A force applying device for an expandable spinal fusion device

Abstract

The invention provides a force application device for an expandable spinal fusion cage. The device comprises a main shell body (1); one end of the main shell body (1) is provided with a handle (2) and a force application rod (3) extends out from the other end of the main shell body (1); the force application rod (3) comprises a locating rod (31) at the inner layer, a push pipe (32) at the middle layer and a protection pipe (33) at the outer layer; the main shell body (1) is internally provided with a transmission mechanism (4) which can be driven by the handle (2) to drive the push pipe (32) and the protection pipe (33) to move. The force application device for an expandable spinal fusion cage can accurately control the deformation of a fusion cage, enables a fusion cage to deform elastically according to preset heights with high precision, improves operation accuracy greatly, and enables operations to be carried out quickly to relieve pain for patients.

Description

【Technical Field】 [0001] The invention relates to a force applying device for an expandable spinal fusion cage. 【Background technique】 [0002] Lumbar intervertebral disc degenerative disease is a common type of disease that causes low back pain and dysfunction. It is generally manifested as discogenic low back pain, lumbar facet joint disorder or compression of nerves leading to sexually transmitted diseases, and can also cause intervertebral space stenosis. In severe cases, lumbar spine Diseases such as slippage affect the work and life of patients. The current common treatment methods include conservative treatment, minimally invasive surgery and surgical treatment, of which lumbar fusion is a reliable treatment method. [0003] The existing force applying device for an expandable spinal fusion cage does not have a positioning rod, and it is difficult to ensure that the pushing tube moves along a straight line, and it is difficult to ensure the accuracy of the fusion cage durin...

AI Technical Summary

Problems solved by technology

[0003] Existing force applying devices for expandable spinal fusion cages do not have positioning rods, making it difficult to ensure the linear movement of the push tube and the accuracy of the fusion cage during deformation

[0004] The existing force applying device for the expandable spinal fusion has no protective tube, and the fusion deforms irregularly during the process of deformation under force, which may cause some outer walls of the fusion to form bulges, and some cannot form bulges, which is difficult to control The amount of deformation of the protrusion of the fusion cage, when the doctor applies it to the patient's spine for surgery, is likely to cause safety hazards

Images