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What is residual urine in the bladder and what is its diagnostic value?

When measured after urination, residual urine in the bladder, the rate is 30-40 ml in adults and 3-4 ml in children. When exceeding 50 ml, should consult a doctor. It is important to note that this phenomenon is not considered a separate disease, but a symptom of another more complex pathological process.

The risk of exceeding norms is that without treatment the residual urine in the bladder will increase, which can create huge problems. In addition, the disease that produced the symptom will progress. Complications that gives this problem, can lead to impaired functioning of the kidneys, chronic cystitis, pyelonephritis, nephropathy, reflux, diverticula. In rare cases, can occur even hydronephrosis.

The concept of residual urine

In the General case, the residual urine is considered normal, if the number after the discharge does not exceed 10% of the bladder. The danger is that at first does not feel significant discomfort or pain. Just a little longer urinary process a little more often. This is what contributes to the fact that the disease develops into a more severe stage. But it then leads to complications and difficulties in treatment.

The second stage is characterized by more overt manifestations, but there are more chances to confuse with a cold, for example. Back pain, fever, chills - all these ambiguous symptoms. Normal or no residue of urine after emptying, to check many people, having no medical knowledge, just do not come to mind. This gives rise to some neglect on the part of the patient.

Аденома простаты

In some cases, a urodynamic study:

  1. Uroflowmetry. Measurement of the volume of urine emitted over time.
  2. Cystometry. Measurement of pressure in the bladder during the emission of urine.
  3. Electromyography. Used to evaluate muscle function of the bladder.
  4. Writeprofilestringa. Quality assessment of the functioning of the sphincters and the walls of the urethra.

These tests are necessary not only for diagnosis incomplete emptying of the bladder, how much to clarify the causes of this phenomenon.

In addition, men additionally appointed examination of the prostate gland, usually through rectal palpation or ultrasound. The latter is very informative, because it allows you to examine the prostate in the immediate vicinity. Rectal ultrasound makes it possible to accurately determine whether prostate hyperplasia, or deformation of the intestines, detected on palpation, has other reasons. Thus, ultrasonography is extremely important.


Directlytherapy that effectively allowed us to normalize the bladder, no, because, as noted earlier, it is not an independent disease but a symptom of other, more serious pathology. The treatment prescribed for the disease that produced the symptom. With successful treatment of the disease, the problem of residual urine in the bladder is also removed.

An additional factor of treatment is antibiotic and uroseptic drugs that prevent the development of bacterial infections and secondary complications, yet be treated the underlying disease.

As a prevention, with atony of bladder muscles, to prevent stretching of the walls of the last are assigned the crankcase to drain urine. In this case, partial loss of sensitivity produced a reflex urine output hourly. It is important to prevent stretching of the bladder wall, or the problem with its devastation becomes chronic.

Additional references: Vishnevskiy, A. A., Livshitz V. A. Diseases of the genitourinary system.