Clinical Outcomes of Microendoscopic Discectomy for Extraforaminal Lumbar Disc Herniation

  • Kazuhiro Maio
  • Munehito Yoshida
Conference paper


The microendoscopic discectomy (MED) system for lumbar disc herniation has been developed in recent years. We applied the MED system to the treatment of extraforaminal lumbar disc herniation. The purpose of this Chapter is to present the clinical results of the MED system for cases of extraforaminal lumbar disc herniation. We performed operations using the MED system on eight patients suffering from extraforaminal lumbar disc herniation. The mean age was 57.4 years. Herniation affected discs at the L2-3 (one patient), L3-4 (one patient), L4-5 (two patients), and L5-S1 (four patients) levels. We recorded the operation time, blood loss, and time until the resumption of walking, and used the Japanese Orthopaedic Association (JOA) score for low back pain in evaluating the clinical results. The mean operation time was 90.1 min. The mean blood loss was 12.3g. All patients began to walk within 6 h postoperatively. The mean JOA score improved from a preoperative 8.2 to a postoperative 25.8. There were no complications. The MED system allows treatment of extraforaminal lumbar disc herniation with good visualization, less pain, and early return to daily activity. Our results showed that the MED system is beneficial in the treatment of extraforaminal lumbar disc herniation.

Key words

Microendoscopy Discectomy Extraforaminal Lumbar spine Disc herniation 


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Copyright information

© Springer-Verlag Tokyo 2005

Authors and Affiliations

  • Kazuhiro Maio
    • 1
  • Munehito Yoshida
    • 2
  1. 1.Sumiya Orthopedic HospitalWakayamaJapan
  2. 2.Department of Orthopaedic SurgeryWakayama Medical UniversityWakayamaJapan

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