What am I looking at?
Visual recognition
Bristled brush tip that extends from a protective sheath once positioned across the stricture.
13-03
Biliary cytology brush
Cytology brush
Three-panel learning framework
Recognition, context, and distinction
What does it do, and where will I see it?
Use & procedural context
Sheathed cytology brush advanced over a wire and scrubbed across a biliary stricture to abrade cells for cytologic diagnosis of malignancy. Typical procedural contexts include indeterminate or suspected malignant biliary strictures during drainage or cholangiography.
What most clearly distinguishes it from similar devices?
Key distinctions
The protective sheath contains the brush during navigation and exposes the bristles only across the target stricture, distinguishing the sampling device from a balloon or drainage catheter.