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Ramchandran S, Pierce A, Callan C, Ramzanian T, Mohile N, Keshavarzi S, Errico T, George S. Does levelling of T1 tilt intra-operatively affect post-operative shoulder balance in adolescent idiopathic scoliosis patients? Spine Deform 2024:10.1007/s43390-024-00922-y. [PMID: 38981952 DOI: 10.1007/s43390-024-00922-y] [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: 02/21/2024] [Accepted: 06/15/2024] [Indexed: 07/11/2024]
Abstract
INTRODUCTION Previous studies have shown that T1 tilt is positively correlated with post-operative shoulder balance (SB). The aim of this study was to explore the role of intra-operative T1 tilt, among other shoulder parameters as a potential parameter to predict post-operative SB in adolescent idiopathic scoliosis (AIS) patients. METHODS A retrospective review of AIS patients with structural thoracic curves with minimum 2 year follow up was conducted from a single tertiary center. Standing pre-operative, 1st erect, 1 year and 2-year follow-up; and intra-operative final prone radiographs were reviewed along with clinical data. Patients were stratified into 2 cohorts: Group A-Final intra-operative T1 tilt ≤5° and Group B-Final intra-operative T1 tilt >5°. These groups were compared for post-operative SB as a whole and separately for patients with baseline right or left shoulder high and if UIV was T2 or T3/T4. Patients with optimal SB (Radiographic shoulder height (RSH) <2 cm) at 2 years were compared to sub-optimal SB (RSH ≥ 2 cm) with respect to multiple SB variables. RESULTS 55 patients (mean age 15.1 years-old, 43 F, mean BMI 22, mean thoracic Cobb-49.8°) were included. Based on Lenke curve types, there were 13 patients with type 1A, 10 patients with 1B, 12 patients with 1C, 7 patients with 2A, 4 patients with 2B and 9 patients with type 3C. T1 tilt was significantly correlated with RSH, Clavicle angle difference (CAD), First Rib Angle (FRA), and UIV tilt at first erect, 1-year, and 2-year post-op radiographs (p < 0.05 for all). When comparing groups, A and B, Group A patients showed significantly better restoration of their 2-year SB parameters; RSH (6.8 vs 11.8 mm, p = 0.01), CAD (3.9 vs 9.1 p < 0.001) and T1 tilt (4.7 vs 7.8° p = 0.01). Similar results were found for patients with baseline right shoulder high; RSH (p = 0.04), CAD (p < 0.001) and T1 tilt (p < 0.001) and whether UIV was T2 or T3/T4. Eight patients with sub-optimal SB had worse intra-operative T1 tilt (p = 0.03) compared to 47 patients with optimal SB despite no difference in MT Cobb correction (83.1 vs 79.8%, p = 0.57). CONCLUSION Post-operative T1 tilt correlates with lateral shoulder parameters at first erect, 1 year, and 2-year radiographs. Therefore, T1 tilt can potentially be used as a surrogate to predict post-operative SB. Leveling intra-operative T1 tilt ≤5° is associated with better 2-year post-operative shoulder balance parameters irrespective of whether the UIV was T2 or T3/T4. Patients with sub-optimal SB at 2 years had worse final intra-operative T1 tilt despite similar percent correction of main thoracic curve for all patients.
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Affiliation(s)
- Subaraman Ramchandran
- Nicklaus Children's Hospital Sports Medicine and Spine Institute, Miami, FL, USA.
- Department of Orthopedic Surgery, Nicklaus Children's Hospital, Miami, FL, 33155, USA.
| | - Andrew Pierce
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Claire Callan
- Herbert Wertheim College of Medicine, Florida International University, Miami, FL, USA
| | - Taghi Ramzanian
- Nicklaus Children's Hospital Sports Medicine and Spine Institute, Miami, FL, USA
| | - Neil Mohile
- Department of Orthopedic Surgery, University of Miami Medical Center, Miami, FL, USA
| | | | - Thomas Errico
- Nicklaus Children's Hospital Sports Medicine and Spine Institute, Miami, FL, USA
| | - Stephen George
- Nicklaus Children's Hospital Sports Medicine and Spine Institute, Miami, FL, USA
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Hwang CJ, Lee HR, Lee SK, Seok SY, Cho JH, Lee DH, Lee CS. Does Sacral Slanting Affect Postoperative Shoulder Balance in Patients With Lenke Type 2A Adolescent Idiopathic Scoliosis? Neurospine 2024; 21:286-292. [PMID: 38317560 PMCID: PMC10992657 DOI: 10.14245/ns.2347072.536] [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: 10/16/2023] [Revised: 12/11/2023] [Accepted: 12/12/2023] [Indexed: 02/07/2024] Open
Abstract
OBJECTIVE Even minor sacral slanting can influence T1 tilt and shoulder balance. Yet, the relationship between sacral slanting and postoperative shoulder imbalance (PSI) has not been previously explored. To determine risk factors for PSI in Lenke 2A adolescent idiopathic scoliosis (AIS) patients, with an emphasis on sacral slanting. METHODS The study encompassed 96 consecutive patients who had undergone posterior correction and fusion surgery for Lenke type 2A AIS. Patients were grouped into PSI(+) and PSI(-) based on postoperative outcomes. Additionally, they were classified into left-sided slanting, no slanting, and right-sided slanting groups according to the degree of sacral slanting. Various radiological measures were compared. RESULTS Patients in the PSI(+) group exhibited a smaller preoperative proximal thoracic curve and a higher main thoracic curve correction rate than those in the PSI(-) group. The presence or absence of sacral slanting did not exhibit a significant variation in PSI occurrence. However, the right-sided sacral slanting group showed a larger delta radiologic shoulder height compared to the other 2 groups (7.1 mm vs. 1.5 & 3.3 mm). CONCLUSION Sacral slanting was not directly linked to the development of PSI. Despite the common postoperative elevation of the left shoulder, the shoulder height differences decreased over the follow-up period. Especially in cases with a right-sided tilted sacrum, the PSI demonstrated progressive improvement, with an associated increase in the rightward distal wedging angle, leading to distal adding-on.
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Affiliation(s)
- Chang Ju Hwang
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Hyung Rae Lee
- Department of Orthopedic Surgery, Korea University Anam Hospital, Seoul, Korea
| | - Suk Kyu Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Sang Yun Seok
- Department of Orthopedic Surgery, Daejeon Eulji Medical Center, Daejeon, Korea
| | - Jae Hwan Cho
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
| | - Dong-Ho Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Lee HR, Hwang CJ, Seok SY, Gwak HW, Cho JH, Lee DH, Lee CS. Can We Control Lateral Shoulder Balance Through Proximal Thoracic Curve Correction in Lenke Type 2 Adolescent Idiopathic Scoliosis? J Pediatr Orthop 2024; 44:28-36. [PMID: 37815292 DOI: 10.1097/bpo.0000000000002544] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/11/2023]
Abstract
BACKGROUND Proximal thoracic curve (PTC) correction has been considered to prevent lateral shoulder imbalance in Lenke Type 2 adolescent idiopathic scoliosis (AIS) patients; however, postoperative shoulder imbalance (PSI) commonly occurs despite these strategies with PTC correction. We investigated the hypothesis that PTC correction would not directly affect PSI in the majority of Lenke type 2 AIS cases. Furthermore, we investigated the risk factors for lateral PSI after corrective surgery. METHODS This study examined the records for AIS patients with Lenke type 2 who underwent corrective surgery and followed up for >2 years. Patients were categorized into PSI (-); radiologic shoulder height (RSH)<15 mm, and PSI (+); RSH≥15 mm. Repeated measures analysis of variance was performed at preoperatively, postoperatively, 1 month, and final follow-up. Postoperative lateral shoulder imbalance was predicted by the identification of univariate analysis and multivariate analysis. RESULTS Among the 151 patients reviewed, 29 (19.2%) showed PSI at final follow-up. Lateral shoulder balance parameters showed different directionalities between PSI (-) and (+) groups at postoperatively, 1 month, and final follow-up ( P <0.01 each). Preoperative PTC, middle thoracic curve (MTC) curve and MTC correction showed strong correlations with the RSH ( P =0.01, 0.03, and 0.04, respectively). However, PTC correction did not show a significant correlation with the RSH. Moreover, only a smaller MTC curve and larger MTC correction rate were related to lateral PSI in multivariate analysis. CONCLUSIONS In Lenke type 2 AIS curves, the MTC curve and its correction predominantly influence lateral shoulder imbalance after corrective surgery, irrespective of the PTC correction extent. Consequently, overemphasizing the correction of the PTC curve may not necessarily lead to an improved lateral shoulder balance. When MTC curve is smaller, surgeons should be more careful for MCT overcorrection leading to a lateral shoulder imbalance. LEVEL OF EVIDENCE Level III.
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Affiliation(s)
- Hyung Rae Lee
- Department of Orthopedic Surgery, Uijeongbu Eulji Medical Center, Uijeongbusi, Gyeonggido
| | - Chang Ju Hwang
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine
| | - Sang Yun Seok
- Department of Orthopedic Surgery, Daejeon Eulji Medical Center, Daejeon, Republic of Korea
| | | | - Jae Hwan Cho
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine
| | - Dong-Ho Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine
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Isogai N, Yagi M, Otomo N, Maeda Y, Suzuki S, Nori S, Tsuji O, Nagoshi N, Okada E, Fujita N, Nakamura M, Matsumoto M, Watanabe K. Upper End Vertebra of Proximal Thoracic Curve At T1 is a Novel Risk Factor of Postoperative Shoulder Imbalance in Lenke Type 2 Adolescent Idiopathic Scoliosis. Global Spine J 2023; 13:1223-1229. [PMID: 34121483 PMCID: PMC10416584 DOI: 10.1177/21925682211023049] [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: 11/15/2022] Open
Abstract
STUDY DESIGN Retrospective single-center study. OBJECTIVE We investigated the risk factors of postoperative shoulder imbalance (PSI) in patients with Lenke type 2 adolescent idiopathic scoliosis (AIS) including the position of preoperative upper end vertebra (UEV). METHODS Seventy-five patients with Lenke type 2 AIS who underwent posterior correction and fusion surgeries from 2008 to 2018 were included. We included only patients whose upper instrumented vertebrae were at T2. The patients were divided into 2 groups based on radiographic shoulder height (RSH) at final follow-up, namely PSI group and non-PSI group, and PSI was defined as RSH > 10 mm. UEV, RSH, Cobb angle, curve flexibility, T1 and T2 tilt, correction rate, Risser grade, Scoliosis Research Society-22 scores, and demographic data were compared between the groups using independent t-tests or chi-square tests. Variables with P value < 0.20 in univariate analysis were assessed in logistic regression analysis. RESULTS Thirty-four patients in the PSI group and 37 patients in the non-PSI group were analyzed. Univariate analysis revealed that there were more patients with UEV at T1 (PSI: 85%, non-PSI: 54%, P < 0.01) and Risser grade ≥ 3 (PSI: 88%, non-PSI: 62%; P < 0.05) in the PSI group than in the non-PSI group. Logistic regression analysis revealed that UEV at T1 (odds ratio [OR] = 4.1 [1.2-14.4], P < 0.05) and Risser grade ≥ 3 (OR = 3.9 [1.1-14.5], P < 0.05) are significantly associated with PSI. CONCLUSIONS UEV at T1 and Risser grade ≥ 3 at the time of surgery are significant risk factors of PSI.
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Affiliation(s)
- Norihiro Isogai
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Department of Orthopaedic Surgery, International University of Health and Welfare, Mita Hospital, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Mitsuru Yagi
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Nao Otomo
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Yoshihiro Maeda
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Satoshi Suzuki
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Satoshi Nori
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Osahiko Tsuji
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Narihito Nagoshi
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Eijiro Okada
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Nobuyuki Fujita
- Keio Spine Research Group, Tokyo, Japan
- Department of Orthopaedic Surgery, Fujita Health University, Aichi, Japan
| | - Masaya Nakamura
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Morio Matsumoto
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
| | - Kota Watanabe
- Department of Orthopaedic Surgery, Keio University School of Medicine, Tokyo, Japan
- Keio Spine Research Group, Tokyo, Japan
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Chan CYW, Ch’ng PY, Lee SY, Chung WH, Chiu CK, Kwan MK. Preoperative "Cervical Axis" Deviation Increases the Risk of Distal Adding-On Following Surgery in Lenke 1 and 2 Adolescent Idiopathic Scoliosis Patients. Global Spine J 2023; 13:443-450. [PMID: 33691529 PMCID: PMC9972263 DOI: 10.1177/2192568221998642] [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] [Indexed: 11/16/2022] Open
Abstract
STUDY DESIGN Retrospective. PURPOSE To evaluate the relationship between shoulder/ neck imbalance with distal adding-on phenomenon and to identify other risk factors in Lenke 1 and 2 (non-AR curves) adolescent idiopathic scoliosis (AIS) patients. METHODS 100 Lenke 1 and 2 AIS patients with lowest instrumented vertebra (LIV) cephalad to or at L1 were recruited. Medial shoulder/ neck balance was represented by T1-tilt and cervical axis (CA). Lateral shoulder balance was represented by clavicle angle (Cla-A) and radiographic shoulder height (RSH). Distal adding-on phenomenon was diagnosed when there was disc wedging below LIV of >5o at final follow-up. Predictive factors and odds ratio were derived using univariate and multivariate logistic regression analysis. RESULTS Mean age of this cohort was 15.9 ± 4.4 years. Mean follow-up duration was 30.9 ± 9.6 months. Distal adding-on phenomenon occurred in 19 patients (19.0%). Only Risser grade, preoperative CA and final follow-up lumbar Cobb angle were the independent factors. A positive preoperative CA deviation increased the odds of distal adding-on by 5.4 times (95% CI 1.34-21.51, P = 0.018). The mean immediate postoperative T1-tilt, CA, RSH and Cla-A were comparable between the group with distal adding-on and the group without. CONCLUSION Distal adding-on phenomenon occurred in 19.0% of patients. Preoperative "Cervical Axis" was an important factor and it increased the risk of distal adding-on by 5.4 times. Other significant predictive factors were Risser grade and lumbar Cobb angle at final follow-up. Immediate postoperative shoulder or neck imbalance was not a significant factor for postoperative distal adding-on phenomenon.
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Affiliation(s)
- Chris Yin Wei Chan
- Department of Orthopaedic Surgery
(NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Pei Ying Ch’ng
- Department of Orthopaedic Surgery
(NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Sin Ying Lee
- Department of Orthopaedic Surgery
(NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Weng Hong Chung
- Department of Orthopaedic Surgery
(NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Chee Kidd Chiu
- Department of Orthopaedic Surgery
(NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Mun Keong Kwan
- Department of Orthopaedic Surgery
(NOCERAL), Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia,Mun Keong Kwan, Department of Orthopaedic
Surgery, National Orthopedic Centre of Excellence for Research and Learning
(NOCERAL), Faculty of Medicine, University of Malaya, 50603 Kuala Lumpur,
Malaysia.
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Banno T, Yamato Y, Hasegawa T, Yoshida G, Arima H, Oe S, Mihara Y, Ide K, Watanabe Y, Kurosu K, Nakai K, Matsuyama Y. Preoperative Less Right Shoulder Elevation Had a Higher Risk of Postoperative Shoulder Imbalance When Main Thoracic Curve Shows Higher Correction Regardless of the Upper Instrumented Vertebra Level for Patients with Adolescent Idiopathic Scoliosis Lenke Type 1. Asian Spine J 2023; 17:166-175. [PMID: 36138576 PMCID: PMC9977976 DOI: 10.31616/asj.2022.0020] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 03/10/2022] [Indexed: 11/23/2022] Open
Abstract
STUDY DESIGN This is a retrospective study. PURPOSE This study aimed to investigate the incidence of and risk factors for postoperative shoulder imbalance (PSI) in patients with Lenke type 1. OVERVIEW OF LITERATURE PSI is a complication resulting in poor self-image and satisfaction in adolescent idiopathic scoliosis (AIS) patients. METHODS We examined the data of AIS patients with Lenke type 1 curves who underwent posterior fusion surgery in a retrospective manner. PSI was defined as a 2-year postoperative absolute radiographic shoulder height (RSH) of ≥2 cm. Patients were divided into two groups based on the presence of PSI and the level of their upper instrumented vertebra (UIV) (UIV at T2 or T3 [U-UIV] or UIV below T3 [L-UIV]). The radiographic parameters and clinical outcomes were compared, and the cutoff values of risk factors were identified by multivariate analysis. RESULTS Of 104 patients, 21 (20.2%) had left shoulder elevation PSI. The PSI group had a significantly greater preoperative RSH (-5.1 mm vs. -14.3 mm) and main thoracic (MT) curve correction rate (77.3% vs. 69.1%) than the non-PSI group. The PSI incidence did not differ between the U-UIV and L-UIV groups. Multivariate analysis identified preoperative RSH and the MT curve correction rate as independent risk factors for PSI. The receiver operating characteristic curve analysis identified the preoperative RSH cutoff value as -6.5 mm and MT curve correction rate cutoff value as 76.9%. CONCLUSIONS Even in AIS patients with Lenke type 1 curves, the incidence of PSI was relatively high (20.2%). Patients with preoperative lower right shoulder elevation (i.e., RSH >-6.5 mm) had a higher risk of PSI regardless of UIV level when the MT curve showed a higher correction rate (i.e., correction rate >76.9%).
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Affiliation(s)
- Tomohiro Banno
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yu Yamato
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Tomohiko Hasegawa
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Go Yoshida
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Hideyuki Arima
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Shin Oe
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yuki Mihara
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Koichiro Ide
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yuh Watanabe
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Kenta Kurosu
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Keiichi Nakai
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
| | - Yukihiro Matsuyama
- Department of Orthopaedic Surgery, Hamamatsu University School of Medicine, Hamamatsu, Japan
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Deng Z, Wang L, Wang L, Yang X, Wang L, Liu L, Song Y. Incidence and risk factors of postoperative medial shoulder imbalance in Lenke Type 2 adolescent idiopathic scoliosis with lateral shoulder balance. BMC Musculoskelet Disord 2022; 23:947. [PMID: 36324134 PMCID: PMC9628036 DOI: 10.1186/s12891-022-05882-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2022] [Accepted: 10/11/2022] [Indexed: 01/24/2023] Open
Abstract
BACKGROUND In clinical practice, there are a significant percentage of Lenke 2 AIS patients suffered from medial shoulder imbalance (MSI) despite achieving good lateral shoulder balance (LSB) following surgery. However, there are few studies evaluating the features of the medial shoulder. The objective of this study was to determine the incidence and independent risk factors of MSI with LSB after Lenke 2 AIS corrective surgery. METHODS One hundred and twenty Lenke 2 AIS patients with LSB at the last follow-up were reviewed from 2009 to 2018. Preoperative, and 3-month and the last postoperative follow-up radiographs were measured using a number of specific measurements. At the last follow-up, patients were divided into medial shoulder balance (MSB) group and the MSI group according to whether the T1 tilt was greater than 3°. A stepwise multiple linear regression analysis was used to examine the independent risk factors for MSI. Scoliosis Research Society (SRS)-30 questionnaire was used to assess clinical outcomes. RESULTS Up to 69.2% of patients suffered from MSI with LSB after Lenke Type 2 AIS corrective surgery. Multiple regression showed that postoperative upper instrumented vertebra tilt (UIVt), proximal thoracic curve (PTC), the ratio of PTC and main thoracic curves (PTC/MTC) and T2 vertebra rotation ratio (T2-VR) were significant predictors for MSI (UIVt: b = 0.398, p < 0.001; PTC/MTC: b = 2.085, p < 0.001; PTC: b = 0.155, p < 0.001; T2-VR: b = 3.536, p = 0.008; adjusted R2 = 0.711). 72 patients completed the SRS-30 questionnaire survey, and the MSB group were scored the higher (p ≤ 0.001) in self-image domain (4.18 ± 0.43 vs. 3.70 ± 0.35), satisfaction domain (4.39 ± 0.54 vs. 3.95 ± 0.46) and total average (4.31 ± 0.23 vs. 4.11 ± 0.19). CONCLUSION Although the patients with Lenke 2 AIS achieve LSB after corrective surgery, up to 69.2% of them suffered from MSI. Postoperative UIVt, PTC, PTC/MTC and T2-VR were significant predictors for MSI. Sufficient correction of these variables may facilitate the achievement of MSB.
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Affiliation(s)
- Zhipeng Deng
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
| | - Liang Wang
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
| | - Linnan Wang
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
| | - Xi Yang
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
| | - Lei Wang
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
| | - Limin Liu
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
| | - Yueming Song
- grid.412901.f0000 0004 1770 1022Department of Orthopedic Surgery and Orthopedic Research Institute, West China Hospital, Sichuan University, No. 37 Guo Xue Xiang, 610041 Chengdu, Sichuan China
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Sato T, Yonezawa I, Matsumoto H, Otomo N, Suzuki T, Manabe N, Demura S, Watanabe K, Saito T, Nohara A, Kurakawa T, Shimizu T, Uno K, Matsumoto M, Kawakami N. Surgical Predictors for Prevention of Postoperative Shoulder Imbalance in Lenke Type 2A Adolescent Idiopathic Scoliosis. Spine (Phila Pa 1976) 2022; 47:E132-E141. [PMID: 34075011 DOI: 10.1097/brs.0000000000004135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Multicenter, retrospective cohort study. OBJECTIVE The aim of this study was to investigate the occurrence and surgical predictors of postoperative shoulder imbalance (PSI) in Lenke type 2A adolescent idiopathic scoliosis (AIS). SUMMARY OF BACKGROUND DATA Although several studies have investigated the factors influencing PSI in Lenke type 2 curves, no studies have analyzed PSI-related factors considering upper instrumented vertebra (UIV) and lumbar modifier type simultaneously. METHODS Patients with Lenke Type 2A AIS treated by spinal fusion were retrospectively identified and their data were extracted from six spine centers in Japan. Inclusion criteria were age between 10 and 20 years at surgery, UIV = T2, major curve 40° to 90°, and follow-up for 24 to 30 months after surgery. We analyzed patient characteristics, surgical characteristics, and preoperative and immediate-postoperative radiographic parameters. We defined patients with lower instrumented vertebra (LIV) equal or proximal to the last touching vertebra (LTV) as selective thoracic fusion (STF-LTV) and patients with LIV distal to the LTV as non-STF-LTV. t Tests, Mann-Whitney U test, χ2 tests, Fisher exact tests, and multivariate logistic regression were used for statistical analyses. RESULTS Among the 99 consecutive patients with a mean follow-up of 25.6 months, PSI was seen in 27 (27.3%) patients immediately after and in 17 (17.2%) patients at 24 to 30 months. The univariate analysis revealed that the significant risk factors of PSI were preoperative radiographical shoulder height, non-STF-LTV, and high main thoracic curve (MTC) correction (immediate-postoperative MTC correction rate: ≥70%), with PSI incidence of 40.0%. The multivariate logistic regression analysis indicated that interaction term of non-STF-LTV and high MTC correction was an independent risk factor for PSI (non-STF-LTV and high MTC correction, odds ratio: 5.167, 95% confidence interval: 1.470-18.159, P = 0.010). CONCLUSION To prevent PSI in Lenke Type 2A AIS patients, surgeons should avoid the combination of non-STF-LTV and high MTC correction in those surgeries with UIV as T2.Level of Evidence: 4.
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Affiliation(s)
- Tatsuya Sato
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
| | - Ikuho Yonezawa
- Department of Orthopaedic Surgery, Juntendo University, Tokyo, Japan
- Department of Orthopaedic Surgery, Sangubashi Spine Surgery Hospital, Tokyo, Japan
| | - Hiroko Matsumoto
- Department of Orthopaedic Surgery, Columbia University Irving Medical Center, New York, NY
| | - Nao Otomo
- Department of Orthopaedic Surgery, Keio University, Tokyo, Japan
| | - Teppei Suzuki
- Department of Orthopaedic Surgery, Kobe Medical Center Kobe, Japan
| | - Nodoka Manabe
- Department of Orthopaedic Surgery, Gunma Spine Center, Takasaki, Japan
| | - Satoru Demura
- Department of Orthopaedic Surgery, Kanazawa University, Kanazawa, Japan
| | - Kota Watanabe
- Department of Orthopaedic Surgery, Keio University, Tokyo, Japan
| | - Toshiki Saito
- Department of Orthopaedic Surgery, Meijo Hospital, Nagoya, Japan
| | - Ayato Nohara
- Department of Orthopedic Surgery, JCHO Tokyo Shinjuku Medical Center, Tokyo, Japan
| | - Takuto Kurakawa
- Department of Orthopaedic Surgery, Kobe Medical Center Kobe, Japan
| | - Takachika Shimizu
- Department of Orthopaedic Surgery, Gunma Spine Center, Takasaki, Japan
| | - Koki Uno
- Department of Orthopaedic Surgery, Kobe Medical Center Kobe, Japan
| | - Morio Matsumoto
- Department of Orthopaedic Surgery, Keio University, Tokyo, Japan
| | - Noriaki Kawakami
- Department of Orthopaedic Surgery, Meijo Hospital, Nagoya, Japan
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Moorthy V, Goh GS, Guo CM, Tan SB, Chen JLT, Soh RCC. Risk Factors of Postoperative Shoulder Imbalance in Adolescent Idiopathic Scoliosis: The Role of Sagittal Spinopelvic Parameters and Upper Instrumented Vertebrae Selection. Clin Spine Surg 2022; 35:E137-E142. [PMID: 33657026 DOI: 10.1097/bsd.0000000000001153] [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: 08/02/2020] [Accepted: 11/07/2020] [Indexed: 11/26/2022]
Abstract
STUDY DESIGN This is a retrospective study. OBJECTIVE To determine (1) the independent risk factors of postoperative shoulder imbalance (PSI) after adolescent idiopathic scoliosis (AIS) correction surgery; and (2) whether the level of upper instrumented vertebrae (UIV) affects postoperative shoulder balance. SUMMARY OF BACKGROUND DATA PSI is an important outcome of AIS correction surgery as it influences a patient's appearance and satisfaction. However, risk factors for PSI remain controversial and there are currently no studies evaluating the effect of sagittal spinopelvic parameters on PSI. Previous studies on the relationship between the level of UIV and PSI have also reported conflicting results. MATERIALS AND METHODS Sixty-nine AIS patients undergoing correction surgery at a single institution were retrospectively reviewed. Radiographic parameters were measured on anteroposterior and lateral x-rays preoperatively, immediate postoperatively, and 12 months postoperatively. At 1 year follow-up, patients were divided into 2 groups based on their radiographic shoulder height (RSH): (1) PSI group (RSH ≥20 mm) and (2) non-PSI group (RSH <20 mm). RESULTS On multivariate regression analysis, a lower postoperative main thoracic curve (MTC) [odds ratio (OR): 0.702, 95% confidence interval (CI): 0.519-0.949, P=0.022], greater percentage correction of MTC (OR: 1.526, 95% CI: 1.049-2.220, P=0.027) and higher postoperative sacral slope (OR: 1.364, 95% CI: 1.014-1.834, P=0.040) were identified as independent risk factors of PSI. When preoperative, postoperative, and absolute change in shoulder parameters were compared across the level of UIV, no significant differences were found regardless of the radiographic shoulder parameter analyzed. CONCLUSIONS Lower postoperative MTC, greater percentage correction of MTC and higher postoperative sacral slope were independent risk factors of PSI. Shoulder balance and symmetry were not affected by the level of UIV selected. Relative curve correction is a more important consideration than UIV to avoid PSI after AIS correction surgery. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Vikaesh Moorthy
- Yong Loo Lin School of Medicine, National University Singapore
| | - Graham S Goh
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
| | - Chang-Ming Guo
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
| | - Seang-Beng Tan
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
| | - John Li-Tat Chen
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
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Moorthy V, Goh GS, Guo CM, Tan SB, Chen JLT, Soh RCC. Shoulder Balance Following Correction Surgery for Adolescent Idiopathic Scoliosis: When Is It Achieved and Does the Type of Construct Matter? Clin Spine Surg 2022; 35:E175-E180. [PMID: 34379376 DOI: 10.1097/bsd.0000000000001154] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2020] [Accepted: 12/22/2020] [Indexed: 11/26/2022]
Abstract
STUDY DESIGN This is a retrospective study. OBJECTIVE This study aims to determine (1) when shoulder rebalancing occurs after adolescent idiopathic scoliosis (AIS) correction surgery and (2) whether shoulder asymmetry was influenced by the use of pedicle screws or hooks. SUMMARY OF BACKGROUND DATA Postoperative shoulder imbalance is an important outcome of AIS correction surgery as it may influence a patient's appearance and satisfaction. MATERIALS AND METHODS Seventy AIS patients undergoing AIS correction surgery at a single institution were retrospectively reviewed. Radiographic parameters were measured from anteroposterior x-rays at preoperative, immediate postoperative, 6 months postsurgery, and 12 months postsurgery. Shoulder parameters measured were: radiographic shoulder height (RSH), clavicle angle, coracoid height difference (CHD), and T1 tilt. The Cobb angle of the proximal thoracic curve, major thoracic curve, and thoracolumbar/lumbar curve. The percentage of correction was also calculated. RESULTS Lateral shoulder asymmetry (RSH and CHD) changed significantly from preoperative to up to 6 months postsurgery. T1 tilt, a measure of medial shoulder asymmetry, did not change significantly. Postoperatively, the hook group attained significantly better shoulder balance than the screw group in terms of RSH and CHD up to 12 months postsurgery. However, the percentage correction of the major thoracic curve was significantly greater in the screw group than the hook group (hook: 62.2±18.4% vs. screw: 76.0±16.0%, P=0.007). CONCLUSIONS Lateral shoulder rebalancing occurs up to 6 months after surgery. While thoracic pedicle screws offer greater correction of major AIS curves, hook constructs offer better postoperative shoulder symmetry. LEVEL OF EVIDENCE III.
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Affiliation(s)
- Vikaesh Moorthy
- Yong Loo Lin School of Medicine, National University Singapore
| | - Graham S Goh
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
| | - Chang-Ming Guo
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
| | - Seang-Beng Tan
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
| | - John Li-Tat Chen
- Department of Orthopaedic Surgery, Singapore General Hospital, Singapore, Singapore
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Yuan S, Fan N, Hai Y, Wu Q, Du P, Zang L. What is the impact of scoliotic correction on postoperative shoulder imbalance in severe and rigid scoliosis. BMC Musculoskelet Disord 2021; 22:868. [PMID: 34641852 PMCID: PMC8513330 DOI: 10.1186/s12891-021-04763-y] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2021] [Accepted: 10/06/2021] [Indexed: 11/18/2022] Open
Abstract
Background Although recent studies have investigated the risk factors for PSI, few studies have focused on the impact of scoliotic correction on postoperative shoulder imbalance (PSI), especially in severe and rigid scoliosis (SRS). The purpose of the study was to study the effect of scoliotic correction on PSI in SRS. Methods The preoperative, postoperative, and minimum 2-year follow-up radiographs of 48 consecutive patients with SRS who underwent posterior spinal fusion surgery were evaluated. We regarded radiographic shoulder height (RSH) as a shoulder balance parameter and divided the patients into improved and aggravated groups of PSI from pre- to post-operation and from post-operation to last follow-up, respectively. In addition, patients were divided into nine groups based on the observed changes in PSI after surgery and at follow-up, and the correction rate ratios were calculated among the groups. Independent samples T test and Chi-squared test were performed between the improved and aggravated groups of PSI. Results After surgery, the proximal thoracic curve (PTC) flexibility (P = 0.040), correction rate of the main thoracic curve (MTC) (P = 0.010), and Cobb angle of the lumbar curve (LC) (P = 0.037) were significantly higher, while the ratio of the correction rate of the PTC to the MTC (P = 0.042) was smaller in the aggravated group. At follow-up, the improved group had significantly larger PTC flexibility (P = 0.006), larger ratio of the correction rate of PTC to MTC (P = 0.046), a larger ratio correction rate of PTC to LC (P = 0.027), and a smaller correction rate of LC (P = 0.030). The correction rate ratios of the groups after surgery were as follows: negative to negative (N-N) (1.08) > negative to balance (N-B) (0.96) > negative to positive (N-P) (0.67), B-N (1.26) > B-B (0.94) > B-P (0.89), and P-N (0.34) > P-P (0.83). The order of the correction rate ratio at follow-up was as follows: N-N (0.96) > N-B (0.51), B-B (0.97) > B-P (0.90), and P-B (0.87) > P-P (0.84). Conclusion Harmonizing the correction rate ratio of the PTC, MTC, and LC should be recommended for intraoperative correction and postoperative compensation of PSI. In addition, greater PTC flexibility plays an important role in the spontaneous correction and compensation of PSI in SRS.
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Affiliation(s)
- Shuo Yuan
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Ning Fan
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Yong Hai
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Qichao Wu
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Peng Du
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China
| | - Lei Zang
- Department of Orthopedics, Beijing Chaoyang Hospital, Capital Medical University, Beijing, China.
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Lee CS, Park S, Lee DH, Hwang CJ, Cho JH, Park JW, Park KB. Is the Combination of Convex Compression for the Proximal Thoracic Curve and Concave Distraction for the Main Thoracic Curve Using Separate-rod Derotation Effective for Correcting Shoulder Balance and Thoracic Kyphosis? Clin Orthop Relat Res 2021; 479:1347-1356. [PMID: 33471482 PMCID: PMC8133207 DOI: 10.1097/corr.0000000000001643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Accepted: 12/21/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND Posterior correction of the proximal thoracic curve in patients with adolescent idiopathic scoliosis has been recommended to achieve shoulder balance. However, finding a good surgical method is challenging because of the small pedicle diameters on the concave side of the proximal thoracic curve. If the shoulder height can be corrected using screws on the convex side, this would appear to be a more feasible approach. QUESTIONS/PURPOSES In patients with adolescent idiopathic scoliosis, we asked: (1) Is convex compression with separate-rod derotation effective for correcting the proximal thoracic curve, shoulder balance, and thoracic kyphosis? (2) Which vertebrum is most appropriate to serve as the uppermost-instrumented vertebra? (3) Is correction of the proximal thoracic curve related to the postoperative shoulder balance? METHODS Between 2015 and 2017, we treated 672 patients with scoliosis. Of those, we considered patients with elevated left shoulder, Lenke Type 2 or 4, or King Type V idiopathic scoliosis as potentially eligible. Based on that, 17% (111 of 672) were eligible; 5% (6 of 111) were excluded because of other previous operations and left-side main thoracic curve, 22% (24 of 111) were excluded because they did not undergo surgery for the proximal thoracic curve with only pedicle screws, 21% (23 of 111) were excluded because the proximal thoracic curve was not corrected by convex compression and separate rod derotation, and another 3% (3 of 111) were lost before the minimum study follow-up of 2 years, leaving 50% (55 of 111) for analysis. During the study period, we generally chose T2 as the uppermost level instrumented when the apex was above T4, or T3 when the apex was T5. Apart from the uppermost-instrumented level, the groups did not differ in measurable ways such as age, sex, Cobb angles of proximal and main thoracic curves, and T1 tilt. However, shoulder balance was better in the T3 group preoperatively. The median (range) age at the time of surgery was 15 years (12 to 19 years). The median follow-up duration was 26 months (24 to 52 months). Whole-spine standing posteroanterior and lateral views were used to evaluate the improvement of radiologic parameters at the most recent follow-up and to compare the radiologic parameters between the uppermost-instrumented T2 (37 patients) and T3 (18 patients) vertebra groups. Finally, we analyzed radiologic factors related to shoulder balance, defined as the difference between the horizontal lines passing both superolateral tips of the clavicles (right-shoulder-up was positive), at the most recent follow-up. RESULTS Convex compression with separate-rod derotation effectively corrected the proximal thoracic curve (41° ± 11° versus 17° ± 10°, mean difference 25° [95% CI 22° to 27°]; p < 0.001), and the most recent shoulder balance changed to right-shoulder-down compared with preoperative right-shoulder-up (8 ± 11 mm versus -8 ± 10 mm, mean difference 16 mm [95% CI 12 to 19]; p < 0.001). Proximal thoracic kyphosis decreased (13° ± 7° versus 11° ± 6°, mean difference 2° [95% CI 0° to 3°]; p = 0.02), while mid-thoracic kyphosis increased (12° ± 8° versus 18° ± 6°, mean difference -7° [95% CI -9° to -4°]; p < 0.001). Preoperative radiographic parameters did not differ between the groups, except for shoulder balance, which tended to be more right-shoulder-up in the T2 group (11 ± 10 mm versus 1 ± 11 mm, mean difference 10 mm [95% CI 4 to 16]; p = 0.002). At the most recent follow-up, the correction proportion of the proximal thoracic curve was better in the T2 group than the T3 group (67% ± 10% versus 49% ± 22%, mean difference 19% [95% CI 8% to 30%]; p < 0.001). In the T2 group, T1 tilt (6° ± 4° versus 6° ± 4°, mean difference 1° [95% CI 0° to 2°]; p = 0.045) and shoulder balance (-14 ± 11 mm versus -7 ± 9 mm, mean difference -7 mm [95% CI -11 to -3]; p = 0.002) at the most recent follow-up improved compared with those at the first erect radiograph. The most recent shoulder balance was correlated with the correction proportion of the proximal thoracic curve (r = 0.29 [95% CI 0.02 to 0.34]; p = 0.03) and change in T1 tilt (r = 0.35 [95% CI 0.20 to 1.31]; p = 0.009). CONCLUSION Using the combination of convex compression and concave distraction with separate-rod derotation is an effective method to correct proximal and main thoracic curves, with reliable achievement of postoperative thoracic kyphosis and shoulder balance. T2 was a more appropriate uppermost-instrumented vertebra than T3, providing better correction of the proximal thoracic curve and T1 tilt. Additionally, spontaneous improvement in T1 tilt and shoulder balance is expected with upper-instrumented T2 vertebrae. Preoperatively, surgeons should evaluate shoulder balance because right-shoulder-down can occur after surgery in patients with a proximal thoracic curve. LEVEL OF EVIDENCE Level III, therapeutic study.
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Affiliation(s)
- Choon Sung Lee
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Sehan Park
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Dong-Ho Lee
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Chang Ju Hwang
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Hwan Cho
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Jae Woo Park
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
| | - Kun-Bo Park
- C. S. Lee, D.-H. Lee, C. J. Hwang, J. H. Cho, J. W. Park, Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
- S. Park, Department of Orthopedic Surgery, Dongguk University Ilsan Hospital, Goyangsi, Gyeonggido, Korea
- K.-B. Park, Division of Pediatric Orthopedic Surgery, Severance Children’s Hospital, Yonsei University College of Medicine, Seoul, Korea
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Liu Z, Liu T, Hai Y, Wu L, Hai JJ, Gao K, Guo X, Yang H, Kang N, Zhao F. Evaluation of changes in shoulder balance and prediction of final shoulder imbalance during growing-rod treatment for early-onset scoliosis. BMC Musculoskelet Disord 2021; 22:354. [PMID: 33853576 PMCID: PMC8045187 DOI: 10.1186/s12891-021-04221-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 03/30/2021] [Indexed: 01/30/2023] Open
Abstract
Background Obtaining and maintaining final shoulder balance after the entire treatment course is essential for early-onset scoliosis (EOS) patients. The relatively small number of growing-rod (GR) graduates who complete final fusion has resulted in an overall paucity of research on the GR treatment of EOS and a lack of research on the shoulder balance of EOS patients during GR treatment. Methods Twenty-four consecutive patients who underwent GR treatment until final fusion were included. Radiographic shoulder balance parameters, including the radiographic shoulder height (RSH), clavicle angle (CA), and T1 tilt angle (T1T), before and after each step of the entire treatment were measured. Shoulder balance changes from GR implantation to the last follow-up after final fusion were depicted and analysed. Demographic data, surgical-related factors, and radiographic parameters were analysed to identify risk factors for final shoulder imbalance. The shoulder balance of patients at different time points was further analysed to explore the potential effect of the series of GR treatment steps on shoulder balance. Results The RSH showed substantial improvement after GR implantation (P = 0.036), during the follow-up period after final fusion (P = 0.021) and throughout the entire treatment (P = 0.011). The trend of change in the CA was similar to that of the RSH, and the T1T improved immediately after GR implantation (P = 0.037). Further analysis indicated that patients with shoulder imbalance before final fusion showed significantly improved shoulder balance after fusion (P = 0.045), and their RSH values at early postfusion and the final follow-up did not show statistically significant differences from those in the prefusion shoulder balance group (P > 0.05). Early postfusion shoulder imbalance (odds ratio (OR): 19.500; 95% confidence interval (CI) = 1.777–213.949; P = 0.015) was identified as an independent risk factor for final shoulder imbalance. Conclusions Shoulder balance could be improved by GR implantation but often changes during the multistep lengthening process, and the final result is relatively unpredictable. Final fusion could further adjust the prefusion shoulder imbalance. Focusing on the prefusion shoulder balance of GR graduates and providing patients with early shoulder balance after fusion might be necessary. Supplementary Information The online version contains supplementary material available at 10.1186/s12891-021-04221-9.
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Affiliation(s)
- Ziyang Liu
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Gongti North Rd, No. 8, Beijing, 100020, China
| | - Tie Liu
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Gongti North Rd, No. 8, Beijing, 100020, China
| | - Yong Hai
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Gongti North Rd, No. 8, Beijing, 100020, China.
| | - Lingyun Wu
- Karolinska Institutet, Stockholm, Sweden
| | | | - Kang Gao
- Capital Medical University, Beijing, China
| | - Xuanrong Guo
- University of Wisconsin Madison, Madison, WI, USA
| | - Honghao Yang
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Gongti North Rd, No. 8, Beijing, 100020, China
| | - Nan Kang
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Gongti North Rd, No. 8, Beijing, 100020, China
| | - Fan Zhao
- Department of Orthopedic Surgery, Beijing Chaoyang Hospital, Capital Medical University, Gongti North Rd, No. 8, Beijing, 100020, China
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Bram JT, Mehta N, Flynn JM, Anari JB, Baldwin KD, Yaszay B, Pahys JM, Cahill PJ. Sinister! The high pre-op left shoulder is less likely to be radiographically balanced at 2 years post-op. Spine Deform 2021; 9:451-460. [PMID: 33201494 DOI: 10.1007/s43390-020-00236-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 10/19/2020] [Indexed: 11/26/2022]
Abstract
PURPOSE AIS patients consider shoulder balance an important cosmetic outcome after surgery. We examined the impact of preoperative left shoulder elevation (LSE) and choice of upper instrumented vertebra (UIV) on postoperative shoulder imbalance (PostSI). METHODS This was a retrospective cohort study utilizing a prospective AIS database. Patients had Lenke type 1-4 curves and preoperative shoulder height ≥ 1.0 cm. Patients with preoperative LSE and right shoulder elevation (RSE) were compared. Shoulder height difference < 1 cm was considered 'mild', 1-2 cm was 'moderate', and ≥ 2.0 cm was 'severe'. RESULTS 407 patients had ≥ 1.0 cm imbalance preoperatively, with 88 (21.6%) LSE. There were no differences in gender (p = 0.855) or age (p = 0.477). Patients with LSE more frequently had Lenke type 2 curves (43.2% vs 16.3%, p < 0.001), while preoperative RSE averaged 1.9 ± 0.9 cm versus 1.6 ± 0.5 cm for LSE (p < 0.001). Those with LSE more often had severe PostSI at 2 years (30.7% vs 5.0%, p < 0.001), and only 26.1% of patients with severe preoperative LSE corrected to mild. In contrast, most patients with RSE had mild PostSI regardless of initial imbalance. When examining only LSE patients, there was no difference in preoperative SH by final UIV (p = 0.101). Further, UIV choice did not impact the proportion of severely unbalanced patients postoperatively (p = 0.446). A PTC > 34.5° was predictive of PostSI ≥ 2.0 cm for patients with preoperative LSE. CONCLUSION AIS patients with preoperative LSE are less likely to achieve level shoulders postoperatively. Choice of higher UIV did not affect postoperative shoulder imbalance in this cohort. A PTC > 34.5° was predictive of severe PostSI in patients with preoperative LSE. LEVEL OF EVIDENCE II.
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Affiliation(s)
- Joshua T Bram
- The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
| | - Nishank Mehta
- The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
| | - John M Flynn
- The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
| | - Jason B Anari
- The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
| | - Keith D Baldwin
- The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA
| | - Burt Yaszay
- Rady Children's Hospital-San Diego, San Diego, CA, USA
| | - Joshua M Pahys
- Shriners Hospitals for Children-Philadelphia, Philadelphia, PA, USA
| | - Patrick J Cahill
- The Children's Hospital of Philadelphia, Philadelphia, PA, 19104, USA.
- Robert M. Campbell Jr. Endowed Chair in Thoracic Insufficiency Syndrome, The Children's Hospital of Philadelphia, University of Pennsylvania School of Medicine, Wood Building, 2nd floor, 34th Street and Civic Center Blvd., Philadelphia, PA, 19104, USA.
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Berlin C, Quante M, Freifrau von Richthofen E, Halm H. Analysis of Preoperative and Operative Factors Influencing Postoperative Shoulder Imbalance in Lenke Type 1 Adolescent Idiopathic Scoliosis. ZEITSCHRIFT FUR ORTHOPADIE UND UNFALLCHIRURGIE 2021; 160:307-316. [PMID: 33601462 DOI: 10.1055/a-1337-3435] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
BACKGROUND Postoperative shoulder imbalance is a common complication in adolescent idiopathic scoliosis and may impair patient satisfaction. The little data in the literature on the prediction and treatment of postoperative shoulder imbalance is incongruous. According to some studies, postoperative shoulder imbalance depends on the superior instrumented vertebral bodies, skeletal maturity, extent of correction and flexibility of the major curve. QUESTION Can preoperative radiological parameters from X-ray and traction films as well as correction of the curves be used to identify a factor impacting on postoperative shoulder imbalance? MATERIAL AND METHODS Prospective data in adolescent idiopathic scoliosis with thoracic curve (Lenke type 1), operated on between 2015 and 2018 at a scoliosis centre, were analysed retrospectively based on full-length X-rays of the spine (pre-/postOP and follow-up (FU)) and preoperative-traction films: age; correction of proximal, main and lumbar curve; shoulder height [mm]; clavicle angle [°]; T1 tilt [°]; coronal plumb line deviation [mm]. The findings were expressed as means with standard deviation. Changes in parameters over time (postOP-FU) were compared by t test (significance level α = 0.05). The correlation between preOP parameters and extent of correction with postoperative shoulder imbalance (≥ 15 mm) was determined by Pearson correlation and regression classification analysis. OUTCOMES 55 patients with adolescent idiopathic scoliosis, mean age of 15 ± 1.4 years. The FU-rate after a mean of 15 months was 80% (n = 44). Correction of proximal, main and lumbar curve: 47.0%, 75.8% and 68.8%, respectively, without statistically significant change (Δ) in FU (p > 0.05). Shoulder height was - 11.0 ± 12.7 mm (preOP), 15.5 ± 13.4 mm (postOP), 10.1 ± 10.6 mm (FU) (p < 0.05). 38% of those with adolescent idiopathic scoliosis had preOP right shoulder elevation; 55% (postOP) and 32% (FU) respectively had postoperative shoulder imbalance (left shoulder elevation). Strong statistical correlation was found for Δshoulder position (FU-preOP) with pre-OP shoulder position (r = - 0.7), and Δshoulder position (pre-OP traction films) (r = 0.5) with pre-OP clavicle angle (r = - 0.5). On regression classification analysis, 81.8% of cases did display postoperative shoulder imbalance if proximal curve correction was ≤ 64.4%; main and lumbar curve correction, Δshoulder elevation (preOP traction films) played a secondary role. DISCUSSION One common complication even in Lenke type 1 adolescent idiopathic scoliosis is postoperative shoulder imbalance. Preoperative planning should include traction films, preoperative shoulder position and clavicle angle to avoid postoperative shoulder imbalance. Moderate correction of proximal curve is critical for postoperative shoulder balance.
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Affiliation(s)
- Clara Berlin
- Department of Spinal Surgery with Scoliosis Centre, Schön Klinik Neustadt, Neustadt in Holstein, Germany
| | - Markus Quante
- Department of Spinal Surgery with Scoliosis Centre, Schön Klinik Neustadt, Neustadt in Holstein, Germany
| | | | - Henry Halm
- Department of Spinal Surgery with Scoliosis Centre, Schön Klinik Neustadt, Neustadt in Holstein, Germany
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Rüwald JM, Upenieks J, Ositis J, Pycha A, Avidan Y, Rüwald AL, Eymael RL, Schildberg FA. Pediatric Scoliosis Surgery-A Comprehensive Analysis of Treatment-Specific Variables and Trends in Latvia. MEDICINA (KAUNAS, LITHUANIA) 2020; 56:E201. [PMID: 32344764 PMCID: PMC7230999 DOI: 10.3390/medicina56040201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 04/20/2020] [Accepted: 04/21/2020] [Indexed: 12/02/2022]
Abstract
Background and Objectives: There are currently no data available regarding pediatric scoliosis surgery in Latvia. The aim of this article is to present treatment specific variables, investigate their interrelation, and identify predictors for the length of stay after surgical pediatric scoliosis correction. Materials and Methods: This retrospective study included all surgical pediatric scoliosis corrections in Latvia for the years 2012 to 2016. Analyzed parameters were chosen to portray the patients' demographics, pathology, as well as treatment specific variables. Descriptive, inferential, and linear regression statistics were calculated. Results: A total of 69 cases, 74% female and 26% male, were identified. The diagnostic subgroups consisted of 62% idiopathic (IDI) and 38% non-idiopathic (non-IDI) scoliosis cases. Non-IDI cases had significantly increased operation time, hospital stay, Cobb angle before surgery, and instrumented levels, while IDI cases showed significantly higher Cobb angle percentage correction. For all operated cases, the operation time and the hospital stay decreased significantly over the investigated time period. Early post-operative complications (PCs) occurred in 15.9% of the cases and were associated with increased hospital stay, instrumented levels, and Cobb angle before surgery. The linear regression analysis revealed that operation time and the presence of PCs were significant predictors for the length of the hospital stay. Conclusions: This is the first study to provide comprehensive insight into pediatric scoliosis surgery since its establishment in Latvia. Our regression model offers clinically applicable predictors and further underlines the significance of the operation length on the hospital stay. These results build the foundation for international comparison and facilitate improvement in the field.
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Affiliation(s)
- Julian M. Rüwald
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, 53127 Bonn, Germany
| | - Janis Upenieks
- Department of Pediatric Surgery, University Children’s Hospital, 1004 Riga, Latvia
- Department of Pediatric Surgery, Riga Stradins University, 1007 Riga, Latvia
| | - Janis Ositis
- Department of Pediatric Surgery, University Children’s Hospital, 1004 Riga, Latvia
- Department of Spine Surgery, North Kurzeme Regional Hospital, 3601 Ventspils, Latvia
| | - Alexander Pycha
- Cantonal Psychiatric Hospital of Lucerne, 6000 Lucerne, Switzerland
| | - Yuval Avidan
- Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center, 3436212 Haifa, Israel
| | - Anna L. Rüwald
- Department of Anesthesiology and Operative Intensive Care Medicine, Charité–Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, 13353 Berlin, Germany
| | - Robin L. Eymael
- Medical Faculty, University Hospital Essen, University Duisburg-Essen, 45147 Essen, Germany
| | - Frank A. Schildberg
- Clinic for Orthopedics and Trauma Surgery, University Hospital Bonn, 53127 Bonn, Germany
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Conformity and Changes in the Radiological Neck and Shoulder Balance Parameters Throughout 3-Year Follow-up Period: Do They Remain the Same? Spine (Phila Pa 1976) 2020; 45:E319-E328. [PMID: 31593064 DOI: 10.1097/brs.0000000000003275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
STUDY DESIGN Retrospective study. OBJECTIVE The primary objective of this study was to assess the conformity of the radiological neck and shoulder balance parameters throughout a follow-up period of more than 2 years. SUMMARY OF BACKGROUND DATA Postoperative shoulder and neck imbalance are undesirable features among Adolescent Idiopathic Scoliosis patients who underwent Posterior Spinal Fusion. There are many clinical and radiological parameters used to assess this clinical outcome. However, we do not know whether these radiological parameters conform throughout the entire follow-up period. METHODS This was a retrospective study done in a single academic institution. Inclusion criteria were patients with scoliosis who underwent posterior instrumented spinal fusion with pedicle screw fixation and attended all scheduled follow-ups for at least 24 months postoperatively. Radiological shoulder parameters were measured from both preoperative antero-posterior and postoperative antero-posterior radiographs. Lateral shoulder parameters were: Radiographic Shoulder Height, Clavicle Angle (Cla-A), Clavicle-Rib Intersection Difference, and Coracoid Height Difference. Medial shoulder and neck parameters were: T1 Tilt and Cervical Axis (CA). RESULTS The radiographs of 50 patients who had surgery done from November 2013 to November 2015 were analyzed. Mean age of this cohort was 16.3 ± 7.0 years. There were 38 (76%) female patients and 12 (24%) male patients. Mean final follow-up was 38.6 ± 5.8 months. When conformity assessment of the radiological parameter using the interclass coefficient correlation was done, we found that all parameters had significant correlation (P < 0.05). T1 tilt (0.78) had good reliability, CA (0.47), Clavicle-Rib Intersection Difference (0.43), and Coracoid Height Difference (0.40) had moderate reliability and Radiographic Shoulder Height (0.22) and Cla-A (0.13) had poor reliability. CONCLUSION All the radiological shoulder and neck balance parameters studied were conformed and suitable to be used to assess the patient postoperatively. Amongst these radiological parameters, T1 tilt followed by CA recorded to be the most reliable parameters over time. LEVEL OF EVIDENCE 4.
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Bivertebral autostable claws for the proximal fixation in thoracic adolescent idiopathic scoliosis surgery. Spine Deform 2020; 8:77-84. [PMID: 31950478 DOI: 10.1007/s43390-020-00040-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2019] [Accepted: 05/19/2019] [Indexed: 10/25/2022]
Abstract
STUDY DESIGN Retrospective monocentric study. OBJECTIVES To report radiologic outcomes of a consecutive series of AIS patients, operated with a bivertebral autostable claw for the upper instrumentation over a 5-year period. The upper fixation represents the weakest part of long constructs because of local anatomy and the high pull-out forces. Various implants have been proposed, but proximal junctional failures (PJF) and shoulder imbalance still occur with variable incidence. The autostable claw is a new implant, safe, and low profile, combining the mechanical strength of hooks with the initial stability of pedicle screws. METHODS All AIS patients operated between January 2010 and July 2015 for a Lenke 1 or 2 curve with the bivertebral autostable claw were included. A minimum 2-year follow-up was required. Full-spine biplanar stereoradiographs were performed preoperatively, within 8 weeks postoperative and at latest examination. Local and global sagittal and coronal parameters were analyzed and complications were reported. RESULTS 237 patients (191 Lenke 1 and 46 Lenke 2) were included, with a mean follow-up of 4.1 ± 0.6 years. PJF occurred in 2 patients (0.8%), and radiologic PJKs were observed in 8.4% of the series. Shoulder balance was efficiently restored or maintained in 88.2%. CONCLUSIONS The bivertebral autostable claw is a safe and robust alternative to pedicle screws for proximal fixation in AIS long constructs. Compression and/or distraction can be applied to level shoulders, and mechanical failures remain rare at 4-year follow-up. LEVEL OF EVIDENCE IV.
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Li Y, Bai H, Liu C, Zhao Y, Feng Y, Li T, Wang X, Zhang Y, Lei W, Zhao X, Wu Z. Distal Adding-On Phenomenon in Lenke IA and Lenke IIA: Risk Analysis and Selection of the Lowest Instrumented Vertebra. World Neurosurg 2019; 136:e171-e180. [PMID: 31884123 DOI: 10.1016/j.wneu.2019.12.087] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Accepted: 12/15/2019] [Indexed: 11/19/2022]
Abstract
OBJECTIVE To analyze the risks of the distal adding-on phenomenon and identify the ideal lowest instrumented vertebra (LIV) for Lenke IA and IIA. METHODS A total of 84 patients with Lenke IA or Lenke IIA treated with posterior all-pedicle-screw instrumentation were enrolled in this cohort study. Radiographs that were obtained before, immediately after, and 2 years after the operation were measured. Patients were grouped based on the occurrence of the adding-on phenomenon. Independent risk factors were evaluated between these 2 groups via univariate analysis and logistic regression analysis. RESULTS All patients obtained optimal correction of the main thoracic curve and lumbar curve after selective thoracic fusion. Eighteen patients among a total of 84 patients suffered from the distal adding-on phenomenon during the 2-year follow-up. Multivariable analysis revealed that the primary factors were preoperative thoracolumbar or lumbar curve size in supine side-bending films (odds ratio 0.75, P = 0.008), preoperative thoracic kyphosis (T5-T12) (odds ratio 0.743, P = 0.022), and the difference between the LIV and the LSTV (lowest substantial touched vertebra). All 7 (100%) patients whose LIVs were proximal to the LSTV suffered from distal adding-on phenomenon, whereas 7 of 40 (17.5%) suffered from distal adding-on phenomenon when the LIV was distal to the LSTV. Patients whose LIV was distal to the LSTV had the lowest incidence of the distal adding-on phenomenon (10.8%). CONCLUSIONS An LIV located proximal to the LSTV should be avoided during selective thoracic fusion for Lenke IA and IIA to prevent the distal adding-on phenomenon. For patients who have a small thoracolumbar or lumbar curve size in bending films or a small T5-T12 angle before surgery, the next vertebra distal to the LSTV may be an optimal choice.
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Affiliation(s)
- Yaobin Li
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Hao Bai
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Chenxin Liu
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Yan Zhao
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Yafei Feng
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Tianqing Li
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Xingli Wang
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Yang Zhang
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Wei Lei
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Xiong Zhao
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China
| | - Zixiang Wu
- Institute of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an, Shanxi Province, P. R. China.
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Postoperative shoulder imbalance in adolescent idiopathic scoliosis: risk factors and predictive index. 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; 28:1331-1341. [DOI: 10.1007/s00586-019-05933-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 02/01/2019] [Accepted: 02/26/2019] [Indexed: 10/27/2022]
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Prevalence, Risk Factors, and Characteristics of the "Adding-On" Phenomenon in Idiopathic Scoliosis After Correction Surgery: A Systematic Review and Meta-Analysis. Spine (Phila Pa 1976) 2018; 43:780-790. [PMID: 28937532 DOI: 10.1097/brs.0000000000002423] [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: 02/01/2023]
Abstract
STUDY DESIGN A systematic review and meta-analysis. OBJECTIVE To discuss the prevalence, risk factors, and characteristics of the "adding-on" phenomenon in idiopathic scoliosis (IS). SUMMARY OF BACKGROUND DATA There are controversies on the prevalence and risk factors of the "adding-on" phenomenon. In addition, there is no comprehensive study to describe the characteristics of "adding-on" in IS patients. METHODS We performed a systematic online search using PubMed, EMBASE, Web of Science, the Cochrane Library, and China WeiPu Library to identify eligible studies. Effect size (ES), odds ratios (OR), and weight mean difference (WMD) with 95% confidence interval (CI) were used to evaluate the incidence, characteristics, and risk factors for "adding-on," respectively. RESULTS The overall pooled prevalence of "adding-on" was 14%. Subgroup analysis showed that the prevalence of "adding-on" in Lenke 1A adolescent idiopathic scoliosis (AIS), Lenke 2 AIS, Lenke 5 AIS, and mixed AIS was 15%, 12%, 9%, and 16%, respectively. AIS patients with the "adding-on" phenomenon had smaller proximal thoracic curve (PTC), main thoracic curve (MTC), clavicle angle, T1 tilt angle and radiographic shoulder height (RSH), and larger correction of PTC. Age, Risser sign, preoperative PTC, preoperative MTC, preoperative lumbar curve (LC), preoperative coronal balance and sagittal balance, and T4 tile were identified as risk factors of "adding-on." Selection of lower instrumented vertebra (LIV) was also an important risk factor as LIV-Center Sacral Vertical Line (CSVL), LIV-end vertebra, LIV-Stable Vertebra, and LIV-Neutral vertebra, and deviation of LIV+1 was found to be significantly associated with "adding-on." Besides, postoperative MTC was also significantly different between patients with and without "adding-on." CONCLUSION The pooled prevalence varied differently in different types of IS. Patients with "adding-on" had smaller PTC, MTC, angle, T1 tilt angle and RSH, and larger correction of PTC. Younger age, less skeletal maturity, smaller preoperative PTC, smaller preoperative MTC, smaller preoperative LC, larger preoperative coronal, sagittal imbalance, selection of LIV, and overcorrection of coronal and sagittal alignment were risk factors for "adding-on." LEVEL OF EVIDENCE 4.
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Kim HJ, Park HS, Jang MJ, Koh WU, Song JG, Lee CS, Yang HS, Ro YJ. Predicting massive transfusion in adolescent idiopathic scoliosis patients undergoing corrective surgery: Association of preoperative radiographic findings. Medicine (Baltimore) 2018; 97:e10972. [PMID: 29851849 PMCID: PMC6392981 DOI: 10.1097/md.0000000000010972] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
Abstract
Corrective surgery with a posterior approach for adolescent idiopathic scoliosis (AIS) is often accompanied by considerable bleeding. Massive transfusion after excessive hemorrhage is associated with complications such as hypothermia, coagulopathy, and acid-base imbalance. Therefore, prediction and prevention of massive transfusion are necessary to improve the clinical outcome of AIS patients. We aimed to identify the factors associated with massive transfusion in AIS patients undergoing corrective surgery. We also evaluated the clinical outcomes after massive transfusion.We included and analyzed AIS patients who underwent corrective surgery with a posterior approach from January 2008 to February 2015. We retrospectively reviewed the electronic medical records of 765 consecutive patients. We performed multivariable logistic regression analysis to assess the factors related to massive transfusion. Furthermore, we compared the effects of massive transfusion on clinical outcomes, including postoperative morbidity and hospital stay.Of 765 patients, 74 (9.7%) received massive transfusion. Body mass index (odds ratio [OR] 0.782, 95% confidence interval [CI] 0.691-0.885, P < .001) and the number of fused vertebrae (OR 1.322, 95% CI 1.027-1.703, P = .03) were associated with massive transfusion. In the comparison among the different Lenke curve types, Lenke type 4 showed the highest prevalence of massive transfusion. Patients in the massive transfusion group showed a higher incidence rate of postoperative morbidity and prolonged hospital stay.Massive transfusion was required in 9.7% of AIS patients who underwent corrective surgery with a posterior approach. A lower body mass index and higher number of fused vertebrae were associated with massive transfusion. Massive transfusion is related to poor clinical outcomes in AIS patients.
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Affiliation(s)
- Ha-Jung Kim
- Department of Anesthesiology and Pain Medicine
| | | | | | - Won Uk Koh
- Department of Anesthesiology and Pain Medicine
| | | | - Choon-Sung Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, Seoul, Korea
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Zhang S, Zhang L, Feng X, Yang H. Incidence and risk factors for postoperative shoulder imbalance in scoliosis: a systematic review and meta-analysis. 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; 27:358-369. [DOI: 10.1007/s00586-017-5289-y] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Revised: 08/20/2017] [Accepted: 08/27/2017] [Indexed: 01/11/2023]
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Jiang J, Qian BP, Qiu Y, Wang B, Yu Y, Zhu ZZ. Full fusion of proximal thoracic curve helps to prevent postoperative cervical tilt in Lenke type 2 adolescent idiopathic scoliosis patients with right-elevated shoulder. BMC Musculoskelet Disord 2017; 18:362. [PMID: 28835232 PMCID: PMC5569567 DOI: 10.1186/s12891-017-1730-y] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Accepted: 08/16/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To date, no study had reported the phenomenon of deteriorated postoperative cervical tilt in Lenke type 2 adolescent idiopathic scoliosis patients. The purpose of this study is to evaluate the cervical tilt in Lenke type 2 adolescent idiopathic scoliosis patients with right-elevated shoulder treated by either full fusion or partial/non fusion of the proximal thoracic curve. METHODS A total of 30 Lenke type 2 AIS patients with preoperative right-elevated shoulder underwent posterior spinal instrumentation from 2009 to 2011 were included in this study. All the subjects were divided into 2 groups according to the selection of upper instrumented vertebra. There were 14 cases proximally fused to T1 or T2 (Group A) and 16 cases proximally fused to T3 or below (Group B). Both standing anteroposterior and sagittal X-ray films of the spine obtained preoperatively, one week after the operation, and at a minimum of two-year follow-up were analyzed with respect to the following parameters: cervical tilt, T1 tilt, proximal thoracic Cobb angle, main thoracic Cobb angle, apical vertebral translation of proximal thoracic curve, apical vertebral translation of main thoracic curve, radiographic shoulder height, cervical lordosis, proximal thoracic kyphosis and main thoracic kyphosis. RESULTS Most (83.3%) of the patients in these two groups gained satisfactory shoulder balance after surgery. However, the cervical tilt significantly improved in group A (p < 0.001) but deteriorated in group B (p < 0.001). In group A, the decrease of cervical tilt significantly positively correlated with that of T1 tilt (p < 0.001). In group B, the increase of cervical tilt significantly positively correlated with both the increase of T1 tilt (p < 0.001) and the increase of apical vertebral translation of proximal thoracic curve (p < 0.05). CONCLUSIONS Lenke type 2 AIS patients with right-elevated shoulder gain improved shoulder but deteriorated cervical tilt after partial/non fusion of proximal thoracic curve. Full fusion of proximal thoracic curve helps to prevent the residual cervical tilt in these patients.
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Affiliation(s)
- Jun Jiang
- The Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Bang-Ping Qian
- The Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Yong Qiu
- The Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China.
| | - Bin Wang
- The Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Yang Yu
- The Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
| | - Ze-Zhang Zhu
- The Department of Spine Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Zhongshan Road 321, Nanjing, 210008, China
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Lee CS, Hwang CJ, Lee DH, Cho JH. Five major controversial issues about fusion level selection in corrective surgery for adolescent idiopathic scoliosis: a narrative review. Spine J 2017; 17:1033-1044. [PMID: 28373082 DOI: 10.1016/j.spinee.2017.03.020] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 03/12/2017] [Accepted: 03/29/2017] [Indexed: 02/03/2023]
Abstract
BACKGROUND CONTEXT Shoulder imbalance, coronal decompensation, and adding-on phenomenon following corrective surgery in patients with adolescent idiopathic scoliosis are known to be related to the fusion level selected. Although many studies have assessed the appropriate selection of the proximal and distal fusion level, no definite conclusions have been drawn thus far. PURPOSE We aimed to assess the problems with fusion level selection for corrective surgery in patients with adolescent idiopathic scoliosis, and to enhance understanding about these problems. STUDY DESIGN This study is a narrative review. METHODS We conducted a literature search of fusion level selection in corrective surgery for adolescent idiopathic scoliosis. Accordingly, we selected and reviewed five debatable topics related to fusion level selection: (1) selective thoracic fusion; (2) selective thoracolumbar-lumbar (TL-L) fusion; (3) adding-on phenomenon; (4) distal fusion level selection for major TL-L curves; and (5) proximal fusion level selection and shoulder imbalance. RESULTS Selective fusion can be chosen in specific curve types, although there is a risk of coronal decompensation or adding-on phenomenon. Generally, wider indications for selective fusions are usually associated with more frequent complications. Despite the determination of several indications for selective fusion to avoid such complications, no clear guidelines have been established. Although authors have suggested various criteria to prevent the adding-on phenomenon, no consensus has been reached on the appropriate selection of lower instrumented vertebra. The fusion level selection for major TL-L curves primarily focuses on whether distal fusion can terminate at L3, a topic that remains unclear. Furthermore, because of the presence of several related factors and complications, proximal level selection and shoulder imbalance has been constantly debated and remains controversial from its etiology to its prevention. CONCLUSIONS Although several difficult problems in the diagnosis and treatment of adolescent idiopathic scoliosis have been resolved by understanding its mechanism and via technical advancement, no definite guideline for fusion level selection has been established. A review of five major controversial issues about fusion level selection could provide better understanding of adolescent idiopathic scoliosis. We believe that a thorough validation study of the abovementioned controversial issues can help address them.
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Affiliation(s)
- Choon Sung Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, 388-1, PungNap-2-dong, SongPa-gu, Seoul 05505, Republic of Korea
| | - Chang Ju Hwang
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, 388-1, PungNap-2-dong, SongPa-gu, Seoul 05505, Republic of Korea
| | - Dong-Ho Lee
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, 388-1, PungNap-2-dong, SongPa-gu, Seoul 05505, Republic of Korea
| | - Jae Hwan Cho
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan College of Medicine, 388-1, PungNap-2-dong, SongPa-gu, Seoul 05505, Republic of Korea.
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