Precautions and contraindications before the examination: cystometry is contraindicated for those with recent acute urinary tract infections, acute urethritis, in order to prevent the spread of infection, sepsis and urethral fever; those who cannot place the manometry tube into the bladder due to urethral stricture or other reasons; and those with severe autonomic hyperreflexia who cannot perform catheterization. 1, imaging urodynamics examination is an invasive and invasive test, because of the examination process The following conditions may occur during and after the examination: a vesicoureteral reflux during the examination or urinary tract infection after the examination, resulting in fever b injury to the urethra and bladder mucosa, resulting in bleeding C temporary aggravation of the patient’s current symptoms, such as urinary incontinence, difficulty in urination, etc. d urine precipitate or flocculent material blocking the manometry catheter during the examination, resulting in examination failure e unsuccessful enema before the examination, defecation during the examination, resulting in failure of the examination f Other The doctor in charge should explain the examination in detail to the patient before the examination and sign the consent form for special examination (treatment). Before the examination, the patient must do urine routine and middle urine culture. If the laboratory results suggest urinary tract infection, the examination should be postponed and treated as appropriate until the results are normal before performing urodynamic examination. 2.Intestinal preparation During the examination, the rectal pressure is measured by placing a rectal manometry tube in the rectum. Patients need to take an enema with 110ml of glycerin enema the night before the examination to effectively remove the body’s stool and purge the intestinal gas in order to obtain a stable and accurate curve and value during the examination. If the intestinal tract is not sufficiently prepared, a large amount of intestinal gas will cause fluctuations in the manometry curve, the measured curve results will be false, the values will be inaccurate, the cystogram image will be blurred, and if the bowel is not purged, the rectal manometry tube will be dislodged during the examination and the examination will fail. 3.Preparation of skin The day before the examination, the patient should prepare the skin of the perineum to prevent infection and to facilitate the fixation of the catheter and electrode during the examination to ensure the successful completion of the examination. 4.Water preparation For patients who can urinate on their own, drink 300~500ml of water 1~2h before the examination, and ask the patient to hold urine, and when they feel they must urinate, discharge the urine into the measuring instrument to determine the urine flow rate. When the urine flow rate is measured, try to make the urine volume exceed 150ml, and measure the residual urine after the free urine flow rate is measured by catheterization. Patients with paraplegia or unable to urinate on their own should avoid drinking too much water within 2 hours before the examination, and should be catheterized after arriving at the examination room. To ensure that the bladder is empty before the examination and to improve the quality and accuracy of the examination. 5.Warmth Our department gives patients a sheet and saline for bladder irrigation to keep them warm during the examination to prevent them from getting cold and flu. If the patient has special needs and requirements, please inform the patient and family in advance, or bring your own blankets, quilts, etc. for use. Precautions after the examination: Ask the patient to drink more water appropriately after the examination. If there is vesicoureteral reflux during the examination or if the examination time is too long and special circumstances such as repeated intubation are required, antibiotic treatment can be given prophylactically for 1 – 2 days. If fever occurs within 3 – 5 days after the examination, urine examination can be performed promptly and please contact us promptly.