Related Experiment Videos
Mechanical determinants of graft kinking
P B Dobrin1, D Hodgett, T Canfield
1Department of Surgery, Loyola University Medical Center, Maywood, IL, USA. jmdobrin@aol.com
Annals of Vascular Surgery
|June 21, 2001
Summary
Vascular grafts, especially veins, short, thin-wall, and large-diameter types, are prone to kinking when twisted during surgery. Understanding these factors is crucial for preventing graft obstruction and ensuring successful bypass procedures.
Area of Science:
- Biomedical Engineering
- Vascular Surgery
Background:
- Vascular graft twisting during implantation can lead to kinking and obstruct blood flow.
- Identifying mechanical factors influencing graft kinking is essential for surgical success.
Purpose of the Study:
- To investigate the mechanical factors contributing to vascular graft kinking.
- To determine which graft characteristics increase susceptibility to kinking.
Main Methods:
- In vitro experiments using human saphenous veins and polytetrafluoroethylene (PTFE) grafts of varying dimensions.
- Grafts were subjected to controlled twisting and perfusion under different pressures and flow rates until kinking occurred.
Main Results:
- Vein grafts, short grafts, thin-wall grafts, and large-diameter grafts were found to be particularly susceptible to kinking.
- Specific combinations of graft material, length, diameter, wall thickness, pressure, and flow rate influence kinking.
Conclusions:
- Surgeons must exercise caution with specific graft types (vein, short, thin-wall, large-diameter) to prevent kinking.
- Careful consideration of graft properties and implantation technique is vital to avoid obstruction in bypass surgery.