• Med. Sci. Monit. · Jun 2020

    Percutaneous Endoscopic Lumbar Discectomy (PELD) via a Transforaminal and Interlaminar Combined Approach for Very Highly Migrated Lumbar Disc Herniation (LDH) Between L4/5 and L5/S1 Level.

    • Yongzhao Zhao, Yunshan Fan, Liuzhi Yang, Haijian Ni, Chuanfeng Wang, Shisheng He, and Guangfei Gu.
    • Department of Orthopedics, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China (mainland).
    • Med. Sci. Monit. 2020 Jun 7; 26: e922777.

    AbstractBACKGROUND Percutaneous endoscopic lumbar discectomy (PELD) has become one of the most popular minimally invasive surgeries for lumbar disc herniation (LDH), however, very highly migrated LDH is still a tricky issue for PELD. This study reported a new endoscopic discectomy strategy for the treatment of very highly migrated LDH between the L4/5 and L5/S1 level. MATERIAL AND METHODS The current study retrospectively analyzed 12 patients who accepted PELD for very highly migrated LDH between the L4/5 and L5/S1 level. Under local anesthesia, the transforaminal approach was chosen for the L4/5 level and the interlaminar approach was chosen for the L5/S1 level. The 10-point visual analogue scale (VAS) was used to assess back pain (VAS-Back) and leg pain (VAS-Leg). Oswestry disability index (ODI) and Modified Mac Nab Criteria were adopted as the functional evaluation methods. All patients were followed in the outpatient department for at least 12 months after their operation. RESULTS Our study showed that very highly migrated disc between L4/5 and L5/S1 level could be removed completely by this strategy. Except for 1 case of postoperative dysesthesia and 1 case of dural tear, no severe complication occurred. At the last follow-up, the average VAS-Back score of the study patients was reduced from 5.17±2.12 to 2.08±1.08 (P<0.05) and the average VAS-Leg score was reduced from 7.25±1.48 to 1.33±0.89 (P<0.05). The average ODI scores improved from 48.50±10.59 to 13.00±2.76 (P<0.05). According to the Modified Mac Nab Criteria, 83.33% of patients (10 out of 12 patients) received an excellent or good recovery and no poor result was reported. No recurrence was observed during follow up. CONCLUSIONS PELD via a transforaminal and interlaminar combined approach provides an alternative option for select patients with very highly migrated LDH between the L4/5 and L5/S1 level.

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