Pre-examination precautions and contraindications For the recent acute urinary tract infection, acute urethritis, in order to prevent the spread of infection, sepsis and urethral fever is contraindicated catheterization; due to urethral stenosis or other reasons manometric catheter can not be placed into the bladder; severe autonomic hyperreflexia, can not be catheterized, are prohibited to carry out the cystometric examination. 1, imaging urodynamic examination is an invasive invasive examination, due to the need for catheterization, insertion of manometric catheter during the examination process, manometric catheter left in the urethra for a longer period of time, etc., the following situations may occur during and after the examination: a, vesicoureteral reflux during the examination or after the examination of the urinary tract infections, resulting in fever; b, damage to the urethra, the bladder mucosa, resulting in bleeding; c, temporary aggravation of the patient’s current symptoms, such as Urinary incontinence, urinary difficulties, etc.; d. Urine sediment, or flocculent obstruction of the pressure catheter during the examination, resulting in failure of the examination; e. Unsuccessful enema before the examination, defecation during the examination, resulting in failure of the examination; f. Other. Before the examination, the doctor in charge should explain the examination situation to the patient in detail and sign: special examination (treatment) consent form. In the examination before the patient must do urine routine and mid-stage urine culture, if the laboratory results suggest urinary tract infection, should be postponed to the examination of discretionary treatment, until the results are normal, before the urodynamic examination. 2, intestinal preparation During the examination, because of the need to place the rectal manometry tube in the rectum to measure the pressure in the rectum, the patient needs to use 110 ml of glycerin enema enema once a day and night before the examination, to effectively remove the body’s persistent feces, and to eliminate intestinal gases, so as to obtain a stable and accurate curves and values during the examination. If the bowel is not adequately prepared for bowel cleansing, a large amount of intestinal gas will cause fluctuations in the manometry curve, the results of the curve of the pseudo-image, inaccurate values, blurred cystography imaging, and those who have not been purged of persistent feces to defecate during the examination process, and the rectal manometry tube dislodgement, making the examination fail. Skin preparation One day before the examination, the patient should be given a skin preparation for the perineum to prevent infection, facilitate the fixation of the catheter and electrode during the examination, and ensure the smooth completion of the examination. 4, drinking water preparation for patients who can urinate on their own, 1~2h before the examination, patients drink 300~500ml of water, patients are asked to hold their urine, and when they feel the need to urinate, the urine will be discharged into the measuring instrument to determine the urine flow rate. Urine flow rate measurement, try to make the urine volume more than 150ml, determination of free urine flow rate after catheterization to measure the residual urine. Patients who are paraplegic or cannot urinate on their own should avoid drinking too much water within 2h before the examination, and should be catheterized in the examination room before the examination. To ensure that the bladder is empty before the examination, to improve the quality and accuracy of the examination. 5. Keeping warm Our department will cover the patient with a sheet and warm the bladder with saline water during the examination to keep warm and prevent the patient from catching a cold. If the patients have special needs and requirements, please inform the patients and their family members in advance, or bring their own blankets and quilts for use. Post-examination precautions After the examination, patients should be advised to drink more water as appropriate. Review the urine routine in time after the examination, if there is vesicoureteral reflux during the examination or the examination time is too long, need to repeat intubation and other special circumstances, preventive antibiotic treatment can be given for 1-2 days. If fever occurs within 3-5 days after the examination, urine examination can be carried out in time, and please contact us in time.