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| Volume 73 Number 5 September 2006 |
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| Comparative Radiologic Evaluation of Percutaneous Endoscopic Lumbar Discectomy and Open Microdiscectomy: A Matched Cohort Analysis | 795-801 |
Sang-Ho Lee, M.D., Ph.D.1, Seung-Eun Chung, M.D.2, Yong Ahn, M.D.1, Tae-Hong Kim, M.D.3, Jee-Young Park, M.D.2, and Song-Woo Shin, Ph.D.1 |
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Departments of 1Neurosurgery and 2Diagnostic Radiology, Wooridul Spine Hospital, Seoul, Korea, and 3Department of Neurosurgery, Sanggye Paik Hospital, Inje University College of Medicine, Seoul, Korea.
Address all correspondence to Yong Ahn, M.D., Department of Neurosurgery, Wooridul Spine Hospital, 47-4 Chungdam-dong, Kangnam-gu, Seoul, Korea 135-100; e -mail: ns-ay@hanmail.net
This work was supported by a grant from the Wooridul Spine Foundation.
Accepted for publication October 2005.
Abstract
Background: Only a few studies comparing percutaneous endoscopic discectomy and open discectomy have been reported in the literature. The purpose of this study was to compare the radiographic changes in patients treated with percutaneous endoscopic lumbar discectomy (PELD) with those of patients treated with open lumbar microdiscectomy (OLM).
Methods: A total of 30 patients who underwent PELD with a minimum three years of follow-up were randomly selected. To compare with the PELD group, 30 patients who underwent OLM during the same period were also randomly selected according to sex, age, and disc level. The clinical outcomes were evaluated by the Macnab criteria. Statistical analysis was performed using independent sample t-test, paired sample t-test, chi-square test, Fisher's exact test, and analysis of variance (ANOVA).
Results: The successful clinical outcomes were 96.7% in the PELD group and 93.3% in the OLM group. Among the various radiological parameters, changes of disc height (1.41 ± 1.19 mm in the PELD group and 2.29 ± 2.12 mm in the OLM group, p=0.024) and foraminal height (1.26 ± 0.91 mm in the PELD group and 1.85 ± 0.92 mm in the OLM group, p=0.017) were significantly different between the two groups.
Conclusions: Although the clinical outcomes were similarly satisfactory in both groups, PELD is a less invasive procedure than open microdiscectomy in s elected cases.
Key Words
Intervertebral disc, herniated nucleus pulposus, lumbar microdiscectomy, minimally invasive surgery, endoscopy.
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