Short-term changes in upper extremity dynamic mechanical response parameters following power hand tool use.
Short-term changes in upper extremity dynamic mechanical response parameters following power hand tool use.
复制标题
使用电动手持工具后上肢动态机械响应参数的短期变化。
DOI：
10.1080/00140130500142209
复制
发表时间：
2005
期刊：
影响因子：
2.4
通讯作者：
Richard,TG
中科院分区：
文献类型：
--
作者：
Sesto,ME;Radwin,RG;Richard,TG
动态力学响应参数（刚度，阻尼和有效质量），生理特性（强度和肿胀）和症状的动力工具操作前，立即和动力工具操作后24小时测量上肢。在全析因设计中控制工具因素，包括峰值扭矩（3 Nm和9 Nm）和扭矩建立时间（50 ms和250 ms）。二十九个没有经验的电动手工具用户被随机分配到四个条件之一，并在实验室中操作手枪式握把扳手每分钟4次，持续1小时。使用工具后即刻（15%）（p<0.01）和24 h后（9%）（p<0.05）等长强度降低。 刚度（p<0.05）和有效质量（p<0.05）的力学参数受建立时间的影响。 在长时间（250 ms）的建立时间内，手枪式握把扳手操作后立即观察到上肢的刚度（43%）和有效质量（57%）平均下降。先前开发的生物力学模型用于估计与实验中的工具因素相关的手柄力和位移。与最大预测手柄力和位移相关的条件具有最大的机械刚度和有效质量降低，以及最大的局部不适增加。
Dynamic mechanical response parameters (stiffness, damping and effective mass), physiological properties (strength and swelling) and symptoms of the upper limb were measured before power tool operation, immediately following and 24 h after power tool operation. Tool factors, including peak torque (3 Nm and 9 Nm) and torque build-up time (50 ms and 250 ms), were controlled in a full factorial design. Twenty-nine inexperienced power hand tool users were randomly assigned to one of four conditions and operated a pistol grip nutrunner four times per min for 1 h in the laboratory. Isometric strength decreased immediately following tool use (15%) (p< 0.01) and 24 h later (9%) (p< 0.05). Mechanical parameters of stiffness (p< 0.05) and effective mass (p< 0.05) were affected by build-up time. An average decrease in stiffness (43%) and effective mass (57%) of the upper limb was observed immediately following pistol grip nutrunner operation for the long (250 ms) build-up time. A previously developed biomechanical model was used to estimate handle force and displacement associated with the tool factors in the experiment. The conditions associated with the greatest predicted handle force and displacement had the greatest decrease in mechanical stiffness and effective mass, and the greatest increase in localized discomfort.