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Magnetic resonance imaging compatibility of endoclips.

Abstract：

BACKGROUND:Endoscopic clipping devices are now available for treatment of GI hemorrhage and microperforations. All commercially available endoclips are labeled as magnetic resonance imaging (MRI) incompatible. No data are available about the actual magnetic field strength at which endoclips are first deflected nor the clinical relevance of the magnetic fields on endoclips used in GI endoscopy. OBJECTIVE:To determine the compatibility of different endoclips with MRI. DESIGN:Prospective observational study. SETTING:Experiment on excised pig tissue in an MRI scanner. INTERVENTIONS:The physical deflection and strength of attraction of endoclips: Resolution Clip, TriClip, QuickClip, and Ethicon Endo-surgery Clip were measured in different positions by using an MRI scanner at a field strength of 1.5 Tesla. Endoclips that demonstrated deflection were attached to a pig stomach and tested for detachment at a 1.5-Tesla MRI field strength. MAIN OUTCOME MEASUREMENTS:Physical deflection and detachment from pig stomach mucosa in an MRI scanner. RESULTS:All endoclips except the one made by Ethicon Endo-surgery demonstrated physical deflection under the tested conditions. The magnetic attraction was strongest for the Resolution Clip (0.7 gauss) compared with the TriClip (1.2 gauss) and the QuickClip (26.8 gauss). Only the Triclip demonstrated detachment from the pig gastric tissue under testing conditions. LIMITATIONS:A pig model and a small number of clips. CONCLUSIONS:The Ethicon Endo-surgery clip is compatible with MRI. All other clips showed deflection in a magnetic field, but only the TriClip demonstrated detachment from gastric tissue, and hence should be considered MRI incompatible.

journal_name

Gastrointest Endosc

journal_title

Gastrointestinal endoscopy

authors

Gill KR,Pooley RA,Wallace MB

doi

10.1016/j.gie.2009.01.024

subject

Has Abstract

pub_date

2009-09-01 00:00:00

pages

532-6

issue

3

eissn

0016-5107

issn

1097-6779

pii

S0016-5107(09)00104-7

journal_volume

70

pub_type

杂志文章

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