Design and pre-clinical evaluation of a folding magnetic anastomosis device for minimally invasive surgery. Issue 7 (3rd October 2022)

• Record Type: Journal Article
• Authors: Fass, T. H.; Cahill, Ronan; Khan, Mohd; Hao, Guangbo; Cantillon-Murphy, Pádraig
• Is Part Of: Minimally invasive therapy & allied technologies. Volume 31:Issue 7(2022)
• Page Start: 1050
• Page End: 1057
• Publication Date: 2022-10-03
• Subjects: Magnetic -- origami-robot -- minimally invasive surgery -- medical device design; Endoscopy -- Periodicals; Interventional radiology -- Periodicals; Endoscopic surgery -- Periodicals; 617.05
• DOI: 10.1080/13645706.2022.2119417
• Languages: English
• ISSNs: 1364-5706

Abstract

Abstract: Objective: This work presents the results of Benchtop tests and pre-clinical study of a novel design for a foldable magnetic anastomosis device. The device can be deployed through an endoscope device channel and fold into a ring larger than the deployment port. This new design enables the target application in JJ-anastomosis creation. Material and methods: The folding anastomosis device is constructed from a chain of permanent magnets suspended in a suture weaving inspired by the contact-aided compliant mechanisms. The device was deployed through an endoscope in Benchtop experiments and its expected coupling force was measured in a pull test. A set of experiments was executed during the pre-clinical study, where the device was deployed in the abdomen, to estimate the reliability of deployment and the plausibility of the use in jejuno-jejunal (JJ)- and gastrojejunal (GJ)-anastomosis creation. Results: The presented folding anastomosis device was shown to deploy through an endoscope device channel and a catheter with an inner diameter of 3.2 mm. After deployment the device folds reliably into a ring with an outer diameter of 7–8 mm. The folded device was shown to exhibit a coupling force comparable to similar cases of JJ-anastomosis creation. It is concluded that the presented design of a folding magnetic ring is suitable for select cases of magnetic compression anastomosis where the device is either delivered through a catheter to fold into an anastomosis ring larger than the deployment port or through an endoscopes device channel to allow for convenient visual confirmation of the device during placement.