AI Article Synopsis
- Endoscopic clipping devices used for GI treatments are generally labeled as MRI incompatible, but this study aims to evaluate their actual performance in an MRI environment.
- Using excised pig tissue, the research tested various endoclips (Resolution Clip, TriClip, QuickClip, and Ethicon Endo-surgery Clip) in a 1.5-Tesla MRI scanner, focusing on their physical deflection and detachment.
- Results indicated that only the Ethicon Endo-surgery clip showed compatibility with MRI, while the TriClip was the only one to detach from the tissue, suggesting it is incompatible with MRI.
Article 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.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.gie.2009.01.024 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Atomic Force Microscopy of Viruses.
Subcell Biochem
December 2024
Department of Physics of the Condensed Matter, C03 and IFIMAC (Instituto de Física de la Materia Condensada). Universidad Autónoma de Madrid, Madrid, Spain.
Atomic force microscopy (AFM) makes it possible to obtain images at nanometric resolution, and to accomplish the manipulation and physical characterization of specimens, including the determination of their mechanical and electrostatic properties. AFM has an ample range of applications, from materials science to biology. The specimen, supported on a solid surface, can be imaged and manipulated while working in air, ultra-high vacuum or, most importantly for virus studies, in liquid.
View Article and Find Full Text PDFCompensating elastic faults in a torque-assisted knee exoskeleton: functional evaluation and user perception study.
J Neuroeng Rehabil
December 2024
Chair of Autonomous Systems and Mechatronics, Friedrich-Alexander University Erlangen-Nürnberg, Erlangen, Germany.
Wearable robots are often powered by elastic actuators, which can mimic the intrinsic compliance observed in human joints, contributing to safe and seamless interaction. However, due to their increased complexity, when compared to direct drives, elastic actuators are susceptible to faults, which pose significant challenges, potentially compromising user experience and safety during interaction. In this article, we developed a fault-tolerant control strategy for torque assistance in a knee exoskeleton and investigated user experience during a walking task while emulating faults.
View Article and Find Full Text PDFTemporal response patterns of Layer 4 rat barrel cortex neurons across various naturalistic whisker motions.
PLoS One
December 2024
School of Biomedical Sciences, Monash University, Melbourne, Victoria, Australia.
A central topic in neuroscience is the neural coding problem which aims to decipher how the brain signals sensory information through neural activity. Despite significant advancements in this area, the characterisation of information encoding through the precise timing of spikes in the somatosensory cortex is limited. Here, we utilised a comprehensive dataset from previous studies to identify and characterise temporal response patterns of Layer 4 neurons of the rat barrel cortex to five distinct stimuli with varying complexities: Basic, Contact, Whisking, Rough, and Smooth.
View Article and Find Full Text PDFSimulation of the charged particle deflection from the sweeping magnet array in the Lunar Environment heliospheric X-ray imager.
Rev Sci Instrum
December 2024
662, NASA Goddard Space Flight Center, Greenbelt, Maryland 20771, USA.
Article Synopsis
- The Lunar Environment heliospheric X-ray Imager (LEXI) is designed to capture x-ray images from solar wind interactions in Earth's magnetosheath, helping researchers understand energy transfer into Earth's magnetosphere.
- As part of a lunar lander mission landing in Mare Crisium, LEXI features a unique array of 48 neodymium magnets to protect against interference from charged particles while minimizing stray magnetic fields.
- A Runge-Kutta-based simulation model shows that LEXI's deflector array and other particle suppression methods effectively limit proton and electron contamination, ensuring the success of its imaging capabilities and offering insights for similar instruments.
Bioinspired design and validation of a soft robotic end-effector with integrated shape memory alloy-driven suction capabilities.
Bioinspir Biomim
December 2024
Institute of Intelligent Machines, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People's Republic of China.
The exploration of adaptive robotic systems capable of performing complex tasks in unstructured environments, such as underwater salvage operations, presents a significant challenge. Traditional rigid grippers often struggle with adaptability, whereas bioinspired soft grippers offer enhanced flexibility and adaptability to varied object shapes. In this study, we present a novel bioinspired soft robotic gripper integrated with a shape memory alloy (SMA) actuated suction cup, inspired by the versatile grasping strategies of octopus arms and suckers.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!