Branches / Gastroenterology / EUS Needles & Systems / SonoTip TopGain Flex EUS FNB Needle System (Nitinol)
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SonoTip TopGain® Flex EUS FNB Needle System (Nitinol)

A nitinol EUS-FNB needle (nitinol EUS-guided fine needle biopsy needle) is a core biopsy needle on a 100% nitinol shaft that takes tissue for histology under endoscopic ultrasound (EUS) guidance, including at difficult access angles. SonoTip TopGain Flex is a single-use 22G EUS core biopsy needle with the crown cut tip on a 100% nitinol shaft.

Manufacturer: Medi-Globe / Endo-Flex

This page is intended for healthcare professionals.

SonoTip TopGain Flex EUS FNB Needle System (Nitinol)

Measurements at a glance

Sheath outer diameter
1.8 mm
Needle length adjustment
0 to 8.5 cm
EUS / EBUS needle / EUS / EBUS iğnesi A B C
A
Needle length adjustment 0 to 8.5 cm
B
Needle 22G / 0.7 mm, 100% Nitinol
C
Sheath outer diameter 1.8 mm

Schematic, not to scale

Needle
22G / 0.7 mm, 100% Nitinol

A 100% Nitinol fine needle biopsy system that carries the TopGain three-point crown cut on a nitinol shaft, for work at difficult access angles.

In which cases?

  • Pancreatic head and uncinate lesions reached with the scope in a tight angle.
  • Hard or fibrotic lesions where the needle has to hold its line through the wall.
  • Sessions with repeated passes, where the needle has to return to its form each time.

What makes it different?

  • 100% nitinol shaft with a shape memory effect; the manufacturer states the needle returns to its form after the first puncture and goes to the target on repeated passes.
  • The same three-point crown cut as the steel TopGain.
  • 22G, 0.7 mm, needle length adjustment 0 to 8.5 cm, sheath 1.8 mm and 2.7 mm.
  • Tip stabilizer version for 3.2 to 3.8 mm working channels.

Frequently asked questions

What is a nitinol EUS-FNB needle?

A nitinol EUS-FNB needle takes a tissue core under endoscopic ultrasound (EUS) guidance, like any EUS-FNB needle, but its shaft is nitinol instead of stainless steel. SonoTip TopGain Flex is 22G, 0.7 mm, with a 100% nitinol shaft and the same three-point crown cut tip as the steel TopGain.

Why is nitinol used in an EUS needle?

Nitinol has a shape memory effect. The manufacturer states that the needle returns to its form after the first puncture and goes to the target on repeated passes.

What is the difference between TopGain and TopGain Flex?

The tip is the same, a three-point crown cut. The shaft differs: stainless steel on TopGain, 100% nitinol on TopGain Flex. TopGain comes in 19G, 22G and 25G; TopGain Flex is 22G (0.7 mm), with a 1.8 mm sheath and a 2.7 mm sheath version with a tip stabiliser for 3.2 to 3.8 mm working channels.

Which EUS FNB needle is used for tight scope angles, such as pancreatic head and uncinate lesions?

The uses listed on this page are pancreatic head and uncinate lesions reached with the scope in a tight angle, hard or fibrotic lesions where the needle has to hold its line through the wall, and sessions with repeated passes. The choice of needle is the physician's decision.

Can it be ordered in Türkiye?

Not yet. TopGain Flex is listed as coming soon and has no catalogue number yet. We can share the product documentation; write to us for information.

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Technical data

Manufacturer
Medi-Globe / Endo-Flex

Updated: 09.11.2026

This product is not yet available for order in Türkiye. We can share the product documentation and the published studies.
Write to us for information