title: Posterior endoscopic lumbar discectomy using a thoracoport as a tubular retractor.
abstract: OBJECTIVE
  To make lumbar discectomy simple and feasible, we developed an endoscopic surgical technique that uses a Thoracoport as a tubular retractor.
  
  
  METHODS
  The patient was placed in a 60-degree forwardly inclined lateral position with the side of the lesion on the top. After radiological confirmation of the index level, a Thoracoport was inserted through a 2-cm paramedian transverse skin incision. A 0-degree rod lens endoscope was mounted to a scope holder and placed into the retractor for magnification and illumination. Laminotomy was performed with a high-speed drill to reach the insertion of the yellow ligament to the upper lamina. A 2-mm undercutting of the upper facet was performed with a punch to expose the lateral edge of the nerve root. Surgical instruments were inserted next to the endoscope for manipulation. The herniated disc was identified and removed with pituitary rongeurs as in a standard microdiscectomy. With this technique, a sufficient amount of bone is resected to expose the disc lateral to the nerve root; hemostasis is easily achieved and the incidence of nerve root injury is reduced.
  
  
  CONCLUSIONS
  We have successfully performed an endoscopic lumbar discectomy in 20 patients by using a Thoracoport as a tubular retractor. No specially designed instruments were required. This technique was a safe and effective minimally invasive approach to treating lumbar disc disease according to our preliminary experience.
authors.affiliation: Department of Neurosurgery, China Medical University Hospital, 7F-5 No. 55 Chung-Tai East Road, Taichung, Taiwan, Republic of China. andrewhsieh@giga.net.tw
authors.forename: P-C
authors.initials: PC
authors.lastname: Hsieh
authors.forename: C H
authors.initials: CH
authors.lastname: Wang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D017586:Diskectomy / Q000295:instrumentation*; D004724:Endoscopy; D005240:Feasibility Studies; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007405:Intervertebral Disc Displacement / Q000601:surgery*; D008159:Lumbar Vertebrae / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D012189:Retrospective Studies