Persistence of Open Stone Surgery in the United States in the 21st Century.

INTRODUCTION: In the era of minimally invasive surgery, endoscopic and percutaneous interventions for urinary tract stones have become a mainstay, and the need for open stone surgery (OSS) has decreased. We sought to determine the contemporary incidence of OSS among urologists in the United States.

METHODS: Case logs submitted for certification to the American Board of Urology from 2005 to 2015 were queried for Current Procedural Terminology codes relevant to OSS. Cases were analyzed for the associated practice type, practice area population, geographic region, provider subspecialty, and certifying status of the reporting urologist.

RESULTS: A total of 334 cases of OSS were identified, with 73.4% performed by urologists self-identified as generalists. The most common subspecialists performing OSS were endourologists (12.3%). Most cases were done in the private practice setting (80.4%), and in practice areas with populations exceeding 1,000,000 (43.2%). OSS was more commonly reported by urologists applying for recertification than initial certification. Thirty open stone cases were reported each year on average, and there was no decrease in stone cases over time based on linear regression analysis (R2  = 0.06). OSS was most commonly performed in the Western Section of the American Urological Association (AUA) (25.1%) and least commonly performed in the Northeastern Section (1.5%). A chi-square analysis was performed, and the Western Section had a significantly higher number of OSSs than expected as its urologists represent only 17% of the total AUA membership (p < 0.01). The Northeastern Section comprises 7% of the AUA membership but only performed 1.5% of OSSs that were significantly lower than expected (p < 0.001).

CONCLUSIONS: Domestic performance of OSS remains stable. It is unclear as to whether the majority of these cases could be served by less-invasive technologies or whether the volume represents a true nadir. Future work may be warranted to assess attitudes, training, and feasibility of minimally invasive stone management in areas where OSS is most common.