Gouley's catheter

[gōōlēz]
n.
  1. A solid, curved steel instrument grooved on its inferior surface so that it can be passed over a guide inserted through a urethral stricture.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.