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8 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What are the 2 types of renal imaging agents and what are they?
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those which show morphology and those which show function
DMSA used for morphologic studies (2-6 mCi) and MAG3 (5-10 mCi) for functional |
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Functional agents should have the following characteristics:
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1. ERPF agent – completely removed from plasma during its passage through the kidney. This means that all the activity delivered to the kidney remains in the kidney. (high first pass extraction)
2. GFR agent- freely filterable by the glomerulus 3. Not protein bound 4. Not metabolized 5. No significant excretion by other organs |
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How is MAG3 removed from the plasma?
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by the renal tubules
99mTc- Mertiatide (MAG3) is the most common agent used for the measurement of ....?. |
99mTc- Mertiatide (MAG3) is the most
common agent used for the measurement of effective renal plasma flow (ERPF). |
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99mTc-DTPA is removed from the plasma almost entirely by _______________. DTPA allows for calculation of the ____ and also produces a good image.
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99mTc-DTPA is removed from the plasma almost entirely by glomerular filtration. DTPA allows for calculation of the GFR and also produces a good image.
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When a patient does not respond to lasix what does this mean?
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they have an obstruction that the dialation effects of lasix will not clear
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What causes renovascular hypertension?
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a narrowing of the arteries that carry blood to the kidneys
what is given to pt to counteract ACE to dialate arteries,known as ACE inhibitor? |
Captopril
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What is a positive scan with MAG3/Captopril?
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Patients with normal renovascular pressure will maintain the GFR when given captopril, resulting
in a normal study. Patients with renovascular hypertension will have a decrease in GFR because of the effect of the drug, resulting in a positive study. |
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What is RAS and what happens to the kidney with this condition?
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Renal Artery Stenosis, it atrophies through ischemic nephropathy which can lead to renal failure. The other kidney is at risk as well as a result of hypertension
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