Related Experiment Videos
Outcome analysis of pediatric pyeloplasty as a function of patient age, presentation and differential renal function
Y H Salem1, M Majd, H G Rushton
1Department of Pediatric Urology, Children's National Medical Center, George Washington University Medical Center, Washington, D.C., USA.
Insights
Pyeloplasty surgery in children is safe and effective. Most kidneys with impaired function showed improvement after the procedure, with preoperative function being the key predictor of success.
Area of Science:
- Pediatric Urology
- Surgical Outcomes
- Renal Function Assessment
Background:
- Ureteropelvic junction obstruction is a common cause of congenital hydronephrosis in children.
- Pyeloplasty is the gold standard surgical treatment for this condition.
- Assessing postoperative renal function is crucial for evaluating surgical success.
Purpose of the Study:
- To evaluate the change in renal function after pyeloplasty in pediatric patients.
- To identify predictors of functional improvement post-surgery.
Main Methods:
- Retrospective review of 100 pyeloplasties in 98 children (5 days to 16 years old).
- Preoperative and postoperative isotope renal scans (99mtechnetium diethylenetriaminepentaacetic acid or mercaptoacetyltriglycine renography) were used to assess individual renal function.
- Data analyzed based on patient age and presenting symptoms.
Main Results:
- 98% of patients experienced improved drainage; only 1 required reoperation.
- Approximately one-third of patients showed a >5% improvement in renal function.
- 77% of kidneys with improved function were initially impaired (≤40% contribution).
- Preoperative differential renal function was the sole significant predictor of postoperative improvement.
Conclusions:
- Pyeloplasty is a safe procedure in children, with expected functional improvement in most kidneys with preoperative impairment.
- Early pyeloplasty in infants does not appear to offer superior functional outcomes compared to older children.
- Preoperative renal function is the most critical factor in predicting post-pyeloplasty functional recovery.
Purpose:
We retrospectively reviewed a consecutive series of patients who underwent pyeloplasty. In all cases preoperative and postoperative isotope renal scans were performed to assess the surgical outcome with particular emphasis on the change in renal function postoperatively.
Materials And Methods:
The clinical records of 108 consecutive children with ureteropelvic junction obstruction were reviewed. Individual renal function was evaluated and obstruction was confirmed by diuretic assisted 99mtechnetium diethylenetriaminepentaacetic acid or mercaptoacetyltriglycine renography. A total of 100 pyeloplasties in 98 children between 5 days and 16 years old was included. Results were analyzed by groups according to patient age and symptoms at presentation.
Results:
Drainage half-times improved in 98% of patients and only 1 required reoperation. Improved renal function greater than 5% was noted in about a third of each age group. Function remained stable in 68% of the kidneys and decreased in only 1. Of the improved kidneys 77% had impaired function preoperatively (40% or less of the total contribution). Those presenting with a renal mass had the greatest improvement in function. There was no statistically significant difference in improvement in renal function by age group or patient presentation. Regression analysis revealed that preoperative differential renal function was the only statistically significant predictor of improvement in renal function after pyeloplasty.
Conclusions:
Pyeloplasty in children is safe and renal functional improvement can be expected in the majority of kidneys with impaired function at presentation. However, there was no indication that early pyeloplasty in infants is more likely to result in improved function than in older children.