Renal Flow and Scan with Captopril

You have been scheduled for a renal flow and scan with captopril, which involves the use of a small amount of radioactive material. The level of radioactivity used is extremely low and has no side effects.

Preparation for the procedure:
You need to be well hydrated prior to the scan. Please drink three glasses of water prior to the scan. Please inform the technologist if you are pregnant or breast feeding. The imaging may be changed, or special instructions given based upon that information.

Please inform the technologist if you are taking an ACE inhibitor medication such as captopen, vasotec, zestril, lotensin, monopril, prinivil, accupril, or altace. You should be taken off this medication for two days prior to the test. Please do not stop any medication without consulting your physician.

What to expect:
You will be asked to empty your bladder before we start the test. Once in the scan room an I.V. will be started in a vein in your arm. Your blood pressure will be taken and a technologist will give you two captopril pills to swallow. Your blood pressure will be monitored for sixty minutes. You will be asked to lie down on a table and a special detector called a gamma camera will take images from behind you. A technologist will give you an injection through the I.V. and we will image the blood flow to your kidneys for six minutes. You will then receive another injection through your I.V. and images will be taken for thirty minutes. You will be asked to empty your bladder again before images of your kidneys are taken with you sitting up. The technologist will then do some computer manipulation of the images to get information about blood flow as well as kidney function.

The images will be reviewed and the results will be sent to your physician. Your physician will discuss these results with you and explain what they mean in relation to your health.

Your questions and comments:
call (805) 563-5870.

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