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A new aortic root prosthesis with compliant sinuses for valve-sparing operations
M J Thubrikar1, F Robicsek, G G Gong
1Heineman Medical Research Laboratory and the Department of Thoracic and Cardiovascular Surgery, Carolinas Medical Center, Charlotte, North Carolina 28203, USA. mthubrikar@carolinas.org
The Annals of Thoracic Surgery
|June 5, 2001
Summary
A new aortic root prosthesis with flexible sinuses was developed for valve-sparing surgery. The prosthesis demonstrated comparable dynamics to intact aortic roots, supporting its clinical use.
Area of Science:
- Cardiovascular Surgery
- Biomedical Engineering
- Prosthetic Devices
Background:
- Novel aortic root prosthesis design for valve-sparing operations.
- Focus on creating compliant sinuses within the prosthesis.
Purpose of the Study:
- To evaluate the functional dynamics of a novel aortic root prosthesis with compliant sinuses.
- To compare the performance of the prosthesis to intact aortic roots.
Main Methods:
- Surgical implantation of the Dacron graft prosthesis in eight human aortic roots.
- Assessment using a left heart simulator, high-speed video, ultrasound, and mold analysis.
- Comparison with seven intact human aortic roots.
Main Results:
- The prosthetic aortic roots maintained valve competence with rapid leaflet opening.
- Leaflet motion occurred within a circular orifice, avoiding contact with sinus walls.
- Commissural diameter showed significant increases with rising pressure, mimicking native tissue response.
Conclusions:
- The developed aortic graft root exhibited dynamics comparable to intact aortic roots.
- The prosthesis demonstrated effective leaflet motion and sinus dynamics.
- The novel prosthesis is being integrated into clinical practice for aortic valve-sparing procedures.