Coagulum pyelolithotomy.

The interest shown in a coagulum pyelolithotomy technique reported at a recent urologic meeting has prompted this preliminary communication. It was not possible to follow the methodology recently reported using the fibrinogen preparation available in Canada. This led to the development of the simpler technique described in this report which has been used in 3 cases to date. In all cases all calculi were easily extracted. Using the coagulum, considerable operating room time was saved and renal instrumentation was minimized.