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Pholprajug P, Kotheeranurak V, Liu Y, Kim JS. The Endoscopic Lumbar Interbody Fusion: A Narrative Review, and Future Perspective. Neurospine 2023; 20:1224-1245. [PMID: 38171291 PMCID: PMC10762387 DOI: 10.14245/ns.2346888.444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2023] [Revised: 09/21/2023] [Accepted: 10/10/2023] [Indexed: 01/05/2024] Open
Abstract
Lumbar interbody fusion stands as a preferred surgical solution for degenerative lumbar spine diseases. The procedure primarily aims to establish lumbar segment stability, directly addressing patient symptoms associated with spinal complications. Traditional open surgery, though effective, is linked with notable morbidities and extended recovery time. To mitigate these concerns, minimally invasive surgery (MIS) has garnered significant popularity, presenting an appealing alternative with numerous benefits such as reduced soft tissue trauma, decreased blood loss, and expedited recovery. Among MIS procedures, full endoscopic spinal surgery, characterized by its minimal invasiveness, holds the potential to further minimize morbidities while enhancing surgical outcomes. Endoscopic lumbar interbody fusion, a novel procedure within this paradigm, has gained attention for offering advantages comparable to those of minimally invasive transforaminal lumbar interbody fusion. However, the safety, efficacy, and associated surgical techniques and instrument design of this method continue to be subjects of ongoing debate. This paper critically reviews current evidence on the safety, efficacy, and advantages of endoscopic lumbar spinal interbody fusion, examining whether it could indeed supersede existing mainstream techniques.
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Affiliation(s)
| | - Vit Kotheeranurak
- Department of Orthopaedics, Faculty of Medicine, Chulalongkorn University, and King Chulalongkorn Memorial Hospital, Bangkok, Thailand
| | - Yanting Liu
- Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Jin-Sung Kim
- Spine Center, Department of Neurosurgery, Seoul St. Mary’s Hospital, College of Medicine, The Catholic University of Korea, Seoul, Korea
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Wang N, Xie Y, Liu X, Zheng Y, Xi Z, Xu W, Deng R, Tang T, Liu X. Safety and clinical efficacy of endoscopic procedures for the treatment of adjacent segmental disease after lumbar fusion: A systematic review and meta-analysis. PLoS One 2023; 18:e0280135. [PMID: 36745653 PMCID: PMC9901788 DOI: 10.1371/journal.pone.0280135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Accepted: 12/20/2022] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Adjacent segment disease (ASD) is a common complication after lumbar fusion and is still traditionally treated by open surgery. In recent years, with the development of minimally invasive techniques, percutaneous endoscopic surgery(PES) has been used for the treatment of ASD after lumbar fusion due to its unique benefits. Nevertheless, it remains unclear about its significant clinical efficacy and advantages over conventional open surgery. OBJECTIVES To evaluate the clinical efficacy and safety of PES in the treatment of ASD after lumbar fusion. STUDY DESIGN A systematic review and meta-analysis studies about the role of PES in managing ASD after lumbar fusion. METHODS A systematic search review was conducted in PubMed, EMBASE, Cochrane Library, Web of Science, CNKI, VIP, WanFang, and SinoMed databases from the start of their construction to 15 November 2021. Eligible studies included references to clinical trials of PES for ASD after open lumbar fusion. Observations included pain relief, recovery of postoperative function, overall excellent rates, and indicators of the advantages of minimally invasive surgery compared to conventional surgery. Postoperative complications and recurrence rates were also recorded. RESULTS A total of 24 studies, including 20 single-arm studies and 4 clinical control studies, all involving 928 patients were included. A total of 694 patients were included in the single-arm analysis. The results of the single-arm meta-analysis showed that PES could significantly reduce low back and leg pain and improve the functional status of the lumbar spine in patients with ASD after open lumbar fusion compared to preoperatively, and had good clinical efficacy after surgery. A total of 234 patients were included in the four clinically controlled studies, and the results of the meta-analysis showed that PES could clearly reduce pain and improve lumbar function, with no significant difference in efficacy between PES and open surgery. However, PES has a lower surgical incision, less intraoperative bleeding, and shorter operative time and length of hospital stay compared to open surgery. Moreover, it has a lower rate of postoperative recurrence as well as complications and a longer duration of efficacy. CONCLUSIONS On the basis of the available clinical literature and the results of this study, PES could achieve satisfactory clinical effects in ASD treatment after lumbar fusion. Compared with conventional open surgery, PES can not only obtain similar clinical results, but also had the advantages of less trauma and faster recovery. Nevertheless, a randomized controlled study is still needed to validate the findings of this study. TRIAL REGISTRATION Systematic review registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42022298387.
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Affiliation(s)
- Nan Wang
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Yimin Xie
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Xiyu Liu
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Yawei Zheng
- Department of Cardiovascular Medicine, Jiangsu Provincial Hospital of Traditional Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Zhipeng Xi
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Wenqiang Xu
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Rongrong Deng
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
| | - Tian Tang
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
- * E-mail: (TT); (XL)
| | - Xin Liu
- Department of Spine Surgery, Affiliated Hospital of Integrated Traditional Chinese and Western Medicine for Nanjing University of Chinese Medicine, Nanjing, Jiangsu Province, P.R. China
- * E-mail: (TT); (XL)
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Wu PH, Kim HS, Grasso G, An JW, Kim M, Lee I, Park JS, Lee JH, Kang S, Lee J, Yi Y, Lee JH, Park JH, Lim JH, Jang IT. Remodeling of Epidural Fluid Hematoma after Uniportal Lumbar Endoscopic Unilateral Laminotomy with Bilateral Decompression: Comparative Clinical and Radiological Outcomes with a Minimum Follow-up of 2 Years. Asian Spine J 2023; 17:118-129. [PMID: 35785910 PMCID: PMC9977969 DOI: 10.31616/asj.2021.0366] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2021] [Accepted: 01/23/2022] [Indexed: 11/23/2022] Open
Abstract
STUDY DESIGN Retrospective cohort study. PURPOSE To evaluate the clinical and radiological effects of epidural fluid hematoma in the medium term after lumbar endoscopic decompression. OVERVIEW OF LITERATURE There is limited literature comparing the effect of postoperative epidural fluid hematoma after uniportal endoscopic decompression. METHODS Magnetic resonance imaging (MRI) and clinical evaluation were performed for patients with single-level uniportal endoscopic lumbar decompression with a minimum follow-up of 2 years. RESULTS A total of 126 patients were recruited with a minimum follow-up of 26 months. The incidence of epidural fluid hematoma was 27%. Postoperative MRI revealed a significant improvement in the postoperative dura sac area at postoperative day 1 and at the upper endplate at 6 months in the hematoma cohort (39.69±15.72 and 26.89±16.58 mm2) as compared with the nonhematoma cohort (48.92±21.36 and 35.1±20.44 mm2), respectively (p <0.05); and at the lower endplate on postoperative 1 day in the hematoma cohort (51.18±24.69 mm2) compared to the nonhematoma cohort (63.91±27.92 mm2) (p <0.05). No significant difference was observed in the dura sac area at postoperative 1 year in both cohorts. The hematoma cohort had statistically significant higher postoperative 1-week Visual Analog Scale (VAS; 3.32±0.68) pain and Oswestry Disability Index (ODI; 32.65±5.56) scores than the nonhematoma cohort (2.99±0.50 and 30.02±4.84, respectively; p <0.05). No significant difference was found at the final follow-up VAS, ODI, and MRI dura sac area. CONCLUSIONS Epidural fluid hematoma is a common early postoperative MRI finding in lumbar endoscopic unilateral laminotomy with bilateral decompression. Conservative management is the preferred treatment option for patients who do not have a neurological deficit. Symptoms last only a few days and are self-limiting. A common endpoint is a remodeled fluid hematoma and the subsequent expansion of the dura sac area.
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Affiliation(s)
- Pang Hung Wu
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea,Department of Orthopaedic Surgery, Juronghealth Campus, National University Health System,
Singapore
| | | | - Giovanni Grasso
- Neurosurgical Clinic, Department of Biomedicine, Neurosciences and Advanced Diagnostics University for Palermo, Palermo,
Italy
| | - Jin Woo An
- Nanoori Spine and Joint Clinic with Saudi German Hospital in Dubai, Dubai,
United Arab Emirates
| | - Myeonghun Kim
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
| | - Inkyung Lee
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
| | | | | | - Sangsoo Kang
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
| | - Jeongshik Lee
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
| | - Yeonjin Yi
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
| | - Jun Hyung Lee
- Department of Internal Medicine, Chosun University College of Medicine, Gwangju,
Korea
| | - Jun Hwan Park
- Faculty of Medicine, University of Debrecen, Debrecen,
Hungary
| | - Jae Hyeon Lim
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
| | - Il-Tae Jang
- Spine Surgery, Nanoori Gangnam Hospital, Seoul,
Korea
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Zhang C, Chen D, Gu Y, Wang T, Wang C. Effects of LncRNA GAS5/miR-137 general anesthesia on cognitive function by TCF4 inflammatory bodies in patients undergoing lumbar spinal canal decompression. Medicine (Baltimore) 2022; 101:e31880. [PMID: 36626439 PMCID: PMC9750600 DOI: 10.1097/md.0000000000031880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023] Open
Abstract
Lumbar spinal stenosis is a common orthopedic disease in clinical practice at present. Postoperative cognitive dysfunction (POCD) refers to the phenomenon of impaired memory. However, whether long noncoding RNA (LncRNA) GAS5 contributes to the mechanism of cognitive function in undergoing lumbar spinal canal decompression remains unknown. Thus, the present study investigated the precise details of LncRNA GAS5 involvement in Postoperative cognitive dysfunction of patients undergoing lumbar spinal canal decompression. Patients undergoing lumbar spinal canal decompression with cognitive function and Normal healthy volunteers were obtained. C57BL/6 mice were maintained with a 2% concentration of sevoflurane in 100% oxygen at a flow rate of 2 L minute-1 for 4 hours. LncRNA GAS5 gene expression were up-regulated in patients undergoing lumbar spinal canal decompression. In mice model, LncRNA GAS5 gene expression also increased. LncRNA GAS5 promoted neuroinflammation in vitro model. LncRNA GAS5 raised cognitive impairment and increased neuroinflammation in mice model. LncRNA GAS5 suppressed miR-137 in vitro model. MiR-137 reduced neuroinflammation in vitro model. MiR-137 suppressed TCF4 protein expression in vitro model. Transcription factor TCF4 activates the expression of bHLH. Taking together, this experiment provide the first experimental and clinical evidence that LncRNA GAS5/miR-137 promoted anesthesia-induced cognitive function to increase inflammatory bodies in patients undergoing lumbar spinal canal decompression, suggesting it may be a biomarker of POCD and a potential therapeutic target for POCD.
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Affiliation(s)
- Chunli Zhang
- Department of Anesthesiology, the Second Affiliated Hospital of Hainan Medical College, Haikou, Hainan, China
| | - Dingzhong Chen
- Department of Chiropractic Surgery, The Second Affiliated Hospital of Hainan Medical College, Haikou, Hainan, China
- * Correspondence: Dingzhong Chen, Department of Chiropractic Surgery, The Second Affiliated Hospital of Hainan Medical College, No.48 Baishuitang Road, Longhua District, Haikou City, Hainan Province 570311, China (e-mail: )
| | - Yuntao Gu
- Department of Chiropractic Surgery, The Second Affiliated Hospital of Hainan Medical College, Haikou, Hainan, China
| | - Tao Wang
- Department of Anesthesiology, the Second Affiliated Hospital of Hainan Medical College, Haikou, Hainan, China
| | - Cong Wang
- Department of Anesthesiology, the Second Affiliated Hospital of Hainan Medical College, Haikou, Hainan, China
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Kim HS, Wu PH, Grasso G, An JW, Kim M, Lee I, Park JS, Lee JH, Kang S, Lee J, Yi Y, Lee JH, Park JH, Lim JH, Jang IT. Remodeling Pattern of Spinal Canal after Full Endoscopic Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression: One Year Repetitive MRI and Clinical Follow-Up Evaluation. Diagnostics (Basel) 2022; 12. [PMID: 35453844 DOI: 10.3390/diagnostics12040793] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 03/18/2022] [Accepted: 03/20/2022] [Indexed: 12/10/2022] Open
Abstract
Objective: There is limited literature on repetitive postoperative MRI and clinical evaluation after Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression. Methods: Clinical visual analog scale, Oswestry Disability Index, McNab’s criteria evaluation and MRI evaluation of the axial cut spinal canal area of the upper end plate, mid disc and lower end plate were performed for patients who underwent single-level Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression. From the evaluation of the axial cut MRI, four types of patterns of remodeling were identified: type A: continuous expanded spinal canal, type B: restenosis with delayed expansion, type C: progressive expansion and type D: restenosis. Result: A total of 126 patients with single-level Uniportal Lumbar Endoscopic Unilateral Laminotomy for Bilateral Decompression were recruited with a minimum follow-up of 26 months. Thirty-six type A, fifty type B, thirty type C and ten type D patterns of spinal canal remodeling were observed. All four types of patterns of remodeling had statistically significant improvement in VAS at final follow-up compared to the preoperative state with type A (5.59 ± 1.58), B (5.58 ± 1.71), C (5.58 ± 1.71) and D (5.27 ± 1.68), p < 0.05. ODI was significantly improved at final follow-up with type A (49.19 ± 10.51), B (50.00 ± 11.29), C (45.60 ± 10.58) and D (45.60 ± 10.58), p < 0.05. A significant MRI axial cut increment of the spinal canal area was found at the upper endplate at postoperative day one and one year with type A (39.16 ± 22.73; 28.00 ± 42.57) mm2, B (47.42 ± 18.77; 42.38 ± 19.29) mm2, C (51.45 ± 18.16; 49.49 ± 18.41) mm2 and D (49.10 ± 23.05; 38.18 ± 18.94) mm2, respectively, p < 0.05. Similar significant increment was found at the mid-disc at postoperative day one, 6 months and one year with type A (55.16 ± 27.51; 37.23 ± 25.88; 44.86 ± 25.73) mm2, B (72.83 ± 23.87; 49.79 ± 21.93; 62.94 ± 24.43) mm2, C (66.85 ± 34.48; 54.92 ± 30.70; 64.33 ± 31.82) mm2 and D (71.65 ± 16.87; 41.55 ± 12.92; 49.83 ± 13.31) mm2 and the lower endplate at postoperative day one and one year with type A (49.89 ± 34.50; 41.04 ± 28.56) mm2, B (63.63 ± 23.70; 54.72 ± 24.29) mm2, C (58.50 ± 24.27; 55.32 ± 22.49) mm2 and D (81.43 ± 16.81; 58.40 ± 18.05) mm2 at postoperative day one and one year, respectively, p < 0.05. Conclusions: After full endoscopic lumbar decompression, despite achieving sufficient decompression immediately postoperatively, varying severity of asymptomatic restenosis was found in postoperative six months MRI without clinical significance. Further remodeling with a varying degree of increment of the spinal canal area occurs at postoperative one year with overall good clinical outcomes.
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Bajaj J, Yadav YR. History of Endoscopic Spine Surgery in India. Indian Journal of Neurosurgery 2022. [DOI: 10.1055/s-0041-1730872] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
AbstractEndoscopic spine surgeries provide distinct advantages and is therefore a viable alternative to open or microscopic techniques. Indian surgeons have shown their expertise from craniovertebral junction to lumbosacral spine with these techniques. Many novel approaches like endoscopic transcervical, partial corpectomy, and others have been designed, and many technological innovations for these surgeries have been made. With different training programs attracting both native and international surgeons, the future of endoscopic spine surgery is bright.
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Affiliation(s)
- Jitin Bajaj
- Department of Neurosurgery, NSCB Medical College, Jabalpur, Madhya Pradesh, India
| | - Yad Ram Yadav
- Department of Neurosurgery, NSCB Medical College, Jabalpur, Madhya Pradesh, India
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Du C, Wu T, Mao T, Jia F, Hai B, Zhu B, Liu X. From clinic to hypothesis, an innovative operation for the treatment of lumbar spinal stenosis in a minimal invasive way. Med Hypotheses 2020; 144:110007. [PMID: 32592920 DOI: 10.1016/j.mehy.2020.110007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 06/12/2020] [Accepted: 06/16/2020] [Indexed: 11/18/2022]
Abstract
Concerning the damage to back muscles and posterior ligament complex (PLC) by posterior open approach for lumbar spinal stenosis (LSS), the oblique lateral intervertebral fusion (OLIF) is pretty popular nowadays. However, oblique lateral approach has obvious drawbacks, which are limited vision and operative scope for achieving spinal canal decompression. Herein, we present a hypothesis that lumbar canal decompression can be well achieved by OLIF combined with spinal endoscope operative system. Nerval decompression and spinal reconstruction are achieved in a minimal invasive way, which may play an instructive role for the treatment of serious LSS.
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Affiliation(s)
- Chuanchao Du
- Department of Orthopaedic, Peking University Third Hospital, Beijing, PR China
| | - Tao Wu
- Orthopaedic Department, Heze Municipal Hospital, Heze, Shandong, PR China
| | - Tianli Mao
- Department of Orthopaedic, Peking University Third Hospital, Beijing, PR China
| | - Fei Jia
- Department of Orthopaedic, Peking University Third Hospital, Beijing, PR China
| | - Bao Hai
- Department of Orthopaedic, Peking University Third Hospital, Beijing, PR China
| | - Bin Zhu
- Pain Medicine Center, Peking University Third Hospital, Beijing, PR China
| | - Xiaoguang Liu
- Department of Orthopaedic, Peking University Third Hospital, Beijing, PR China; Pain Medicine Center, Peking University Third Hospital, Beijing, PR China.
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Khalsa SS, Kim HS, Singh R, Kashlan ON. Radiographic outcomes of endoscopic decompression for lumbar spinal stenosis. Neurosurg Focus 2019; 46:E10. [DOI: 10.3171/2019.2.focus18617] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Accepted: 02/26/2019] [Indexed: 11/06/2022]
Abstract
OBJECTIVELumbar central stenosis can theoretically be decompressed with minimal bone removal via an endoscopic approach. Although multiple studies have demonstrated an adequate radiographic decompression, none has quantified the volume of bone removal after endoscopic decompression. The objective of this study was to quantify the 3D volume of bone removed from the lamina and facet joints during endoscopic decompression for lumbar central and lateral recess stenosis.METHODSThis retrospective study included adults with lumbar spinal stenosis who underwent endoscopic decompression of a single level or 2 noncontiguous lumbar levels. Central stenosis on MRI was graded preoperatively and postoperatively using the Schizas scale. A computer program was developed in MATLAB to semiautomatically perform a 3D volumetric analysis of preoperative and postoperative lumbar CT scans. The volumetric percentage of bone removed from the lamina and facet joints ipsilateral and contralateral to the side of approach was quantified.RESULTSNineteen patients with 21 treated lumbar levels were included in the study. Preoperatively, the number of levels with Schizas stenosis grades B, C, and D were 5, 12, and 4, respectively. Stenosis grades improved postoperatively to grades A, B, C, and D for 17, 3, 1, and 0 levels, respectively. All levels improved by at least 1 stenosis grade. The volumetric percentage of laminar bone removed was 15.5% (95% CI 11.2%–19.8%, p < 0.001) from the ipsilateral lamina and 8.8% (95% CI 5.7%–11.8%, p < 0.001) from the contralateral lamina. The percentage of facet joint resection was 5.3% (95% CI 4.2%–6.4%, p < 0.001) and 4.3% (95% CI 2.2%–6.4%, p < 0.001) for the ipsilateral and contralateral facet joints, respectively. Average pain scores, as measured by the visual analog scale, improved from 7.9 preoperatively to 2.2 by 3–10 months postoperatively (p < 0.001).CONCLUSIONSEndoscopic lumbar decompression achieves improvement in the radiographic grade of lumbar central stenosis with minimal bone removal from the lamina and facet joints. Future prospective studies are needed to validate the findings of this study with more comprehensive clinical outcomes.
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Affiliation(s)
- Siri Sahib Khalsa
- 1Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan; and
| | - Hyeun Sung Kim
- 2Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, Republic of Korea
| | - Ravindra Singh
- 2Department of Neurosurgery, Nanoori Gangnam Hospital, Seoul, Republic of Korea
| | - Osama Nezar Kashlan
- 1Department of Neurosurgery, University of Michigan, Ann Arbor, Michigan; and
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