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A method for constricting large veins for use in arterial vascular reconstruction
A Moritz1, F Grabenwöger, A Windisch
1II. Chirurgische Universitätsklinik, University of Vienna, Austria.
Artificial Organs
|October 1, 1990
Summary
Resorbable mesh tubes, specifically polydioxanon (PDS) reinforced polyglactin (Vicryl) mesh, effectively create appropriately sized vascular grafts from veins by inducing neoarterial wall growth. This method shows promise for improving vascular graft outcomes.
Area of Science:
- Biomaterials Science
- Vascular Surgery
- Regenerative Medicine
Background:
- Vascular grafts are crucial for bypassing damaged arteries.
- Unusable veins can be repurposed as grafts but often dilate excessively.
- Constrictive mesh wrapping aims to control graft diameter and promote neotissue formation.
Purpose of the Study:
- To evaluate if resorbable constrictive mesh tubes induce neoarterial wall growth for appropriately sized vascular grafts.
- To compare the efficacy of different mesh materials (Vicryl, PDS-reinforced Vicryl, Dacron) in controlling venous graft diameter.
Main Methods:
- Sheep carotid artery resection and external jugular vein interposition graft.
- Grafts were wrapped with Vicryl, PDS-reinforced Vicryl, or Dacron mesh to achieve a 7 mm diameter.
- Control group: unreinforced venous grafts.
- Angiography performed at 6 months to assess graft diameter and morphology.
Main Results:
- Unreinforced veins dilated significantly (mean 19 mm).
- Vicryl mesh grafts showed aneurysmal dilatation (mean 19 mm).
- PDS-reinforced Vicryl grafts maintained a smaller diameter (mean 7.4 mm) with minimal aneurysms.
- Dacron mesh grafts achieved target diameter but had proximal anastomotic narrowing.
- PDS wrapping significantly reduced maximal graft diameter compared to native vein.
Conclusions:
- Resorbable meshes, particularly PDS-reinforced Vicryl, can effectively reduce venous graft diameter.
- This technique promotes controlled neotissue ingrowth, creating more suitable vascular grafts.
- PDS-reinforced mesh shows superior performance in maintaining graft patency and size compared to other materials tested.