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Mean values of visual analog scale scores for back pain, leg pain, and Oswestry Disability Index results in the local anesthesia group
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Figure 3: Mean values of visual analog scale scores for back pain, leg pain, and Oswestry Disability Index results in the local anesthesia group

Mentions: Overall, the recurrence rate was 4% in the GA group and 2.7% in the LA group. The failure rate was 2% in the GA group with none in the LA group. The success rate of surgery was 94% in the GA group and 97.3% in the LA group. The mean preoperative VAS score for back pain was 57.65 (range, 0-100) and for leg pain was 75.88 (range, 10–100), and the mean preoperative ODI was 48.49 (range, 14–84). At 12 months after surgery, the mean VAS for back pain was 10.54 (range, 0–20), the mean VAS for leg pain was 11.11 (range, 0–30), and mean ODI was 9.13 (range, 0–22) [Figures 3–5]. There was constant and significant improvement in back pain, leg pain, and daily activities in both the groups after surgery (P < 0.05). There were no statistically significant differences in VAS or ODI scores between the LA and GA groups. The mean operative time in the LA group was 67.07 min (range, 25–140), and in the GA group was 74.78 min (range, 50–130), but this difference was not statistically significant. The mean hospital stay in the LA group was 2.96 days (range, 2–5), which was significantly shorter (P < 0.05) than 3.83 days (range, 3–5) in the GA group.

Endoscopic discectomy of L5-S1 disc herniation via an interlaminar approach: Prospective controlled study under local and general anesthesia

Chen HT, Tsai CH, Chao SC, Kao TH, Chen YJ, Hsu HC, Shen CC, Tsou HK - Surg Neurol Int (2011)

Bottom Line: Results were compared to evaluate the technique feasibility, safety, and efficacy under LA and GA.VAS scores for back pain and leg pain and ODI revealed statistically significant improvement when they were compared with preoperative values.GA and LA are both effective for this procedure.

Affiliation: Department of Orthopaedic Surgery, China Medical University Hospital, School of Chinese Medicine, China Medical University, Taichung 40447, Republic of China.

ABSTRACT

Background: Open discectomy remains the standard method for treatment of lumbar disc herniation, but can traumatize spinal structure and leaves symptomatic epidural scarring in more than 10% of cases. The usual transforaminal approach may be associated with difficulty reaching the epidural space due to anatomical peculiarities at the L5-S1 level. The endoscopic interlaminar approach can provide a direct pathway for decompression of disc herniation at the L5-S1 level. This study aimed to evaluate the clinical results of endoscopic interlaminar lumbar discectomy at the L5-S1 level and compare the technique feasibility, safety, and efficacy under local and general anesthesia (LA and GA, respectively).

Methods: One hundred twenty-three patients with L5-S1 disc herniation underwent endoscopic interlaminar lumbar discectomy from October 2006 to June 2009 by two spine surgeons using different anesthesia preferences in two medical centers. Visual analog scale (VAS) scores for back pain and leg pain and Oswestry Disability Index (ODI) sores were recorded preoperatively, and at 3, 6, and 12 months postoperatively. Results were compared to evaluate the technique feasibility, safety, and efficacy under LA and GA.

Results: VAS scores for back pain and leg pain and ODI revealed statistically significant improvement when they were compared with preoperative values. Mean hospital stay was statistically shorter in the LA group. Complications included one case of dural tear with rootlet injury and three cases of recurrence within 1 month who subsequently required open surgery or endoscopic interlaminar lumbar discectomy. There were no medical or infectious complications in either group.

Conclusion: Disc herniation at the L5-S1 level can be adequately treated endoscopically with an interlaminar approach. GA and LA are both effective for this procedure. However, LA is better than GA in our opinion.

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