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Interrupted coalescent nitinol clip versus continuous suture coronary anastomosis: a comparative endothelial function
Roland G Demaria1, Simon Fortier, Olivier Malo
1Department of Surgery and Research Center, Montreal Heart Institute, Montreal, Quebec, Canada.
The Heart Surgery Forum
|April 30, 2003
Summary
Nitinol U-clips for coronary anastomosis do not cause endothelial dysfunction compared to traditional sutures. This study found no significant differences in vascular reactivity, indicating safe use in surgical procedures.
Area of Science:
- Cardiovascular Surgery
- Biomaterials Science
- Vascular Biology
Background:
- A novel penetrating stapled anastomotic system utilizing nitinol microclips (Coalescent Surgical U-Clip) has been developed.
- This system aims to create compliant interrupted sutures for various surgical approaches, including minimally invasive and robotic surgery.
Purpose of the Study:
- To evaluate the impact of nitinol U-Clips on endothelial function in coronary anastomosis.
- To compare the effects of nitinol U-Clips with conventional running sutures on endothelial dysfunction.
Main Methods:
- Ex vivo study using a porcine model with harvested internal thoracic arteries and the left anterior descending artery.
- Anastomoses were created using either nitinol microclips or conventional polypropylene sutures.
- Vascular reactivity was assessed by measuring contraction and endothelium-dependent relaxation responses in organ chambers.
Main Results:
- No significant differences in contractile responses to KCl and prostaglandin F2alpha were observed among the groups.
- Endothelium-dependent relaxation responses to bradykinin showed no statistically significant differences between the nitinol microclip group, suture group, and controls.
Conclusions:
- Coalescent nitinol U-Clips used for anastomosis do not induce endothelial dysfunction.
- The nitinol U-Clip system facilitates compliant anastomoses under satisfactory conditions.