2022, Vol. 26 ›› Issue (35): 5577-5582

Mechanical characteristics of stepping lumbus of fixed-point at lateral decubitus position under different pushing modes collected using multi-point membrane pressure test system

Liu Peina1, Li Yuanming2, Fan Zhiyong2   

Abstract: BACKGROUND: There is a lack of analysis on the mechanical characteristics of the stepping lumbus of fixed-point at lateral decubitus position, and there is no relevant research on the fast-pushing method and the slow-pushing method.
OBJECTIVE: To conduct a digital analysis on the similarities and differences of various mechanical parameters of the stepping lumbus of fixed-point at lateral decubitus position under different pushing methods.  
METHODS: A total of 40 patients with lumbar intervertebral disc herniation who were treated in the Department of Massage of Dade Road General Hospital of Guangdong Provincial Hospital of Chinese Medicine in June 2020 were selected and randomly divided into fast-pushing and slow-pushing groups (n=20). The manual trajectory and related mechanical parameters of the operator using the stepping lumbus of fixed-point at lateral decubitus position under two pushing modes were collected and compared through the multi-point membrane pressure test system. The visual analogue scale scores of the two groups were analyzed before and after treatment.
RESULTS AND CONCLUSION: (1) There were preload force, run-up phase and impact phase in both pushing methods. Preload force, valley value, peak value, pushing speed, and impulse were larger in the fast-pushing group than those in the slow-pushing group (P < 0.05). Duration and impact time were not significantly different between the two groups (P > 0.05). (2) The visual analogue scale scores of the two groups were lower after treatment than those before treatment (P < 0.05). Above score was lower in the fast-pushing group than that in the slow-pushing group (P < 0.05). (3) Pearson and Spearman correlation analysis showed that there was a significant correlation between the visual analogue score difference before and after treatment, and the magnitude of preload force and peak value (i.e. impact force) (r=0.536, P < 0.001; r=0.740, P < 0.001). (4) The low back pain symptoms of patients with lumbar intervertebral disc herniation were significantly improved after a single treatment of the two pushing methods. The analgesic effect of fast-pushing group was better than that of slow-pushing group. The visual analogue score difference before and after treatment was correlated with the magnitude of preload force and peak value.
Key words: manipulation, stepping lumbus, fast-pushing, slow-pushing, preload force, impact force, parameters, lumbar disc protrusion