Ultrasonographic stabilization, key parameter for determining follow-up length after unilateral pyeloplasty

Miami, FL: A recent study published in the Journal of Pediatric Urology has found ultrasonographic stabilization to be an appropriate and non-invasive parameter for determining the follow-up length after unilateral pyeloplasty. The study further states that it is an adequate timeframe for observing improvement or stabilization of hydronephrosis, identification of failed pyeloplasties, and performing any additional procedure required after the primary repair. 

More than 1,500 pediatric pyeloplasties are being performed in the US per year but there is a lack of consensus on the adequate imaging modality and follow-up timing after surgery. To fill this knowledge gap, María Camila Suárez Arbeláez, Department of Urology, Nicklaus Children's Hospital, Miami, FL, and colleagues aimed to investigate if ultrasonographic stabilization in the grade of hydronephrosis after pyeloplasty is an adequate parameter for defining the optimal follow-up length after surgery and to detect failed procedures. They also analyzed clinical variables that could impact ultrasonographic stabilization. 

For this purpose, the researchers conducted a retrospective chart review of patients who underwent pyeloplasty between 2012-2020. The patients who were aged ≤21 years old at the time of surgery, had ≥3 months of postoperative follow-up, had pre and postoperative renal ultrasounds, and had met the criteria for ultrasonographic stabilization after surgery were included. 

Ultrasonographic stabilization was defined as 2 consecutive ultrasounds following pyeloplasty, a minimum of 1-month apart, with the same degree of hydronephrosis in accordance with the Society for Fetal Urology (SFU) grading system. Collection of data concerning clinical, surgical, and postoperative variables was done.