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7 Cards in this Set
- Front
- Back
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Two types of renal scintigraphy and their RPH.
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1. Static renal scintigraphy gives info. about cortical anatomy
(99mTc-DMSA => renal cortex binding) 2. Dynamic renal scintigraphy gives functional info. (99mTc-DTPA => glomerular filtration, 99mTc-MAG3 => tubula uptake and excretion) |
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Indication of static renal scintigraphy.
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-presence of ectopic kidney localization
-evaluation of renal scar -differentiation b/t renal tumor and pseudotumor |
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Technique of dynamic renal scintigraphy.
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1 scitigram taken in every 10 sec. for 30 min. (ie. serial images)
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3 phases of renogram (time activity curve) in dynamic renal scintigraphy.
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1. blood flow phase (perfusion)
2. tubular uptake phase (funciton) 3. excretory phase (drainage) |
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What is diuresis renography?
Purpose and its technique. Results. |
Dynamic scintigraphy w/ furosemide (a loop diuretic) test.
Purpose: Determine whether the dilation of pelvico-calyceal system is due to obstruction or not. Technique: i.v. administration of furosemide for 20 min. after application of RPHs Results: - half-time of washout is < 7 min. = non-obstructive dilation - half-time of washout is > 15 min. = dilation due to obstruction - half-time of washout is b/t 7 and 15 min. = indeterminate study |
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What is captopril renography?
Purpose and technique. Results. |
dynamic renal scintigraphy w/ captoprial (ACE inhibitor) test.
Purpose: Evaluate renovascular hypertension Technique: Oral administration of catopril (500 mg) 1 hr before starting the dynamic scintigraphy. Results: +ive test = worsening of GF w/ narrowing of renal a. (decrease in accumulation of DTPA or "cortical retension" of MAG3) |
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Radionuclide evaluation of renal transplant:
Technique and possible results. |
Dynamic scintigraphy:
evaluate perfusion ~ 1 scintigram/sec ("first-pass study") evalutate function and excretion ~ 1 scintigram/10 sec. Possible results: 1). good perfusion but poor renal function => acute tubular necrosis 2). "black hole" => hyperacute rejection 3). bad perfusion, bad function => acute rejection 4). bad perfusion, bad function + urinary leak (tracer accumulates in area of leak) => chronic rejection |
