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19 Cards in this Set
- Front
- Back
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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 name of the drug used in conjunction with a renogram to diagnose or exclude renovascular hypertension?
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Captopril
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What preparation is necessary for this study?
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Patient must be well hydrated, and should void before injection and after study is completed.
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Any contraindications? If so, what are they?
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No iodine contrast studies within 24 hours of exam, dehydration, pregnancy, breast feeding, no diuretics, and patient movement.
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What type of collimator is used?
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Low energy, high resolution (LEHR), parallel hole
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What kind of images are obtained during this study?
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Statics and dynamics
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How long after the injection should imaging begin?
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Immediately, static images @ 1, 3, 5, 10, 15, 20, 25, 30 minutes up to one hour.
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How long does this study usually take to complete?
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Approximately 1 hour
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If a flow study is required, for how long should each image be obtained? How long for the dynamic images? Statics?
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2 seconds/frame for 1 minute (flow), 30-60 seconds/frame, 20-30 minutes for dynamics, and 500,000 counts for statics.
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How many images should be in a data set?
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30 images (flow), 45-60 (dynamic)
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Is there any special equipment used during this exam? If so, what are they?
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yes; Blood pressure cuff
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What radiopharmaceutical is used for a captopril study and what is the adult dose?
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Tc-99m - DTPA, 5-15 mCi
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What is another radiopharmaceutical that can be used for this study? What is the adult dose?
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Tc-99m - MAG3, 5-10 mCi
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How much Captopril (mg) is orally administered during the procedure?
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25-50 mg
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What is the mode of localization for Tc-99m - DTPA?
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Glomerular Filtration
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In what position is the patient situated before the study?
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Supine
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What views are taken of the patient's body?
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Posterior
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What are considered normal results for a Captopril study?
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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) with 12-15 minutes,
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What are considered abnormal results for a Captopril study?
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Non-visualization of one or both kidneys, decreased activity, pyelonephritis, enlarged kidneys, Renal artery stenosis, hydronephrosis, elevated blood pressure
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