Radiology

I-125 Glofil (GFR) Test

What is an I -125 Glofil (GFR) Test?

What should you do prior to your child's exam?

What should you do when you arrive?

What should you expect during the exam?

What should you do after the exam?

Test Results

What is an I -125 Glofil (GFR) Test?

An I-125 Glofil (GFR) test is a blood test that measures the Glomerular Filtration Rate of the kidneys. More simply, this is a test that measures kidney function.

This test requires an injection of a radiopharmaceutical, as well as blood samples taken, through an IV catheter. There are no images or pictures taken during this study.

What should you do prior to your child's exam?

Your child should not have iodinated contrast media 24 hours prior to the exam.

All children must have SSKI drops before this procedure. The drops are used to protect your child's thyroid from the radioactive portion of the medicine we inject during the study.They are given the day of the exam by the Nuclear Medicine staff.

Note: Parents will be allowed to accompany the child into the exam room. It may be helpful to make other arrangements for siblings.

What should you do when you arrive?

If your appointment is scheduled at the Main Hospital:

You must check in to Outpatient Registration, on the third floor of the Main Hospital, 45 minutes prior to your scheduled appointment. This is where your registration process occurs.

The law requires that you bring a prescription from your doctor's office stating the exam to be done and the reason for it.

If your insurance requires a referral, it must be presented at the time of registration. Proof of insurance will also need to be provided at this time.

Once the registration process is completed, the Nuclear Medicine Department will be notified. A technologist or nurse will come out to the central registration area and bring you and your child to a room for IV placement.

If your appointment is scheduled at the Pediatric Imaging Center at King of Prussia:

You must check in at the main registration desk, located in the main waiting room, 45 minutes prior to your scheduled appointment. This is where your registration process occurs.

The law requires that you bring a prescription from your doctor's office stating the exam to be done and the reason for it.

If your insurance requires a referral, it must be presented at the time of registration. Proof of insurance will also need to be provided at this time.

Once the registration process is completed, you will be directed to the Radiology waiting room. The Nuclear Medicine technologist will be notified and a technologist or nurse will come out to the Radiology waiting room and bring you and your child to a room for IV placement.

What should you expect during the exam?

A technologist or nurse will place an IV in your child for the radiopharmaceutical injection needed for this exam.This IV tube will be placed in the child's arm, hand, or foot. Your child will only feel a little discomfort, like a mild pinch. Once the child has proper IV access, the test can begin.

A blood sample will be drawn from your child through the IV catheter previously placed. After, your child will be injected with the radiopharmaceutical (I-125). Blood samples are taken at 5 minutes, 10 minutes and 15 minutes after the injection. You and your child may then leave the Nuclear Medicine department and will be given scheduled times to return.

Typically your child will need to return at 2 hours, 2.5 hours and 3 hours after the injection for additional blood draws. These times may be adjusted however, based on your child's age, weight, or other contributing factors. Again, all blood samples will be taken through the IV catheter placed at the beginning of the study.

Child Life Specialists are available to answer questions you might have about how to prepare and support your child during the procedure. A child life specialist can also be present at the time of your child's appointment to explain the procedure in developmentally appropriate ways using well established preparation materials. The specialist can also be available to help implement distraction techniques to help your child better cope with the stress of the hospital experience. Please call 215-590-2001 or click the link above for more information. If your child's procedure is scheduled for the Pediatric Imaging Center at King of Prussia, you can call the Child Life Specialist directly at 215-590-3069.

What should you do after the exam?

There are no special instructions for your child to follow upon completion of this procedure.

Test Results

Processing of the test takes a few hours and results are usually available the following day.

If your physician has any questions regarding the report, he/she may call 215-590-2584.

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