Functional Control Systems, Graduate School of Engineering and Science, Shibaura Institute of Technology, Saitama, Japan.
Department of Bio-Science and Engineering, College of Systems Engineering and Science, Shibaura Institute of Technology, Saitama, Japan.
Cardiovasc Eng Technol. 2021 Aug;12(4):407-417. doi: 10.1007/s13239-021-00529-8. Epub 2021 Mar 15.
The aims of this study were to develop an experimental procedure for setting the catheter angle with respect to the surface of the heart muscle and the catheter contact force and to investigate the catheter contact area on the heart muscle as a function of catheter contact angle and force.
Visualization tests were performed for 5 contact angles (0°, 30°, 45°, 60°, and 90°) and 8 contact forces (2, 4, 6, 10, 15, 20, 30, and 40 gf). Each experiment was repeated 6 times with 2 different commercially available catheter tips.
The morphology of the contact area was classified into rectangular, circular, ellipsoidal, and semi-ellipsoidal. The correlation between contact force and contact area was a logarithmic function; increasing contact force was associated with increased contact area. At the same contact force, the correlation between contact angle and contact area was inverse; decreasing contact angle was associated with a corresponding increase in contact area.
Both the catheter contact angle and contact force substantially impact the contact area and morphology in catheter ablation procedures.
本研究旨在开发一种针对心脏表面的导管角度和导管接触力的实验程序，并研究导管接触角和力与心肌导管接触面积之间的关系。
对 5 种接触角（0°、30°、45°、60°和 90°）和 8 种接触力（2、4、6、10、15、20、30 和 40 gf）进行了可视化测试。每个实验重复进行了 6 次，使用了 2 种不同的市售导管尖端。
接触区域的形态分为矩形、圆形、椭圆形和半椭圆形。接触力与接触面积之间的相关性为对数函数；接触力增加与接触面积增加相关。在相同的接触力下，接触角与接触面积之间的相关性呈反比；接触角减小与接触面积相应增加相关。
在导管消融过程中，导管的接触角和接触力都会显著影响接触面积和形态。
