Magnamosis III: delivery of a magnetic compression anastomosis device using minimally invasive endoscopic techniques.


Conference Paper

PURPOSE: Magnamosis creates a secure sutureless anastomosis through magnetic compression. In this study, we further develop and test delivery devices capable of creating a secure duodeno-colonic anastomosis using available minimally invasive endoscopic techniques. METHODS: Eight pigs underwent general anesthesia. Colonoscopy was used to deliver 1 magnetic ring to the hepatic flexure. Simultaneously, upper endoscopy delivered the other magnetic ring into the duodenum using a variety of techniques. The 2 magnetic rings were brought into magnetic proximity under laparoscopic guidance. The pigs were recovered and examined daily followed by sacrificing at 1, 2, 4, and 6 weeks. RESULTS: The device designed to deliver and release each magnetic ring evolved from using a guide wire and balloon devices to redesigning the magnetic ring casing with a groove to accommodate an endoscopic snare. Laparoscopic visualization assured safe magnet mating of intestinal segments. The duodeno-colonic anastomoses created with the snare yielded widely patent anastomoses. In vitro testing revealed excellent burst pressure. Histology revealed complete healing as early as 1 week. CONCLUSION: We redesigned the magnamosis device to facilitate delivery by endoscopic techniques. The snare technique allows endoscopic positioning and controlled release of the magnetic rings for a secure side-to-side duodeno-colonic anastomosis.

Full Text

Cited Authors

  • Gonzales, KD; Douglas, G; Pichakron, KO; Kwiat, DA; Gallardo, SG; Encinas, JL; Hirose, S; Harrison, MR

Published Date

  • June 2012

Published In

Volume / Issue

  • 47 / 6

Start / End Page

  • 1291 - 1295

PubMed ID

  • 22703808

Pubmed Central ID

  • 22703808

Electronic International Standard Serial Number (EISSN)

  • 1531-5037

International Standard Serial Number (ISSN)

  • 0022-3468

Digital Object Identifier (DOI)

  • 10.1016/j.jpedsurg.2012.03.042