SKELETAL TRACKING WITH SKELETAL FIXATION

通过骨骼固定进行骨骼追踪

• 批准号: 3747982
• 负责人: J P HOLDEN
• 金额: --
• 依托单位: NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES
• 依托单位国家: 美国
• 资助国家: 美国
• 起止时间: 至
• 项目状态: 未结题
• 来源: https://reporter.nih.gov/project-details/3747982
• 关键词: biomechanics; biomedical equipment development; body movement; diagnosis quality /standard; gait; human subject; knee; leg; limb movement; patient monitoring device; skin

Kinematic gait analysis is increasingly used for a wide variety of purposes, including clinical evaluation to aid surgical decision-making and the study of joint and limb motion for the design of prostheses and braces. Standard gait analysis procedures currently involve the estimation of skeletal motion by tracking the movement of targets placed on the skin. The motion of the skin and underlying soft tissues relative to the bone is known to be a source of error in the measurement of skeletal motion, but the magnitude and pattern of the soft tissue motion has not been reported in the literature. The purpose of this project is to determine the degree and pattern of error introduced into standard kinematic gait analysis procedures by soft tissue motion around the femur and shank. A critical initial phase of this project is the development of a relatively safe, simple, and reproducible method for attaching and tracking targets fixed to bone. Measurement of actual bone movement is accomplished using a percutaneous skeletal tracker (PST), a device designed to achieve skeletal fixation of targets. A PST is attached to the distal femur and distal shank; surface mounted targets are also attached using standard procedures. A three-dimensional target tracking system measures the movement of both target sets as subjects walk in the laboratory. The six degree-of-freedom motions of the shank and thigh are calculated using each target set, and the difference in motions represents the error introduced into the measurements by the soft tissues. Three subjects have undergone PST placement and data collection without complications. Rigid PST fixation to the distal shank was achieved for each subject. Fixation was not sufficient at the distal femur, however, but several important questions concerning pin placement at the knee were addressed. The skeletal motion data collected for the shank are currently being analyzed.

运动学步态分析越来越多地应用于各种领域 目的，包括临床评估以帮助手术决策 以及研究关节和肢体运动以设计假肢和 大括号。 目前标准步态分析程序涉及 通过跟踪放置目标的运动来估计骨骼运动 在皮肤上。 皮肤和皮下软组织的相对运动 众所周知，骨的测量是误差的来源 骨骼运动，但软组织运动的幅度和模式 文献中未见报道。 该项目的目的是 确定引入标准的错误程度和模式 通过股骨周围的软组织运动进行运动步态分析程序 和小腿。 该项目的关键初始阶段是开发 一种相对安全、简单且可重复的方法来连接和 跟踪固定在骨头上的目标。 实际骨运动的测量是使用经皮测量完成的 骨骼追踪器（PST），一种旨在实现骨骼固定的设备 的目标。 PST 连接至股骨远端和胫骨远端； 表面安装目标也 使用标准程序附上。 三维目标跟踪 当受试者在场景中行走时，系统会测量两个目标集的运动 实验室。 小腿和大腿的六自由度运动为 使用每个目标集和运动差异进行计算 表示软测量引入的误差 组织。 三名受试者接受了 PST 安置和数据收集，但没有 并发症。 实现了对远端柄的刚性 PST 固定 每个科目。 然而，股骨远端的固定还不够， 但有关膝部销钉放置的几个重要问题是 已解决。 为小腿收集的骨骼运动数据是 目前正在分析中。