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How should we preclot knitted Dacron grafts?
S J Snooks1, R J Croft, C Wagner
1St. Bartholomew's Hospital, London, England.
Journal of Vascular Surgery
|April 1, 1988
Summary
A two-stage preclotting technique effectively reduces water porosity in Sauvage Bionit-II and DeBakey Vasculour-II Dacron grafts. Further stages do not significantly improve porosity, suggesting a two-stage method is sufficient for graft preparation.
Area of Science:
- Biomaterials Science
- Vascular Surgery
- Textile Engineering
Background:
- Knitted velour Dacron grafts are widely used in vascular reconstructions.
- Effective preclotting is crucial to minimize thrombogenicity and ensure graft patency.
- The Sauvage preclotting technique involves multiple stages to prepare grafts.
Purpose of the Study:
- To evaluate the change in water porosity of Sauvage Bionit-II and DeBakey Vasculour-II grafts during the Sauvage preclotting technique.
- To determine the optimal number of stages required for adequate graft preclotting.
Main Methods:
- Ten Sauvage Bionit-II and ten DeBakey Vasculour-II knitted velour Dacron grafts were studied.
- Water porosity was measured throughout the four stages of the Sauvage preclotting technique.
Main Results:
- Graft porosity significantly decreased (p < 0.001) after stages 1 and 2 for both graft types.
- Stages 3 and 4 of the preclotting technique did not lead to further significant reductions in porosity.
- Both Sauvage Bionit-II and DeBakey Vasculour-II grafts exhibited similar porosity changes.
Conclusions:
- A two-stage preclotting technique is adequate for preparing knitted velour Dacron grafts.
- A final rinse with heparinized blood may further reduce graft thrombogenicity.