Finite element analysis of biomechanical effects of balloon expander on pediatric knee joint(PDF)
《中国医学物理学杂志》[ISSN:1005-202X/CN:44-1351/R]
- Issue:
- 2023年第4期
- Page:
- 503-511
- Research Field:
- 生物材料与力学
- Publishing date:
Info
- Title:
- Finite element analysis of biomechanical effects of balloon expander on pediatric knee joint
- Author(s):
- ZHOU Tianpeng1; GU Xuelian1; 2; LI Hai3; ZHOU Jincheng1; LIU Yutian1; ZHAO Yuxuan1
- 1. School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 2. Shanghai Engineering Research Center of Interventional Medical Device, Shanghai 200093, China 3. Department of Pediatric Orthopaedic Surgery, Xinhua Hospital, Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
- Keywords:
- Keywords: balloon expander pediatric knee joint cartilage finite element analysis
- PACS:
- R318
- DOI:
- DOI:10.3969/j.issn.1005-202X.2023.04.017
- Abstract:
- Abstract: Objective To establish the three-dimensional solid model of normal knee joint and the three-dimensional finite element models of knee joint treated with complete balloon distraction based on MRI images of pediatric knee joint, and to analyze the biomechanical effects of balloon expander in separate or integrated design on knee joint using finite element method. Methods The finite element model of pediatric knee joint was established using medical modeling software for simulating arthroscopic operation. Two kinds of balloon expander models were established, and different pressures were applied to the balloon expander models for exploring the stress distribution under the interaction between the different balloon expanders (3 different shapes of the balloon in the separate design and annular balloon with different short axis sizes in the integrated design) and the knee joint cartilage, thereby obtaining the optimal design for balloon expander. Results When the expander and knee arthroscope were designed separately, the peak stress of cartilage was less affected by spherical balloon. When the expander was designed in an integrated way, and the short half axis was gradually increased from 3.0 mm, the stress peak of the annular balloon changed little, and the stress peak on the cartilage was relatively small, indicating that an annular balloon with a short half axis of 3.0 mm was a better choice. Conclusion The balloon expander can effectively open certain knee space, and the integrated design of the balloon expander has less effect on the knee joint than the separate design. The study provides a theoretical basis for the geometric design of the balloon expander and improves the safety of meniscus surgery.
Last Update: 2023-04-25