Influence of valve height on the opening/closure performance of transplanted aortic valve.
10.7507/1001-5515.201709061
- Author:
Hui LI
1
;
Youlian PAN
1
;
Aike QIAO
2
;
Yinglong LIU
3
;
Nianguo DONG
4
Author Information
1. College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, P.R.China.
2. College of Life Science and Bioengineering, Beijing University of Technology, Beijing 100124, P.R.China.qak@bjut.edu.cn.
3. Center of Infant Heart, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R.China.
4. Department of Cardiovascular Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, P.R.China.
- Publication Type:Journal Article
- Keywords:
aortic root;
leaflet contact force;
leaflet opening area;
maximum stress value;
valve transplantation
- MeSH:
Aortic Valve;
physiology;
surgery;
Aortic Valve Insufficiency;
surgery;
Heart Valve Prosthesis;
Humans;
Models, Cardiovascular
- From:
Journal of Biomedical Engineering
2019;36(2):199-205
- CountryChina
- Language:Chinese
-
Abstract:
Valve transplantation is often used in the treatment of aortic valve insufficiency. However, after surgery, the reconstructed aortic roots have an expansion phenomenon, in which the lack of valve height causes the aortic valve to close again. In this paper, the effects of different aortic valve height design on valve opening and closing performance were studied. The optimal surgical plan was obtained by numerical simulation, providing technical support and theoretical basis. In this paper, six groups of three-dimensional geometric models with a valve height increment of ± 0.5 mm were established with a root diameter of 26.0 mm and a valve height of 14.0 mm. Through the structural mechanics calculation and analysis of the parameters such as maximum stress, valve area and contact force of the model, reasonable geometrical dimensions are obtained. The study found that the maximum stress values of the six groups of models ranged from 640 to 690 kPa, which was consistent with the results of the literature; the three-group models with valve heights of 13.5 mm, 14.0 mm, and 14.5 mm were within a reasonable range. The contact force value of the 6 groups of leaflets increased with the increase of valve height. Studies have shown that the height of the aortic valve has an effect on the aortic valve closure performance. A valve height that is too small or too large will reduce the aortic systolic valve area and affect the aortic function.
