MAG III Renal Scan

An intravenous catheter (IV) will be inserted into your child’s vein. A radioisotope is injected through the IV. A catheter may be placed in the bladder to allow urine to drain freely during the test. A special camera is then used to take photos of the kidneys. The imaging takes place intermittently for about 20 minutes. After this time period a diuretic, called Lasix, is given to the child through the same IV. The diuretic causes the kidneys to produce more urine than normal during a small period of time. More images are taken at this point as well. Once all the images have been taken, the IV and the catheter (if used) is removed.

PURPOSE: This test is done to measure kidney function. It tells what percent each kidney is contributing to total function. This test may be ordered with or without Lasix medication.

HOW LONG: The scan takes 1 to 2 hours.

SEDATION: Required for certain age groups.

RESULTS: Often available right away.