Does urinary examination require fasting?

Modern medicine is developing very rapidly, and a large number of medical achievements have emerged, providing solid protection for people's health. Among them, urinary system examination is a necessary item for people's physical examination. The urinary system examination is relatively strict and difficult, requiring patients to prepare in advance. For example, let's take a look at whether it is necessary to fast for a urinary system examination? I hope everyone can understand it.

Urinary system examinations generally do not require fasting, but the examination must be performed while holding urine. Some special examinations require fasting, such as intravenous urography, which requires fasting because the examination is conducted under X-ray. If there is a lot of gas or food residue in the intestines, it will affect the imaging effect. Renal function tests also require fasting blood draws. Renal function tests include electrolyte tests, and if blood is taken after eating, the accuracy of the electrolyte results will be affected. Other B-ultrasound, urine tests, CT scans, etc. do not require fasting, you just need to hold your urine.

Routine urology examinations and precautions:

A. Ultrasound imaging

1.Urinary system B-ultrasound: including kidney, bladder and prostate. Before the examination, the patient should be advised to drink 500-1000 ml of water to fill the bladder to facilitate the observation of lesions in the bladder and the prostate.

2. Ultrasound-guided puncture: mainly for the prostate. Before the operation, 330 ml of glycerin enema is injected three times to clean the feces in the rectum, reduce the chance of contamination and infection, and make the inspection field clear.

B. X-ray examination of the urinary system (KUB): namely, kidneys, ureters, and bladder. Note: Take 10 grams of senna leaves with hot water after dinner the day before the examination, and then fast for 12 hours.

2. Intravenous urography (IVP): to understand the morphology of the renal pelvis and calyces and the function of the contralateral kidney. Preparation before inspection is the same as KUB.

3. Retrograde urography: examination is performed through retrograde intubation of the cystoscope.

4. Cystography: for patients with bladder lesions who are not suitable for cystoscopy.

5. Urethrography: suitable for urethral stenosis, tumors, fistulas, deformities, etc. 6. Cystoscopy: visually observe lesions in the bladder.