Cystometry of the bladder: diagnostic features

Diagnostic method to study the pathological changes in the performance of its bladder functions is called cystometry. The study provides an opportunity to set the capacity of the bladder, and the pressure inside it in the filled and empty States. Also, the procedure enables to evaluate the work of the urethra and detrusor. How is cystometry? How to prepare for the diagnostics of the bladder?

What performance bladder are the norm?

Good say on such indicators:

  • not less than 50 ml of residual urine;
  • bladder volume 400-600 ml;
  • coughing cannot cause the leakage of urine;
  • there are no systolic detrusor contractions;
  • the first urge to urinate between 150-200 ml;
  • the increase in detrusor pressure not more than 15 cm of water.St. when standing up and filling;
  • the increase in the detrusor pressure of less than 70 cm of water.St, peak urinary flow rate more than 15 MS/s during urination.

When is cystometry?

Indications for the procedure are the following:

  • surgical treatment of urinary incontinence have not been successful;
  • about urination;
  • difficulty urination;
  • the increase in amount of urine;
  • neurogenic bladder;
  • pain in the bladder, if there is an inflammatory process;
  • incomplete emptying of the bladder;
  • preparatory stage for the first surgery for urinary incontinence.


If necessary, the holding of cystometry, the patient should inform the doctor about such facts:

  • the presence or suspected pregnancy;
  • allergic reactions to medications, anesthetics, latex;
  • accept for the moment the medication;
  • low blood clotting, or treatment for rasirivanje blood. Before performing the diagnosis, the doctor may cancel their appointment.
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Just before carrying out the diagnostics cystometry or the day before, the doctor prescribes antibiotic. For patients with constipation, the recommended enema.

During the procedure cystometry the patient remains in the hospital. The course of the study may vary depending on the severity of the patient.

The patient undresses and removes all items that are detrimental to the study. After that, the emptying of the bladder, during which is conducted uroflowmetry.

The patient lies on a table and the doctor performs the introduction of the catheter into the bladder. Then introduces an additional catheter in the vagina or rectum. They are connected to cystometry.

The bladder is slowly injected gas or liquid, and record the indicators at different stages. Sometimes medication may be administered the drug, affecting the muscle tone of the bladder, after which the study continues. Fill rate 10-100 ml/min In the process of filling, the patient should inform the doctor about the first and imperative urination, which are recorded by a doctor.

He also notes the presence of urgency, pain, systolic contraction of the detrusor, factors provoking them (cough, the sound of water, which pours). There is an increase in pressure during filling or getting up. After reaching the maximum volume of the catheter, through which is injected a solution or gas is removed (the rest of the catheters remain), the patient stands up. The doctor asks you to cough, making a note of any expiration of urine.

Duration cystometry is 40-60 minutes, and the results of the study of the bladder it is possible to tell immediately after its completion.

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Possible risks and side effects

In most cases, a diagnostic procedure of cystometry well tolerated. Side reactions are extremely rare, with the exception of discomfort during urination, which are temporary and quickly pass. Also, the urine may contain a small amount of blood as a result of injury to the catheter. These symptoms pass by themselves and don’t need any treatment.

Immediate access to a doctor is necessary if the following symptoms:

  • the amount of blood in the urine increases;
  • constant pain in the abdomen;
  • chills or fever;
  • decrease in urine.

Even if only one symptom is required consultation of the doctor to avoid further complications.