Schedule your scan at least 2 hours after your last urination to ensure accurate results. Avoid diuretics for 24 hours prior to the test.
Before the scan: You’ll need to drink plenty of water beforehand to ensure your kidneys are properly hydrated. Your doctor will provide specific instructions regarding fluid intake. This helps ensure clear images.
During the procedure: A small amount of radioactive material will be injected into a vein. You’ll lie still while a special camera creates images of your kidneys. The Lasix injection follows the initial scan; it helps highlight kidney function by stimulating urine production. The whole process usually takes about 1-2 hours.
After the scan: You can resume your normal activities immediately. Increased fluid intake helps flush the radioactive material from your body. Expect a slight increase in urination. The results are usually available within a few days. Your doctor will explain the results and discuss any necessary follow-up appointments.
Potential side effects from the radioactive tracer are minimal and temporary. These may include mild nausea or a slightly warm feeling at the injection site. Report any unusual symptoms to your doctor immediately.
Interpreting Results: The scan measures how efficiently your kidneys filter waste from your blood and how quickly that waste is excreted. Your doctor will compare the rate of excretion before and after the Lasix injection to diagnose potential problems, such as blockages or reduced blood flow.
Specific Conditions Diagnosed: This scan is valuable in diagnosing various renal issues, including renal artery stenosis, vesicoureteral reflux, and kidney obstructions.
