Describing the learning curve for bulbar urethroplasty

Area of Science:

• Urology
• Surgical Education
• Reconstructive Surgery

Background:

• Learning curves are established for many urological procedures, but less so for urethroplasty.
• This study focuses on the learning curve associated with bulbar urethroplasty performed by a single surgeon.

Purpose of the Study:

• To evaluate the learning curve for bulbar urethroplasty.
• To assess the impact of surgeon experience on restricture rates in bulbar urethroplasty.

Main Methods:

• Retrospective review of 91 consecutive bulbar urethroplasty cases performed by a single surgeon.
• Data collected included urethroplasty type, restricture rates (defined by urethrogram/flow rate), and follow-up duration.
• Restricture rates were analyzed by quartiles of surgical experience, with statistical comparison between the first and fourth quartiles using chi-squared test.

Main Results:

• A total of 91 urethroplasties were performed: 42 Dorsal BMG, 20 Augmented Rooftop, and 29 BBA.
• Median follow-up ranged from 35 to 42 months across quartiles.
• Restricture rates decreased progressively with experience: 17% (Q1), 8.7% (Q2 & Q3), and 4.5% (Q4).
• A statistically significant reduction in restricture rates was observed between the first and fourth quartiles (χ² P<0.01). No restrictures occurred after 24 months.

Conclusions:

• A significant learning curve exists for bulbar urethroplasty, with restricture rates improving substantially with surgeon experience.
• The restricture rate dropped from 17% in the initial cases to 4.5% in the most experienced quartile.
• Optimal restricture rates may necessitate approximately 90 cases to achieve, highlighting the importance of experience in this procedure.