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33 Cards in this Set
- Front
- Back
What are the indications for a diuresis renogram?
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To assess renal function and urodynamics, to determine what percent of total renal function is contributed to the kidneys.
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What is the patient preparation for a diuresis renogram?
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Patient must be well hydrated, give 5-10 ml/kg of water 30-60 minutes prior to the injection of the radiopharmaceutical. Patient should also void before imaging begins and frequently after imaging is done.
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What are the contraindications for a diuresis renogram?
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No iodine contrast studies within 24 hours of exam, dehydration, pregnancy, breastfeeding, no diuretics prior, and patient movement.
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What camera is used for a diuresis renogram? What kind of collimator is used?
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Gamma Camera, Large field of view.
LEHR, parallel hole |
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What kind of images should be obtained during this study?
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Dynamic and Static images
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At what time should imaging begin after injection of the radiopharmaceutical?
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Immediately. Some wait 10 to 15 minutes after injection for patients with known obstruction.
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What is the total imaging time for a diuresis renogram?
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30 minutes to 1 hour
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What is the primary radiopharmaceutical that is used for a diuresis renogram? What is the dosage? What other radiopharmaceutical can be used?
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Tc-99m - MAG3
5 - 10 mCi Tc-99m - DTPA (5-15 mCi) |
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What is the mode of localization for MAG3?
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Glomerular Filtration
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At what position do we situate the patient before imaging?
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Supine
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What views of the patient's body are taken?
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Posterior
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What are considered normal results of a diuresis renogram?
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Homogenous distribution of the Rph in both kidneys, normal results with furosemide T 1/2 washout time from injection is typically at <15 minutes, 15-20 minutes is indeterminate. Curves are declining and continue to do so after administration of diuretic.
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What are considered abnormal results of a diuresis renogram?
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False-positive results and equivocal interpretation may arise when a diseased kidney is not responsive to furosemide injection (such as w/ immature renal function in neonates, severe dehydration, and poor baseline renal function) and the collecting system is dilated, and VUR or fully distended bladder is present.
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What is the name of the inner zone of the kidney?
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Medulla
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What is the name of the outer zone of the kidney?
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Cortex
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What is the basic functional unit of the kidney called?
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Nephron
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What are the indications for an ACE Inhibitor renogram?
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To diagnose or exclude urinary tract obstruction, to assess renal function and urodynamics, to determine what percent of total renal function is contributed to each kidney, renal perfusion, and trauma.
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What is the patient preparation for an ACE Inhibitor renogram?
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The patient must be well hydrated, and should void before injection and after procedure.
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What are the contraindications for an ACE Inhibitor renogram?
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No iodine contrast studies within 24 hours of exam, dehydration, pregnancy, breastfeeding, and patient movement.
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What kind of camera is used for an ACE Inhibitor renogram? What kind of collimator is used?
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Gamma, Large field of view
LEHR, Parallel Hole |
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What kind of images are obtained during an ACE Inhibitor Renogram?
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Dynamic and Static Images
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How long after injection of the radiopharmaceutical should imaging begin?
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Immediate statics @ 1, 3, 5, 10, 15, 20, 25, and 30 minutes up to one hour.
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What is the total imaging time this procedure?
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Approximately 1 hour
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If a flow study is required, what is the timing per image? Dynamics? Statics?
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2 sec/frame for 1 minute
30-60 sec/frame for 20 to 30 minutes. About 500 kcts for statics |
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Number of images in a data set for either a diuresis renogram or ACE Inhibitor renogram?
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30 images for flow, 45-60 images for dynamics and statics
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What is the ancillary equipment for an ACE Inhibitor renogram?
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Blood pressure cuff
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What is the name of the pharmaceutical given during an ACE Inhibitor renogram? How much is given?
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Captopril
50 mg, PO |
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What radiopharmaceutical is used for an ACE Inhibitor study? What is the dosage? What can also be used?
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Tc-99m - DTPA, 5-15 mCi
or Tc-99m - MAG3, 5-10 mCi |
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What is the mode of localization of the radiopharmaceutical?
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Glomerular Filtration
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What is the patient position?
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Supine?
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What views of the patient's body are taken during an ACE Inhibitor renogram?
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Posterior
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What are considered normal results for an ACE Inhibitor renogram?
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Normal blood pressure range (baseline), homogenous distribution in both kidneys, static images should be symmetrical, time-to-peak concentration is 3-5 minutes, and clearance of Rph (T1/2) within 8-12 minutes.
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What are considered abnormal results for an ACE Inhibitor renogram?
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Non-visualization of one or both kidneys, decreased activity, pyelonephritis, enlarged kidneys, RAS, hydroureteronephrosis, elevated blood pressure.
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