Ch40 Renogram

  1. Normal renogram curve?
    Normally, the curves show rapid uptake (flow curve on left) and rapid drainage (function curve on right). Each kidney is plotted separately. 

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  2. Perfusion panal and drainage panal
    • Perfusion panel - Notice that the time intervals are in seconds. Both kidneys show prompt uptake, but the right kidney doesn’t get quite as bright.
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    • Drainage panel - The left kidney shows prompt drainage, but the right kidney retains the radionuclide even in the last image. 
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  3. Types of O`reilly Curves in renogram?
    • Type I—normal response

    • • Type II—obstructive response (high-pressure system)
    • – no response to frusemide
    • – Inconclusive if GFR <15mL/min

    • • Type IIIa—dilated but not obstructed (low pressure/ hypotonic system)
    • – stasis rather than obstruction
    • – prompt elimination following frusemide injection

    • • Type IIIb—equivocal response
    • – languid response to diuretic
    • – Repeat study with F-15

    • • Type IV—delayed compensation (Homsy’s sign)
    • – “double peak” response to diuretic
    • – F-15 diuresis often reveal obstructed pattern

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Card Set
Ch40 Renogram