| Objective:(1)the key mechanical and kinematic parameters in the treatment of lumbar disc herniation with fixed-point rotation manipulation were collected by using the mechanical measurement instrument of traditional Chinese medicine and the dynamic capture system to provide the data reference for the next basic research;(2)the key parameters were quantified and analyzed,the characteristics of manipulation were summarized,and the mechanism of treatment of lumbar disc herniation with fixed-point rotation manipulation was discussed.It provides an objective theoretical basis for the treatment of lumbar disc herniation.Methods:(1)hands of manual operator with pressure sensor mounted mechanical measuring gloves,collect the relevant mechanical parameters during operation:(including: thumb maximum push force(kg),pre-load force(kg),pull(kg),Maximum force(kg);(2)using a dynamic capture system,the signal locator is placed on the patient's spine surface,and then the capture lens captures the dynamic changes of the spine during the manipulation at a capture speed of 50 frames / s through the locator.Specific measurement parameters: lumbar anterior flexion angle(°),lateral flexion angle(°),rotation angle difference before and after rotation(°),average wrenching time(ms),maximum acceleration(m °2).Results:(1)the mechanical parameters of 30 patients with lumbar disc herniation were collected by manual mechanical instrument.The mean valueof left and right hand operation was 8.88 ±1.29 kg,the maximum pull force of thumb was 8.88 ±1.29 kg,and the mean value of manipulation of left and right hand was 8.88 ±1.29 kg.The preloading force was 4.24 ±1.06 Kg,the maximum force was 9.13 ±1.68 Kg,the maximum force was 15.2 ±2.39 Kg,and there was no significant difference between the left and right hands(P >0.05).Pearson correlation analysis showed that there was a strong positive correlation between preloading force and wrench force(r = 0.679,P < 0.05),and there was a moderate positive correlation between wrench force and maximum force(r = 0.301,P < 0.05),and there was a significant positive correlation between preloading force(r = 0.679,P < 0.05)and maximum force(r = 0.301,P < 0.05).(2)the kinematic parameters of 5 patients with lumbar disc herniation were collected by dynamic capture system.The mean values of left and right hand operation were 20.19 ±5.57 °for anterior flexion and 42.45 ±7.26 °for lateral flexion.The rotation angle is 48.78 ±8.33 °,the rotation angle difference is 9.56 ±2.94 °,the average wrench time is 874.07±93.18 Ms,and the maximum acceleration is 409.37 ±159.42m/s 2.Conclusion: 1.The fixed point rotation technique of lumbar spine is a technical operation which requires the operator's hands to work together,in which the pull force and the pull force of the thumb are carried out synchronously in the process of operation.2.There was no significant difference in the mechanical parameters of fixed-point rotation manipulation between left and right hands in the same operation.3."Rotary impact force" is a key step in the successful operation of this technique;4.The greater the preloading force,the greater the spinner force,and the more likely the force will reach the peak value;5.the greater the pre-loading force,the greater the spinner force will be generated.The fixed-point rotation technique of lumbarspine has the kinematic characteristics of "fast rotation impact speed,small amplitude and follow-up";6.All test data were measured in vivo in patients with L4-5 disc herniation,and were operated by the same doctor,so the test results were closer to clinical practice.It has some guiding value to the later related basic research. |
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