Assessment of Fluoroscopy Times With Surgeon Versus Technologist Control


This is a prospective randomized trial to study the effect of assigning the control of the fluoroscopic x-ray activation to the surgeon as compared to the radiation technologist. Radiation exposure will be assessed from the collected data, fluoroscopy time, and dose parameters (cumulative absorbed dose and dose area product). From exposure data, entrance skin dose (ESD) and midline absorbed dose (MLD) will be calculated. The primary outcome in this study will be total fluoroscopy time for the procedure. A secondary outcome will be the ESD. The investigators will further analyze the contribution of clinical predictors (e.g. stone size/location) and procedural predictors on fluoroscopy times and ESD. It is hypothesized that a 30% reduction in fluoroscopy time will occur when the operating surgeon is controlling the activation of the x-ray beam.

Study Start Date

January 2013

Estimated Completion Date

January 2017


  • Procedure: Technologist control of fluoroscopy
  • Procedure: Surgeon control of fluoroscopy


  • Urology: Stone Disease
  • Nephrology: Stone Disease

MeSH Terms

  • Kidney Calculi
  • Nephrolithiasis

Study ID

Children's Hospital Boston -- P00003145



Trial ID


Study Type


Trial Phase


Enrollment Quota



Children's Hospital Boston

Inclusion Criteria

  • Patients undergoing ureteroscopy for urolithiasis
  • 5 years to 25 years old

Exclusion Criteria

  • Pregnant
  • Less than 5 years old or older than 25 years old




5 Years to 25 Years

Accepts Healthy Volunteers


Study Locations and Contact Information (1)

Study Location Distance Name Phone Email
Boston Childrens Hospital - Boston, Massachusetts 2.6 miles Matthew Migliozzi MA 617-355-3559 provides clinical trial listings in an easy to view format. All clinical trial information is pulled directly from This website does not guarantee acceptance into any clinical trial, and is not responsible for adverse events that may be incurred from a clinical trial.