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Suzuki H, Funaba M, Fujimoto K, Ichihara Y, Nishida N, Sakai T. Current Concepts of Cervical Spine Alignment, Sagittal Deformity, and Cervical Spine Surgery. J Clin Med 2024; 13:1196. [PMID: 38592040 PMCID: PMC10932435 DOI: 10.3390/jcm13051196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2024] [Revised: 01/29/2024] [Accepted: 02/17/2024] [Indexed: 04/10/2024] Open
Abstract
There are not many reports on cervical spine alignment, and only a few analyze ideal surgical approaches and optimal amounts of correction needed for the various types of deformity. We comprehensively reviewed the present literature on cervical spinal deformities (with or without myelopathy) and their surgical management to provide a framework for surgical planning. A general assessment of the parameters actually in use and correlations between cervical and thoracolumbar spine alignment are provided. We also analyzed posterior, anterior, and combined cervical surgical approaches and indications for the associated techniques of laminoplasty, laminectomy and fusion, and anterior cervical discectomy and fusion. Finally, on the basis of the NDI, SF-36, VAS, and mJOA questionnaires, we fully evaluated the outcomes and measures of postoperative health-related quality of life. We found the need for additional prospective studies to further enhance our understanding of the importance of cervical alignment when assessing and treating cervical deformities with or without myelopathy. Future studies need to focus on correlations between cervical alignment parameters, disability scores, and myelopathy outcomes. Through this comprehensive literature review, we offer guidance on practical and important points of surgical technique, cervical alignment, and goals surgeons can meet to improve symptoms in all patients.
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Affiliation(s)
- Hidenori Suzuki
- Department of Orthopedics Surgery, Graduate School of Medicine, Yamaguchi University, Yamaguchi 755-8505, Japan; (M.F.); (K.F.); (Y.I.); (N.N.); (T.S.)
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de Dios E, Laesser M, Björkman-Burtscher IM, Lindhagen L, MacDowall A. MRI-based measurements of spondylolisthesis and kyphosis in degenerative cervical myelopathy. BMC Med Imaging 2023; 23:180. [PMID: 37946139 PMCID: PMC10634168 DOI: 10.1186/s12880-023-01151-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Accepted: 11/02/2023] [Indexed: 11/12/2023] Open
Abstract
BACKGROUND To provide normative data and to determine accuracy and reliability of preoperative measurements of spondylolisthesis and kyphosis on supine static magnetic resonance imaging (MRI) of patients with degenerative cervical myelopathy. METHODS T2-weighted midsagittal images of the cervical spine were in 100 cases reviewed twice by one junior observer, with an interval of 3 months, and once by a senior observer. The spondylolisthesis slip (SSlip, mm) and the modified K-line interval (mK-line INT, mm) were assessed for accuracy with the standard error of measurement (SEm) and the minimum detectable change (MDC). Intraobserver and interobserver reliability levels were determined using the intraclass correlation coefficient (ICC). RESULTS The SEm was 0.5 mm (95% CI 0.4-0.6) for spondylolisthesis and 0.6 mm (95% CI 0.5-0.7) for kyphosis. The MDC, i.e., the smallest difference between two examinations that can be detected with statistical certainty, was 1.5 mm (95% CI 1.2-1.8) for spondylolisthesis and 1.6 mm (95% CI 1.3-1.8) for kyphosis. The highest reliability levels were seen between the second observation of the junior examiner and the senior observer (ICC = 0.80 [95% CI 0.70-0.87] and ICC = 0.96 [95% CI 0.94-0.98] for SSlip and mK-line INT, respectively). CONCLUSIONS This study provides normative values of alignment measurements of spondylolisthesis and kyphosis in DCM patients. It further shows the importance of taking measurement errors into account when defining cut-off values for cervical deformity parameters and their potential clinical application in surgical decision-making.
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Affiliation(s)
- Eddie de Dios
- Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden.
- Department of Radiology, Sahlgrenska University Hospital, Region Västra Götaland, Bruna stråket 11, Gothenburg, 41345, Sweden.
| | - Mats Laesser
- Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Radiology, Sahlgrenska University Hospital, Region Västra Götaland, Bruna stråket 11, Gothenburg, 41345, Sweden
| | - Isabella M Björkman-Burtscher
- Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
- Department of Radiology, Sahlgrenska University Hospital, Region Västra Götaland, Bruna stråket 11, Gothenburg, 41345, Sweden
| | - Lars Lindhagen
- Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden
| | - Anna MacDowall
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
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Ye J, Rider SM, Lafage R, Gupta S, Farooqi AS, Protopsaltis TS, Passias PG, Smith JS, Lafage V, Kim HJ, Klineberg EO, Kebaish KM, Scheer JK, Mundis GM, Soroceanu A, Bess S, Ames CP, Shaffrey CI, Gupta MC. Distal junctional kyphosis in adult cervical deformity patients: where does it occur? EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2023; 32:1598-1606. [PMID: 36928488 DOI: 10.1007/s00586-023-07631-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Revised: 01/19/2023] [Accepted: 02/28/2023] [Indexed: 03/18/2023]
Abstract
PURPOSE To evaluate the impact of the lowest instrumented vertebra (LIV) on Distal Junctional kyphosis (DJK) incidence in adult cervical deformity (ACD) surgery. METHODS Prospectively collected data from ACD patients undergoing posterior or anterior-posterior reconstruction at 13 US sites was reviewed up to 2-years postoperatively (n = 140). Data was stratified into five groups by level of LIV: C6-C7, T1-T2, T3-Apex, Apex-T10, and T11-L2. DJK was defined as a kyphotic increase > 10° in Cobb angle from LIV to LIV-1. Analysis included DJK-free survival, covariate-controlled cox regression, and DJK incidence at 1-year follow-up. RESULTS 25/27 cases of DJK developed within 1-year post-op. In patients with a minimum follow-up of 1-year (n = 102), the incidence of DJK by level of LIV was: C6-7 (3/12, 25.00%), T1-T2 (3/29, 10.34%), T3-Apex (7/41, 17.07%), Apex-T10 (8/11, 72.73%), and T11-L2 (4/8, 50.00%) (p < 0.001). DJK incidence was significantly lower in the T1-T2 LIV group (adjusted residual = -2.13), and significantly higher in the Apex-T10 LIV group (adjusted residual = 3.91). In covariate-controlled regression using the T11-L2 LIV group as reference, LIV selected at the T1-T2 level (HR = 0.054, p = 0.008) or T3-Apex level (HR = 0.081, p = 0.010) was associated with significantly lower risk of DJK. However, there was no difference in DJK risk when LIV was selected at the C6-C7 level (HR = 0.239, p = 0.214). CONCLUSION DJK risk is lower when the LIV is at the upper thoracic segment than the lower cervical segment. DJK incidence is highest with LIV level in the lower thoracic or thoracolumbar junction.
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Affiliation(s)
- Jichao Ye
- Department of Orthopaedic Surgery, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, Guangdong Province, China
| | - Sean M Rider
- Department of Orthopaedic Surgery, Washington University School of Medicine, 660 S. Euclid, Campus, Box 8233, St. Louis, MO, 63110, USA
| | - Renaud Lafage
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Sachin Gupta
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | - Ali S Farooqi
- Department of Orthopaedic Surgery, University of Pennsylvania, Philadelphia, PA, USA
| | | | - Peter G Passias
- Department of Orthopaedic Surgery, NYU Langone Orthopedic Hospital, New York, NY, USA
| | - Justin S Smith
- Department of Neurosurgery, University of Virginia Medical Center, Charlottesville, VA, USA
| | - Virginie Lafage
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Han-Jo Kim
- Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, NY, USA
| | - Eric O Klineberg
- Department of Orthopaedic Surgery, University of California, Davis, Sacramento, CA, USA
| | - Khaled M Kebaish
- Department of Orthopaedic Surgery, The Johns Hopkins University, Baltimore, MD, USA
| | - Justin K Scheer
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Gregory M Mundis
- Department of Orthopedic Surgery, Scripps Clinic Torrey Pines, La Jolla, CA, USA
| | - Alex Soroceanu
- University of Calgary Spine Program, University of Calgary, Alberta, Canada
| | - Shay Bess
- Rocky Mountain Hospital for Children, Presbyterian/St Luke's Medical Center, Denver, CO, USA
| | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, CA, USA
| | - Christopher I Shaffrey
- Departments of Neurological Surgery and Orthopedic Surgery, Duke University, Durham, NC, USA
| | - Munish C Gupta
- Department of Orthopaedic Surgery, Washington University School of Medicine, 660 S. Euclid, Campus, Box 8233, St. Louis, MO, 63110, USA.
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Algarni N, Dea N, Evaniew N, McIntosh G, Jacobs BW, Paquet J, Wilson JR, Hall H, Bailey CS, Weber MH, Nataraj A, Attabib N, Rampersaud YR, Cadotte DW, Stratton A, Christie SD, Fisher CG, Charest-Morin R. Does Ending a Posterior Construct Proximally at C2 Versus C3 Impact Patient Reported Outcomes in Degenerative Cervical Myelopathy Patients up to 24 months After the Surgery? Global Spine J 2023:21925682231166605. [PMID: 36960878 DOI: 10.1177/21925682231166605] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/25/2023] Open
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVES The primary objective was to evaluate the impact of the upper instrumented level (UIV) being at C2 vs C3 in posterior cervical construct on patient reported outcomes (PROs) up to 24 months after surgery for cervical degenerative myelopathy (DCM). Secondary objectives were to compare operative time, intra-operative blood loss (IOBL), length of stay (LOS), adverse events (AEs) and re-operation. METHODOLOGY Patients who underwent a posterior cervical instrumented fusion (3 and + levels) with a C2 or C3 UIV, with 24 months follow-up were analyzed. PROs (NDI, EQ5D, SF-12 PCS/MCS, NRS arm/neck pain) were compared using ANCOVA. Operative duration, IOBL, AEs, and re-operation were compared. Subgroup analysis was performed on patient presenting with pre-operative malalignment (cervical sagittal vertical axis ≥40 mm and/or T1slope- cervical lordosis >15°). RESULTS 173 patients were included, of which 41 (24%) had a C2 UIV and 132 (76%) a C3 UIV. There was no statistically significant difference between the groups for the changes in PROs up to 24 months. Subgroup analysis of patients with pre-operative malalignment showed a trend towards greater improvement in the NDI at 12 months with a C2 UIV (P = .054). Operative time, IOBL and peri-operative AEs were more in C2 group (P < .05). There was no significant difference in LOS and re-operation (P > .05). CONCLUSION In this observational study, up to 24 months after surgery for posterior cervical fusion in DCM greater than 3 levels, PROs appear to evolve similarly.
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Affiliation(s)
- Nizar Algarni
- Department of Orthopedic Surgery, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Nicolas Dea
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedics Surgery, University of British Columbia, Vancouver BC, Canada
| | - Nathan Evaniew
- Combined Neurosurgical and Orthopedic Spine Program, University of Calgary, Calgary, AB, Canada
| | - Greg McIntosh
- Canadian Spine Outcomes and Research Network, Markdale, ON, Canada
| | - Bradley W Jacobs
- Combined Neurosurgical and Orthopedic Spine Program, University of Calgary, Calgary, AB, Canada
| | - Jérome Paquet
- Centre de Recherche CHU de Quebec, CHU de Quebec-Universite Laval, Quebec City, QC, Canada
| | - Jefferson R Wilson
- Divisions of Orthopaedic and Neurosurgery, University of Toronto, Toronto, ON, Canada
| | - Hamilton Hall
- Department of Surgery, University of Toronto, Toronto, ON, Canada
| | - Christopher S Bailey
- Department of Orthopedics Surgery, London Health Science Centre, Western University, London, ON, Canada
| | - Michael H Weber
- Department of Orthopedics Surgery, McGill UniversityHealth Centre, Montreal, QC, Canada
| | - Andrew Nataraj
- Division of Neurosurgery, Department of Surgery, University of AlbertaHospital, Edmonton, AB, Canada
| | - Najmedden Attabib
- Canada East Spine Centre, Division of Neurosurgery, Horizon Health Network, Saint John, NB, Canada
| | | | - David W Cadotte
- Combined Neurosurgical and Orthopedic Spine Program, University of Calgary, Calgary, AB, Canada
| | - Alexandra Stratton
- Department of Orthopedics Surgery, The Ottawa Hospital, Ottawa, ON, Canada
| | - Sean D Christie
- Division of Neurosurgery, Dalhousie University, Halifax, NS, Canada
| | - Charles G Fisher
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedics Surgery, University of British Columbia, Vancouver BC, Canada
| | - Raphaële Charest-Morin
- Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedics Surgery, University of British Columbia, Vancouver BC, Canada
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MacDowall A, Löfgren H, Edström E, Brisby H, Parai C, Elmi-Terander A. Comparison of posterior muscle-preserving selective laminectomy and laminectomy with fusion for treating cervical spondylotic myelopathy: study protocol for a randomized controlled trial. Trials 2023; 24:106. [PMID: 36765352 PMCID: PMC9921403 DOI: 10.1186/s13063-023-07123-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Accepted: 01/28/2023] [Indexed: 02/12/2023] Open
Abstract
BACKGROUND Cervical spondylotic myelopathy (CSM) is the predominant cause of spinal cord dysfunction in the elderly. The patients are often frail and susceptible to complications. Posterior surgical techniques involving non-fusion are complicated by postlaminectomy kyphosis and instrumented fusion techniques by distal junction kyphosis, pseudarthrosis, or implant failure. The optimal surgical approach is still a matter of controversy. Since anterior and posterior fusion techniques have been compared without presenting any superiority, the objective of this study is to compare stand-alone laminectomy with laminectomy and fusion to determine which treatment has the lowest frequency of reoperations. METHODS This is a multicenter randomized, controlled, parallel-group non-inferiority trial. A total of 300 adult patients are allocated in a ratio of 1:1. The primary endpoint is reoperation for any reason at 5 years of follow-up. Sample size and power calculation were performed by estimating the reoperation rate after laminectomy to 3.5% and after laminectomy with fusion to 7.4% based on the data from the Swedish spine registry (Swespine) on patients with CSM. Secondary outcomes are the patient-derived Japanese Orthopaedic Association (P-mJOA) score, Neck Disability Index (NDI), European Quality of Life Five Dimensions (EQ-5D), Numeric Rating Scale (NRS) for neck and arm pain, Hospital Anxiety and Depression Scale (HADS), development of kyphosis measured as the cervical sagittal vertical axis (cSVA), and death. Clinical and radiological follow-up is performed at 3, 12, 24, and 60 months after surgery. The main inclusion criterium is 1-4 levels of CSM in the subaxial spine, C3-C7. The REDcap software will be used for safe data management. Data will be analyzed according to the modified intention to treat (mITT) population, defined as randomized patients who are still alive without having emigrated or left the study after 2 and 5 years. DISCUSSION This will be the first randomized controlled trial comparing two of the most common surgical treatments for CSM: the posterior muscle-preserving selective laminectomy and posterior laminectomy with instrumented fusion. The results of the myelopathy randomized controlled (MyRanC) study will provide surgical treatment recommendations for CSM. This may result in improvements in surgical treatment and clinical practice regarding CSM. TRIAL REGISTRATION ClinicalTrials.gov NCT04936074 . Registered on 23 June 2021.
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Affiliation(s)
- Anna MacDowall
- Department of Surgical Sciences, Uppsala University, Entrance 61, 6th floor, 75185, Uppsala, Sweden.
| | - Håkan Löfgren
- grid.5640.70000 0001 2162 9922Neuro-Orthopedic Center, Jönköping, Jönköping County, and Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden
| | - Erik Edström
- grid.24381.3c0000 0000 9241 5705Department of Neurosurgery, Karolinska University Hospital, Stockholm, Sweden ,grid.4714.60000 0004 1937 0626Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden ,Capio, Spine Center Stockholm, Upplands-Väsby, Sweden
| | - Helena Brisby
- grid.8761.80000 0000 9919 9582Department of Orthopaedics, Institute of Clinical Sciences, University of Gothenburg, Gothenburg, Sweden
| | - Catharina Parai
- grid.8761.80000 0000 9919 9582Department of Orthopaedics, Institute of Clinical Sciences, University of Gothenburg, Gothenburg, Sweden
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Hirayama Y, Mowforth OD, Davies BM, Kotter MRN. Determinants of quality of life in degenerative cervical myelopathy: a systematic review. Br J Neurosurg 2023; 37:71-81. [PMID: 34791981 DOI: 10.1080/02688697.2021.1999390] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
BACKGROUND Degenerative cervical myelopathy (DCM) is the most common cause of chronic, progressive spinal cord impairment worldwide. Patients experience substantial pain, functional neurological decline and disability. Health-related quality of life (HRQoL) appears to be particularly poor, even when compared to other chronic diseases. However, the determinants of HRQoL are poorly understood. The objective was to perform a systematic review of the determinants of quality of life of people with DCM. METHODS A systematic search was conducted in MEDLINE and Embase following PRISMA 2020 guidelines (PROSPERO CRD42018115675). Full-text papers in English, exclusively studying DCM, published before 26 March 2020 were eligible for inclusion and were assessed using the Newcastle-Ottawa Scale and the Cochrane Risk of Bias 2 (RoB 2) tool. Study sample characteristics, patient demographics, cohort type, HRQoL instrument utilised, HRQoL score, and relationships of HRQoL with other variables were qualitatively synthesised. RESULTS A total of 1176 papers were identified; 77 papers and 13,572 patients were included in the final analysis. A total of 96% of papers studied surgical cohorts and 86% utilised the 36-Item Short Form Survey (SF-36) as a measure of HRQoL. HRQoL determinants were grouped into nine themes. The most common determinant to be assessed was surgical technique (38/77, 49%) and patient satisfaction and experience of pain (10/77, 13%). HRQoL appeared to improve after surgery. Pain was a negative predictor of HRQoL. CONCLUSION Current data on the determinants of HRQoL in DCM are limited, contradictory and heterogeneous. Limitations of this systematic review include lack of distinction between DCM subtypes and heterogenous findings amongst the papers in which HRQoL is measured postoperatively or post-diagnosis. This highlights the need for greater standardisation in DCM research to allow further synthesis. Studies of greater precision are necessary to account for HRQoL being complex, multi-factorial and both time and context dependent.
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Affiliation(s)
- Yuri Hirayama
- Division of Neurosurgery, Department of Clinical Neurosciences, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Oliver D Mowforth
- Division of Neurosurgery, Department of Clinical Neurosciences, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Benjamin M Davies
- Division of Neurosurgery, Department of Clinical Neurosciences, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
| | - Mark R N Kotter
- Division of Neurosurgery, Department of Clinical Neurosciences, Addenbrooke's Hospital, University of Cambridge, Cambridge, UK
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de Dios E, Laesser M, Björkman-Burtscher IM, Lindhagen L, MacDowall A. Improvement rates, adverse events and predictors of clinical outcome following surgery for degenerative cervical myelopathy. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2022; 31:3433-3442. [PMID: 36053323 DOI: 10.1007/s00586-022-07359-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2022] [Revised: 07/20/2022] [Accepted: 08/18/2022] [Indexed: 12/14/2022]
Abstract
PURPOSE To investigate improvement rates, adverse events and predictors of clinical outcome after laminectomy alone (LAM) or laminectomy with instrumented fusion (LAM + F) for degenerative cervical myelopathy (DCM). METHODS This is a post hoc analysis of a previously published DCM cohort. Improvement rates for European myelopathy score (EMS) and Neck Disability Index (NDI) at 2- and 5-year follow-ups and adverse events are presented descriptively for available cases. Predictor endpoints were EMS and NDI scores at follow-ups, surgeon- and patient-reported complications, and reoperation-free interval. For predictors, univariate and multivariable models were fitted to imputed data. RESULTS Mean age of patients (LAM n = 412; LAM + F n = 305) was 68 years, and 37.4% were women. LAM + F patients had more severe spondylolisthesis and less severe kyphosis at baseline, more surgeon-reported complications, more patient-reported complications, and more reoperations (p ≤ 0.05). After imputation, the overall EMS improvement rate was 43.8% at 2 years and 36.3% at 5 years. At follow-ups, worse EMS scores were independent predictors of worse EMS outcomes and older age and worse NDI scores were independent predictors of worse NDI outcomes. LAM + F was associated with more surgeon-reported complications (ratio 1.81; 95% CI 1.17-2.80; p = 0.008). More operated levels were associated with more patient-reported complications (ratio 1.12; 95% CI 1.02-1.22; p = 0.012) and a shorter reoperation-free interval (hazard ratio 1.30; 95% CI 1.08-1.58; p = 0.046). CONCLUSIONS These findings suggest that surgical intervention at an earlier myelopathy stage might be beneficial and that less invasive procedures are preferable in this patient population.
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Affiliation(s)
- Eddie de Dios
- Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg and Region Västra Götaland, Sahlgrenska University Hospital, Bruna stråket 11, 41345, Gothenburg, Sweden.
| | - Mats Laesser
- Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg and Region Västra Götaland, Sahlgrenska University Hospital, Bruna stråket 11, 41345, Gothenburg, Sweden
| | - Isabella M Björkman-Burtscher
- Department of Radiology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg and Region Västra Götaland, Sahlgrenska University Hospital, Bruna stråket 11, 41345, Gothenburg, Sweden
| | - Lars Lindhagen
- Uppsala Clinical Research Center, Uppsala University, Uppsala, Sweden
| | - Anna MacDowall
- Department of Surgical Sciences, Uppsala University, Uppsala, Sweden
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Louie PK, Sheikh Alshabab B, McCarthy MH, Virk S, Dowdell JE, Steinhaus ME, Lovecchio F, Samuel AM, Morse KW, Schwab FJ, Albert TJ, Qureshi SA, Iyer S, Katsuura Y, Huang RC, Cunningham ME, Yao YC, Weissmann K, Lafage R, Lafage V, Kim HJ. Classification system for cervical spine deformity morphology: a validation study. J Neurosurg Spine 2022; 37:865-873. [PMID: 35901688 DOI: 10.3171/2022.5.spine211537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Accepted: 05/16/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE The objective of this study was to initially validate a recent morphological classification of cervical spine deformity pathology. METHODS The records of 10 patients for each of the 3 classification subgroups (flat neck, focal deformity, and cervicothoracic), as well as for 8 patients with coronal deformity only, were extracted from a prospective multicenter database of patients with cervical deformity (CD). A panel of 15 physicians of various training and professional levels (i.e., residents, fellows, and surgeons) categorized each patient into one of the 4 groups. The Fleiss kappa coefficient was utilized to evaluate intra- and interrater reliability. Accuracy, defined as properly selecting the main driver of deformity, was reported overall, by morphotype, and by reviewer experience. RESULTS The overall classification demonstrated a moderate to substantial agreement (round 1: interrater Fleiss kappa = 0.563, 95% CI 0.559-0.568; round 2: interrater Fleiss kappa = 0.612, 95% CI 0.606-0.619). Stratification by level of training demonstrated similar mean interrater coefficients (residents 0.547, fellows 0.600, surgeons 0.524). The mean intrarater score was 0.686 (range 0.531-0.823). A substantial agreement between rounds 1 and 2 was demonstrated in 81.8% of the raters, with a kappa score > 0.61. Stratification by level of training demonstrated similar mean intrarater coefficients (residents 0.715, fellows 0.640, surgeons 0.682). Of 570 possible questions, reviewers provided 419 correct answers (73.5%). When considering the true answer as being selected by at least one of the two main drivers of deformity, the overall accuracy increased to 86.0%. CONCLUSIONS This initial validation of a CD morphological classification system reiterates the importance of dynamic plain radiographs for the evaluation of patients with CD. The overall reliability of this CD morphological classification has been demonstrated. The overall accuracy of the classification system was not impacted by rater experience, demonstrating its simplicity.
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Affiliation(s)
- Philip K Louie
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,2Department of Neurosurgery, Center for Neurosciences and Spine, Virginia Mason Franciscan Health, Seattle, Washington
| | - Basel Sheikh Alshabab
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Michael H McCarthy
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,3Department of Orthopaedic Surgery, Indiana Spine Group, University of Indiana, Carmel, Indiana
| | - Sohrab Virk
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,4Department of Orthopaedic Surgery, Northwell Health, New Hyde Park, New York
| | - James E Dowdell
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Michael E Steinhaus
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,5Spine Institute, MountainStar Healthcare, Murray, Utah
| | - Francis Lovecchio
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Andre M Samuel
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Kyle W Morse
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Frank J Schwab
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,4Department of Orthopaedic Surgery, Northwell Health, New Hyde Park, New York
| | - Todd J Albert
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Sheeraz A Qureshi
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Sravisht Iyer
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Yoshihiro Katsuura
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,6Department of Orthopedics, Adventist Health, Willits, California
| | - Russel C Huang
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Matthew E Cunningham
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
| | - Yu-Cheng Yao
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,7Department of Orthopedics, Taipei Veterans General Hospital, Taipei, Taiwan; and
| | - Karen Weissmann
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,8Department of Orthopedics and Traumatology, University of Chile, Santiago, Chile
| | - Renaud Lafage
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,4Department of Orthopaedic Surgery, Northwell Health, New Hyde Park, New York
| | - Virginie Lafage
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York.,4Department of Orthopaedic Surgery, Northwell Health, New Hyde Park, New York
| | - Han Jo Kim
- 1Department of Orthopaedic Surgery, Hospital for Special Surgery, New York, New York
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9
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Kitamura K, de Dios E, Bodon G, Barany L, MacDowall A. Evaluating a paradigm shift from anterior decompression and fusion to muscle-preserving selective laminectomy: a single-center study of degenerative cervical myelopathy. J Neurosurg Spine 2022; 37:740-748. [PMID: 35901775 DOI: 10.3171/2022.4.spine211562] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Accepted: 04/15/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE Muscle-preserving selective laminectomy (SL) is an alternative to conventional decompression surgery in patients with degenerative cervical myelopathy (DCM). It is less invasive, preserves the extensor musculature, and maintains the range of motion of the cervical spine. Therefore, the preferred treatment for DCM at the authors' institution has changed from anterior decompression and fusion (ADF), including anterior cervical discectomy and fusion (ACDF) and anterior cervical corpectomy and fusion (ACCF), toward SL. The aim of this study was to evaluate surgical outcomes before and after this paradigm shift with patient-reported outcome measures (PROMs), complications, reoperations, and cost-effectiveness. METHODS This study was a retrospective register-based cohort study. All patients with DCM who underwent ADF or SL at the authors' institution from 2008 to 2019 were reviewed. Using ANCOVA, changes in PROMs from baseline to the 2-year follow-up were compared between the two groups, adjusting for clinicodemographic parameters, baseline PROMs, number of decompressed levels, and MRI measurements (C2-7 Cobb angle, C2-7 sagittal vertical axis [SVA], and modified K-line interval [mK-line INT]). The PROMs, including the European Myelopathy Score (EMS), the Neck Disability Index (NDI), and the EQ-5D, were collected from the national Swedish Spine Register. Complications, reoperations, and in-hospital treatment costs were also compared between the two groups. RESULTS Ninety patients (mean age 60.7 years, 51 men [57%]) were included in the ADF group and 63 patients (mean age 68.8 years, 41 men [65%]) in the SL group. The ADF and SL groups had similar PROMs at baseline. The preoperative MR images showed similar C2-7 Cobb angles (10.7° [ADF] vs 14.1° [SL], p = 0.12) and mK-line INTs (4.08 vs 4.88 mm, p = 0.07), but different C2-7 SVA values (16.2 vs 19.3 mm, p = 0.04). The comparison of ANCOVA-adjusted mean changes in PROMs from baseline to the 2-year follow-up presented no significant differences between the groups (EMS, p = 0.901; NDI, p = 0.639; EQ-5D, p = 0.378; and EQ-5D health, p = 0.418). The overall complication rate was twice as high in the ADF group (22.2% vs 9.5%, p = 0.049), while the reoperation rate was comparable (16.7% vs 7.9%, p = 0.146). The average in-hospital treatment cost per patient was $6617 (USD) for SL, $7046 for ACDF, and $12,000 for ACCF. CONCLUSIONS SL provides similar PROMs after 2 years, a significantly lower complication rate, and better cost-effectiveness compared with ADF.
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Affiliation(s)
- Kazuya Kitamura
- 1Department of Orthopaedic Surgery, National Defense Medical College, Saitama, Japan
- 2Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- 3Department of Surgical Sciences, Uppsala University Hospital, Uppsala, Sweden
| | - Eddie de Dios
- 3Department of Surgical Sciences, Uppsala University Hospital, Uppsala, Sweden
| | - Gergely Bodon
- 4Department of Orthopaedic and Trauma Surgery, Klinikum Esslingen, Esslingen am Neckar, Germany; and
| | - Laszlo Barany
- 5Department of Neurosurgery, University of Erlangen, Erlangen, Germany
| | - Anna MacDowall
- 3Department of Surgical Sciences, Uppsala University Hospital, Uppsala, Sweden
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10
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Charest-Morin R, Bailey CS, McIntosh G, Rampersaud YR, Jacobs WB, Cadotte DW, Paquet J, Hall H, Weber MH, Johnson MG, Nataraj A, Attabib N, Manson N, Phan P, Christie SD, Thomas KC, Fisher CG, Dea N. Does extending a posterior cervical fusion construct into the upper thoracic spine impact patient-reported outcomes as long as 2 years after surgery in patients with degenerative cervical myelopathy? J Neurosurg Spine 2022; 37:547-555. [PMID: 35523250 DOI: 10.3171/2022.3.spine211529] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/21/2022] [Indexed: 11/06/2022]
Abstract
OBJECTIVE In multilevel posterior cervical instrumented fusion, extension of fusion across the cervicothoracic junction (CTJ) at T1 or T2 has been associated with decreased rates of reoperation and pseudarthrosis but with longer surgical time and increased blood loss. The impact on patient-reported outcomes (PROs) remains unclear. The primary objective was to determine whether extension of fusion through the CTJ influenced PROs at 3, 12, and 24 months after surgery. The secondary objective was to compare the number of patients who reached the minimal clinically important differences (MCIDs) for the PROs, modified Japanese Orthopaedic Association (mJOA) score, operative time, intraoperative blood loss, length of stay, discharge disposition, adverse events (AEs), reoperation within 24 months of surgery, and patient satisfaction. METHODS This was a retrospective observational cohort study of prospectively collected multicenter data of patients with degenerative cervical myelopathy. Patients who underwent posterior instrumented fusion of 4 levels or greater (between C2 and T2) between January 2015 and October 2020 and received 24 months of follow-up were included. PROs (scores on the Neck Disability Index [NDI], EQ-5D, physical component summary and mental component summary of SF-12, and numeric rating scale for arm and neck pain) and mJOA scores were compared using ANCOVA and adjusted for baseline differences. Patient demographic characteristics, comorbidities, and surgical details were abstracted. The proportions of patients who reached the MCIDs for these outcomes were compared with the chi-square test. Operative duration, intraoperative blood loss, AEs, reoperation, discharge disposition, length of stay, and satisfaction was compared by using the chi-square test for categorical variables and the independent-samples t-test for continuous variables. RESULTS A total of 198 patients were included in this study (101 patients with fusion not crossing the CTJ and 97 with fusion crossing the CTJ). Patients with a construct extending through the CTJ were more likely to be female and have worse baseline NDI scores (p > 0.05). When adjusted for baseline differences, there were no statistically significant differences between the two groups in terms of the PROs and mJOA scores at 3, 12, and 24 months. Surgical duration was longer (p < 0.001) and intraoperative blood loss was greater in the group with fusion extending to the upper thoracic spine (p = 0.013). There were no significant differences between groups in terms of AEs (p > 0.05). Fusion with a construct crossing the CTJ was associated with reoperation (p = 0.04). Satisfaction with surgery was not significantly different between groups. The proportions of patients who reached the MCIDs for the PROs were not statistically different at any time point. CONCLUSIONS There were no statistically significant differences in PROs between patients with a posterior construct extending to the upper thoracic spine and those without such extension for as long as 24 months after surgery. The AE profiles were not significantly different, but longer surgical time and increased blood loss were associated with constructs extending across the CTJ.
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Affiliation(s)
- Raphaële Charest-Morin
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedics Surgery, University of British Columbia, Vancouver, British Columbia
| | - Christopher S Bailey
- 2Department of Orthopedics Surgery, London Health Science Centre, Western University, London, Ontario
| | - Greg McIntosh
- 3Canadian Spine Outcomes and Research Network, Markdale, Ontario
| | - Y Raja Rampersaud
- 4Divisions of Orthopaedic Surgery and Neurosurgery, University of Toronto, Ontario
| | - W Bradley Jacobs
- 5Combined Neurosurgical and Orthopedic Spine Program, University of Calgary, Alberta
| | - David W Cadotte
- 5Combined Neurosurgical and Orthopedic Spine Program, University of Calgary, Alberta
| | - Jérome Paquet
- 6Centre de Recherche CHU de Quebec, CHU de Québec-Université Laval, Quebec City, Quebec
| | - Hamilton Hall
- 7Department of Surgery, University of Toronto, Ontario
| | - Michael H Weber
- 8Department of Orthopedics Surgery, McGill University Health Centre, Montreal, Quebec
| | - Michael G Johnson
- 9Department of Surgery, Section of Orthopedics and Neurosurgery, University of Manitoba, Winnipeg, Manitoba
| | - Andrew Nataraj
- 10Division of Neurosurgery, Department of Surgery, University of Alberta Hospital, Edmonton, Alberta
| | - Najmedden Attabib
- 11Canada East Spine Centre, Division of Neurosurgery, Zone 2, Horizon Health Network, Saint John, New Brunswick
| | - Neil Manson
- 12Canada East Spine Centre, Saint John Orthopedics, Dalhousie Medicine New Brunswick, Saint John Campus, Saint John, New Brunswick
| | - Philippe Phan
- 13Department of Orthopedics Surgery, The Ottawa Hospital, Ottawa, Ontario; and
| | - Sean D Christie
- 14Division of Neurosurgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Kenneth C Thomas
- 5Combined Neurosurgical and Orthopedic Spine Program, University of Calgary, Alberta
| | - Charles G Fisher
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedics Surgery, University of British Columbia, Vancouver, British Columbia
| | - Nicolas Dea
- 1Combined Neurosurgical and Orthopedic Spine Program, Department of Orthopedics Surgery, University of British Columbia, Vancouver, British Columbia
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11
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Karamian BA, Mao JZ, Viola A, Ju DG, Canseco JA, Toci GR, Bowles DR, Reiter DM, Semenza NC, Woods BI, Lee JK, Hilibrand AS, Kaye ID, Kepler CK, Vaccaro AR, Schroeder GD. Patients With Preoperative Cervical Deformity Experience Similar Clinical Outcomes to Those Without Deformity Following 1-3 Level Anterior Cervical Decompression and Fusion. Clin Spine Surg 2022; 35:E466-E472. [PMID: 34923501 DOI: 10.1097/bsd.0000000000001291] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2021] [Accepted: 11/17/2021] [Indexed: 11/25/2022]
Abstract
STUDY DESIGN Retrospective cohort study. OBJECTIVE The aim was to compare the outcomes of patients with incompletely corrected cervical deformity against those without deformity following short-segment anterior cervical decompression and fusion for clinically significant radiculopathy or myelopathy. SUMMARY OF BACKGROUND DATA Cervical deformity has increasingly been recognized as a driver of disability and has been linked to worse patient-reported outcomes measures (PROMs) after surgery. METHODS Patients 18 years or above who underwent 1-3 level anterior cervical decompression and fusion to address radiculopathy and/or myelopathy at a single institution between 2014 and 2018 with at least 1 year of PROMs were reviewed. Patients were categorized based on cervical deformity into 2 groups: sagittal vertebral axis (cSVA) ≥40 mm as the deformity group, and cSVA <40 mm as the nondeformity group. Patient demographics, surgical parameters, preoperative and postoperative radiographs, and minimum 1-year PROMs were compared. RESULTS Of the 230 patients, 191 (83%) were in the nondeformity group and 39 (17%) in the deformity group. Patients with deformity were more likely to be male (69.2% vs. 40.3%, P<0.001) and have a greater body mass index (32.8 vs. 29.7, P=0.028). The deformity group had significantly greater postoperative cSVA (44.2 vs. 25.1 mm, P<0.001) but also had significantly greater ∆cSVA (-4.87 vs. 0.25 mm, P=0.007) than the nondeformity group. Both groups had significant improvements in visual analog scale arm, visual analog scale neck, Short-Form 12 Physical Component Score, and neck disability index (NDI) (P<0.001). However, the deformity group experienced significantly greater ∆NDI and ∆mental component score (MCS)-12 scores (-19.45 vs. -11.11, P=0.027 and 7.68 vs. 1.32, P=0.009). CONCLUSIONS Patients with preoperative cervical sagittal deformity experienced relatively greater improvements in NDI and MCS-12 scores than those without preoperative deformity. These results suggest that complete correction of sagittal alignment is not required for patients to achieve significant clinical improvement. LEVEL OF EVIDENCE III.
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Affiliation(s)
| | - Jennifer Z Mao
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | - Anthony Viola
- Philadelphia College of Osteopathic Medicine, Philadelphia, PA
| | - Derek G Ju
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | - Jose A Canseco
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | - Gregory R Toci
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | - Daniel R Bowles
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | - David M Reiter
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | | | - Barrett I Woods
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | - Joseph K Lee
- Rothman Orthopaedic Institute at Thomas Jefferson University
| | | | - I David Kaye
- Rothman Orthopaedic Institute at Thomas Jefferson University
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12
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Evaniew N, Charest-Morin R, Jacobs WB, Johnson M, Bailey CS, Christie S, Paquet J, Nataraj A, Cadotte DW, Wilson JR, Craig M, Xu M, Manson N, Hall H, Thomas KC, Rampersaud YR, McIntosh G, Fisher CG, Dea N. Cervical Sagittal Alignment in Patients with Cervical Spondylotic Myelopathy: An Observational Study From the Canadian Spine Outcomes and Research Network. Spine (Phila Pa 1976) 2022; 47:E177-E186. [PMID: 34845179 DOI: 10.1097/brs.0000000000004296] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Prospective cohort study. OBJECTIVE Among patients with CSM, we aimed to evaluate the extent to which: (1) Preoperative cervical sagittal alignment is associated with health-related quality of life, function, and symptoms; (2) Surgery leads to changes in cervical sagittal alignment; and (3) Postoperative cervical sagittal alignment is associated with health-related quality of life, function, and symptoms at 12 months of follow-up. SUMMARY OF BACKGROUND DATA The importance of maintaining or improving cervical sagittal alignment in the surgical management of patients with CSM has not been established. METHODS We measured C2-C7 Cobb angle, T1 slope, and C2-C7 cervical sagittal vertical axis (cSVA). We tested for associations with Neck Disability Index, Pain Scales for neck and arm pain, EuroQol 5D, Short Form 12 Physical and Mental Component Summaries, and modified Japanese Orthopaedic Association scores. We adjusted for potential confounders using multiple linear regression, and we performed various prespecified subgroup (cSVA > 40 mm, surgical approach) and sensitivity analyses. RESULTS Among 250 patients, adjusted analyses yielded significant inverse associations prior to surgery between each of cSVA and T1 slope with SF12 Physical Component Summaries (T1 slope: -0.14, 95% CI -0.26 to -0.01, P = 0.03; C2-C7 cSVA: -0.13, 95% CI --0.21 to -0.05 P < 0.01). Surgery was associated with a small but statistically significant increase in cSVA across the cohort (+5.8 mm [SD 11.7], P < 0.01) but no change in Cobb angle or T1 slope. At 12-months after surgery, there were no significant associations between alignment parameters or change in alignment and any measures of health-related quality of life, function, or symptoms. Results were consistent across subgroup and sensitivity analyses. CONCLUSION Increased cSVA and T1 slope were associated with inferior health-related quality of life at presentation among patients with CSM, but no significant associations were observed following surgical treatment.Level of Evidence: 3.
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Affiliation(s)
- Nathan Evaniew
- University of Calgary Spine Program, University of Calgary, Calgary, Alberta, Canada
- McCaig Institute for Bone and Joint Health, University of Calgary, Calgary, Alberta, Canada
| | - Raphaële Charest-Morin
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - W Bradley Jacobs
- University of Calgary Spine Program, University of Calgary, Calgary, Alberta, Canada
| | - Michael Johnson
- Department of Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
| | | | - Sean Christie
- Division of Neurosurgery, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Jérôme Paquet
- Department of Orthopaedics, Centre Hospitalier Universitaire de Quebec, Quebec, Quebec, Canada
| | - Andrew Nataraj
- Division of Neurosurgery, University of Alberta, Edmonton, Alberta, Canada
| | - David W Cadotte
- University of Calgary Spine Program, University of Calgary, Calgary, Alberta, Canada
- Hotchkiss Brain Institute and Departments of Clinical Neurosciences and Radiology, Division of Neurosurgery, Cumming School of Medicine, University of Calgary
| | | | - Michael Craig
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Mark Xu
- Department of Surgery, University of Manitoba, Winnipeg, Manitoba, Canada
| | - Neil Manson
- Canada East Spine Centre, Saint John Regional Hospital, Saint John, New Brunswick, Canada
| | - Hamilton Hall
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | - Ken C Thomas
- University of Calgary Spine Program, University of Calgary, Calgary, Alberta, Canada
| | - Y Raja Rampersaud
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada
| | | | - Charles G Fisher
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
| | - Nicolas Dea
- Combined Neurosurgery and Orthopaedic Spine Program, University of British Columbia, Vancouver, British Columbia, Canada
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13
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MacDowall A, Barany L, Bodon G. Surgical treatment outcome on a national cohort of 176 patients with cervical manifestation of rheumatoid arthritis. JOURNAL OF CRANIOVERTEBRAL JUNCTION AND SPINE 2021; 12:248-256. [PMID: 34728991 PMCID: PMC8501822 DOI: 10.4103/jcvjs.jcvjs_200_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Accepted: 01/17/2021] [Indexed: 11/24/2022] Open
Abstract
Purpose: Rheumatoid arthritis (RA) affecting the cervical spine results in instability and deformity that can be divided into the subtypes C1–C2 horizontal (atlantoaxial instability), C0–C2 vertical (basilar invagination), subaxial, and combined instabilities. The aim of this study was to compare the surgical treatments and outcomes of RA-related deformity and instability in a population-based setting. Patients and Methods: All patients with RA in the national Swespine register from January 1, 2006, to March 20, 2019, were assessed. Baseline characteristics, surgical treatments, European Myelopathy Scale (EMS), Neck Disability Index, the Visual Analog Scale for neck and arm pain as well as pre- and postoperative imaging were analyzed. The follow-up time points were at 1-, 2-, and 5 years after surgery. Results: A total of 176 patients were included. There were 62 (35%) patients with C1–C2 horizontal instability, 48 (27%) with C0–C2 vertical instability, 19 (11%) patients with subaxial instability, 43 (24%) patients with combined instability, and 4 patients without instability served as controls. The EMS improved in the C1–C2 horizontal instability group after fusion surgery (Δ =2.6 p) but remained within baseline confidence intervals in the other groups. All patients regardless of instability improved in pain. The subaxial instability had the highest risk of death within 5 years after surgery (11/19, 58%). The most dangerous complications due to implant failure were seen in patients instrumented with laminar hooks. Conclusion: The neurological outcome after fusion surgery is poor and the death rate is high in patients with cervical RA-related instability and deformity.
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Affiliation(s)
- Anna MacDowall
- Department of Surgical Sciences, Uppsala University Hospital, Uppsala, Sweden
| | - Laszlo Barany
- Department of Neurosurgery, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Gergely Bodon
- Department of Anatomy, Laboratory for Applied and Clinical Anatomy, Histology and Embryology, Semmelweis University Budapest, Hungary, Europe.,Department of Orthopaedic Surgery, Klinikum Esslingen, Esslingen am Neckar, Germany
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14
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Passias PG, Pierce KE, Kummer N, Krol O, Passfall L, Janjua MB, Sciubba D, Ahmad W, Naessig S, Diebo B. Impact of Myelopathy Severity and Degree of Deformity on Postoperative Outcomes in Cervical Spinal Deformity Patients. Neurospine 2021; 18:628-634. [PMID: 34610694 PMCID: PMC8497248 DOI: 10.14245/ns.2040456.228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Accepted: 04/27/2021] [Indexed: 12/01/2022] Open
Abstract
Objective Malalignment of the cervical spine can result in cord compression, leading to a myelopathy diagnosis. Whether deformity or myelopathy severity is stronger predictors of surgical outcomes is understudied.
Methods Surgical cervical deformity (CD) patients with baseline (BL) and up to 1-year data were included. Modified Japanese Orthopaedic Association (mJOA) score categorized BL myelopathy (mJOA = 18 excluded), with moderate myelopathy mJOA being 12 to 17 and severe myelopathy being less than 12. BL deformity severity was categorized using the mismatch between T1 slope and cervical lordosis (TS-CL), with CL being the angle between the lower endplates of C2 and C7. Moderate deformity was TS-CL less than or equal to 25° and severe deformity was greater than 25°. Categorizations were combined into 4 groups: group 1 (G1), severe myelopathy and severe deformity; group 2 (G2), severe myelopathy and moderate deformity; group 3 (G3), moderate myelopathy and moderate deformity; group 4 (G4), moderate myelopathy and severe deformity. Univariate analyses determined whether myelopathy or deformity had greater impact on outcomes.
Results One hundred twenty-eight CD patients were included (mean age, 56.5 years; 46% female; body mass index, 30.4 kg/m2) with a BL mJOA score of 12.8±2.7 and mean TS-CL of 25.9°±16.1°. G1 consisted of 11.1% of our CD population, with 21% in G2, 34.6% in G3, and 33.3% in G4. At BL, Neck Disability Index (NDI) was greatest in G2 (p=0.011). G4 had the lowest EuroQol-5D (EQ-5D) (p<0.001). Neurologic exam factors were greater in severe myelopathy (p<0.050). At 1-year, severe deformity met minimum clinically important differences (MCIDs) for NDI more than moderate deformity (p=0.002). G2 had significantly worse outcomes compared to G4 by 1-year NDI (p=0.004), EQ-5D (p=0.028), Numerical Rating Scale neck (p=0.046), and MCID for NDI (p=0.001).
Conclusion Addressing severe deformity had increased clinical weight in improving patient-reported outcomes compared to addressing severe myelopathy.
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Affiliation(s)
- Peter G Passias
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Katherine E Pierce
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Nicholas Kummer
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Oscar Krol
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Lara Passfall
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | | | - Daniel Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Waleed Ahmad
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Sara Naessig
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Bassel Diebo
- Department of Orthopedics, SUNY Downstate, Brooklyn, NY, USA
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15
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Passias PG, Pierce KE, Imbo B, Krol O, Passfall L, Tretiakov P, Moattari K, Williamson T, Joujon-Roche R, Passano B, Ahmad W, Naessig S, Diebo B. What are the major drivers of outcomes in cervical deformity surgery? JOURNAL OF CRANIOVERTEBRAL JUNCTION AND SPINE 2021; 12:401-405. [PMID: 35068823 PMCID: PMC8740818 DOI: 10.4103/jcvjs.jcvjs_106_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2021] [Accepted: 11/06/2021] [Indexed: 11/10/2022] Open
Abstract
Background Context: Cervical deformity (CD) correction is becoming more challenging and complex. Understanding the factors that drive optimal outcomes has been understudied in CD corrective surgery. Purpose: The purpose of the study was to weight baseline (BL) factors on impact upon outcomes following CD surgery. Study Design Setting: This was a retrospective review of a single-center database. Patient Sample: The sample size of the study was 61 cervical patients. Outcome Measures: Two outcomes were measured: “Improved outcome (IO)”: (1) radiographic improvement: “nondeformed” Schwab pelvic tilt (PT)/sagittal vertical axis (SVA) and Ames cervical sagittal vertical axis (cSVA)/T1 Slope – cervical lordosis (TSCL); (2) clinical: MCID Euro-QOL 5 Dimension (EQ5D), Neck Disability Index (NDI), or improvement in modified Japanese Orthopedic Association (mJOA) scale modifier; and (3) complications/reoperation: no reoperation or major complications and “poor outcome” (PO): (1) radiographic deterioration: “moderate” or “severely” deformed Schwab SVA/PT and Ames cSVA/TS-CL; (2) clinical: not meeting MCID EQ5D and NDI worsening in mJOA modifier; and (3) complications/reoperation: reoperation or complications. Materials and Methods: CD patients included full BL and 1-year (1Y) radiographic measures and Health related quality of life (HRQLs) questionnaires. Patients who underwent a reoperation for infection were excluded. Patients were categorized by IO, PO, or not. Random forest assessed ratios of predictors for IO and PO. Categorical regression models predicted how BL regional deformity (Ames cSVA, TS-CL, and horizontal gaze), BL global deformity (Schwab PI-LL, SVA, and PT), regional/global change (BL to 1Y), BL disability (mJOA score), and BL pain/function impact outcomes. Results: Sixty-one patients were included in the study (55.8 years, 54.1% of females). Surgical approach included 18.3% anterior, 51.7% posterior, and 30% combined. The average number of levels fused for the cohort was 7.7. Mean operative time was 823 min, and estimated blood loss (EBL): 1037ccs. At 1Y, 24.6% had an IO and 9.8% had PO. Random forest analysis showed the top five individual factors associated with an IO: BL maximum kyphosis, maximum lordosis, C0–C2, L4 pelvic angle, and NSR back pain (80% radiographic, 20% clinical). Categorical IO regression model (R2 = 0.328, P = 0.007) showed low BL regional deformity (β = ‒0.082), low BL global deformity (β = ‒0.099), global improvement (β = ‒0.532), regional improvement (β = ‒0.230), low BL disability (β = ‒0.100), and low BL NDI (β = ‒0.024). Random forest demonstrated the top five individual BL factors associated with PO, 80% were radiographic: BL CL apex, DJK angle, cervical lordosis, T1 slope, and NSR neck pain. Categorical PO regression model (R2 = 0.306, P = 0.012) showed high BL regional deformity (β = ‒0.108), high BL global deformity (β = ‒0.255), global decline (β = ‒0.272), regional decline (β = 0.443), BL disability (β = −‒0.164), BL and severe NDI (>69) (β = ‒0.181). Conclusions: Categorical weight demonstrated radiographic as the strongest predictor of both improved (global alignment) and PO (regional deformity/deterioration). Radiographic factors carry the most weight in determining an improved or PO, and can be ultimately utilized in preoperative planning and surgical decision-making to optimize outcomes.
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Affiliation(s)
- Peter Gust Passias
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Katherine E Pierce
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Bailey Imbo
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Oscar Krol
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Lara Passfall
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Peter Tretiakov
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Kevin Moattari
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Tyler Williamson
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Rachel Joujon-Roche
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Brandon Passano
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Waleed Ahmad
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Sara Naessig
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, NY, USA
| | - Bassel Diebo
- Department of Orthopedics, SUNY Downstate, New York, NY, USA
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16
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Passias PG, Pierce KE, Passano B, Tariq MB, Ahmad S, Singh V, Owusu-Sarpong S, Krol O, Imbo B, Passfall L, Tretiakov P, Williamson T, Joujon-Roche R, Ahmad W, Naessig S, Diebo B. What are the major drivers of outcomes in cervical deformity surgery? JOURNAL OF CRANIOVERTEBRAL JUNCTION AND SPINE 2021; 12:376-380. [PMID: 35068819 PMCID: PMC8740812 DOI: 10.4103/jcvjs.jcvjs_117_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Accepted: 11/06/2021] [Indexed: 11/15/2022] Open
Abstract
Background Context: Cervical deformity (CD) correction is becoming more challenging and complex. Understanding the factors that drive optimal outcomes has been understudied in CD correction surgery. Purpose: The purpose of this study is to assess the factors associated with improved outcomes (IO) following CD surgery. Study Design Setting: Retrospective review of a single-center database. Patient Sample: Sixty-one patients with CD. Outcome Measures: The primary outcomes measured were radiographic and clinical “IO” or “poor outcome” (PO). Radiographic IO or PO was assessed utilizing Schwab pelvic tilt (PT)/sagittal vertical axis (SVA), and Ames cervical SVA (cSVA)/TS-CL. Clinical IO or PO was assessed using MCID EQ5D, Neck Disability Index (NDI), and/or improvement in Modified Japanese Orthopedic Association Scale (mJOA) modifier. The secondary outcomes assessed were complication and reoperation rates. Materials and Methods: CD patients with data available on baseline (BL) and 1-year (1Y) radiographic measures and health-related quality of life s were included in our study. Patients with reoperations for infection were excluded. Patients were categorized by IO, PO, or not. IO was defined as “nondeformed” radiographic measures as well as improved clinical outcomes. PO was defined as “moderate or severe deformed” radiographic measures as well as worsening clinical outcome measures. Random forest assessed ratios of predictors for IO and PO. The categorical regression models were utilized to predict BL regional deformity (Ames cSVA, TS-CL, horizontal gaze), BL global deformity (Schwab PI-LL, SVA, PT), regional/global change (BL to 1Y), BL disability (mJOA score), and BL pain/function impact outcomes. Results: Sixty-one patients met inclusion criteria for our study (mean age of 55.8 years with 54.1% female). The most common surgical approaches were as follows: 18.3% anterior, 51.7% posterior, and 30% combined. Average number of levels fused was 7.7. The mean operative time was 823 min and mean estimated blood loss was 1037 ml. At 1 year, 24.6% of patients were found to have an IO and 9.8% to have a PO. Random forest analysis showed the top 5 individual factors associated with an “IO” were: BL Maximum Kyphosis, Maximum Lordosis, C0-C2 Angle, L4-Pelvic Angle, and NSR Back Pain (80% radiographic, 20% clinical). Categorical IO regression model (R2 = 0.328, P = 0.007) found following factors to be significant: low BL regional deformity (β = ‒0.082), low BL global deformity (β = ‒0.099), global improve (β = 0.532), regional improve (β = 0.230), low BL disability (β = 0.100), and low BL NDI (β = 0.024). Random forest found the top 5 individual BL factors associated with “PO” (80% were radiographic): BL CL Apex, DJK angle, cervical lordosis, T1 slope, and NSR neck pain. Categorical PO regression model (R2 = 0.306, P = 0.012) found following factors to be significant: high BL regional deformity (β = ‒0.108), high BL global deformity (β = ‒0.255), global decline (β = 0.272), regional decline (β = 0.443), BL disability (β = ‒0.164), and BL severe NDI (>69) (β = 0.181). Conclusions: The categorical weight demonstrated radiographic as the strongest predictor of both improved (global alignment) and PO (regional deformity/deterioration). Radiographic factors carry the most weight in determining an improved or PO and can be ultimately utilized in preoperative planning and surgical decision-making to optimize the outcomes.
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Affiliation(s)
- Peter Gust Passias
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Katherine E Pierce
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Brandon Passano
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Muhammad B Tariq
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Salman Ahmad
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Vivek Singh
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Stephane Owusu-Sarpong
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Oscar Krol
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Bailey Imbo
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Lara Passfall
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Peter Tretiakov
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Tyler Williamson
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Rachel Joujon-Roche
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Waleed Ahmad
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Sara Naessig
- Departments of Orthopaedic and Neurologic Surgery, NYU Langone Orthopedic Hospital, New York Spine Institute, New York, USA
| | - Bassel Diebo
- Department of Orthopedics, SUNY Downstate, Brooklyn, NY, USA
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17
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Zhang Y, Shao Y, Liu H, Zhang J, He F, Chen A, Yang H, Pi B. Association between sagittal balance and adjacent segment degeneration in anterior cervical surgery: a systematic review and meta-analysis. BMC Musculoskelet Disord 2019; 20:430. [PMID: 31521137 PMCID: PMC6745077 DOI: 10.1186/s12891-019-2800-0] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Accepted: 08/29/2019] [Indexed: 12/30/2022] Open
Abstract
Background ASD is a relatively common degenerative alteration after cervical surgery which occurs above or below the fused segment. In addition, some patients may need reoperation to treat severe ASD after the primary surgery. It was considered that sagittal balance is correlated with postoperative clinical outcomes; however, few studies have reported the influence of sagittal balance on ASD. The present study is designed to investigate whether sagittal balance impacts the pathology of adjacent segment disease (ASD) in patients who undergo anterior cervical surgery for degenerative cervical disease. Methods Databases including Pubmed, Embase, Cochrane library, and Web of Science were used to search for literature published before June 2018. Review Manager 5.3 was used to perform the statistical analysis. Sagittal balance parameters before and after surgery were compared between patients with and without ASD. Weighted mean difference (WMD) was summarized for continuous data and P < 0.05 was set for the level of significance. Results A total of 221 patients with ASD and 680 patients without ASD from seven articles were studied in this meta-analysis. There were no significant differences in most sagittal balance parameters between the two groups, except for postoperative cervical lordosis (CL) (WMD -3.30, CI -5.91, − 0.69, P = 0.01). Conclusions Some sagittal balance parameters may be associated with the development of ASD after anterior cervical surgery. Sufficient restoration of CL may decrease the incidence of ASD. The results in present study needed to be expanded carefully and further high-quality studies are warranted to investigate the impact of sagittal balance on ASD. Electronic supplementary material The online version of this article (10.1186/s12891-019-2800-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yijian Zhang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China.,Orthopedic Institute, Soochow University, Suzhou, 215006, China
| | - Yijie Shao
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China.,Orthopedic Institute, Soochow University, Suzhou, 215006, China
| | - Hao Liu
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China.,Orthopedic Institute, Soochow University, Suzhou, 215006, China
| | - Junxin Zhang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China.,Orthopedic Institute, Soochow University, Suzhou, 215006, China
| | - Fan He
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China.,Orthopedic Institute, Soochow University, Suzhou, 215006, China
| | - Angela Chen
- Department of School of Public Health and Health Systems, Faculty of Applied Health Sciences Biochemistry Department, University of Waterloo, Waterloo, Canada
| | - Huilin Yang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China. .,Orthopedic Institute, Soochow University, Suzhou, 215006, China.
| | - Bin Pi
- Department of Orthopedics, The First Affiliated Hospital of Soochow University, 899, Pinghai Road, Suzhou, 215006, China. .,Orthopedic Institute, Soochow University, Suzhou, 215006, China.
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18
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Morimoto Y, Shigematsu H, Iwata E, Tanaka M, Okuda A, Masuda K, Yamamoto Y, Takeshima T, Nakagawa Y, Tanaka Y. Evaluating Cervical Sagittal Alignment in Cervical Myelopathy: Are Sitting Cervical Radiographs and Standing Whole-Spine Radiographs Equally Useful? Global Spine J 2019; 9:591-597. [PMID: 31448191 PMCID: PMC6693062 DOI: 10.1177/2192568218811841] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
STUDY DESIGN Retrospective review of medical charts and radiographic data. OBJECTIVES We aimed to clarify the differences in cervical alignment findings between sitting cervical lateral radiographs and standing whole-spine lateral radiographs with clavicle positioning in cervical spondylotic myelopathy (CSM) patients. METHODS We retrospectively evaluated the radiographs of 50 consecutive patients who underwent cervical surgery for CSM in our hospital. Cervical sagittal alignment was evaluated based on the C0-2 angles and C2-7 Gore and Cobb angles. Head position was evaluated in terms of the center of gravity of the head to C7 (CGH-C7) angle and the McGregor angle (ie, the angle between the McGregor line and a horizontal line). The T1-slope was also evaluated. RESULTS The mean values of the CGH-C7 angle and T1-slope were significantly lower, while the mean value of the McGregor angle was significantly higher on whole-spine lateral radiographs with clavicle positioning than on sitting cervical lateral radiographs. The mean values of the C0-2 and C2-7 angles did not differ significantly between the 2 radiographic positioning approaches. CONCLUSIONS Using whole-spine lateral radiographs with clavicle positioning may result in a significantly lower T1-slope and a posterior tilt of the head. In the absence of a compensatory change in cervical alignment, clavicle positioning may force patients to adopt an upward gazing position of the head. These compensatory mechanisms should be considered while evaluating cervical alignment on whole-spine lateral radiographs with clavicle positioning. Surgical planning should take into account the effect of posture on the radiographic appearance of cervical alignment.
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Affiliation(s)
- Yasuhiko Morimoto
- Nara Medical University, Kashihara City, Nara, Japan,Uda City Hospital, Uda City, Nara, Japan
| | - Hideki Shigematsu
- Nara Medical University, Kashihara City, Nara, Japan,Hideki Shigematsu, Department of Orthopedic Surgery,
Nara Medical University, 840 Shijo-cho, Kashihara City, Nara 634-8522, Japan.
| | | | - Masato Tanaka
- Nara Medical University, Kashihara City, Nara, Japan
| | - Akinori Okuda
- Nara Medical University, Kashihara City, Nara, Japan
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19
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Bortz CA, Passias PG, Segreto F, Horn SR, Lafage V, Smith JS, Line B, Mundis GM, Kebaish KM, Kelly MP, Protopsaltis T, Sciubba DM, Soroceanu A, Klineberg EO, Burton DC, Hart RA, Schwab FJ, Bess S, Shaffrey CI, Ames CP. Indicators for Nonroutine Discharge Following Cervical Deformity-Corrective Surgery: Radiographic, Surgical, and Patient-Related Factors. Neurosurgery 2019; 85:E509-E519. [DOI: 10.1093/neuros/nyz016] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2018] [Accepted: 01/29/2019] [Indexed: 11/14/2022] Open
Abstract
AbstractBACKGROUNDNonroutine discharge, including discharge to inpatient rehab and skilled nursing facilities, is associated with increased cost-of-care. Given the rising prevalence of cervical deformity (CD)-corrective surgery and the necessity of value-based healthcare, it is important to identify indicators for nonroutine discharge.OBJECTIVETo identify factors associated with nonroutine discharge after CD-corrective surgery using a statistical learning algorithm.METHODSA retrospective review of patients ≥18 yr with discharge and baseline (BL) radiographic data. Conditional inference decision trees identified factors associated with nonroutine discharge and cut-off points at which factors were significantly associated with discharge status. A conditional variable importance table used nonreplacement sampling set of 10 000 conditional inference trees to identify influential patient/surgical factors. The binary logistic regression indicated odds of nonroutine discharge for patients with influential factors at significant cut-off points.RESULTSOf 138 patients (61 yr, 63% female) undergoing surgery for CD (8 ± 5 levels; 49% posterior approach, 16% anterior, and 35% combined), 29% experienced nonroutine discharge. BL cervical/upper-cervical malalignment showed the strongest relationship with nonroutine discharge: C1 slope ≥ 14°, C2 slope ≥ 57°, TS-CL ≥ 57°. Patient-related factors associated with nonroutine discharge included BL gait impairment, age ≥ 59 yr and apex of CD primary driver ≥ C7. The only surgical factor associated with nonroutine discharge was fusion ≥ 8 levels. There was no relationship between nonhome discharge and reoperation within 6 mo or 1 yr (both P > .05) of index procedure. Despite no differences in BL EQ-5D (P = .946), nonroutine discharge patients had inferior 1-yr postoperative EQ-5D scores (P = .044).CONCLUSIONSevere preoperative cervical malalignment was strongly associated with nonroutine discharge following CD-corrective surgery. Age, deformity driver, and ≥ 8 level fusions were also associated with nonroutine discharge and should be taken into account to improve patient counseling and health care resource allocation.
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Affiliation(s)
- Cole A Bortz
- Department of Orthopedics, NYU Langone Orthopedic Hospital New York, New York
| | - Peter G Passias
- Department of Orthopedics, NYU Langone Orthopedic Hospital New York, New York
| | - Frank Segreto
- Department of Orthopedics, NYU Langone Orthopedic Hospital New York, New York
| | - Samantha R Horn
- Department of Orthopedics, NYU Langone Orthopedic Hospital New York, New York
| | - Virginie Lafage
- Department of Orthopedics, Hospital for Special Surgery, New York, New York
| | - Justin S Smith
- Department of Neurosurgery, University of Virginia, Charlottesville, Virginia
| | - Breton Line
- International Spine Study Group, Denver, Colorado
| | | | - Khaled M Kebaish
- Department of Orthopaedic Surgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Michael P Kelly
- Department of Orthopaedic Surgery, Washington University, St. Louis, Missouri
| | | | - Daniel M Sciubba
- Department of Neurosurgery, Johns Hopkins University School of Medicine, Baltimore, Maryland
| | - Alexandra Soroceanu
- Department of Orthopaedic Surgery, University of Calgary, Calgary, Alberta, Canada
| | - Eric O Klineberg
- Department of Orthopedic Surgery, University of California, Davis, California
| | - Douglas C Burton
- Department of Orthopedic Surgery, University of Kansas Medical Center, Kansas City, Kansas
| | - Robert A Hart
- Department of Orthopaedic Surgery, Swedish Neuroscience Institute, Seattle, Washington
| | - Frank J Schwab
- Department of Orthopedics, Hospital for Special Surgery, New York, New York
| | - Shay Bess
- Rocky Mountain Scoliosis and Spine, Denver, Colorado
| | | | - Christopher P Ames
- Department of Neurological Surgery, University of California, San Francisco, California
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20
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Kato S, Ganau M, Fehlings MG. Surgical decision-making in degenerative cervical myelopathy – Anterior versus posterior approach. J Clin Neurosci 2018; 58:7-12. [DOI: 10.1016/j.jocn.2018.08.046] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 08/13/2018] [Indexed: 11/16/2022]
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21
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Koller H, Ames C, Mehdian H, Bartels R, Ferch R, Deriven V, Toyone H, Shaffrey C, Smith J, Hitzl W, Schröder J, Robinson Y. Characteristics of deformity surgery in patients with severe and rigid cervical kyphosis (CK): results of the CSRS-Europe multi-centre study project. EUROPEAN SPINE JOURNAL : OFFICIAL PUBLICATION OF THE EUROPEAN SPINE SOCIETY, THE EUROPEAN SPINAL DEFORMITY SOCIETY, AND THE EUROPEAN SECTION OF THE CERVICAL SPINE RESEARCH SOCIETY 2018; 28:324-344. [PMID: 30483961 DOI: 10.1007/s00586-018-5835-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2018] [Revised: 10/25/2018] [Accepted: 11/15/2018] [Indexed: 10/27/2022]
Abstract
INTRODUCTION AND PURPOSE Little information exists on surgical characteristics, complications and outcomes with corrective surgery for rigid cervical kyphosis (CK). To collate the experience of international experts, the CSRS-Europe initiated an international multi-centre retrospective study. METHODS Included were patients at all ages with rigid CK. Surgical and patient specific characteristics, complications and outcomes were studied. Radiographic assessment included global and regional sagittal parameters. Cervical sagittal balance was stratified according to the CSRS-Europe classification of sagittal cervical balance (types A-D). RESULTS Eighty-eight patients with average age of 58 years were included. CK etiology was ankylosing spondlitis (n = 34), iatrogenic (n = 25), degenerative (n = 9), syndromatic (n = 6), neuromuscular (n = 4), traumatic (n = 5), and RA (n = 5). Blood loss averaged 957 ml and the osteotomy grade 4.CK-correction and blood loss increased with osteotomy grade (r = 0.4/0.6, p < .01). Patients with different preop sagittal balance types had different approaches, preop deformity parameters and postop alignment changes (e.g. C7-slope, C2-7 SVA, translation). Correction of the regional kyphosis angle (RKA) was average 34° (p < .01). CK-correction was increased in patients with osteoporosis and osteoporotic vertebrae (POV, p = .006). 22% of patients experienced a major long-term complication and 14% needed revision surgery. Patients with complications had larger preop RKA (p = .01), RKA-change (p = .005), and postop increase in distal junctional kyphosis angle (p = .02). The POV-Group more often experienced postop complications (p < .0001) and revision surgery (p = .02). Patients with revision surgery had a larger RKA-change (p = .003) and postop translation (p = .04). 21% of patients had a postop segmental motor deficit and the risk was elevated in the POV-Group (p = .001). CONCLUSIONS Preop patient specific, radiographic and surgical variables had a significant bearing on alignment changes, outcomes and complication occurrence in the treatment of rigid CK.
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Affiliation(s)
- H Koller
- Spine and Scoliosis Center, Schön Klinik Vogtareuth, Krankenhausstrasse 20, 83569, Vogtareuth, Germany. .,Department for Trauma and Sports Injuries, Paracelsus Medical University, Salzburg, Austria.
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