Franklin-Silverman Modified Fuchs Biopsy Needle 105mm

Franklin-Silverman Modified Fuchs — 105mm Biopsy Needle

The Vim-Silverman cutting biopsy needle was described by Vim and Silverman in 1938 as the first effective percutaneous tissue-core biopsy device — predating Menghini’s 1957 aspiration-suction approach by nearly two decades. Franklin’s modification (with Fuchs’s refinement) improved the cutting-mechanism reliability and remains in use as a cutting-biopsy alternative to the suction-based Menghini technique for situations where intact tissue architecture is critical.

The cutting-vs-suction biopsy choice

Menghini-technique aspiration biopsy produces fragmented tissue cores suited to most histopathological analysis; Franklin-Silverman cutting biopsy produces intact tissue cylinders that preserve architectural information (lobular structure, fibrosis architecture, vessel relationships). For specific indications — autoimmune-hepatitis assessment requiring architectural lobular review, suspected lymphoma requiring intact node architecture — the Franklin-Silverman cutting biopsy remains preferred over Menghini-technique aspiration.

The 105mm length variant

The 105mm shaft length is the standard adult biopsy-needle length for percutaneous liver biopsy through the right-flank approach. The Franklin-Silverman uses a coaxial inner-cutter-and-outer-trocar design — the trocar advances into the tissue, the cutter slides over it to slice and retain the core, and the assembly withdraws with the intact specimen.