S-Space College of Engineering/Engineering Practice School (공과대학/대학원) Dept. of Chemical and Biological Engineering (화학생물공학부) Chemical Convergence for Energy and Environment (에너지환경 화학융합기술전공) Journal Papers (저널논문_에너지환경 화학융합기술전공)
Mechanics of stretchable electronics on balloon catheter under extreme deformation
- Su, Yewang; Liu, Zhuangjian; Wang, Shuodao; Ghaffari, Roozbeh; Kim, Dae-Hyeong; Hwang, Keh-Chih; Rogers, John A.; Huang, Yonggang
- Issue Date
- International Journal of Solids and Structures, Vol.51 No.7-8, pp.1555-1561
- Stretchable electronics has been applied to balloon catheters for high-efficacy ablation, with tactile sensing integrated on the surface, to establish full and conformal contact with the endocardial surface for elimination of the heart sink caused by blood flow around their surfaces. The balloon of the catheter folds into uniform 'clover' patterns driven by the pressure mismatch inside (similar to vacuum) and outside of the balloon (pressure similar to 1 atm). The balloon catheter, on which microelectrodes and interconnects are printed, undergoes extreme mechanical deformation during its inflation and deflation. An analytic solution is obtained for balloon catheter inflation and deflation, which gives analytically the distribution of curvatures and the maximum strain in the microelectrodes and interconnects. The analytic solution is validated by the finite element analysis. It also accounts for the effect of inflated radius, and is very useful to the optimal design of balloon catheter. Crown Copyright (C) 2014 Published by Elsevier Ltd. All rights reserved.
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