Imaging
- Renal ultrasonography
- Generally not indicated in children with prerenal failure from dehydration who respond promptly to fluid resuscitation
- Provides important information regarding
- Kidney size and echogenicity
- Renal blood flow
- Collecting system
- Urinary bladder
- Children with intrinsic causes
- Echogenic and slightly enlarged kidneys
- Bilateral hydronephrosis or hydroureteronephrosis and bladder wall thickening indicate obstruction of bladder outlet causing postrenal oliguria/anuria.
- Ultrasonography can detect congenital disorders, such as polycystic kidney disease and multicystic dysplastic kidney.
- Doppler examination of renal blood flow is helpful in diagnosing renal vascular thrombosis.
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