Spin To Mention The Way The Treatment Of Cervical Radicular Disease Process, Cervical Displacement Experimental Research

Objectives: [1] To study the mechanical parameters and summarize the mechanical characteristics of rotatory lifting technic. [2] to develop a pulsed-wave mode dynamic photogrammetry system; [3] to study the displacement changes of the cervical specimens during rotatory lifting technic and the mechanism of action of the cervical manipulation.Methods: [1] The in vivo biomechanical method was adopted to measured the mechanical parameters (include the force,the duration and the acceleration) with a mechanical measurement appearance during the rotatory lifting technic that performed by the same therapist to 15 patients of radicular type of cervical spondylosis. [2] According the theory of stereo vision based on computer image processing, the photogrammetry system was made up of several optical fibers,a optical isolator switch output card,two digital cameras and two computers, and its control programs were designed using Delphi 5.0. [3] Six human cervical spine specimens, obtained from fresh human cadavers, were tested during rotatory lifting technic simulated by material test system (MTS) while measuring the motions of the transverse processes,the articular processes and the spinous processes.Results: [1] The average value of the parameters of the rotatory lifting technic were as follows: The preload force is 15.15±5.11kg; The peak force is 27.24±8.81kg; The thrust force is 14.29±5.15kg; The thrust duration is 114.33±16.98ms; The peak acceleration is -0.35±0.11g; The thrust displacement is 9.34±2.67mm; The thrust impulse is 22.49±7.11Ns; [2] A three-dimensional spinal motion measurement system was created based on computer stereo vision theory. The maximum deviations of marks in 120×120×210mm³ between measuring value and actual value were 0. 4mm,0. 3mm and 0. 2mm along X,Y and Z axis respectively. [3] In the same condition simulated, The ANOVA indicates that statistical differences (P<0.05) existed among different levels. [4] During lifting, the largest lifting force had effect on the displacement of each section (P<0.05), while the time of the manipulation had no effect (P>0.05); Both of them had no interaction on the displacement (P>0.05). [5] During the manipulation, the movements of the masks are similar on the transverse processes and the articular processes on which the largest displacements occurred at C₃,C4 or C5(mostly at C4).However, on the spinous processes, the largest displacements of the masks occurred at C2 or C3, except the angular displacements on the sagittal plane which occurred at C4.Conclusion: [1] The characteristics of force during manipulation (include preload, peak force and thrust force) were paralleled between the left side operation and the right; [2] The pulsed-wave mode dynamic photogrammetry system has been applied to the analysis of the cervical spine motions during rotatory lifting technic and has achieved excellent results. [3] The rotatory lifting technic is safe and can make each cervical vertebra move, whose preloading traction force and largest lifting force should be 150N and time should be 70～150ms. [4] During the manipulation, each cervical vertebra moved, but there were differences among different levels. The largest displacements mainly concentrated in C3～C5, especially in C4.