The 'learning curve' in hypospadias surgery

Abstract

Objective: To provide an insight into the 'learning curve' of fellowship-trained paediatric urologists associated with hypospadias repair, as hypospadias surgery is one of the most common yet difficult procedures used by the paediatric urologist.

Patients and methods: Prospective data were collected on 231 consecutive hypospadias operations performed by one paediatric urologist (M.H.) over a 5-year period, beginning with his first year after completing his fellowship. All patients were having their first surgery and none had a staged repair. Fistula formation was used as a surrogate for the complication rate, as it is an objective measurable outcome that is easily identified with little interobserver or parental/physician variability. The follow-up included several visits in the 15 months after repair, during which virtually all complications could be identified and addressed.

Results: The operative results improved throughout the 5 years of observation; there was a statistically significant decline in the fistula rate in each year of observation (P < 0.001; Kruskal-Wallis exact test for ranked groups). The absolute reduction in fistula rates between the first 2 and the last 2 years was 12.7% (P < 0.02; chi squared).

Conclusions: The science and surgery of hypospadiology is mostly and correctly delegated to the paediatric urologist. Even in the hands of a fellowship-trained paediatric urologist, a successful repair, as measured by complication rate, statistically improves with time and experience.