Bladder residual urine volume measurement

The residual urine volume of the bladder is measured by catheterization or B-mode ultrasonography immediately after urination to determine residual urine volume in the bladder. Under normal conditions it is less than 5 ml. The appearance of residual urine indicates that the bladder urination function has been compensated. Residual urine volume is directly proportional to the degree of lower urinary tract obstruction. In the course of treatment of lower urinary tract obstruction, repeated determination of residual urine volume can determine the efficacy. Through this examination, the corresponding symptoms can be judged. Basic Information Specialist classification: urinary examination classification: urine / kidney function test Applicable gender: whether men and women apply fasting: not fasting Tips: Take a non-contaminated urine specimen for inspection. Normal value Under normal conditions it is less than 5 ml. Clinical significance Abnormal results: the appearance of residual urine indicates that the urinary function of the bladder is incomplete, and the amount of residual urine is proportional to the degree of lower urinary tract obstruction. People who need to be examined: those with abnormal bladder detrusor function should be examined. Precautions Check the taboo: The contraindications for catheterization are acute urethritis, especially when purulent infection, catheterization may cause infection spread. Patients should be encouraged to urinate on their own to avoid unnecessary catheterization, especially multiple catheterizations. If necessary, the catheter can be indwelled. Male patients should use metal catheters as little as possible. Requirements for inspection: 1. Cyst flushing or intravesical drug perfusion through the catheter; 2. Urinary retention caused by various reasons; 3. Before and after pelvic surgery such as bladder and prostate, the catheter should be indwelled after urethra; 4. Bladder urethrography or vesicoureteral reflux angiography; 5. Bladder pressure measurement. Inspection process There are three methods for measuring: transabdominal B-ultrasound, catheterization and intravenous urography. 1, the patient with abdominal B-ultrasound measurement without any discomfort, is the most commonly used method. It does not cause urinary tract infections, especially in patients who need to repeatedly measure residual urine volume during treatment, but this method is not accurate enough. 2. The catheterization method is to insert a catheter to drain urine after the patient has urinated, and to measure the residual urine volume. This method is accurate and reliable, but causes discomfort to the patient and is not easily accepted by the patient. 3, intravenous urography is in the intravenous urography, in the bladder filling period and after urinary film, observe the residual urine volume, this method can not be quantified, practical value is not large. Not suitable for the crowd Inappropriate people: Generally, there is no suitable for the crowd. Adverse reactions and risks No obvious complications and harms.