辅助仰卧位侧翻过程压疮易发部位的生物力学建模与实验研究

doi:10.3969/j.issn.0258-8021.2022.03.007

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Abstract A pressure ulcer is a condition in which the long-term pressure on local tissues leads to tissue ulceration and necrosis. Relief of local pressure through supine lateral rotation is one of the effective measures to prevent the development of pressure ulcers in long-term bedridden patients, so it is significant to study the biomechanics of the typical site of pressure ulcers during assisted lateral rotation. Based on anatomical theory, a finite element model of the bones and soft tissues of the pressure ulcer-prone areas of the trunk was established using CT image data to study the maximum stresses on the pressure ulcer-prone areas of the trunk at different lateral turning angles, and a human supine lateral turning experiment was conducted on 10 volunteers using the TEKSCAN pressure distribution test system to verify the correctness of the simulation analysis. Results showed that the stresses on the same part of the body were different during the rollover process, with extreme points of stress peaks at 90° position, producing a stress concentration phenomenon. The peak stresses at each part of the shoulder and hip were relatively evenly balanced within the angular threshold range of 30° to 45°, both at 0.035~0.070 MPa, indicating that the body was in contact with multiple parts of the auxiliary surface within this threshold and that the stresses are more dispersed, with a form of contact between the two that optimized pressure on multiple pressure ulcer prone areas. This study demonstrated the changes in pressure on pressure-prone areas of the trunk during assisted supine lateral rotation, and the obtained results would be useful for the design and use of supine lateral rotation aids and as a reference for clinical care.

Key words： turning over from supine position the common sites of pressure ulcers three-dimensional reconstruction contact pressure

Received: 09 June 2021

PACS:

R318

Corresponding Authors: ^*E-mail: supeng@bistu.edu.cn

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	Articles by authors
	Lun Qinglong
	Su Peng
	Lu Da
	Li Shuo
	Li Jian

Cite this article:

Lun Qinglong,Su Peng,Lu Da, et al. Biomechanical Modeling and Experimental Study on the Common Sites of Pressure Ulcers inthe Process of Assisted Turning over from Supine Position[J]. Chinese Journal of Biomedical Engineering, 2022, 41(3): 310-319.

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http://cjbme.csbme.org/EN/10.3969/j.issn.0258-8021.2022.03.007 OR http://cjbme.csbme.org/EN/Y2022/V41/I3/310

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