Publications by authors named "Xiangyao Sun"

This study aims to explore the connections between risk factors and clinical outcomes in octogenarian patients diagnosed with adult degenerative scoliosis (ADS). A total of 394 patients participated in this study, with 206 individuals in the younger group and 188 in the octogenarian group. We meticulously gathered patient demographics, including basic information, comorbidities, radiographic data, clinical scoring systems, and details on medical and surgical complications as well as revision surgeries.

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Background: This study investigated the association between high-risk perioperative medications (HRPOMs) and postoperative cardiac complications in older adults undergoing spinal surgery.

Methods: This retrospective cohort study included patients aged 75 years and older who underwent elective spinal surgery under general anesthesia between January 2020 and December 2022. We collected data on demographic characteristics, comorbidities, preoperative hemoglobin level, intraoperative details and postoperative cardiac complications.

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Study Design: A retrospective study.

Objective: To investigate how the femurs and pelvis collaboratively maintain sagittal balance and energy-efficient alignment by investigating sagittal parameters.

Summary Of Background Data: Sagittal parameters are increasingly acknowledged as fundamental determinants in sustaining balance and energy-efficient postures.

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Article Synopsis
  • The study investigates the diagnosis and treatment of polytrauma patients with spinal injuries, focusing on the timing and location of initial surgeries and their impact on patient outcomes.
  • Data from 60 patients between January 2017 and January 2023 showed that surgery within 12 hours resulted in the most severe conditions, while operations after 48 hours led to better recovery, suggesting an optimal surgery window of 12 to 48 hours for improved survival rates.
  • Key risk factors for poor outcomes included age and previous surgeries unrelated to the spine, while patients suffering from hemorrhagic shock exhibited the lowest survival rates after surgery.
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The treatment of skip-level cervical degenerative disease (CDD) with no degenerative changes observed in the intervening segment (IS) is complicated. This research aims to provide a reference basis for selecting treatment approaches for noncontiguous CDD. To establish accurate finite element models (FEMs), this study included computed tomography (CT) data from 21 patients with CDD (10 males and 11 females) for modeling.

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Background: Hybrid construction (HC) may be an ideal surgical strategy than noncontinuous total disc replacement (TDR) and noncontinuous anterior cervical discectomy and fusion (ACDF) in the treatment of noncontinuous cervical spondylopathy. However, there is still no consensus on the segmental selection for ACDF or TDR in HC. The study aims to analyse the effects of different segment selection of TDR and ACDF on cervical biomechanical characteristics after HC surgery.

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Background: The frequency of acute hypertriglyceridemic pancreatitis (AHTGP) is increasing worldwide. AHTGP may be associated with a more severe clinical course and greater mortality than pancreatitis caused by other causes. Early identification of patients with severe inclination is essential for clinical decision-making and improving prognosis.

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Objective: To explore the characteristics of the sagittal spinopelvic profile in the elderly Chinese population with lumbar disc herniation (LDH) and to evaluate its influence on the severity, location and number of disc degeneration.

Methods: A retrospective analysis was conducted on 212 elderly Chinese patients with LDH and 213 asymptomatic volunteers with matched age and sex. Sagittal spinopelvic parameters were measured on the full-length X-ray and the sagittal profiles were determined according to the Roussouly classification.

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Study Design: A retrospective study.

Objective: To evaluate the different degeneration patterns of paraspinal muscles in degenerative lumbar diseases and their correlation with lumbar spine degeneration severity. The degeneration characteristics of different paraspinal muscles in degenerative lumbar diseases remain unclear.

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Background: To achieve the proper sagittal alignment, previous studies have developed different assessment systems for adult degenerative scoliosis (ADS) which could help the spine surgeon in making treatment strategies. The purpose of our study is to evaluate whether Roussouly classification or global alignment and proportion (GAP) score is more appropriate in the prediction of mechanical complications after surgical treatment of ADS.

Methods: ADS patients who received long segmental fusion in the treatment during the period from December 2016 to December 2018 were evaluated in this study.

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Study Design: A retrospective case-control study.

Objective: To evaluate the behavior of pelvic incidence (PI) after different posterior spinal procedures in elderly patients with adult spinal deformity (ASD), to determine the potential associated factors with the variability in PI after spinal surgery and to comprehensively analyze its mechanisms.

Methods: Elderly patients underwent long fusion to sacrum with and without pelvic fixation were assigned to Group L+P and Group L-P, respectively.

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Purpose: To investigate the diagnostic value of contrast-enhanced three-dimensional (3D) T2-weighted turbo spin-echo SPACE (T2-SPACE) sequence in LNRC.

Methods: A total of 90 surgically confirmed LNRC patients with 165 explored nerve roots were enrolled in this study. Diagnostic values were quantified using sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy.

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This study evaluated differences in outcome variables between dynamic stabilization adjacent to fusion (DATF) and posterior lumbar interbody fusion (PLIF) for the treatment of lumbar degenerative disease. A systematic review of PubMed, EMBASE, and Cochrane was performed. The variables of interest included clinical adjacent segment pathologies (CASPs), radiological adjacent segment pathologies (RASPs), lumbar lordosis (LL), visual analogue scale (VAS) of back (VAS-B) and leg (VAS-L), Oswestry disability index (ODI), Japanese Orthopaedic Association (JOA) score, duration of surgery (DS), estimated blood loss (EBL), complications, and reoperation rate.

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Cervical deformity (CD) is a kind of disorder influencing cervical alignment. Although the incidence of CD is not high, this deformity can cause not only pain but also difficulties in daily activities such as swallowing and maintaining upright position. Even though the common cause of cervical deformity is still controversial, previous studies divided CD into congenital deformity and secondary deformity; secondary deformity includes iatrogenic and noniatrogenic deformity according to pathogenic factors.

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The treatment effects of topping-off technique were still controversial. This study compared all available data on postoperative clinical and radiographic outcomes of topping-off technique and posterior lumbar interbody fusion (PLIF). PubMed, EMBASE, and Cochrane were systematically reviewed.

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Purpose: To compare the acute behaviors of pelvic incidence (PI) between elderly adult spinal deformity (ASD) patients with severe and minor sagittal deformity based on SRS-Schwab classification and to identify the mechanism of the variability in PI after long fusion to S1.

Methods: Patients aged 60 years or above with available radiographs were included. The following parameters were measured pre- and postoperatively: Thoracic kyphosis, thoracolumbar kyphosis (TLK), lumbar lordosis (LL), PI, pelvic tilt, sacral slope, sagittal vertical axis (SVA), PI-LL and T1 pelvic angle (TPA).

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Background: When talking about backward displacement of the vertebra, it generally refers to the retrolisthesis under low pelvic incidence (PI). It is worth to mention that lumbar retrolisthesis could also occur under a high-grade PI. Little knowledge was known about the radiographic characteristics and developmental mechanism of the retrolisthesis under high PI.

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Background: Biomechanical characteristics of noncontinuous ACDF and noncontinuous CDA in the treatment of noncontinuous cervical degenerative disc disease were still unclear. The aim of this research is to compare the differences between these two kinds of treatment methods and to verify the effectiveness of Prodisc-C in noncontinuous CDA.

Methods: Eight FEMs of the cervical spine (C2-C7) were built based on CT images of 8 mild CDDD volunteers.

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Background: The difference between topping-off technique and posterior lumbar interbody fusion (PLIF) in postoperative outcomes is still controversial. The aim of this study is to compare all available data on outcomes of topping-off technique and PLIF in the treatment of chronic low back pain.

Methods: Articles in PubMed, EMBASE and Cochrane were reviewed.

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Background: To our knowledge, laminectomy with fusion (LCF) and laminoplasty alone (LP) are both effective posterior surgical approaches for decompression of cervical spondylotic myelopathy (CSM). However, which one is suitable for patients has no standard answer. This study estimated whether the ratio of C2-C7 Cobb angle to T1 slope (CL/T1S) could be an indication of posterior surgical approach.

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Background: Proper reduction method for Lumbar degenerative spondylolisthesis (LDS) is still controversial. The aim of this study was to determine the safety and effectiveness of lever reduction combined with traditional elevating-pull reduction technique for the treatment of elderly patients with LDS.

Methods: From May 2015 to December 2017, 142 elderly patients (≥65 years) diagnosed with LDS were enrolled in this study with a mean follow-up of 25.

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Study Design: Multivariate analysis of retrospective registry data.

Objective: To report the perioperative complication in a large cohort of surgery for elderly degenerative lumbar scoliosis (DLS) patients and to analyze the risk factors.

Summary Of Background Data: The perioperative complication rate and risk factors for patients with DLS remain unclear, especially in elderly population.

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Background: There were several reports describing the biomechanics and microstructure of multifidus muscles in patients with lumbar disc herniation. However, correlations between lumbar multifidus muscle atrophy (LMA), spinopelvic parameters, and severity of adult degenerative scoliosis (ADS) have not been investigated. The study evaluated the impact of LMA and spinopelvic parameters on the severity of ADS.

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Background: The aim of this study was to compare the reliability and validity of the CARDS and French classification systems for lumbar DS.

Methods: Between May 2013 and December 2016, 158 consecutive patients diagnosed with single-level lumbar DS were included in this study, and all underwent lumbar fusion. All patients underwent long-cassette standing anterioposterior and lateral radiographs of the spine preoperatively and postoperatively.

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Objective: To evaluate the relationship between degenerative lumbar spondylolisthesis (DLS) and the L4 inclination angle (IA) and evaluate the risk factors of DLS.

Methods: Ninety patients with L4-L5 DLS and 90 with L4-L5 lumbar disc herniation or spinal stenosis (control group) were compared. Parameters including L4 IA, facet joint angle (FJA), cross-sectional area of paraspinal muscle, Pfirrmann grading of intervertebral disc, and degeneration grading of facet joint (FJ) were evaluated.

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