A Biomechanical Study of the Lumbar Intervertebral Disc by Lever Positioning Manipulation

The patient was placed in the prone position, and the doctor used one-finger Zen pushing, rolling, pressing and kneading, flicking and plucking methods in the patient's lumbar region and the affected side of the lower limb pain repeated massage treatment for 15min; the patient was placed in the prone open-mouth position, and the operator stood on the right side of his/her body, so that the whole body of the patient's muscles were relaxed. According to the type of herniation, the patient with paracentral lumbar disc herniation performed unilateral triggering mode, and the patient with central lumbar disc herniation performed bilateral triggering mode.

Sham manipulation treatment was given. Recipients take the prone position, the medical practitioner with a finger Zen push method, rolling method, pressing and kneading method, flicking and plucking method in the patient's lumbar region and the affected side of the lower limbs of the pain in the repeated massage treatment for 15min; patients prone position, with traction rope fixed lumbar disc herniation side of the affected limb, so that the affected limb back to the maximum extent of the extension, and then release the traction rope, simulating the backward extension of the force of the lever positioning manipulation, the medical practitioner does not do any manipulation.

During the unilateral trigger mode operation of the lever positioning manipulation, the operator wears a mechanics sensing glove to collect the mechanics parameters of the manipulation, including: hand preload force, hand trigger maximum force, elbow compression preload force, and elbow compression maximum force. At the same time, a motion capture system was used to collect the kinematic parameters of the lever positioning manipulation, including: loading backward extension angle, loading backward extension trigger angle, average trigger time, maximum speed, and maximum acceleration.

During the bilateral triggering mode operation of the lever positioning manipulation, the operator wore a mechanics sensing glove to collect the mechanics parameters of the manipulation, including: hand preload force, hand triggering maximum force, elbow pressing preload force, and elbow pressing maximum force. At the same time, a motion capture system was used to collect the kinematic parameters of the lever positioning manipulation, including: loading backward extension angle, loading backward extension trigger angle, average trigger time, maximum speed, and maximum acceleration.