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Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
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Compatibility of endoclips in the gastrointestinal tract with magnetic resonance imaging

Dong Yeol Shin1, Sumi Park2, Ain Kim3

  • 1Division of Gastroenterology, Department of Internal Medicine, National Health Insurance Service Ilsan Hospital, 100 Ilsan-ro Ilsan-donggu, Goyang-si, Goyang, 10444, Korea.

Scientific Reports
|October 7, 2020
PubMed

Insights

This study found that Olympus EZ and QuickClip Pro endoclips are safe for use in the gastrointestinal tract during 3 Tesla Magnetic Resonance Imaging (MRI). No tissue damage or clip detachment occurred in ex vivo tests.

Area of Science:

  • Medical Devices
  • Gastroenterology
  • Radiology

Background:

  • Endoclips are used for gastrointestinal procedures.
  • Compatibility of retained endoclips with Magnetic Resonance Imaging (MRI) is not well-defined.
  • Patient safety during MRI is paramount.

Purpose of the Study:

  • To evaluate the safety of commonly used endoclips during 3 Tesla (T) MRI.
  • To assess potential tissue damage, perforation, or endoclip detachment.
  • To determine the magnetic forces acting on endoclips in porcine tissue.

Main Methods:

  • Ex vivo testing of Olympus EZ and QuickClip Pro endoclips in excised porcine tissue.
  • Exposure to a 3T MRI magnetic field.
  • Assessment of tissue integrity and endoclip stability.
  • Measurement of detachment forces and magnetic forces.

Main Results:

  • No instances of tissue damage or perforation were observed.
  • Neither Olympus EZ nor QuickClip Pro endoclips detached during 3T MRI.
  • Detachment forces for Olympus EZ clips ranged from 0.9 to 3.0 N.
  • The translational magnetic force on endoclips was minimal (3.18 × 10⁻³ N).

Conclusions:

  • 3T MRI is safe for patients with retained Olympus EZ and QuickClip Pro endoclips in the gastrointestinal tract.
  • These endoclips demonstrate no adverse effects under 3T MRI conditions.
  • Clinical guidelines can be informed by these ex vivo safety findings.

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