Kidney function scintigraphy enables a wide range of dysfunctions of one or both kidneys to be proven or excluded:
- Urinary obstruction
- Cirrhosis of the kidney(s)
- Reduced performance of one or both kidneys
- Performance assessment before operations in the case of chronic diseases (e.g. diabetes)
- Narrowing of kidney vessels in the case of high blood pressure
- Determining the clearance on each side
The examination is performed with the patient either lying down or standing. After a slightly radioactive, renotropic medicine has been administered intravenously, images of the kidney region/abdomen are produced for a period of 30 minutes. Here it is assessed how the medicine flows through the kidney vessels to the kidney tissue and from there to the renal pelvis and the ureter/bladder. Function graphs are also calculated which display the transport of the medicine through the kidneys in graphical form. The clearance of the kidneys on the left and right is recorded separately. Taking a blood sample at a defined time enables the clearance to be specified in figures and compared with a normal value.
To diagnose high blood pressure, if necessary an additional second examination with/without captopril may be necessary.
Before the examination begins, it must be ensured that a sufficient amount of liquid is supplied.
In the last 3-6 months before the kidney scintigraphy, no high doses of iodine should be taken, for example as are contained in X-ray contrast agents (computed tomography, intracardiac catheter) or in certain medicines (Cordarex).