the synergy is disordered, the detrusor contraction, while the external urinary sphincter activity is not weakened, still in a paralyzed state, the urinary flow rate curve of poor urination occurs; or the detrusor has no contraction, and the urethra The external sphincter activity is weakened, resulting in urinary incontinence. People who need to be examined: those with abnormal urethra. Precautions Taboo before check: Maintain normal sleep and diet. Requirements for inspection: Strict aseptic operation, resulting in iatrogenic secondary infection, careful operation during intubation, so as not to hurt the organ. Inspection process (1) urethral closure pressure map, a special thin catheter is inserted into the bladder, and is automatically and slowly pulled out from the urethra by an automatic retractor. At the same time, carbon dioxide gas or liquid is injected to discharge it from the small hole at the front end of the catheter. The transcatheter transducer continuously measures the full-length internal pressure of the urethra and automatically plots the intraurethral pressure curve, ie the urethral closure pressure map. The maximum pressure of the urethra is thus determined. Parameters such as maximum urinary closure pressure and functional urethral length. Another urethral pressure measuring catheter with electrodes can simultaneously check the urethral closure pressure map and the external urinary sphincter EMG. (B) urinary sphincter resistance measurement, the F ~ 16 catheter into the ball urethra, connected to a three-way tube, one end connected to a pressure gauge, the other end of the sterile saline bottle. The liquid is continuously dripped into the urethra, and the penis is gripped by hand to prevent the liquid from escaping from the urethra. The water column in the piezometer rises to the highest level, which is the urethral sphincter resistance. (3) Sphincter electromyography, the external urethral sphincter and the anal sphincter are controlled by the pudendal nerve. The electromyogram of the external anal sphincter is recorded by an electrode piercing the external anal sphincter or an electrode plug inserted into the anus, which reflects the external urinary sphincter. Not suitable for the crowd Inappropriate people: those with urinary tract infections. Adverse reactions and risks No related complications or hazards.

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