Related Experiment Video
Updated: Sep 5, 2025
Magnetically-Assisted Remote Controlled Microcatheter Tip Deflection under Magnetic Resonance Imaging
Published on: April 4, 2013
The efficient of application of a fine magnetic traction system simplifies colorectal endoscopic submucosal
Xinyue Wan1, Qianshan Ding2, Lei Shen1
1Department of Gastroenterology, Renmin Hospital of Wuhan University, Wuhan, China.
Background:
Sometimes it is difficult to maintain good visualization of the submucosal layer during colorectal endoscopic submucosal dissection (ESD). This study aimed to evaluate the feasibility and efficacy of a novel traction method, the fine magnetic traction system (FMTS), in colorectal ESD.
Methods:
ESD was performed 10, 15, or 30 cm from the anus in the colorectums of 10 Bama miniature pigs with or without FMTS. The circumcision and dissection per unit time (cm2/min), en bloc resection, perforation and bleeding rates, size and integrity of the specimen and submucosal injection times were analysed.
Results:
A total of 60 ESD procedures were performed with or without FMTS assistance. The en bloc resection rates were 100% at 10 and 15 cm from the anus in both the control group (conventional ESD) and the FMTS group. However, at 30 cm from the anus, these rates were only 10% and 70% (p = 0.006). The resection speeds (control vs. FMTS) at the 10, 15, and 30 cm points were 0.35 ± 0.07 cm2/min vs. 0.39 ± 0.19 cm2/min (p = 0.56), 0.30 ± 0.09 cm2/min vs. 0.38 ± 0.02 cm2/min (p = 0.04), and 0.11 cm2/min vs. 0.26 ± 0.10 cm2/min, respectively.
Conclusions:
The FMTS provides effective counter-traction and efficiently reduces the risks and difficulties of difficult colonic ESD in the porcine model.
