Utility of Post-Urinary Tract Infection Imaging in Patients With Normal Prenatal Renal Ultrasound

作者：Sasaki Jun^*; Parajuli Nirmala; Sharma Preeti; Nanda Maya; Shah Rina; Gershel Jeffrey; Rauch Daniel A

来源：Clinical Pediatrics, 2012, 51(3): 244-246.

DOI：10.1177/0009922811420712

• urinary tract infection
• renal ultrasound
• voiding cystourethrography
• prenatal ultrasound

The American Academy of Pediatrics recommends renal ultrasound (RUS) and voiding cystourethrography (VCUG) for all infants after a first urinary tract infection (UTI). However, many congenital renal anomalies are identified by a prenatal US. At the present time, there are no data regarding the yield of post-UTI imaging among infants who have a documented normal prenatal US. We retrospectively reviewed the charts of all patients < 1 year of age with a first UTI who had normal kidneys noted on prenatal US to determine the frequency of abnormal findings. Abnormal RUS and VCUG results were noted in 5.1% (24 of 471) and 20.4% (75 of 368) of infants, respectively. While the abnormal US rate is significantly less than what has been previously reported, the frequency of abnormal VCUGs is similar. These results suggest that a post-UTI RUS may not be needed if the prenatal US was normal. However, a VCUG continues to be indicated.