三軸加速規應用於患者功能性活動坐到站評估之探討

The Investigation of Accelerometry with Application in Sit-To-Stand Motion Analysis of Patients

近年來研究文獻開始利用加速規應用於坐到站之動作分析， 主要原因為加速規體積小、低單價、可長時間記錄數據且方便於臨床醫療及居家環境中的使用，也是許多文獻建議可以在臨床上使用量化患者的動作表現的優良工具之一， 加速規評估坐到站的活動之參數值和光學式動作分析系統及力板的數值有一致性， 確立良好的建構效度， 而油速規所測得的參數值對於運動介入後肌力、平衡及功能性活動能力的改變比一般的臨床測試有較高的敏感度，參數值也呈現良好的再測信度，而加速規結合功能性坐立測試的研究中，藉由加速規的參數值可以獲得完成時間外，還能提供更多軀幹和肢體的動作表現及動作分期的資訊，並發展為自動偵測患者動作品質的評估工具， 進而鑑別不同族群的坐到站表現，提供預測跌倒的量化資料：對於加速規在評估坐到站活動的建議配戴位置以靠近身體重心部位如：腰椎、胸骨或股骨大轉子，和大腿外側中間位置主要用來測量矢狀面的移動速率，常用參數值為加速度均方根和角速度。

Recent studies have frequently investigated the application of accelerometry in sit-tostand task (STS), because of its advantages with include its being inexpensive, ecological and simple to use clinically. Many studies have confirmed accelerometryto be a valid and reliable tool for the examination of STS movement comparing it with force platforms and opto-electronic devices. Moreover, accelerometryhas been used todiscriminategroups with different STS performance and to detect improvement in strength, balance in elderly after receiving exercise intervention, as well as prediction of fall risk. Combining clinical functional test and accelerometry provides an easy and accurate way to obtain more data of quantify movement timing, postural control, and motion analysis compared with performing clinical functional test alone.The placement of accelerometric sensors during STS task close to body center of mass (e.g. lumber, sternum and hip) and sensitive to sagittal direction (e.g. medial point of lateral thigh) have been widely applied, and the parameters derived from are root means square (RMS) of acceleration and angular velocity in the related studies.