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Oba H, Ikegami S, Uehara M, Hatakenaka T, Miyaoka Y, Kurogochi D, Fukuzawa T, Mimura T, Sasao S, Fumiaki M, Koseki M, Takahashi J. Usefulness of modified S-line for upper instrumented vertebra selection in adolescent idiopathic scoliosis Lenke type 1C curve. Spine Deform 2024:10.1007/s43390-024-00920-0. [PMID: 38995614 DOI: 10.1007/s43390-024-00920-0] [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] [Received: 01/25/2024] [Accepted: 06/02/2024] [Indexed: 07/13/2024]
Abstract
PURPOSE Determine the effect of using the modified S-line vertebra (MSLV) as the upper instrumented vertebra (UIV) on postoperative trunk balance, L4 tilt, and clinical outcomes in selective thoracic fusion (STF) for adolescent idiopathic scoliosis (AIS) Lenke type 1C curve. METHODS Twenty-eight consecutive patients (all female; mean age: 15.4±2.0 years) with AIS Lenke type 1C curve were retrospectively enrolled. Primary outcome measures were coronal balance (absolute distance between C7 and the center of the sacral vertical line), L4 tilt, and Scoliosis Research Society (SRS)-22r scores at 2 years postoperatively. The group with the MSLV at the UIV was designated as the MSLV group (18 patients), and the group with the MSLV proximal (12 patients) or distal (4 patients) to the UIV was defined as the non-MSLV group. RESULTS We observed no significant differences between the groups regarding age, LIV and stable vertebra positioning, or preoperative X-ray parameters. Postoperative coronal balance was significantly better in the MSLV group (0.39±0.08 vs. 1.34±0.22 cm; P.
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Affiliation(s)
- Hiroki Oba
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan.
| | - Shota Ikegami
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Masashi Uehara
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Terue Hatakenaka
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Yoshinari Miyaoka
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Daisuke Kurogochi
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Takuma Fukuzawa
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Tetsuhiko Mimura
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Shinji Sasao
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Makiyama Fumiaki
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
| | - Michihiko Koseki
- Faculty of Textile Science and Technology, Shinshu University, 3-15-1 Tokida, Ueda, Nagano, 386-8567, Japan
| | - Jun Takahashi
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, Nagano, 390-8621, Japan
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Zhang Y, Bai J, Xiao B, Zhang J, He D, Xing Y, Liu B. Satisfactory immediate spontaneous correction may not mean satisfactory final results for moderate TL/L curves after selective thoracic fusion in AIS patients. BMC Musculoskelet Disord 2023; 24:543. [PMID: 37393267 PMCID: PMC10314374 DOI: 10.1186/s12891-023-06591-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 06/01/2023] [Indexed: 07/03/2023] Open
Abstract
BACKGROUND Few studies have focused on the chronic spontaneous behavior of the unfused TL/L curve during follow-up. The purpose of the present study was to explore the behavior of the unfused TL/L curve during a long-term follow-up to identify the risk factors for correction loss. METHODS Sixty-four age-matched female AIS patients undergoing selective thoracic fusion were enrolled. Patients were divided into 2 groups according to whether there was correction loss. Risk factors for correction loss of the unfused TL/L curves were analyzed. The relationship and difference between the immediate postoperative thoracic and TL/L Cobb angles were explored. RESULTS The TL/L Cobb angle was 28.17° before surgery, 8.60° after surgery, and 10.74° at the final follow-up, with a correction loss of 2.14°. Each subgroup contained 32 cases. A smaller postoperative TL/L Cobb angle was the only risk factor that was independently associated with TL/L correction loss. In the LOSS group, there was a significant difference and no correlation between the immediate postoperative TL/L and the thoracic Cobb angle. In the NO-LOSS group, there was a moderate correlation and no difference between them. CONCLUSION A smaller immediate postoperative TL/L Cobb angle may have been associated with TL/L correction loss during the long-term follow-up. Thus, good immediate postoperative spontaneous correction may not mean a satisfactory outcome at the final follow-up after STF. Mismatch between thoracic and TL/L Cobb angles immediately after surgery may also be related to correction loss of the unfused TL/L curves. Close attention should be paid in case of deterioration.
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Affiliation(s)
- Yanbin Zhang
- Department of Spine Surgery, Beijing Jishuitan Hospital, Xicheng District Xinjiekou No. 31 East Street, Beijing, 100035 P.R. China
| | - Jing Bai
- Department of Trauma and Joint, The Third Affiliated Hospital of Beijing University of Traditional Chinese Medicine, Chaoyang District Anwai Xiaoguan Street No. 51, Beijing, 100029 P.R. China
| | - Bin Xiao
- Department of Spine Surgery, Beijing Jishuitan Hospital, Xicheng District Xinjiekou No. 31 East Street, Beijing, 100035 P.R. China
| | - Jianguo Zhang
- Department of Orthopedics of Peking Union Medical College Hospital, 1Shuai Fu Yuan, Beijing, 100730 P.R. China
| | - Da He
- Department of Spine Surgery, Beijing Jishuitan Hospital, Xicheng District Xinjiekou No. 31 East Street, Beijing, 100035 P.R. China
| | - Yonggang Xing
- Department of Spine Surgery, Beijing Jishuitan Hospital, Xicheng District Xinjiekou No. 31 East Street, Beijing, 100035 P.R. China
| | - Bo Liu
- Department of Spine Surgery, Beijing Jishuitan Hospital, Xicheng District Xinjiekou No. 31 East Street, Beijing, 100035 P.R. China
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Bane T, Luhmann SJ. Isolated main thoracic curve fusion in idiopathic scoliosis: optimizing radiographic outcomes using lumbar modifiers to guide correction. Spine Deform 2023; 11:657-664. [PMID: 36811706 DOI: 10.1007/s43390-023-00650-9] [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] [Received: 10/20/2022] [Accepted: 01/14/2023] [Indexed: 02/24/2023]
Abstract
PURPOSE Does differential correction of main thoracic curve (MTC) and instrumented LIV angulation based on lumbar modifiers affect radiographic outcomes, and can preoperative supine AP radiograph be used to guide correction for optimal final radiographic alignment. METHODS Retrospective analysis of idiopathic scoliosis patients who underwent selective thoracic fusions (LIV T11-L1) for Lenke 1 and 2 curve patterns, < 18 years of age. 2-year minimum follow-up. Optimal outcome meant LIV + 1 of < 5 degrees disk-wedging and C7-CSVL < 2 cm. 82 patients met inclusion criteria (70% female), mean age 14.1 years. RESULTS 24 patients were A modifier, 21 B modifier, and 37 C modifier. There were 52 optimal and 30 suboptimal outcomes. LIV was not associated with outcome (p = 0.08). For optimal outcomes, A modifiers' MTC improved 65%, B modifiers 65%, and C modifiers 59%. C modifiers' MTC correction was less than A modifiers (p = 0.03) but equivalent to B modifiers' (p = 0.10). A modifiers' LIV + 1 tilt improved 65%, B modifiers 64%, and C modifiers 56%. C modifiers' instrumented LIV angulation was greater than A modifiers' (p < 0.01) but equivalent to B modifiers' (p = 0.06). Preoperative supine LIV + 1 tilt was 16o in optimal outcomes and 15° in suboptimal outcomes. Instrumented LIV angulation was 9° for both. The correction between preoperative LIV + 1 tilt and instrumented LIV angulation was not significantly different between groups (p = 0.67). CONCLUSION Differential MTC and LIV tilt correction based on lumbar modifier may be a valid goal. Optimizing radiographic outcome by matching instrumented LIV angulation to preoperative supine LIV + 1 tilt could not be proven. LEVEL OF EVIDENCE IV.
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Affiliation(s)
- Thomas Bane
- Department of Orthopaedic Surgery, Washington University School of Medicine, 1 Children's Place, Suite 4S60, St. Louis, MO, 63110, USA
| | - Scott J Luhmann
- Department of Orthopaedic Surgery, Washington University School of Medicine, 1 Children's Place, Suite 4S60, St. Louis, MO, 63110, USA.
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Kaya O, Kara D, Gok H, Kahraman S, Sanlı T, Karadereler S, Enercan M, Hamzaoglu A. The Importance of Lumbar Curve Flexibility and Apical Vertebral Rotation for the Prediction of Spontaneous Lumbar Curve Correction in Selective Thoracic Fusion for Lenke Type 1 and 2 C Curves: Retrospective Cohort Study with a Mean Follow-Up of More than 10 years. Global Spine J 2022; 12:1516-1523. [PMID: 35485204 PMCID: PMC9393973 DOI: 10.1177/21925682221098667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
STUDY DESIGN Retrospective analysis of a prospectively collected data. OBJECTIVE Lumbar flexibility(LF) is generally defined with preoperative side bending films;it is not clear what percentage of LF predicts the spontaneous lumbar curve correction (SLCC) at long term follow up. Aim of this study was to find out cut-off value of preoperative LF,apical vertebra rotation(AVR) and apical vertebral translation(AVT);which may predict more than 50%SLCC. METHODS Patients with Lenke 1C&2C curves,treated with posterior STF,with a minimum 10 years follow up were included.The patients who had more than 50% SLCC(Group A) or less than 50% (Group B) were compared in terms of LF,AVR and AVT to understand a cut-off value of those parameters.Statistically, Receiver Operating Characteristic(ROC) test was used. RESULTS Fifty five AIS patients (54F, 1M) with mean age 14 (11-17) were included to study.Thoracic curve correction rate was 75%;lumbar curve correction rate was 59% at the latest follow up.Group A included 45(82%) patients at the latest follow up.Three patients (5%) showed coronal decompensation at early postop and 2 of them became compensated at f/up.ROC analyses showed 69% flexibility as the cut-off value for SLCC (P < .01).The difference between groups in terms of preop mean AVRs was significant (P = .029) (Group A = 1.9; Group B = 2.4). CONCLUSION In Lenke 1C&2C curves,whenever LF on the preoperative bending x-ray is greater than 70% (P < .01)and AVR is equal or less than grade 2,STF provides satisfactory clinical and radiological SLCC with more than mean 10 years f/up.This flexibility rate and apical vertebral rotation can be helpful in decision making for successful STF.
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Affiliation(s)
- Ozcan Kaya
- Department of Orthopedics and Traumatology, SBU Istanbul Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey,Ozcan Kaya, MD, Department of Orthopaedics and Traumatology, SBU Istanbul Kanuni Sultan Suleyman Training and Research Hospital, Atakent Mh, Turgut Ozal Bulvari No:46/1, Kucukcekmece, Istanbul 34303, Turkey.
| | - Deniz Kara
- Istanbul Spine Center, Istanbul Florence Nightingale Hospital, Istanbul, Turkey
| | - Halil Gok
- Istanbul Spine Center, Istanbul Florence Nightingale Hospital, Istanbul, Turkey
| | - Sinan Kahraman
- Department of orthopedics and spine surgery, Kadikoy Florence Nightingale Hospital, Istanbul, Turkey
| | - Tunay Sanlı
- Istanbul Spine Center, Istanbul Florence Nightingale Hospital, Istanbul, Turkey
| | - Selhan Karadereler
- Istanbul Spine Center, Istanbul Florence Nightingale Hospital, Istanbul, Turkey
| | - Meric Enercan
- Istanbul Spine Center, Istanbul Florence Nightingale Hospital, Istanbul, Turkey,Istanbul Spine Center, Demiroglu Bilim University, Istanbul, Turkey
| | - Azmi Hamzaoglu
- Istanbul Spine Center, Istanbul Florence Nightingale Hospital, Istanbul, Turkey
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Bizzoca D, Piazzolla A, Solarino G, Moretti L, Moretti B. Subjective perception of spinal deformity after selective versus non-selective fusion of Lenke 1C curves. Spine Deform 2022; 10:855-863. [PMID: 35133641 PMCID: PMC9187554 DOI: 10.1007/s43390-022-00479-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 01/22/2022] [Indexed: 11/27/2022]
Abstract
PURPOSE To assess the self-image perception and the Quality-of-Life (QoL) in female adolescents, with Lenke 1C scoliosis curves, treated with selective versus non-selective posterior spinal instrumentation and fusion (PSF). METHODS Patients undergoing PSF for idiopathic adolescent scoliosis (AIS) were recruited and divided into two groups: patients managed with selective thoracic fusion (STF) were included in Group A, whereas patients treated with non-selective fusion (N-STF) in Group B. Each patient completed the Italian version of the Scoliosis Research Society-22R questionnaire (SRS-22R), the Quality-of-Life Profile for Spinal Deformities questionnaire (QLPSD) and the Spinal Appearance Questionnaire (SAQ), before surgery and at 24-month follow-up. RESULTS One hundred and fifty seven female patients (mean age 16.38) were included in this study. 80 patients underwent STF, while 77 patients received N-STF. At 24-month follow-up, patients managed with N-STF showed better SRS-22R self-image mean score (p = .012), SRS-22R satisfaction mean score (p = .033), QLPSD body image mean score (p = .005), but worse SRS-22 function mean score (p = .006) and QLPSD back flexibility mean score (p = .007), compared with patients who underwent STF. In terms of self-image perception, patients undergoing STF showed significantly worse SAQ total mean score (p = .002), SAQ appearance mean score (p = .001) and SAQ expectation (p = .001). We found a significant correlation between SAQ appearance mean score and SRS-22R self-image (R = - 0.721), SRS-22 mental health (R = - 0.8), QLPSD psychosocial functioning (R = 0.7) and QLPSD back flexibility (R = 0.8). CONCLUSION Although the STF of Lenke 1C curves provides better functional outcomes, in the present study, female patients receiving STF revealed a worse perceived body image, compared with patients treated with N-STF, at 24-month follow-up. Particular attention should be addressed to the preoperative patient's mental health and body image perception, when choosing between STF and N-STF.
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Affiliation(s)
- Davide Bizzoca
- UOSD Spinal Deformity Center, AOU Consorziale "Policlinico", Bari, Italy. .,Orthopaedic and Trauma Unit, Department of Basic Medical Sciences, Neuroscience and Sense Organs, Spine Unit, University of Bari Aldo Moro, AOU Consorziale "Policlinico", Piazza Giulio Cesare 11, 70214, Bari, Italy.
| | - Andrea Piazzolla
- UOSD Spinal Deformity Center, AOU Consorziale “Policlinico”, Bari, Italy
| | - Giuseppe Solarino
- Orthopaedic and Trauma Unit, Department of Basic Medical Sciences, Neuroscience and Sense Organs, Spine Unit, University of Bari Aldo Moro, AOU Consorziale “Policlinico”, Piazza Giulio Cesare 11, 70214 Bari, Italy
| | - Lorenzo Moretti
- Orthopaedic and Trauma Unit, Department of Basic Medical Sciences, Neuroscience and Sense Organs, Spine Unit, University of Bari Aldo Moro, AOU Consorziale “Policlinico”, Piazza Giulio Cesare 11, 70214 Bari, Italy
| | - Biagio Moretti
- Orthopaedic and Trauma Unit, Department of Basic Medical Sciences, Neuroscience and Sense Organs, Spine Unit, University of Bari Aldo Moro, AOU Consorziale “Policlinico”, Piazza Giulio Cesare 11, 70214 Bari, Italy
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Chen K, Zhai X, Zhou T, Deng Y, Zhang B, Chen S, Yang C, Li M. Characteristics analysis of segmental and regional lumbar spontaneous compensation post thoracic fusion in Lenke 1 and 2 adolescent idiopathic scoliosis. BMC Musculoskelet Disord 2021; 22:935. [PMID: 34758789 PMCID: PMC8582136 DOI: 10.1186/s12891-021-04821-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Accepted: 10/26/2021] [Indexed: 12/03/2022] Open
Abstract
Objective To explore the characteristics of compensation of unfused lumbar region post thoracic fusion in Lenke 1 and 2 adolescent idiopathic scoliosis. Background Preserving lumbar mobility in the compensation is significant in controlling pain and maintaining its functions. The spontaneous correction of the distal unfused lumbar curve after STF has been widely reported, but previous study has not concentrated on the characteristics of compensation of unfused lumbar region post thoracic fusion. Method A total of 51 Lenke 1 and2 AIS patients were included, whose lowest instrumented vertebrae was L1 from January 2013 to December 2019. For further analysis, demographic data and coronal radiographic films were collected before surgery, at immediate erect postoperatively and final follow-up. The wedge angles of each unfused distal lumbar segments were measured, and the variations in each disc segment were calculated at the immediate postoperative review and final follow-up. Meanwhile, the unfused lumbar curve was divided into upper and lower parts, and we calculated their curve angles and compensations. Results The current study enrolled 41 females (80.4%) and 10 males (19.6%). Thirty-six patients were Lenke type 1, while 15 patients were Lenke type 2. The average main thoracic Cobb angle and thoracolumbar/lumbar Cobb angle were 44.1 ± 7.7°and 24.1 ± 9.3°, preoperatively. At the final follow-up, the disc wedge angle variation of L1/2, L2/3, L3/4, L4/5 and L5/S1 was 3.84 ± 5.96°, 3.09 ± 4.54°, 2.30 ± 4.53°, − 0.12 ± 3.89° and − 1.36 ± 2.80°, respectively. The compensation of upper and lower coronal lumbar curves at final follow-up were 9.22 ± 10.39° and − 1.49 ± 5.14°, respectively. Conclusion When choosing L1 as the lowest instrumented vertebrae, the distal unfused lumbar segments’ compensation showed a decreasing trend from the proximal end to the distal end. The adjacent L1/2 and L2/3 discs significantly contributed to this compensation.
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Affiliation(s)
- Kai Chen
- Department of Orthopedics, Shanghai Changhai Hospital, No. 168, Changhai Road, Shanghai, 200433, China
| | - Xiao Zhai
- Department of Orthopedics, Shanghai Changhai Hospital, No. 168, Changhai Road, Shanghai, 200433, China
| | - Tianjunke Zhou
- Basic medicine college, Navy Medical University, Shanghai, 200433, China
| | - Yu Deng
- Faculty of Anesthesiology, Shanghai Changhai Hopital, Shanghai, 200433, China
| | - Beichen Zhang
- Department of Rehabilitation, The First Rehabilitation Hospital of Shanghai, Shanghai, 200082, China
| | - Shaofeng Chen
- Department of Orthopedics, Shanghai Changhai Hospital, No. 168, Changhai Road, Shanghai, 200433, China
| | - Changwei Yang
- Department of Orthopedics, Shanghai Changhai Hospital, No. 168, Changhai Road, Shanghai, 200433, China.
| | - Ming Li
- Department of Orthopedics, Shanghai Changhai Hospital, No. 168, Changhai Road, Shanghai, 200433, China.
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Pasha S, Shah S, Newton P. Machine Learning Predicts the 3D Outcomes of Adolescent Idiopathic Scoliosis Surgery Using Patient-Surgeon Specific Parameters. Spine (Phila Pa 1976) 2021; 46:579-587. [PMID: 33821816 DOI: 10.1097/brs.0000000000003795] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Retrospective descriptive, multicenter study. OBJECTIVE The aim of this study was to predict the three-dimensional (3D) radiographic outcomes of the spinal surgery in a cohort of adolescent idiopathic scoliosis (AIS) as a function preoperative spinal parameters and surgeon modifiable factors. SUMMARY OF BACKGROUND DATA Current guidelines for posterior spinal fusion surgery (PSF) in AIS patients are based on two-dimensional classification of the spinal curves. Despite the high success rate, the prediction of the 3D spinal alignment at the follow-ups remains inconclusive. A data-driven surgical decision-making method that determines the combination of the surgical procedures and preoperative patient specific parameters that leads to a specific 3D global spinal alignment outcomes at the follow-ups can lessen the burden of surgical planning and improve patient satisfaction by setting expectations prior to surgery. METHODS A dataset of 371 AIS patients who underwent a PSF with two-year follow-up were included. Demographics, 2D radiographic spinal and pelvic measurements, clinical measurements of the trunk shape, and the surgical procedures were collected prospectively. A previously developed classification of the preoperative global 3D spinal alignment was used as an additional predictor. The 3D spinal alignment (vertebral positions and rotations) at two-year follow-up was used as the predicted outcome. An ensemble learner was used to predict the 3D spinal alignment at two-year follow-up as a function of the preoperative parameters with and without considering the surgeon modifiable factors. RESULTS The preoperative and surgical factors predicted three clusters of 3D surgical outcomes with an accuracy of 75%. The prediction accuracy decreased to 64% when only preoperative factors, without the surgical factors, were used in the model. Predictor importance analysis determined that preoperative distal junctional kyphosis, pelvic sagittal parameters, end-instrumented vertebra (EIV) angulation and translation, and the preoperative 3D clusters are the most important patient-specific predictors of the outcomes. Three surgical factors, upper and lower instrumented vertebrae, and the operating surgeon, were important surgical predictors. The role of surgeon in achieving a certain outcome clusters for specific ranges of preoperative T10-L2 kyphosis, EIV angulation and translation, thoracic and lumbar flexibilities, and patient's height was significant. CONCLUSION Both preoperative patient-specific and surgeon modifiable parameters predicted the 3D global spinal alignment at two-year post PSF. Surgeon was determined as a predictor of the outcomes despite including 20 factors in the analysis that described the surgical moves. Methods to quantify the differences between the implemented surgeon modifiable factors are essential to improve outcome prediction in AIS spinal surgery.Level of Evidence: 3.
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Affiliation(s)
- Saba Pasha
- Department of Orthopedic Surgery, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Suken Shah
- Department of Orthopedic Surgery, Nemours/Alfred I. duPont Hospital for Children, Wilmington, DE
| | - Peter Newton
- Department of Orthopedic Surgery, Rady Children's Hospital, San Diego, CA
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Defining criteria for optimal lumbar curve correction following the selective thoracic fusion surgery in Lenke 1 adolescent idiopathic scoliosis: developing a decision tree. EUROPEAN JOURNAL OF ORTHOPAEDIC SURGERY AND TRAUMATOLOGY 2019; 30:513-522. [PMID: 31760495 DOI: 10.1007/s00590-019-02596-z] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Accepted: 11/13/2019] [Indexed: 10/25/2022]
Abstract
OBJECTIVE The aim of this study was to identify the range of optimal versus suboptimal rates of spontaneous lumbar Cobb correction (SLCC%) and the factors predicting such outcomes in a cohort of Lenke 1 adolescent idiopathic scoliosis (AIS) after posterior spinal fusion surgery. METHODS Seventy-one consecutive Lenke1 B and C AIS patients with a fusion level to L1 and higher with two-year follow-up were included. Thoracic kyphosis (T1-T4 and T4-T12 TK), lumbar lordosis (L1-S1 LL), thoracic and lumbar Cobb angles, thoracic and lumbar apical vertebral rotations and translations (AVR and AVT), pelvic incidence, sacral slope, and sagittal and frontal balances were measured at preoperative, early postoperative, and two-year follow-up. The SLCC% was calculated between preoperative and two-year follow-up. A clustering analysis determined the subgroups of patients with significantly higher and lower (optimal versus suboptimal) rate of SLCC% in the cohort at two-year follow-up. The cutoff values of the preoperative and early postoperative radiographic parameters that significantly predicted the optimal and suboptimal SLCC% were determined using a decision tree. RESULTS The averages of the optimal versus suboptimal range of SLCC% in the cohort were 72% [55%, 105%] versus 39% [- 7%, 42%]. Preoperative and early postoperative spinal parameters predicted the optimal versus suboptimal SLCC% with an accuracy of 82%, 95%CI [0.73-0.94]. Preoperative AVTLumbar < 10 mm was a predictor of optimal SLCC%. In patients with a preoperative AVTLumbar > 10 mm, early postoperative T4-T12 TK < 24° (but not less than 17°) accompanied by - 5° < AVRThoracic < 5° were the main predictors of optimal SLCC% in our cohort. CONCLUSION Quantitative clustering of the SLCC% into optimal and suboptimal groups allowed identifying the cutoff values of preoperative (AVTLumbar) and early postoperative (T4-T12 TK and AVRThoracic) spinal parameters that can predict the optimal range of SLCC% at two-year postoperative in our cohort of Lenke 1 AIS. LEVEL OF EVIDENCE IV.
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Koller H, Hitzl W, Marks MC, Newton PO. Accurate prediction of spontaneous lumbar curve correction following posterior selective thoracic fusion in adolescent idiopathic scoliosis using logistic regression models and clinical rationale. 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 2019; 28:1987-1997. [PMID: 31236658 DOI: 10.1007/s00586-019-06000-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Revised: 04/17/2019] [Accepted: 05/05/2019] [Indexed: 01/20/2023]
Abstract
INTRODUCTION Accurate prediction of spontaneous lumbar curve correction (SLCC) after selective thoracic fusion (STF) remains difficult. This study sought to improve prediction accuracy of SLCC. The hypothesis was preoperative and intraoperative variables could predict SLCC < 20°. METHODS A multicenter observational prospective analysis was conducted to determine predictors of SLCC in AIS patients that had posterior STF. Curve types included major thoracic curves (Lenke 1, 3-4).The primary outcome variable was to establish prediction models, and a postoperative lumbar curve (LC) ≤ 20° was defined as the target variable. Multivariate logistic regression models were established to study the relationship between selected variables and a LC ≤ 20° versus a LC > 20° at ≥ 2-year follow-up. Single and dual thresholds models in perspective of clinical rationales were applied to find models with the highest positive/negative predictive values (PPV/NPV). The secondary outcome measure was SRS scores at ≥ 2-year follow-up. RESULTS 410 patients were included. At ≥ 2-year follow-up 282 patients had LC ≤ 20°. These patients had better SRS-22 scores than those with LC > 20° (P = 0.02). The postoperative LC and LC ≤ 20° were predicted by preoperative LC and LC-bending Cobb angle (P < 0.01, r = 0.4-0.6). Logistic regression models could be established to identify patients at risk for failing the target LC ≤ 20°.For preoperative LC and LC-bending, the prediction model achieved a NPV/PPV of 80%/72%. If the postoperative main thoracic curve is combined with the preoperative LC and a gray area for difficult decisions was allowed, model accuracy could even be improved (NPV/PPV = 96%/81%). CONCLUSION An accurate prediction model for postoperative SLCC was established based on a large analysis of prospective STF cases. These models can support prediction and understanding of postoperative SLCC aiding in surgical decision making when contemplating a selective thoracic fusion. These slides can be retrieved under Electronic Supplementary Material.
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Affiliation(s)
- H Koller
- Department of Neurosurgery, Klinikum rechts der Isar, Technische Universität München, Ismaninger Str. 22, 81675, Munich, Germany. .,Department for Traumatology and Sports Injuries, Paracelsus Medical University, Salzburg, Austria.
| | - W Hitzl
- Research Office, Biostatistics, Paracelsus Medical University, Salzburg, Austria
| | - M C Marks
- Setting Scoliosis Straight, Harms Study Group, San Diego, USA
| | - P O Newton
- Department of Orthopedic Surgery, Rady Children's Hospital San Diego, University of California San Diego, San Diego, CA, USA
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Ishikawa M, Nishiyama M, Kamata M. Selective Thoracic Fusion for King-Moe Type II/Lenke 1C Curve in Adolescent Idiopathic Scoliosis: A Comprehensive Review of Major Concerns. Spine Surg Relat Res 2019; 3:113-125. [PMID: 31435563 PMCID: PMC6690091 DOI: 10.22603/ssrr.2018-0047] [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] [Subscribe] [Scholar Register] [Received: 07/08/2018] [Accepted: 07/25/2018] [Indexed: 11/05/2022] Open
Abstract
INTRODUCTION Controversies still exist in the surgical indications and outcomes of selective thoracic fusion (STF) for a primary thoracic curve with a compensatory large lumbar curve (King-Moe type II/Lenke 1C curve) in adolescent idiopathic scoliosis (AIS). Issues of the greatest concern regarding this curve type include curve criteria that indicate STF to prevent postoperative coronal decompensation and postoperative radiographic outcomes, including curve correction, coronal balance, and thoracolumbar kyphosis, after STF. METHODS This review comprehensively documents the issues raised in the literature regarding surgical indications and radiographic outcomes of STF for King-Moe type II/Lenke 1C curve in AIS. RESULTS Studies suggest that radiographic curve criteria indicating STF for this curve type include the preoperative dominance of the thoracic curve to the lumbar curve in the Cobb angle and the characteristics of the lumbar curve in magnitude and flexibility. Studies warn the need for a careful clinical evaluation of the thoracic and lumbar rotational prominences. Documented radiographic outcomes of importance include the postoperative behavior of the unfused lumbar curve, coronal or sagittal decompensation after STF, and factors associated with these issues. A comprehensive review of the literature suggests that the use of a segmental pedicle screw construct and better instrumented thoracic curve correction achieve better spontaneous lumbar curve correction. Although the causes of postoperative coronal decompensation remain multifactorial, preoperative coronal decompensation to the left and an inappropriate selection of the lowest instrumented vertebra are consistently reported to be the major causative factors. CONCLUSIONS STF has been validated in general for the treatment of King-Moe type II or Lenke 1C curve in AIS; however, controversies remain regarding the surgical indications and outcomes. Long-term impacts of residual lumbar curve, coronal decompensation, and mild thoracolumbar kyphosis on clinical outcomes after STF, along with optimal indications and strategy for STF, should further be assessed.
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Affiliation(s)
| | - Makoto Nishiyama
- Spine and Spinal Cord Center, Mita Hospital, International University of Health and Welfare, Tokyo, Japan
| | - Michihiro Kamata
- Department of Orthopaedic Surgery, Keiyu Hospital, Kanagawa, Japan
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Relationships Between the Axial Derotation of the Lower Instrumented Vertebra and Uninstrumented Lumbar Curve Correction: Radiographic Outcome in Lenke 1 Adolescent Idiopathic Scoliosis With a Minimum 2-Year Follow-up. J Pediatr Orthop 2018; 38:e194-e201. [PMID: 29360660 DOI: 10.1097/bpo.0000000000001136] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND Preoperative spinal parameters are used to guide the fusion levels in adolescent idiopathic scoliosis (AIS) spinal surgery. However, the impact of the factors modifiable by the surgeon in varying levels of preoperative patient-specific variables is not fully explored. The goal of this study was to identify the association between axial rotation correction of the lower instrumented vertebra (LIV) and spontaneous correction of the uninstrumented lumbar spine as a function of preoperative 3 dimensional (3D) curve characteristics in Lenke 1 AIS. METHODS Twenty-three Lenke1 AIS with a minimum 2-year follow-up were included. All patients had biplanar spinal x-rays and 3D reconstructions at preoperative, first erect, and 2-year follow-up visits. Five patient factors were measured preoperatively: kyphosis and lumbar modifiers, and thoracic to lumbar curve rotation, translation, and frontal deformity angle ratios. One surgical factor, percentage of LIV rotation correction, was determined from the preoperative and first erect 3D models. A factorial design analysis was implemented to determine the impact of surgical and patient factors, both separately and in combination, on 2-year radiographic outcomes of spontaneous correction of the uninstrumented spine. RESULTS Spontaneous lumbar Cobb and lumbar apical rotation correction were predicted significantly by patient and surgical factors, P<0.05. Lumbar modifier, percentage correction of LIV rotation, the interaction between LIV rotation correction and lumbar modifier, and the interaction between LIV rotation correction and thoracic to lumbar apical vertebrae translation ratio correlated significantly to 2-year outcomes of spontaneous lumbar Cobb correction, P<0.05. Lumbar modifier and the interaction between the Cobb ratio and the percentage of the LIV rotation correction correlated significantly to 2-year outcomes of lumbar apical rotation correction, P<0.05. CONCLUSION The relationship between LIV rotation correction and spontaneous lumbar curve correction after selective thoracic fusion varied based on the patient's 3D preoperative curve characteristics. Patients with lumbar modifier C and apical vertebrae translation ratios >1.5 showed improved lumbar Cobb correction in 2-years when 50% or more LIV rotation correction was achieved surgically.
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Lin Y, Chen W, Chen A, Li F, Xiong W. Anterior versus Posterior Selective Fusion in Treating Adolescent Idiopathic Scoliosis: A Systematic Review and Meta-Analysis of Radiologic Parameters. World Neurosurg 2018; 111:e830-e844. [DOI: 10.1016/j.wneu.2017.12.161] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2017] [Revised: 12/24/2017] [Accepted: 12/27/2017] [Indexed: 10/18/2022]
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Sullivan TB, Bastrom TP, Bartley CE, Shah SA, Lonner BS, Asghar J, Miyanji F, Newton PO, Yaszay B. Selective thoracic fusion of a left decompensated main thoracic curve: proceed with caution? 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 2017; 27:312-318. [DOI: 10.1007/s00586-017-5158-8] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2016] [Revised: 04/14/2017] [Accepted: 05/25/2017] [Indexed: 11/29/2022]
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Koller H, Schulte TL, Meier O, Koller J, Bullmann V, Hitzl W, Mayer M, Lange T, Schmücker J. The influence of isolated thoracoplasty on the evolution of pulmonary function after treatment of severe thoracic scoliosis. 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 2017; 26:1765-1774. [DOI: 10.1007/s00586-017-4982-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/23/2016] [Revised: 01/07/2017] [Accepted: 01/27/2017] [Indexed: 11/24/2022]
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Sudo HS, Mayer MM, Kaneda KK, Núñez-Pereira S, Shono SY, Hitzl WH, Iwasaki NI, Koller HK. Maintenance of spontaneous lumbar curve correction following thoracic fusion of main thoracic curves in adolescent idiopathic scoliosis. Bone Joint J 2017; 98-B:997-1002. [PMID: 27365480 DOI: 10.1302/0301-620x.98b7.37587] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2015] [Accepted: 03/16/2016] [Indexed: 11/05/2022]
Abstract
AIMS The aims of our study were to provide long-term information on the behaviour of the thoracolumbar/lumbar (TL/L) curve after thoracic anterior correction and fusion (ASF) and to determine the impact of ASF on pulmonary function. PATIENTS AND METHODS A total of 41 patients (four males, 37 females) with main thoracic (MT) adolescent idiopathic scoliosis (AIS) treated with ASF were included. Mean age at surgery was 15.2 years (11 to 27). Mean follow-up period was 13.5 years (10 to 18). RESULTS For the TL/L curve, the mean curve flexibility evaluated with supine pre-operative bending radiographs was 78.6% (standard deviation 16.5%), with no significant loss of correction observed. On comparing patients with an increase of the TL/L curve increase (> 4º, n = 9, 22%) to those without, significant differences were observed in the correction rate of the MT curve at the final follow-up (p = 0.011), correction loss of the MT curve (p = 0.003) and the proportion of patients who had semi-rigid instrumentation (p = 0.003). Pre-operative percentage predicted forced vital capacity (%FVC) was 80%, dropping to 72% at final follow-up (p < 0.001). The Scoliosis Research Society questionnaire score was not significantly different between patients with and without a TL/L curve increase (p = 0.606). Spontaneous lumbar curve correction (SLCC) was maintained up to 18 years following selective ASF in most patients and demonstrated significant correlation with maintenance of MT curve correction. CONCLUSION Maintenance of MT curve correction using rigid instrumentation provided stable SLCC over time. An observed 8% decrease in %FVC indicates that ASF should be reserved for patients with no or only mild pulmonary impairment. Cite this article: Bone Joint J 2016;98-B:997-1002.
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Affiliation(s)
- H S Sudo
- Hokkaido University Graduate School of Medicine, North-15, West-7, Kita-ku, Sapporo, Hokkaido, 0608638, Japan
| | - M M Mayer
- Schoen-Clinic Vogtareuth, Krankenhausstr. 20, 83569 Vogtareuth, Germany
| | - K K Kaneda
- Orthopaedic Hokushin Hospital, Kikusuimotomachi 3-3, Sapporo, Hokkaido 003-0823, Japan
| | - S Núñez-Pereira
- St Franziskus Hospital, Schönsteinstr 63, 50825 Cologne, Germany
| | - S Y Shono
- Japan Community Health Care Organization Hokkaido Hospital, Nakanoshima 1-8, Sapporo, Hokkaido 062-8618, Japan
| | - W H Hitzl
- Paracelsus Medical University Salzburg, Research Office, Strubergasse 21, A-5020 Salzburg, Austria
| | - N I Iwasaki
- Hokkaido University Graduate School of Medicine, North-15, West-7, Kita-ku, Sapporo, Hokkaido, 0608638, Japan
| | - H K Koller
- Werner-Wicker-Clinic Bad Wildungen, Im Kreuzfeld 4, D-34537 Bad Wildungen, Germany
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