Fig. 3From: Roles of multimodal intra-operative neurophysiological monitoring (IONM) in percutaneous endoscopic transforaminal lumbar interbody fusion: a case series of 113 patientsa Bilateral percutaneous pedicle screw instrumentation and the working tube placement; b Lumbar discectomy was performed under endoscopic spinal system; C A cage was implanted via a tail-end expandable tubular system; d Postoperative plain films of lumbar spineBack to article page