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| Illustration of the kidneys & urinary tract showing kidney stones |
Intravenous urography (IVU) is the close mutual imaging examination for the evaluation of the urinary system.
The contrast dye is injected into a vein inwards the arm, in addition to a serial of x-ray films is taken at timed intervals equally the cloth flows through the kidneys, ureters, in addition to bladder. The dye delineates these structures on the x-ray images in addition to reveals whatsoever abnormalities.
People who are dehydrated or those amongst impaired kidney function, which may tumble out amongst aging, high blood pressure, diabetes in addition to pump affliction may sense shrewd renal failure from infusion of the contrast dye. Adequate hydration earlier the examination tin cut back this risk.
Contra-indication of contrast admin
The contrast dye is injected into a vein inwards the arm, in addition to a serial of x-ray films is taken at timed intervals equally the cloth flows through the kidneys, ureters, in addition to bladder. The dye delineates these structures on the x-ray images in addition to reveals whatsoever abnormalities.
People who are dehydrated or those amongst impaired kidney function, which may tumble out amongst aging, high blood pressure, diabetes in addition to pump affliction may sense shrewd renal failure from infusion of the contrast dye. Adequate hydration earlier the examination tin cut back this risk.
Contra-indication of contrast admin
There are 2 principal contraindications for the direction of iodinated IV contrast: contrast induced nephropathy in addition to allergy to iodinated contrast.
Current policy suggests a creatinine of less than or equal to 1.5 mg/dl (133 umol//L) in addition to no bear witness of shrewd kidney injury for IV contrast administration.
The attention ER Radiologist in addition to the referring clinician may permit for patients amongst mild renal failure to have intravenous contrast when the risks are felt to hold out outweighed yesteryear the benefits
Current policy suggests a creatinine of less than or equal to 1.5 mg/dl (133 umol//L) in addition to no bear witness of shrewd kidney injury for IV contrast administration.
The attention ER Radiologist in addition to the referring clinician may permit for patients amongst mild renal failure to have intravenous contrast when the risks are felt to hold out outweighed yesteryear the benefits
The Department of Radiology’s policies permit patients who possess got had a severe anaphylactoid reaction to have IV contrast if the ER attention believes the written report is needed emergently in addition to the patient receives premedication.
.Patients who exclusively possess got i kidney or are kidney transplant recipients tin nonetheless have IV contrast; per departmental policy, the book of contrast volition hold out decreased.
Departmental policy states that patients taking Glucophage (Metformin) should possess got the medication withheld for 48 hours next contrast direction in addition to should possess got their renal role re-tested prior to re-starting.
Ref: Dept of biomedical imaging in addition to radiology, Yale School of Medicine. Updated 3/15.
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