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Microvascular surgical experimental thrombosis model: rationale and design
R A Kersh1, J Handren, C Hergrueter
1Microsurgery Laboratory, Massachusetts General Hospital, Boston.
Plastic and Reconstructive Surgery
|May 1, 1989
Summary
A new surgical model, the arterial inversion graft (AIG), effectively induces microvascular thrombosis in rabbits. Graft length directly correlates with the incidence of arterial occlusion, offering experimental control.
Area of Science:
- Vascular Surgery
- Thrombosis Research
- Animal Models
Background:
- Microvascular thrombosis is a critical factor in various vascular diseases.
- Developing reliable surgical models is essential for studying thrombosis.
- Existing models may lack precise control over occlusion incidence.
Purpose of the Study:
- To introduce and evaluate a novel surgical model for inducing microvascular thrombosis.
- To assess the efficacy of the arterial inversion graft (AIG) in rabbits.
- To determine the relationship between AIG length and thrombotic occlusion.
Main Methods:
- The arterial inversion graft (AIG) technique involves excising, inverting, and resuturing arterial segments.
- New Zealand white rabbits underwent femoral artery AIG creation of 2, 5, or 10 mm lengths.
- Vessel patency was assessed using the "milking test" at 1 hour and 7 days post-surgery.
Main Results:
- Occlusion incidence increased with AIG length at both time points.
- At 1 hour: 30% (2 mm), 80% (5 mm), 100% (10 mm).
- At 7 days: 65% (2 mm), 90% (5 mm), 100% (10 mm).
Conclusions:
- The AIG model provides a tunable method for controlling thrombotic occlusion.
- Graft length is a key determinant of occlusion incidence in this model.
- The AIG model is suitable for experiments requiring specific levels of microvascular occlusion.