The clinical features of, and microendoscopic decompression for, extraforaminal entrapment of the L5 spinal nerve.
OBJECTIVE
To evaluate the clinical results of, and surgical techniques for, microendoscopic (METRx) decompression of extraforaminal entrapment of the L5 spinal nerve at the lumbosacral tunnel.


METHODS
Five patients with extraforaminal entrapment of the L5 spinal nerve in the lumbosacral tunnel were treated in our department, including three men and two women. The average age was 65.6 years. All patients suffered severe leg pain and neurological deficits compatible with L5 radiculopathy. Minimally invasive decompression of the L5 spinal nerve was performed under METRx intertransverse decompression.


RESULTS
With an average follow-up of 17.8 months, clinical results were assessed based on Nakai criteria and Visual Analogue scale (VAS). All patients experienced immediate pain relief postoperatively. Clinical outcomes were excellent in three patients and good in two. The average intraoperative blood loss was 59 ml, with an average operative time of 103 min. Average post-operative stay in bed was 7 days, and average cost was $1860.


CONCLUSIONS
Extraforaminal entrapment of the L5 spinal nerve in the lumbosacral tunnel can cause L5 radiculopathy. METRx partial resection of the L5 transverse processes, sacral ala and osteophytes of L5-S1 vertebral bodies to relieve extraforaminal entrapment of the L5 spinal nerve is a very effective and minimally invasive surgical option.
Department of Orthopaedics, Xinqiao Hospital, The Third Military Medical University, Chongqing, China. happyzhou@vip.163.com
Yue
Y
Zhou
Wen-jie
WJ
Zheng
Jian
J
Wang
Tong-wei
TW
Chu
Chang-qing
CQ
Li
Zheng-feng
ZF
Zhang
Wei-dong
WD
Wang
D000368:Aged; D019299:Decompression, Surgical / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008159:Lumbar Vertebrae; D008297:Male; D008875:Middle Aged; D009408:Nerve Compression Syndromes / Q000209:etiology / Q000601:surgery*; D010147:Pain Measurement; D012189:Retrospective Studies; D013127:Spinal Nerves / Q000601:surgery*; D013130:Spinal Stenosis / Q000150:complications / Q000601:surgery*; D016896:Treatment Outcome