Renal (Kidney) Scan

Scan with Vasotec


This scan evaluates the flow of urine through the kidneys into the bladder.

The Procedure:

  1. The entire procedure takes approximately 3 hours. When you arrive the nurse will start an IV and do assessments. If you are an inpatient, we may use your existing IV or INT.
  2. You will be injected with a low level radioactive material. It is not a contrast or dye and patients rarely have a reaction. The Nuclear Medicine technologist will do this injection through an existing IV or INT.
  3. If you are breast-feeding, pregnant or think you are pregnant you must inform your doctor.

Inpatient and Outpatient Preparation Instructions:

  1. Any discontinued drugs must be cleared through your doctor. We recommend that you discontinue the following medications to get an accurate test.
    • Captopril – (generic name Capoten) Do not take 72 hours before the scan.
    • Enalapril – (generic name Vasotec) Do not take 72 hours before the scan.
    • Lisinopril – (generic name Zestril) Do not take 72 hours before the scan.
    • Any other high blood pressure medications should not be taken one week or at least 72 hours before the scan.
    • All diuretics should not be taken 48 to 72 hours before the scan.
  2. Your creatinine levels should not exceed 2.5 mg/ml.
  3. Limit your sodium intake 2-3mg per day for 48-72 hours before the scan.
  4. You may eat prior to the scan.
  5. You must drink at least 32oz. of fluids before the scan.
  6. You should NOT go back on your antihypertensive (high blood pressure) drugs until the day after your test.

For Your Information:

The Radiologist (x-ray doctor) will read the scan and send the results to your doctor.


For your convenience we may schedule more than one test on the same day. This can be confusing because the tests may have different preparation instructions. If you are an outpatient and don’t understand the instructions please call Radiology. If you are an inpatient the nursing staff will correlate your test with the preparation.


There is a charge for the isotope injection that must be ordered before the scan. If it is necessary to cancel the scan, please call the Radiology department at 419-394-3335 extension 3528 as soon as possible.

Grand Lake Health System
200 St. Clair Street, St. Marys,
Ohio 45885-2400
| 1-419-394-3335 | 1-877-564-6897