Renography - technique , indications, patient preparation


1. Contraindications

2. When appointed?

3. How to prepare?

Radionuclide renografiya - a radiological method for detecting abnormalities and kidney research using radioactive marker that accumulates in these organs of the urinary system.

Renography to evaluate kidney function, as well as the rate of urine excretion.The study is generally used to monitor clinical surgery after a kidney transplant.In addition, radioisotope renografiya assigned to assess the dynamics of the renal processes.

procedure is based on the property located in the renal tubular epithelial tissue is selectively removed from the blood hippuran (radioactive substance) and remove it together with the urine out of the body.The accumulation and excretion hippuran fixed with scintillation detectors.

Radionuclide renografiya kidney carried out in a sitting position.On the skin of the kidney, heart and large vessels detectors are installed.Initially, the patient is injected intravenously radioactive component.

Then radiograph takes pictures, which show the curves of the dynamics of accumulation hippuran and cleanse the blood from the reagent.All research may take 20-30 minutes.

resulting images are evaluated with regard to the shape and curve segments.These include vascular, secretory and excretory segments.When analyzing the image taken into account the fact that the achievement of the highest level of the curve is normally 3-4 minutes, and the half-life (when the curve is reduced by half) is 10-12 minutes.The difference between those of both kidneys should not exceed 20%.


Radionuclide renografiya kidney is relatively simple, has no contraindications, does not cause complications not exhausting for the patient, safe and inexpensive.This study is currently considered one of the most objective methods of diagnosis.

When appointed?

Renography kidneys used for early diagnosis of dysfunction paired organs of the urinary system and assess their condition after surgery, as well as the study of the dynamics of kidney processes.As a rule, radioisotope renografii prescribe for separate evaluation of the two kidneys and then comparing the symmetry of the curves.Changes in segments make it possible to establish the degree of renal work.

In most cases renografiya radioisotope used in case of unilateral renal artery lesions.When amyloidosis and glomerulonephritis usually a bilateral lesion in the form of curves for the parenchymal type.With the progression of nephropathy excretion hippuran more changes and fluctuations curve difference decreases.

In general, the method of radioisotope renal renografii makes it possible to evaluate the urodynamics of the upper urinary tract and kidney cleansing ability tubular apparatus to detect irregularities in the functioning of the bodies, identify complications, as well as choose the best treatment.

How to prepare?

special training radioisotope renografiya kidneys from patients is not required.This study is conducted on an outpatient basis.With regard to the appointment of renografii contraindications, they are absent.The procedure is allowed to conduct all patients (even the seriously ill).

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