1
|
Han G, Fan Z, Yue L, Zou D, Zhou S, Qiu W, Sun Z, Li W. Paraspinal muscle endurance and morphology (PMEM) score: a new method for prediction of postoperative mechanical complications after lumbar fusion. Spine J 2024:S1529-9430(24)00262-6. [PMID: 38843961 DOI: 10.1016/j.spinee.2024.05.010] [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: 11/17/2023] [Revised: 05/21/2024] [Accepted: 05/27/2024] [Indexed: 06/20/2024]
Abstract
BACKGROUND CONTEXT Although the relationships between paraspinal muscles and lumbar degenerative disorders have been acknowledged, paraspinal muscle evaluation has not been incorporated into clinical therapies. PURPOSE We aimed to establish a novel paraspinal muscle endurance and morphology (PMEM) score to better predict mechanical complications after lumbar fusion. STUDY DESIGN Prospective cohort study. PATIENT SAMPLE A total of 212 patients undergoing posterior lumbar interbody fusion with at least 1 year of follow-up were finally included. OUTCOME MEASURES Mechanical complications including screw loosening, pseudarthrosis and other complications like cage subsidence, and patient-reported outcomes were evaluated at last follow-up. METHODS The PMEM score comprised 1 functional muscular parameter (the performance time of the endurance test) and 2 imaging muscular parameters (relative functional cross-sectional area [rFCSA] of paraspinal extensor muscles [PEM] and psoas major [PS] on magnetic resonance imaging). The score was established based on a weighted scoring system created by rounding β regression coefficients to the nearest integer in univariate logistic regression. The diagnostic performance of the PMEM score was determined by binary logistic regression model and receiver operating characteristic (ROC) curve with the area under the curve (AUC). Additionally, pairwise comparisons of ROC curves were conducted to compare the diagnostic performance of the PMEM score with conventional methods based on a single muscular parameter. Moreover, differences of mechanical complications and patient-reported outcomes among the PMEM categories were analyzed using Chi-square test with Bonferroni correction. RESULTS The PMEM score, calculated by adding the scores for each parameter, ranges from 0 to 5 points. Patients with higher PMEM scores exhibited higher rates of mechanical complications (p<.001). Binary logistic regression revealed that the PMEM score was an independent factor of mechanical complications (p<.001, OR=2.002). Moreover, the AUC of the PMEM score (AUC=0.756) was significantly greater than those of the conventional methods including the endurance test (AUC=0.691, Z=2.036, p<.05), PEM rFCSA (AUC=.690, Z=2.016, p<.05) and PS rFCSA (AUC=0.640, Z=2.771, p<.01). In terms of the PMEM categories, a score of 0-1 was categorized as low-risk muscular state of mechanical complications; 2-3, as moderate; and 4-5, as high-risk state. Moving from the low-risk state to the high-risk state, there was a progressive increase in the rates of mechanical complications (13.8% vs. 32.1% vs. 72.7%; p<.001), and a decrease in the rates of clinically significant improvement of patient-reported outcomes (all p<.05). CONCLUSIONS The PMEM score might comprehensively evaluate paraspinal muscle degeneration and exhibit greater ability in predicting mechanical complications than the conventional evaluations after lumbar fusion. Surgeons might develop individualized treatment strategy tailored to different muscle degeneration statuses reflected by the PMEM score for decreasing the risk of mechanical complications.
Collapse
Affiliation(s)
- Gengyu Han
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Zheyu Fan
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Lihao Yue
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Da Zou
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Siyu Zhou
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Weipeng Qiu
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Zhuoran Sun
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China
| | - Weishi Li
- Department of Orthopaedics, Peking University Third Hospital, Beijing, 100191, China; Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Beijing, 100191, China; Beijing Key Laboratory of Spinal Disease Research, Beijing, 100191, China.
| |
Collapse
|
2
|
Schönnagel L, Zhu J, Camino-Willhuber G, Guven AE, Tani S, Caffard T, Haffer H, Muellner M, Chiapparelli E, Arzani A, Amoroso K, Moser M, Shue J, Tan ET, Carrino JA, Sama AA, Cammisa FP, Girardi FP, Hughes AP. Relationship between lumbar spinal stenosis and axial muscle wasting. Spine J 2024; 24:231-238. [PMID: 37788745 DOI: 10.1016/j.spinee.2023.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 09/14/2023] [Accepted: 09/26/2023] [Indexed: 10/05/2023]
Abstract
BACKGROUND CONTEXT Although the effect of lumbar spinal stenosis (LSS) on the lower extremities is well documented, limited research exists on the effect of spinal stenosis on the posterior paraspinal musculature (PPM). Similar to neurogenic claudication, moderate to severe spinal canal compression can also interfere with the innervation of the PPM, which may result in atrophy and increased fatty infiltration (FI). PURPOSE This study aims to assess the association between LSS and atrophy of the PPM. STUDY DESIGN Retrospective cross-sectional study. PATIENT SAMPLE Patients undergoing MRI scans at a tertiary orthopedic center for low back pain or as part of a preoperative evaluation. OUTCOME MEASURES The functional cross-sectional area (fCSA) and percent fatty infiltration (FI) of the PPM at L4. METHODS Lumbar MRIs of patients at a tertiary orthopedic center indicated due to lower back pain (LBP) or as a presurgical workup were analyzed. Patients with previous spinal fusion surgery or scoliosis were excluded. LSS was assessed according to the Schizas classification at all lumbar levels. The cross-sectional area of the PPM was measured on a T2-weighted MRI sequence at the upper endplate of L4. The fCSA and fatty infiltration (FI) were calculated using custom software. Crude differences in FI and fCSA between patients with no stenosis and at least mild stenosis were tested with the Wilcoxon signed-rank test. To account for possible confounders, a multivariable linear regression model was used to adjust for age, sex, body mass index (BMI), and disc degeneration. A subgroup analysis according to MRI indication was performed. RESULTS A total of 522 (55.7% female) patients were included. The median age was 61 years (IQR: 51-71). The greatest degree of moderate and severe stenosis was found at L4/5, 15.7%, and 9.2%, respectively. Stenosis was the least severe at L5/S1 and was found to be 2% for moderate and 0.2% for severe stenosis. The Wilcoxon test showed significantly increased FI of the PPM with stenosis at any lumbar level (p<.001), although no significant decrease in fCSA was observed. The multivariable regression model showed a significant increase in FI with increased LSS at L1/2, L2/3, and L3/4 (p=.013, p<.01 and p=.003). The severity of LSS at L4/5 showed a positive association with the fCSA (p=.019). The subgroup analysis showed, the effect of LSS was more pronounced in nonsurgical patients than in patients undergoing surgery. CONCLUSIONS In this study, we demonstrated a significant and independent association between LSS and the composition of the PPM, which was dependent on the level of LSS relative to the PPM. In addition to neurogenic claudication, patients with LSS might be especially susceptible to axial muscle wasting, which could worsen LSS due to increased spinal instability, leading to a positive feedback loop.
Collapse
Affiliation(s)
- Lukas Schönnagel
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Jiaqi Zhu
- Biostatistics Core, Hospital for Special Surgery, New York City, NY, USA
| | | | - Ali E Guven
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Soji Tani
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Department of Orthopaedic Surgery, School of Medicine, Showa University Hospital, Tokyo, Japan
| | - Thomas Caffard
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Universitätsklinikum Ulm, Klinik für Orthopädie, Ulm, Germany
| | - Henryk Haffer
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Maximilian Muellner
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Center for Musculoskeletal Surgery, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Erika Chiapparelli
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Artine Arzani
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Krizia Amoroso
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Manuel Moser
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA; Department of Spine Surgery, Lucerne Cantonal Hospital, Lucerne, Switzerland
| | - Jennifer Shue
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Ek T Tan
- Department of Radiology and Imaging, Hospital for Special Surgery, New York City, NY, USA
| | - John A Carrino
- Department of Radiology and Imaging, Hospital for Special Surgery, New York City, NY, USA
| | - Andrew A Sama
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Frank P Cammisa
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Federico P Girardi
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA
| | - Alexander P Hughes
- Spine Care Institute, Hospital for Special Surgery, New York City, NY, USA.
| |
Collapse
|
3
|
Yang S, Chen C, Tang Y, Li K, Yu X, Tan J, Zhang C, Rong Z, Xu J, Luo F. The effects of back extensor strength in different body positions on health-related quality of life in patients with degenerative spinal deformity. J Back Musculoskelet Rehabil 2024; 37:503-511. [PMID: 38143335 DOI: 10.3233/bmr-230206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2023]
Abstract
BACKGROUND Degenerative spinal deformity (DSD) is believed to originate from degeneration of the discs and facet joints and vertebral wedging. Currently, the nosogeny of DSD is not yet fully clarified and there has been no systematic study on the impact of their lower back muscle strength on quality of life. OBJECTIVE To determine the characteristics of back extensor strength (BES) in different body positions and examine their correlations with health-related quality of life (HQOL) in degenerative spinal deformity (DSD) patients. METHODS Participants comprised 60 DSD patients and 40 healthy volunteers. Maximal isometric BES was evaluated by dynamometers with the subject in three different positions (standing, prone, sitting). The visual analogue scale (VAS) score, Oswestry Disability Index (ODI), Roland-Morris Disability Questionnaire (RMQ), and 36-item Short Form Health Survey (SF-36) score were used to evaluate patient HQOL. Correlations between the BES in different body positions and HQOL were analysed. RESULTS The BES values in three body positions were significantly smaller in DSD patients than healthy subjects (P< 0.05). The standing BES was found to be negatively associated with ODI and RMQ (R= 0.313, p< 0.05 and R= 0.422, p< 0.01, respectively). A negative relationship between sitting BES and RMQ was also seen (R= 0.271, p< 0.05). In addition, the standing and prone BES were positively correlated with the physical functioning score of the SF-36 (R= 0.471, p< 0.01 and R= 0.289, p< 0.05, respectively), and the sitting BES was positively correlated with the role-physical score of the SF-36 (R= 0.436, p< 0.01). CONCLUSION The results indicate that the back extensor muscle is compromised in DSD patients and there are differences in predicting the severity of disability and physical HQOL scores with BES in different positions. Standing BES was the most reliable contributor to HQOL among three body positions.
Collapse
Affiliation(s)
- Sen Yang
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
- Department of Medical Research, Army Medical Center (Daping Hospital), Army Medical University, Chongqing, China
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Can Chen
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
- Department for Combat Casualty Care Training, Training Base for Army Health Care, Army Medical University, Chongqing, China
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Yong Tang
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Kai Li
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Xueke Yu
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Jiulin Tan
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Chengmin Zhang
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Zhigang Rong
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Jianzhong Xu
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| | - Fei Luo
- Department of Orthopaedics, Southwest Hospital, Army Medical University, Chongqing, China
| |
Collapse
|
4
|
Liu Y, Yuan L, Zeng Y, Ni J, Yan S. The Difference in Paraspinal Muscle Parameters and the Correlation with Health-Related Quality of Life among Healthy Individuals, Patients with Degenerative Lumbar Scoliosis and Lumbar Spinal Stenosis. J Pers Med 2023; 13:1438. [PMID: 37888049 PMCID: PMC10608224 DOI: 10.3390/jpm13101438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2023] [Revised: 09/23/2023] [Accepted: 09/24/2023] [Indexed: 10/28/2023] Open
Abstract
(1) Background: Paraspinal muscle degeneration affects the quality of life in patients with degenerative lumbar scoliosis (DLS) and lumbar spinal stenosis (LSS). We aimed to describe the characteristics and differences in the paraspinal muscle parameters between patients with DLS and LSS and investigate their correlation with health-related quality of life (HRQOL). (2) Methods: There were forty-four participants in each group, namely the DLS, LSS, and healthy groups, who were matched at a ratio of 1:1 according to age, sex, and BMI. Differences in paraspinal muscle parameters among the three groups were compared using analysis of variance or the Mann-Whitney U test, and paraspinal muscle degeneration and HRQOL were analyzed using Spearman's correlation analysis. (3) Results: In the upper lumbar, the psoas (PS), quadratus lumborum (QL), and multifidus (MF) cross-sectional area (CSA) in the DLS group were smaller than those in the other groups. In the lower lumbar region, the CSA of the PS, QL, erector spinae (ES), and gross CSA (GCSA) of the MF in the DLS group were not significantly different from those in the LSS group. These values were lower than those observed in the healthy group. The lean muscle fat index (LMFI) of the MF and ES groups was higher than those of the other groups. Regarding HRQOL, we found that PS and MF CSA were strongly associated with HRQOL in healthy individuals; however, only MF was associated with HRQOL in the LSS group. (4): Conclusion: PS in the upper lumbar region and MF degeneration were more severe in patients with DLS than in those with LSS. ES degeneration was similar between the LSS and DLS groups. MF muscle atrophy in patients with LSS and asymmetric changes in the MF in DLS are associated with quality of life.
Collapse
Affiliation(s)
- Yinhao Liu
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China; (Y.L.); (L.Y.); (J.N.); (S.Y.)
- Beijing Key Laboratory of Spinal Disease Research, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Peking University Third Clinical College, Peking University Health Science Center, Haidian District, No. 38 Xueyuan Road, Beijing 100191, China
| | - Lei Yuan
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China; (Y.L.); (L.Y.); (J.N.); (S.Y.)
- Beijing Key Laboratory of Spinal Disease Research, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
| | - Yan Zeng
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China; (Y.L.); (L.Y.); (J.N.); (S.Y.)
- Beijing Key Laboratory of Spinal Disease Research, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
| | - Jiajun Ni
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China; (Y.L.); (L.Y.); (J.N.); (S.Y.)
- Beijing Key Laboratory of Spinal Disease Research, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Peking University Third Clinical College, Peking University Health Science Center, Haidian District, No. 38 Xueyuan Road, Beijing 100191, China
| | - Shi Yan
- Department of Orthopedics, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China; (Y.L.); (L.Y.); (J.N.); (S.Y.)
- Beijing Key Laboratory of Spinal Disease Research, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Engineering Research Center of Bone and Joint Precision Medicine, Ministry of Education, Peking University Third Hospital, 49 North Garden Road, Beijing 100191, China
- Peking University Third Clinical College, Peking University Health Science Center, Haidian District, No. 38 Xueyuan Road, Beijing 100191, China
| |
Collapse
|
5
|
Chen C, Yang S, Tang Y, Yu X, Chen C, Zhang C, Luo F. Correlation between strength/endurance of paraspinal muscles and sagittal parameters in patients with degenerative spinal deformity. BMC Musculoskelet Disord 2023; 24:643. [PMID: 37563700 PMCID: PMC10413613 DOI: 10.1186/s12891-023-06747-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 07/24/2023] [Indexed: 08/12/2023] Open
Abstract
BACKGROUND Sagittal imbalance is a common cause of low back pain and dysfunction in patients with degenerative spinal deformity (DSD), which greatly affects their quality of life. Strength and endurance are important functional physical indexes for assessing muscle condition. However, the correlation between sagittal parameters and paraspinal muscle strength/endurance is not yet clear. The purpose of this study was to analyze the correlation between strength/endurance of paraspinal muscles and sagittal parameters in patients with DSD. METHODS There were 105 patients with DSD and 52 healthy volunteers (control group) enrolled. They were divided into the balance group [sagittal vertical axis (SVA) < 5 cm, n = 68] and imbalance group (SVA ≥ 5 cm, n = 37). The maximal voluntary exertion (MVE)/Endurance time (ET) of paravertebral muscles were assessed using the prone position test stand, and the sagittal parameters of the subjects were measured, namely, SVA, thoracic kyphosis (TK), lumbar lordosis (LL), pelvic incidence (PI), pelvic tilt (PT), and sacral slope (SS). Pearson coefficients were used to assess the correlation between paraspinal muscle MVE/ET and sagittal parameters. RESULTS MVE and ET of paravertebral muscles in the control group were significantly higher than those in the balance and imbalance groups (P < 0.05), whereas MVE in the balance group was significantly higher than that in the imbalance group (P < 0.05). SVA in the imbalance group was significantly higher than those in the control and balance groups (P < 0.05). SS and TK in the control group were significantly higher than those in the imbalance group (P < 0.05), and PT and PI in the control group were significantly lower than those in the balance and imbalance groups (P < 0.05). LL in the imbalance group was significantly lower than that in the balance and control groups (P < 0.05). MVE, MVE/BH, and MVE/BW of paraspinal muscles in the imbalance group were negatively correlated with SVA and PT. Moreover, they were positively correlated with LL. CONCLUSIONS Deformity may cause the decrease of MVE and ET of paraspinal muscles in the prone position in patients with DSD. Furthermore, the decline in MVE of paraspinal muscles may be a predisposing factor for the imbalance observed. The decrease of MVE/BW of paraspinal muscles may be involved in spinal compensation, and it is a sensitive indicator for sagittal imbalance and lumbar lordosis.
Collapse
Affiliation(s)
- Can Chen
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
- Department for Combat Casualty Care Training, Training Base for Army Health Care, Army Medical University (Third Military Medical University), 400038 Chongqing, China
| | - Sen Yang
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
- Department of Orthopaedics, The Hospital of Eighty-third Army, Xinxiang Medical College, 210 Wenhua Street, Hongqi District, 453000 Xinxiang, Henan province China
| | - Yong Tang
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
| | - Xueke Yu
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
| | - Chunhua Chen
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
| | - Chengmin Zhang
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
| | - Fei Luo
- Department of Orthopaedics, Southwest Hospital, Army Medical University (Third Military Medical University), No 30, Gaotanyan Street, 400038 Shapingba, Chongqing, China
| |
Collapse
|