Vein Graft Interposition
Vein Graft Interposition - Related Videos
15:21
Training a Sophisticated Microsurgical Technique: Interposition of External Jugular Vein Graft in the Common Carotid Artery in Rats
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Cited by 9 •
2012
Neointimal hyperplasia is the primary cause of stenosis in arterialized veins. We propose a new protocol whereby the right external jugular vein is grafted using the cuff technique in the common carotid artery of Sprague Dawley rats. The survival rate was 100 % at the time point of sacrifice.
12:39
Implantation of Inferior Vena Cava Interposition Graft in Mouse Model
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Cited by 24 •
2014
To improve our knowledge of cellular and molecular neotissue formation, a murine model of the TEVG was recently developed. The grafts were implanted as infrarenal vena cava interposition grafts in C57BL/6 mice. This model achieves similar results to those achieved in our clinical investigation, but over a far shortened time-course.
07:22
Vein Interposition Model: A Suitable Model to Study Bypass Graft Patency
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Cited by 3 •
2017
This video demonstrates a model to study the development of myointimal hyperplasia after venous interposition surgery in rats.
13:58
A Rabbit Model of Durable Transgene Expression in Jugular Vein to Common Carotid Artery Interposition Grafts
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Cited by 2 •
2018
This method describes the placement of interposition vein grafts in rabbits, the transduction of the grafts, and the achievement of durable transgene expression. This allows the investigation of physiological and pathological roles of transgenes and their protein products in grafted veins, and testing of gene therapies for vein graft disease.
04:33
Carotid Artery and Jugular Vein Interposition: A Technique to Induce Venous Intimal Hyperplasia in Rabbit Model
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2025
This video demonstrates the interposition of the rabbit carotid artery with the jugular vein to induce venous intimal hyperplasia by subjecting the veins to arterial pressure. This model will help investigate molecular and genetic interventions to attenuate the progression of intimal hyperplasia after revascularization surgeries.
FAQs
Excessive tension can make direct closure unsuitable when a vessel segment is missing or damaged. Interposing a vein segment creates a length-adjusted bridge between the vessel ends, allowing the repair to be secured through vascular anastomoses without forcing the native ends together. This principle supports restoration of blood flow while reducing the mechanical difficulty associated with closing a gap directly.
Appropriate graft sizing and adequate blood flow are central to maintaining graft patency, meaning continued openness of the reconstructed channel. A graft must provide a suitable conduit across the defect, while blood flow supports passage through the repair. These factors work together with meticulous surgical technique to promote healing and preserve downstream perfusion after reconstruction.
Direct closure brings the damaged vessel ends together, but that approach may create excessive tension when a segment is missing or the gap is substantial. Vein graft interposition instead accommodates the defect by placing a conduit between the ends and securing each junction with an anastomosis. The distinction is therefore based on how continuity is restored when the native vessel cannot be joined safely under low tension.
The procedure begins by identifying the damaged or absent vessel segment and selecting a suitable vein graft source. The graft is positioned between the vessel ends, with attention to appropriate sizing and alignment. Surgeons then secure the connections through vascular anastomoses and assess the reconstruction in relation to blood flow, healing requirements, and preservation of downstream tissue perfusion.
This reconstruction may be selected when vascular continuity is disrupted by trauma, tumor resection, or a complex vessel repair. It is particularly relevant when the vessel gap cannot be closed directly without excessive tension. By creating a conduit across the defect, the technique can help reestablish perfusion and support preservation of tissue supplied by the reconstructed vessel.
Key outcomes include graft patency, healing of the reconstruction, and restoration of downstream perfusion. Patency indicates whether the graft remains open enough to carry blood across the repaired segment. Evaluation also considers whether the anastomoses and graft provide functional continuity without compromising the tissue supplied beyond the original vessel injury or resection site.