A child has fever, chills, back pain, elevated WBC and ESR, and abnormal urinalysis.

These findings are consistent withpyelonephritisor another upper urinary tract infection. Arenal ultrasoundis a non-invasive test used to evaluate forstructural abnormalities, abscess, or obstruction, especially in a febrile child with a urinary tract infection.

“Renal ultrasound is indicated after diagnosis of febrile UTI to evaluate renal anatomy and rule out complications like abscess.”

(Referenced from CCRN Pediatric – Direct Care: Renal, Urinary Tract Infections and Imaging)