用于测量Boston支具表面压力的无线压力传感器研制

背景：Boston支具广泛应用于青少年特发性脊柱侧凸（AIS）的矫形治疗，其力学设计仍待进一步改进。一些研究通过测量支具对躯体的作用力来探究支具的生物力学原理，但均为实验室测量结果，不能完全反映日常生活中支具对躯体的实际作用力。 目的：研制一种用于测量Boston支具表面压力的无线传感器。 方法：利用单点薄膜压力传感器及无线应变节点构建无线传感器，测量12例接受Boston支具治疗的AIS患者佩戴支具的表面压力以及相关的Cobb角改变。 结果：通过无线压力传感器测得支具上下压点垫片的压力以及臀部压力平均值分别为（5.11±0.66）N、（2.93±0.66）N和（0.86±0.17）N；佩戴支具后Cobb角由33°±13°减小至18°±13°，矫正了（49±27）%。 结论：所研制的无线压力传感器能够测量支具的表面压力，并为研制动态测量支具表面压力的设备提供了雏形。

Development of a wireless pressure sensor for the Boston brace interface pressure measurement

Background：Although Boston brace is widely used in the orthopedic treatment of adolescent idiopathic scoliosis （AIS）, the mechanical design needs further improvement. Some studies explore biomechanical principles by measuring the force from the brace on body, but the laboratory results can not fully reflect the actual force in daily life. Objective：To develop a wireless force system to measure the direct forces exerted by the pads in the Boston brace. Methods：In this study we built a wireless force system with force sensors and wireless system to measure the direct forces exert-ed by the pads in the Boston brace. Then 12 AIS patients wore the brace, and surface pressure and Cobb angles were measured. Results： The force on the upper and lower pads of Boston brace and on the hip were （5.11 ± 0.66） N, （2.93 ± 0.66） N and （0.86±0.17） N, respectively. Cobb angle decreased from 33°±13° to 18°±13° with a correcting rate of （49±27）%. Conclusions：Our system can be used to measure the direct forces exerted by the pads in the Boston brace and allow us to de-velop a system to investigate the force distribution inside the brace during daily activities.