Colloca Christopher J, Keller Tony S, Black Pierre, Normand Martin C, Harrison Deed E, Harrison Donald D
Neuromechanical Innovations, L.L.C, USA.
J Manipulative Physiol Ther. 2005 Jul-Aug;28(6):414-22. doi: 10.1016/j.jmpt.2005.06.004.
To quantify the force-time and force-delivery characteristics of six commonly used handheld chiropractic adjusting devices.
Four spring-loaded instruments, the Activator Adjusting Instrument; Activator II Adjusting Instrument, Activator III Adjusting Instrument, and Activator IV Adjusting Instrument, and two electromechanical devices, the Harrison Handheld Adjusting Instrument and Neuromechanical Impulse Adjusting Instrument, were applied to a dynamic load cell. A total of 10 force-time histories were obtained at each of three force excursion settings (minimum to maximum) for each of the six adjusting instruments at preload of approximately 20 N.
The minimum-to-maximum force excursion settings for the spring-loaded mechanical adjusting instruments produced similar minimum-to-maximum peak forces that were not appreciably different for most excursion settings. The electromechanical adjusting instruments produced short duration ( approximately 2-4 ms), with more linear minimum-to-maximum peak forces. The force-time profile of the electromechanical devices resulted in a more uniform and greater energy dynamic frequency response in comparison to the spring-loaded mechanical adjusting instruments.
The handheld, electromechanical instruments produced substantially larger peak forces and ranges of forces in comparison to the handheld, spring-loaded mechanical devices. The electromechanical instruments produced greater dynamic frequency area ratios than their mechanical counterparts. Knowledge of the force-time history and force-frequency response characteristics of spinal manipulative instruments may provide basic benchmarks and may assist in understanding mechanical responses in the clinical setting.
量化六种常用手持式整脊调整器械的力-时间和力传递特性。
将四种弹簧加载器械，即激活器调整器械、激活器II调整器械、激活器III调整器械和激活器IV调整器械，以及两种机电设备，即哈里森手持式调整器械和神经机械脉冲调整器械，应用于动态测力传感器。在大约20 N的预载下，对六种调整器械中的每一种，在三个力偏移设置（最小到最大）中的每一个设置下总共获得10个力-时间历程。
弹簧加载机械调整器械的最小到最大力偏移设置产生了相似大小的最小到最大峰值力，在大多数偏移设置下没有明显差异。机电调整器械产生的持续时间较短（约2 - 4毫秒），最小到最大峰值力更呈线性。与弹簧加载机械调整器械相比，机电设备的力-时间曲线导致更均匀且更大的能量动态频率响应。
与手持式弹簧加载机械设备相比，手持式机电器械产生的峰值力和力范围要大得多。机电器械产生的动态频率面积比高于其机械同类器械。了解脊柱推拿器械的力-时间历程和力-频率响应特性可能提供基本基准，并有助于理解临床环境中的机械反应。
