应用惯性传感单元测量下肢力线的研究  

Measurement of Lower Limb Force Line with Inertial Sensor Unit

作　　者：王家麟 闫俊兰 杨鹏飞[2] 赵家鑫 刘暾 王思源 王伟[1] Wang Jialin;Yan Junlan;Yang Pengfei;Zhao Jiaxin;Liu Tun;Wang Siyuan;Wang Wei(Department of Bone and Joint Surgery,The Second Affiliated Hospital of Xi’an Jiaotong University,Xi’an 710000,China;Northwestern Polytechnical University,Xi’an 710072,China)

机构地区：[1]西安交通大学第二附属医院骨关节外科,陕西西安710000 [2]西北工业大学,陕西西安710072

出　　处：《实用骨科杂志》2022年第10期948-953,957,共7页Journal of Practical Orthopaedics

基　　金：国家自然科学基金面上项目(82072522);国家中医药管理局中西医结合临床协作创新项目(GZY-KJS-2021-002);陕西省中医药管理局中西医结合临床协作创新项目(2020-ZXY-003);陕西省高校联合医工交叉项目(2020GXLH-Y-001)。

摘　　要：目的比较双下肢全长X线片上测量的下肢力线数据与使用基于惯性传感单元的便携式下肢力线测量装置在不同运动方式下测量的下肢力线数据,探索使用该装置测量人体下肢力线的适宜姿势,并评价其可行性及测量准确性。方法选取健康成年志愿者15名,由其佩戴本研究设计的基于惯性传感单元的便携式下肢力线测量装置,采用站立位膝关节伸直状态下行髋关节屈曲运动、外展运动、环转运动以及仰卧位膝关节伸直状态下行髋关节屈曲运动和外展运动等5种特定运动方式,测量下肢髋-膝-踝角度(hip-knee-ankle angle,HKA)、机械轴偏向(mechanical axis deviation,MAD)、机械轴股骨远端外侧角(mechanical lateral distal femur angle,mLDFA)及胫骨近端内侧角(medial proximal tibia angle,MPTA)大小;并对全部15名志愿者均拍摄双下肢全长X线片,由三位医师分别测量其下肢HKA角、MAD值、mLDFA及MPTA大小,将两种方法测出的下肢力线及角度数据结果进行比较分析。结果志愿者在处于仰卧位下肢矢状面内髋关节屈曲运动时测得的HKA、MAD、mLDFA、MPTA值与双下肢全长片上测量的值差异无统计学意义(P>0.05);而在站立位矢状面、站立位冠状面、站立位环转运动和仰卧位冠状面测得的HKA、MAD、mLDFA、MPTA数值和双下肢全长片相比差异均有统计学意义(P<0.05)。进一步一致性分析发现,下肢力线测量装置在仰卧位矢状面运动获得的数据与双下肢全长片测量数据,二者一致性较好。结论被测试者处于仰卧位并在矢状面内行髋关节屈曲运动时,基于惯性传感单元的便携式下肢力线测量装置可以替代下肢全长片来测量正常人的HKA、MAD、mLDFA及MPTA。Objective To compare the force line data of lower limbs measured on the full-length piece with that measured by the portable force line measuring device based on the inertial sensor unit under different motion modes,to explore the appropriate posture for measuring the force line of lower limbs,and to evaluate its feasibility and accuracy.Methods 15 healthy adult volunteers weared portable power line measuring device based on the inertial sensing unit designed for this study.Hip flexion movement,abducent movement,rotation movement and supine knee straight downward hip flexion movement and outreach were performed when the patients standed with knee straight.Hip-knee-ankle angle(HKA)and mechanical axis deviation(MAD)mechanical lateral distal femur angle,mLDFA and the medial proximal tibia angle(MPTA)of the tibia were measured.Full-length X-ray films of lower limbs were taken for all 15 volunteers.The HKA angle,MAD value,mLDFA and MPTA of lower limbs were measured by three physicians respectively.The force lines and angle data measured by the two methods were compared and analyzed.Results There were no significant differences in HKA,MAD,mLDFA and MPTA values between volunteers in the sagittal plane of the lower extremity in supine position and those measured on the full-length radiographs of the lower extremities(P>0.05).The HKA,MAD,mLDFA and MPTA values measured in standing sagittal plane,standing coronal plane,standing rotatory motion and supine coronal plane were statistically different from those measured in full-length radiographs(P<0.05).Further consistency analysis showed that the data obtained by the lower extremity force line measurement device in the supine sagittal plane were in good consistency with the data measured by the full-length film of both lower extremities.Conclusion When the subjects are in supine position and performed hip flexion motion in sagittal plane,the portable lower limb force line measurement device based on inertial sensor unit can replace the full length of the lower limb to measure

关 键 词：膝骨关节炎 下肢力线 传感器 下肢全长片 

分 类 号：R684.3[医药卫生—骨科学]