Chiba Needle Vs. Other Biopsy Needles

Clinical Selection and Manufacturing Differences Between Chiba, Tru-Cut, Franseen, and Menghini Needles

https://radiopaedia.org/articles/chiba-needle

Within the clinical biopsy needle family, the Chiba needle, cutting needles (Tru-Cut / Semi-Automatic Biopsy Needle), Franseen needle (tri-facet cutting needle), and Menghini hepatic puncture needle are the most common types. As a Chiba needle manufacturer, understanding the differences among them not only guides product positioning but also better serves OEM/ODM customers' diversified needs.

The Chiba Needle​ is an FNA-type (Fine Needle Aspiration) needle, typically ≥20G (most often 20G–23G), thin-walled, hollow, and equipped with a stylet. The operator applies negative pressure to aspirate cell clusters or small tissue fragments for cytological diagnosis. Advantages include minimal trauma, little bleeding, and the ability to adjust direction multiple times in superficial and deep organs (the needle body has a degree of flexibility), making it suitable for cautious sampling from dangerous locations (e.g., adjacent to large vessels, gallbladder, pancreatic uncinate process). Its limitation is the inability to obtain intact architectural tissue, thus it is unsuitable for cases requiring definitive histological classification (such as lymphoma subtyping or sarcoma subtyping).

Tru-Cut-type semi-automatic/fully automatic cutting biopsy needles​ are typically 14G–18G core needles with an inner notched stylet and an outer cutting cannula. Upon triggering, a core of tissue is harvested (Core Biopsy), suitable for breast, kidney, liver, and prostate cases requiring histological confirmation. Manufacturing difficulties lie in the spring-fired mechanism, notch sharpness, and coaxial outer sheath fit tolerance - entirely different from the purely tubular structure of the Chiba needle.

The Franseen Needle​ (tri-wing or tri-faceted tip cutting needle) is a modified cutting-aspiration needle based on the Chiba needle. The tip is tri-rhomboidal; rotating insertion can cut small strips of tissue, bridging cytological and mini-histological specimen acquisition. It is often used for lung, kidney, and fibrotic lesions that are difficult to sample. Manufacturers wishing to expand their product line can develop a Franseen-tip Chiba needle (Chiba-style with Franseen tip) based on the existing Chiba line, adding only a multi-axis CNC grinding station for the triple-bevel tip.

The Menghini Needle, mostly used for percutaneous liver biopsy (e.g., hepatic fibrosis staging), is similar to the Chiba but with a larger outer diameter (commonly 16G–18G), often featuring side holes or a different bevel design, emphasizing a rapid "one-second puncture" to reduce tissue fragmentation.

From a manufacturing standpoint, the Chiba needle places extreme demands on tubing quality and tip grinding - because the wall is thin (thin-walled tube thickness is only about 0.1 mm), grinding can easily cause burrs, rolled edges, or orifice deformation; whereas Tru-Cut needles test the injection molding and assembly precision of the firing mechanism. Chiba needle manufacturers seeking horizontal expansion may start with the Franseen-tip Chiba needle, reusing existing tube drawing and polishing lines while adding multi-angle CNC grinding.

A common question from procurers (distributors/hospitals) is: "When do we use a Chiba needle instead of a cutting needle?" Sales materials should clearly state: Chiba needles are首选 for - thyroid/parathyroid nodule FNA, initial screening of small liver/CT-guided lesions, pancreatic cystic/solid masses, lymph node FNA, cyst/abscess aspiration, and initial puncture for PTC/PTCD channel establishment. When histological subtyping is required or repeated FNA yields insufficient material, upgrade to a core cutting biopsy needle. This clear boundary of indication is also the core selling point distinguishing Chiba needles from competing products.