Document Detail

Experimental study of a novel mechanical connector for sutureless open arterial anastomosis.
MedLine Citation:
PMID:  22136752     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: This study assessed the feasibility and efficacy of a new sutureless connector for end-to-end arterial anastomosis.
METHODS: The anastomotic device is a connector consisting of a bare-metal stent with spikes covering its outer surface, which is introduced through the prosthesis. The seal of the anastomosis is obtained by inflating a balloon anchoring the stent with the spikes in the prosthesis and in the receiving artery. This experiment was conducted in three phases: (1) A feasibility study was done on four cadaveric femoral arteries using a polytetrafluoroethylene prosthesis, with measurement of the penetration of the spikes into the layers of the arterial wall. (2) Bench tests were conducted in seven automated and in seven sutured anastomoses. Anastomosis sealing was tested using a pump system (≤250 mm Hg) in a water-filled closed circuit. (3) The infrarenal aorta of seven pigs was replaced with a 6- to 8-mm diameter prosthesis, using this automated device for the proximal anastomosis. The distal anastomosis was handsewn on the aortic bifurcation. After completion angiography, animals were euthanized for macroscopic and histologic studies of the aorta, connector, and prosthesis. Explantations were done immediately (2 pigs), and at 15 (2 pigs), at 30 (2 pigs), and 42 days (1 pig). Study end points were the automated anastomosis time compared with manual suturing, leakage, mechanical strength, and patency of the anastomosis together with the histologic changes of the aortic wall in contact with the spiked stent.
RESULTS: Tests performed on four cadaveric arteries showed complete penetration of the spikes into the arterial wall layers without metal fracture. Tests of traction showed that the median force needed to rupture the automated anastomosis was 18.3 N (interquartile range [IQR], 17.7-19.9 N), with no significant difference from the handmade anastomosis (19.5 N; IQR, 17.9-20.2 N, P = .33). No leakage was demonstrated in vitro with a pulsatile flow and a pressure up to 250 mm Hg. The median automated anastomosis time on pig aorta was 2.4 minutes (IQR, 1.4-3.3 min) vs 17.0 minutes (IQR, 15.1-17.2 minutes) for the handmade aortic anastomosis performed on the same animals (P = .002). There was no anastomotic leak. Histology showed incorporation of the connector spikes in the aortic wall, without intimal hyperplasia or false aneurysm.
CONCLUSIONS: This preliminary study confirms the feasibility of this sutureless system, suggesting its usefulness for a faster and simpler anastomosis in hybrid arterial surgery.
Salam Abou Taam; Jean-François Garbé; Mourad Boufi; Jean-Pierre Bossavy; Jean-Baptiste Ricco
Publication Detail:
Type:  Evaluation Studies; Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-12-03
Journal Detail:
Title:  Journal of vascular surgery     Volume:  55     ISSN:  1097-6809     ISO Abbreviation:  J. Vasc. Surg.     Publication Date:  2012 Jan 
Date Detail:
Created Date:  2011-12-20     Completed Date:  2012-02-02     Revised Date:  2012-10-03    
Medline Journal Info:
Nlm Unique ID:  8407742     Medline TA:  J Vasc Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  210-5     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Society for Vascular Surgery. Published by Mosby, Inc. All rights reserved.
Department of Vascular Surgery, University Hospital, Toulouse-Rangueil, Toulouse, France.
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MeSH Terms
Anastomosis, Surgical / instrumentation
Angioplasty, Balloon / adverse effects,  instrumentation*
Aorta / surgery*
Blood Vessel Prosthesis*
Blood Vessel Prosthesis Implantation / adverse effects,  instrumentation*
Feasibility Studies
Femoral Artery / surgery*
Materials Testing
Models, Anatomic
Models, Animal
Prosthesis Design
Time Factors
Reg. No./Substance:

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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