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Accurate diagnosis and effective prevention are critical in managing Acute Kidney Injury (AKI), which is linked to high mortality rates ranging from 10% to 80%. Timely recognition of at-risk patients and careful monitoring can significantly reduce the likelihood of kidney damage.Diagnostic Assessments:The diagnostic process starts with a comprehensive medical history to identify prerenal, intrarenal, and postrenal causes.Prerenal causes, such as dehydration, hypotension, or blood loss, should...
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Imaging Studies VII: Vascular Imaging01:19

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DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Risk of Acute Kidney Injury Following Gadolinium-based Contrast Agent-enhanced MRI: Propensity-matched 7-year Cohort

Min Woo Han, Pyeong Hwa Kim, Chong Hyun Suh

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    Gadolinium-based contrast agents (GBCAs) do not increase the risk of acute kidney injury (AKI) in patients undergoing MRI. This safety finding holds true across various levels of kidney function, indicating GBCAs are well-tolerated.

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    Area of Science:

    • Nephrology
    • Radiology
    • Pharmacovigilance

    Background:

    • The kidneys are crucial for eliminating gadolinium-based contrast agents (GBCAs).
    • Renal function may influence the risk of GBCA-associated adverse drug reactions (ADRs), including acute kidney injury (AKI).

    Purpose of the Study:

    • To determine if GBCA administration elevates the risk of AKI.
    • To explore the relationship between renal function and the incidence of GBCA-associated acute ADRs.

    Main Methods:

    • Retrospective review of 35,197 adult MRI examinations (January 2015 - June 2021).
    • Analysis of baseline estimated glomerular filtration rate (eGFR), serum creatinine, and GBCA-associated ADRs.
    • AKI diagnosis based on KDIGO guidelines; propensity score matching and inverse probability of treatment weighting used for bias adjustment.

    Main Results:

    • A significantly lower incidence of AKI was observed with GBCA enhancement (OR, 0.59; P < 0.001), consistent across eGFR levels (>60 and 30-60 mL/min/1.73 m2).
    • No significant association was found between baseline eGFR and the rates of GBCA-associated acute allergic-like or physiological reactions.

    Conclusions:

    • GBCA administration is not associated with increased AKI rates, irrespective of baseline renal function.
    • GBCA use did not elevate the risk of acute ADRs in patients with impaired renal function.
    • GBCA administration appears safe and well-tolerated across a broad range of renal function levels.