The Chiba needle is one of the most commonly used biopsy/percutaneous access needles. It is a two-part hollow needle with a beveled tip angled at 30 degrees. The inner stylet (which is also beveled) is removable. The beveling of the Chiba needle results in superior steering compared to conventional trocar needles. It is typically between 18-22G and is primarily used for aspiration tissue biopsy, to aspirate fluid, and to gain percutaneous access to the biliary tree (e.g. PTC) and pelvicalyceal system of the kidney. It can also be used to puncture and thereby deflate an intravascular balloon if it fails to deflate through its own valve 1,2.
- 1. David Kessel, Iain Robertson. Interventional Radiology: A Survival Guide E-Book. (2016) ISBN: 9780702068881
- 2. Taslakian, Bedros, Ingber, Ross, Aaltonen, Eric, Horn, Jeremy, Hickey, Ryan. Interventional Radiology Suite: A Primer for Trainees. (2019) Journal of Clinical Medicine. 8 (9): 1347. doi:10.3390/jcm8091347 - Pubmed