Resistive Index (RI) in Febrile Urinary Tract Infection: New Predictive Value
Abstract
Background and Objective: Urinary tract infection is the most common bacterial infection in the pediatric population.The upper urinary tract infection involves the kidney parenchyma and may cause scarring and permanent damage that will proceed to cause hypertension and decreased kidney function. Almost third of cases will relapse following the first infection in one year. There are different imaging techniques that can help to detect children at risk for future infections, kidney scarring or other systemic complications. The Ultrasonography of bladder and kidneys: is a relatively cheap, non-invasive and fast test that enables to find children with anatomical anomalies that can be corrected to avoid future infections or complications. Also, this test does not pose the risk of radiation exposure. Voiding cystourethrogram: is the test of choice to establish the presence of vesicoureteral reflux that is a major risk factor for future infections and scaring. This test has a radiation exposure risk, it is invasive and relatively complex to perform. DMSA scintigraphy test: may be performed to determine acute pyelonephritis or to investigate kidney scarring. This test has a greater radiation exposure risk. But it cannot distinguish between dysplasia of a kidney or scarring. With the development and improvement of the imaging capabilities of Doppler ultrasonography, we can measure the Resistive Index, which is a sonographic value to assess the kidney function. The normal value of the…
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