压力对脊椎损伤患者骶骨软组织应力分布及肌氧影响分析  

Effects of Pressure on Soft Tissue Stress Distribution and Muscle Oxygenation in Sacrum Area for Persons with Spinal Cord Injury

作　　者：李建平[1] 李增勇[1] 

机构地区：[1]山东大学机械工程学院,济南250061

出　　处：《生物医学工程学杂志》2012年第6期1105-1108,共4页Journal of Biomedical Engineering

基　　金：国家自然科学基金资助项目(30870652;81071223);山东省自然科学基金资助项目(ZR2010HM024);山东大学自主创新基金资助项目(2010JQ007)

摘　　要：骶骨部位为长期卧床患者压疮的易发区域,这与骶骨处持续受压有关。压力一方面改变深层软组织的应力分布,另一方面影响软组织内肌氧参数。本文通过建立人体平躺时骶骨处软组织有限元模型,分析人体平躺时骶骨处软组织的应力分布;同时应用近红外光谱法检测10名脊椎损伤患者施压前后的肌氧变化。研究结果表明:应力主要集中在肌肉层,骶骨与软组织界面层的应力最大,当施加10kPa压力时,肌肉层中最大应力可达15kPa。肌氧参数随压力施加有明显变化,其中肌氧饱和度随压力施加明显下降,压力撤去后回升到正常水平。Sacrum area is the highrisk area for pressure ulcer to persons with spinal cord injury. A finite element model of the soft tissue in the sacrum area was established to analyze the stress distribution in the soft tissue with the human body lying down. In addition,the muscle oxygenation in the sacrum area was assessed by nearint^rared spec troscopy （NIRS） before and after loading pressures. The results showed that the stress was mainly localized in the muscle layer and the stress in the bonetissue interface was the maximal. When the loading reached 10kPa, the maxi ma/ Stress in the muscle layer was 15kPa. The muscle oxygenation parameters changed significantly with the applied pressure and returned to normal level after the loading.

关 键 词：压疮 软组织 有限元分析 肌氧饱和度 

分 类 号：R318.01[医药卫生—生物医学工程]