What am I looking at?
Visual recognition
Outer cannula left indwelling while the core or FNA needle passes coaxially through its lumen.
15-03
Coaxial biopsy introducer needle
Coaxial introducer needle
Three-panel learning framework
Recognition, context, and distinction
What does it do, and where will I see it?
Use & procedural context
Outer guiding cannula placed once to the lesion edge, through which multiple passes are taken from a single skin puncture, improving safety and yield. Typical procedural contexts include lung, liver, kidney, lymph node, adrenal, and soft-tissue biopsy.
What most clearly distinguishes it from similar devices?
Key distinctions
The outer coaxial introducer remains at the lesion margin while multiple sampling passes are performed through it, preserving a single access tract rather than repeatedly repuncturing the skin and target path.