retractor for use in posterior lumbar interbody fusion

摘要

PURPOSE: The present invention allows simultaneous anterior lumbar fusion and posterior lumbar fusion in one dorsal operation, especially during the removal of intervertebral disc and surrounding cartilage disc or insertion of magnetic pelvis and artificial disc. It is an object of the present invention to provide a retractor for posterior lumbar fusion that protects nerve tissues such as.;Composition: This retractor for lumbar vertebral fusion has a polygonal pyramid-shaped handle 3 having a large diameter portion and a small diameter portion, and a proximal end portion and a distal portion which are fastened to the small diameter portion of the handle and facing in opposite directions, and are bent twice. The crank 5, which is connected to a constant moment arm length of the proximal end and the distal end, and one side of the crank 5 is formed in an open structure to insert a magnetic pelvic bone or an artificial disk between the lumbar bodies. It consists of a cage guide 7 for guiding and observing, and a catching portion 9 that is bent to the open opposite side at the tip of the cage guide 7 to protect the dural and neuromuscular tissues.;EFFECT: The present invention can safely and easily perform anterior lumbar fusion for fusion of the anterior lumbar vertebral body and posterior lumbar fusion for fusion of posterior bones with a single operation. It facilitates handling for protection, reduces fatigue of the operator even during long-term use, and reduces the retracting manipulation force of the nerve root tissue by the crank having a moment arm length, thereby protecting the nerve root tissue more effectively.