Intervertebral Disc Displacement

椎间盘移位
  • 文章类型: Journal Article
    目的:腰椎间盘突出症(LDH)的发病率呈逐年上升趋势,影响年轻年龄组的新兴趋势。本研究旨在探讨二仙汤联合耳穴贴压治疗LDH的临床疗效。我们的目标是提供证据支持在临床环境中纳入中医(TCM)康复技术。
    方法:这项随机对照试验纳入了102名诊断为LDH的患者,并将他们分为对照组和干预组。对照组进行为期2周的康复治疗,干预组在对照组的基础上接受二仙汤和耳穴贴压治疗。主要结局指标包括3个量表-视觉模拟量表(VAS),日本骨科协会(JOA),和Oswestry残疾指数-以及3种炎症标志物:C反应蛋白(CRP),白细胞介素-6(IL-6),和肿瘤坏死因子-α(TNF-α)。此外,评估压力痛阈值和疼痛耐受阈值.参与者在基线时进行评估,在14天,治疗后28天。
    结果:治疗2周后,对照组和干预组均表现出VAS的显着改善,JOA,ODI,CRP,IL-6,TNF-α,压力痛阈值,和疼痛耐受阈值(P<0.05)。这些改善在VAS的28天中持续存在,JOA,和ODI得分(P<0.05)。在14天,在VAS方面,干预组显示出明显优于对照组的结果,JOA,ODI,CRP,TNF-α,和压力痛阈值(P<0.05)。
    结论:与常规康复治疗相比,二仙汤联合耳穴贴压治疗在缓解LDH患者症状方面具有明显的益处。这种方法提供了新的观点,并为未来LDH的治疗策略提供了证据。
    OBJECTIVE: The incidence of lumbar disc herniation (LDH) is on the rise annually, with an emerging trend of affecting younger age groups. This study aims to investigate the clinical effectiveness of combining Erxian decoction with auricular acupoint pressure therapy in treating LDH. Our objective is to furnish evidence supporting the incorporation of traditional Chinese medicine (TCM) rehabilitation techniques in clinical settings.
    METHODS: This randomized controlled trial enrolled 102 patients diagnosed with LDH and allocated them into Control and Intervention groups. The Control group underwent a 2-week rehabilitation regimen, whereas the Intervention group received an augmented treatment comprising Erxian decoction along with auricular acupoint pressure therapy based on the Control group. Main outcome measures included 3 scales - visual analog scale (VAS), Japanese Orthopedic Association (JOA), and Oswestry Disability Index - as well as 3 inflammatory markers: C-reactive protein (CRP), interleukin-6 (IL-6), and tumor necrosis factor-α (TNF-α). Additionally, pressure pain threshold and pain tolerance threshold values were evaluated. Participants were assessed at baseline, on 14-day, and on 28-day posttreatment.
    RESULTS: After 2 weeks of treatment, both the Control and Intervention groups exhibited significant improvements in the VAS, JOA, ODI, CRP, IL-6, TNF-α, pressure pain threshold, and pain tolerance threshold (P < .05). These improvements persisted at the 28-day in the VAS, JOA, and ODI scores (P < .05). On 14-day, the Intervention group showed significantly better outcomes compared to the Control group in terms of the VAS, JOA, ODI, CRP, TNF-α, and pressure pain threshold (P < .05).
    CONCLUSIONS: Compared to conventional rehabilitation therapy, the combination of Erxian decoction and auricular acupoint pressure therapy demonstrates clear benefits in alleviating symptoms in patients with LDH. This approach offers fresh perspectives and substantiates evidence for future treatment strategies in managing LDH.
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  • 文章类型: Letter
    暂无摘要。
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  • 文章类型: Case Reports
    目的:电视胸腔镜手术后的术后疼痛通常使用胸段硬膜外镇痛药或胸椎旁镇痛药治疗。本文介绍了一种通过胸腔镜显微椎间盘切除术和术后胸段硬膜外镇痛药治疗胸椎间盘突出症的情况。患者出现布比卡因胸腔积液,在计算机断层扫描(CT)上模仿血胸。
    方法:使用高效液相色谱法确认胸腔积液中布比卡因的存在。
    结果:患者接受再次探查以缓解胸腔积液。患者的长期恢复与简单的胸腔镜显微椎间盘切除术的预期相似。
    结论:当在胸膜腔和硬膜外腔之间有走廊的患者中使用胸腔硬膜外镇痛药时,可能会发生胸腔积液。
    OBJECTIVE: Post-operative pain after video-assisted thoracoscopic surgery is often treated using thoracic epidural analgesics or thoracic paravertebral analgesics. This article describes a case where a thoracic disc herniation is treated with a thoracoscopic microdiscectomy with post-operative thoracic epidural analgesics. The patient developed a bupivacaine pleural effusion which mimicked a hemothorax on computed tomography (CT).
    METHODS: The presence of bupivacaine in the pleural effusion was confirmed using a high performance liquid chromatography method.
    RESULTS: The patient underwent a re-exploration to relieve the pleural effusion. The patient showed a long-term recovery similar to what can be expected from an uncomplicated thoracoscopic microdiscectomy.
    CONCLUSIONS: A pleural effusion may occur when thoracic epidural analgesics are used in patents with a corridor between the pleural cavity and epidural space.
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  • DOI:
    文章类型: Journal Article
    The purpose of the study was a comparative analysis the effectiveness of microsurgical discectomy and minimally invasive transforaminal lumbar interbody fusion in the treatment of disk herniation adjacent to the anomaly of the lumbosacral junction segment in elderly patients. The study included 80 elderly patients (over 60 years old), divided into two groups: the 1st-(n=39) who underwent microsurgical discectomy; the 2nd- patients (n=41) operated on using minimally invasive transforaminal interbody fusion and percutaneous transpedicular stabilization (MI-TLIF). For the comparative analysis, we used gender characteristics (gender, age), constitutional characteristics (BMI), degree of physical status according to ASA, intraoperative parameters of interventions and the specificity of postoperative patient management, clinical data, and the presence of complications. Long-term outcomes were assessed at a minimum follow-up of 3 years. As a result, it was found that the use of MI-TLIF allows achieving better long-term clinical outcomes, fewer major complications in comparison with the microsurgical discectomy technique in the treatment of disc herniation adjacent to the anomaly of the lumbosacral junction segment in elderly patients.
    Цель исследования — сравнительный анализ эффективности использования микрохирургической дискэктомии и минимально инвазивного трансфораминального спондилодеза при лечении грыж межпозвонковых дисков смежного с аномалией пояснично-крестцового перехода уровня у пациентов старшей возрастной группы. В исследование были включены 80 пациентов пожилого возраста (старше 60 лет), выделено две группы: 1-я — пациенты (n=39), которым выполняли микрохирургическую дискэктомию; 2-я — пациенты (n=41), прооперированные с использованием минимально инвазивного трансфораминального межтелового спондилодеза, чрескожной транспедикулярной стабилизации (MI-TLIF). Для сравнительного анализа использовали гендерные характеристики (пол, возраст), конституциональные особенности (ИМТ), степень физического статуса по ASA, интраоперационные параметры вмешательств и специфичность послеоперационного ведения пациентов, клинические данные, наличие осложнений. Оценку отдаленных исходов проводили в минимальном катамнезе 3 лет. В результате установлено, что использование MI-TLIF позволяет достичь лучших отдаленных клинических исходов, меньшего числа серьезных осложнений в сравнении с методикой микрохирургической дискэктомии при лечении грыж межпозвонковых дисков смежного с аномалией пояснично-крестцового перехода уровня у пациентов старшей возрастной группы.
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  • 文章类型: Journal Article
    一项观察性研究,旨在发现影响腰骶部区域的常见情况,这些情况可能会影响腰骶部的位置和张力。所有的病人,仰卧位进行了MRI检查(磁共振成像),由同一位放射科顾问进行检查。这篇文章是由机构伦理批准委员会修订的。观察神经根的位置,并在L3(第三腰椎)的中段之间通过的线之前计算神经根的数量。放射科医师在右椎间孔和左椎间孔的水平上计算了该线之前的神经根的数量。此程序适用于正常组,重复出现5种常见病理疾病,包括单节段腰椎间盘突出症,多椎间盘脱垂,多个凸起,椎管狭窄和腰椎滑脱(L45水平(第四至第五腰椎)或L5S1水平(第五腰椎至第一骶椎)在研究区域之外,即,L3)。我们注意到椎间盘突出病例之间的神经根数量存在显着差异,椎管狭窄,腰椎滑脱与正常组的显著性是递增的,在腰椎滑脱病例中显著性最高,甚至在统计上不显著的其他病理组中,我们注意到,显著性是成正比的疾病的严重程度是最小的单一水平的病例(p0.427),在多发性脱垂的病例中更显著(p0.319),在多发性凸起的病例中更显著,在椎管狭窄病例中的意义更高,在腰椎滑脱病例中的意义最高。
    An observational study to discover the common conditions affecting the lumbosacral region that may affect lumbosacral position and tension. All the patients, underwent MRI exaamination (magnetic resonance imaging) in the supine position, were examined by the same consultant radiologist. The article was revised by the institutional ethical approval committee. The position of the nerve roots was observed, and the number of nerve roots was calculated anterior to a line passing between the mid-transvers process of L3(third lumbar vertebra). The number of nerve roots ahead of this line was calculated by the radiologist at the level of the right intervertebral foramen and at the left one. This procedure was applied to the normal group, and 5 common pathological diseases were repeated including single-level lumbar disc prolapse, multiple-disc prolapse, multiple bulge, spinal stenosis and spondylolisthesis (at the level of L45 (fourth to fifth lumbar vertebrae) or L5S1 (fifth lumbar to first sacral vertebrae) being outside the study area, i.e., L3). We noticed significant difference in the number of the nerve roots between the cases with herniated discs, spinal stenosis, and spondylolisthesis with the normal group and the significance was in ascending increment in significance being the highest in cases with spondylolisthesis, and even in the groups of other pathologies which are statistically not significant, we noticed that the significance is proportional to the severity of the disease being the least in single level cases (p 0.427), to be more significant on cases with multiple prolapses(p 0.319) to be more in cases with multiple bulges to start to be statistically significant in herniated, higher significance in cases with spinal stenosis to be the highest in cases with spondylolisthesis.
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  • 文章类型: Journal Article
    背景和目的:本研究的目的是介绍我们在侧卧位经胸入路手术治疗钙化性胸椎间盘突出症的经验,并使用术中计算机断层扫描(iCT)和增强现实(AR)。材料和方法:本研究包括所有在我们部门使用iCT和基于显微镜的AR通过经胸胸膜入路接受钙化胸椎间盘手术的患者。结果:连续6例患者(5例女性,中位年龄53.2±6.4岁)伴有钙化性胸椎椎间盘突出(两名患者Th10-11级,该病例系列包括两名患者Th7-8,一名患者Th9-10,一名患者Th11-12)。手术适应症包括磁共振成像(MRI)和CT上钙化的胸椎椎间盘,椎管狭窄直径>50%,顽固性疼痛,和神经缺陷,以及脊髓病的MRI征象.五名患者有轻瘫和共济失调,一名患者没有赤字。所有手术均通过经胸胸膜入路在侧卧位进行(左侧五个)。在放置参考阵列后进行自动配准的CT,具有很高的配准精度。使用基于显微镜的AR,具有感兴趣的分段结构,如椎体,光盘空间,椎间盘突出,还有硬脑膜囊.平均手术时间为277.5±156分钟。在手术领域使用AR改进的定向进行识别,并量身定制了突出椎间盘的切除和硬膜囊的病程鉴定。对照iCT扫描证实5例患者完全切除,1例患者椎间盘突出不完全切除。在一个病人中,并发症发生,如术后血肿,出现伤口愈合缺陷。平均随访时间为22.9±16.5个月。五名患者在手术后有所改善,一名没有赤字的患者保持不变。结论:对钙化性胸椎间盘疾病伴硬膜囊压迫和脊髓病变的患者,通过经胸胸膜入路切除了最佳的手术治疗。基于iCT的配准和基于显微镜的AR的使用显着改善了手术领域的定向,并促进了这些病变的安全切除。
    Background and Objectives: The aim of this study is to present our experience in the surgical treatment of calcified thoracic herniated disc disease via a transthoracic approach in the lateral position with the use of intraoperative computed tomography (iCT) and augmented reality (AR). Materials and Methods: All patients who underwent surgery for calcified thoracic herniated disc via a transthoracic transpleural approach at our Department using iCT and microscope-based AR were included in the study. Results: Six consecutive patients (five female, median age 53.2 ± 6.4 years) with calcified herniated thoracic discs (two patients Th 10-11 level, two patients Th 7-8, one patient Th 9-10, one patient Th 11-12) were included in this case series. Indication for surgery included evidence of a calcified thoracic disc on magnet resonance imaging (MRI) and CT with spinal canal stenosis of >50% of diameter, intractable pain, and neurological deficits, as well as MRI-signs of myelopathy. Five patients had paraparesis and ataxia, and one patient had no deficit. All surgeries were performed in the lateral position via a transthoracic transpleural approach (Five from left side). CT for automatic registration was performed following the placement of the reference array, with a high registration accuracy. Microscope-based AR was used, with segmented structures of interest such as vertebral bodies, disc space, herniated disc, and dural sac. Mean operative time was 277.5 ± 156 min. The use of AR improved orientation in the operative field for identification, and tailored the resection of the herniated disc and the identification of the course of dural sac. A control-iCT scan confirmed the complete resection in five patients and incomplete resection of the herniated disc in one patient. In one patient, complications occurred, such as postoperative hematoma, and wound healing deficit occurred. Mean follow-up was 22.9 ± 16.5 months. Five patients improved following surgery, and one patient who had no deficits remained unchanged. Conclusions: Optimal surgical therapy in patients with calcified thoracic disc disease with compression of dural sac and myelopathy was resectioned via a transthoracic transpleural approach. The use of iCT-based registration and microscope-based AR significantly improved orientation in the operative field and facilitated safe resection of these lesions.
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  • 文章类型: Journal Article
    目的:经皮内镜经椎间孔髓核摘除术(PELD)是治疗腰椎间盘突出症(LDH)的一种新型微创脊柱手术。根据3年的随访数据,通过回顾性队列研究分析PELD对LDH患者临床结局的影响,从而为临床选择手术方案提供指导。
    方法:回顾性分析我院2019年1月至2020年10月收治的150例LDH患者的临床资料。根据病历系统中记录的手术方法,将患者分为开放腰椎显微椎间盘切除术(OLM)组(n=50)和PELD组(n=100)。匹配后比较两组患者的手术及术后恢复指标。这些包括切口长度,术中失血,操作时间,术后下床时间和住院时间,回收率,短期并发症发生率,腰椎视觉模拟量表(VAS)评分,和Oswestry残疾指数(ODI)得分。
    结果:与OLM组相比,PELD组切口长度较短,更短的操作时间,术后下床时间短,缩短住院时间,术中失血少,短期并发症发生率较低,3个月时腰部疼痛和功能障碍评分,6个月,手术后1年,较高的短期良好回收率,术后3年生活质量评分较高(p<0.05)。
    结论:与OLM相比,PELD治疗LDH患者可减少手术时间,失血,以及住院时间,提示术后短期恢复效果。与OLM相比,PELD还可以降低短期并发症的发生率,增强疼痛控制效果和改善中期功能障碍,并提高长期生活质量。
    OBJECTIVE: Percutaneous endoscopic transforaminal discectomy (PELD) is a new minimally invasive spine surgery for patients with lumbar disc herniation (LDH). Based on the 3-year follow-up data, the effect of PELD on the clinical outcomes of patients with LDH through a retrospective cohort study was analyzed in this article, so as to provide guidance for clinical selection of surgical options.
    METHODS: The clinical data of 150 patients with LDH admitted to our hospital from January 2019 to October 2020 were retrospectively analyzed. According to the surgical methods recorded in the medical record system, the patients were divided into the open lumbar microdiscectomy (OLM) group (n = 50) and the PELD group (n = 100). The surgical and postoperative recovery indicators of the two groups were compared after matching. These included incision length, intraoperative blood loss, operation time, postoperative ambulation time and hospital stays, recovery rate, short-term complication rate, Lumbar visual analogue scale (VAS) score, and Oswestry Disability Index (ODI) score.
    RESULTS: Compared with the OLM group, the PELD group had shorter incision length, shorter operation time, shorter postoperative ambulation time, shorter hospital stays, less intraoperative blood loss, lower short-term complication rate, lower lumbar pain and dysfunction scores at 3 months, 6 months, and 1 year after operation, higher short-term excellent-and-good recovery rate, and higher quality-of-life scores at 3 years after operation (p < 0.05).
    CONCLUSIONS: Compared with OLM, PELD in the treatment of LDH patients can reduce the operation time, blood loss, and length of hospital stays, suggesting a short-term postoperative recovery effect. Compared with OLM, PELD can also reduce the incidence of short-term complications, enhance the effect of pain control and improvement of dysfunction in the medium term, and improve the long-term quality of life.
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  • 文章类型: Journal Article
    背景:通过杠杆定位手法(LPM)可以有效改善腰椎间盘突出症(LDH)的临床症状,这与大脑的疼痛调节机制密切相关。磁共振成像(MRI)提供了一种客观和视觉的手段来研究大脑如何协调镇痛效果的特征。从多模态MRI的角度来看,应用功能磁共振成像(fMRI)和磁共振波谱(MRS)技术,从脑结构方面综合评价LPM对LDH脑区的影响特点,脑功能和脑代谢。这种多模态MRI技术为LPM在LDH中的临床应用提供了生物学基础。
    方法:共60例LDH患者和30例健康对照,与性别相匹配,年龄,和多年的教育,将参加这项研究。使用随机数字表法将LDH患者分为两组(第1组,n=30;第2组,n=30)。第1组将每两天接受一次LPM治疗,在4周内共12次。第2组将在与第1组相同的时期内接受假LPM治疗。所有30名健康对照将被分为第3组。将在三个时间点(TP)对第1组和第2组进行多模态MRI:在LPM之前(TP1),在一个LPM会话(TP2)之后,经过整个疗程的LPM治疗。健康对照(组3)将不经历LPM并且将仅经受单个多模态MRI扫描。第1组和第2组的参与者将被要求完成临床问卷。这些评估将侧重于疼痛强度和功能障碍,使用视觉模拟量表(VAS)和日本骨科协会(JOA)评分系统,分别。
    结论:本研究的目的是探讨LDH患者LPM治疗后的多模态脑反应特征,目的是为临床应用提供生物学基础。
    背景:https://clinicaltrials.gov/ct2/show/NCT05613179,标识符:NCT05613179。
    BACKGROUND: The clinical symptoms of Lumbar Disc Herniation (LDH) can be effectively ameliorated through Lever Positioning Manipulation (LPM), which is closely linked to the brain\'s pain-regulating mechanisms. Magnetic Resonance Imaging (MRI) offers an objective and visual means to study how the brain orchestrates the characteristics of analgesic effects. From the perspective of multimodal MRI, we applied functional MRI (fMRI) and Magnetic Resonance Spectrum (MRS) techniques to comprehensively evaluate the characteristics of the effects of LPM on the brain region of LDH from the aspects of brain structure, brain function and brain metabolism. This multimodal MRI technique provides a biological basis for the clinical application of LPM in LDH.
    METHODS: A total of 60 LDH patients and 30 healthy controls, matched by gender, age, and years of education, will be enrolled in this study. The LDH patients will be divided into two groups (Group 1, n = 30; Group 2, n = 30) using a random number table method. Group 1 will receive LPM treatment once every two days, for a total of 12 times over 4 weeks. Group 2 will receive sham LPM treatment during the same period as Group 1. All 30 healthy controls will be divided into Group 3. Multimodal MRI will be performed on Group 1 and Group 2 at three time points (TPs): before LPM (TP1), after one LPM session (TP2), and after a full course of LPM treatment. The healthy controls (Group 3) will not undergo LPM and will be subject to only a single multimodal MRI scan. Participants in both Group 1 and Group 2 will be required to complete clinical questionnaires. These assessments will focus on pain intensity and functional disorders, using the Visual Analog Scale (VAS) and the Japanese Orthopaedic Association (JOA) scoring systems, respectively.
    CONCLUSIONS: The purpose of this study is to investigate the multimodal brain response characteristics of LDH patients after treatment with LPM, with the goal of providing a biological basis for clinical applications.
    BACKGROUND: https://clinicaltrials.gov/ct2/show/NCT05613179 , identifier: NCT05613179.
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  • 文章类型: Journal Article
    椎间盘突出症,定义为椎间盘块在椎间盘空间外的突出或挤压,在常规磁共振成像(MRI)或计算机断层扫描(CT)扫描中很常见且易于诊断。然而,被隔离的椎间盘碎片很难检测,椎间盘肿块移位进入硬膜囊,这可能导致严重的神经系统问题,如马尾综合症(CES)。隔离的椎间盘碎片没有特定的临床或放射学特征,可以区分非典型椎间盘肿块和肿瘤。使术前诊断困难。在这里,我们描述了在磁共振成像(3DSPACEMRI)中使用不同翻转角演变的应用优化对比剂采样完美在模拟肿瘤的椎间盘碎片诊断中的应用。
    在这项研究中,我们报告2例隔离型腰椎间盘突出症。首例为37岁患者,有2年间歇性左下肢疼痛病史,随运动加重,休息时缓解,而第二例是一名42岁的患者,有40天的左侧下肢麻木和疼痛的病史。
    3DSPACEMRI是一种有益的诊断成像工具,用于区分模拟肿瘤的椎间盘肿块和手术前的肿瘤。如果在手术前可以识别出模仿肿瘤的椎间盘碎片,并不是所有患者都必须进行开腹手术治疗。
    UNASSIGNED: Intervertebral disc herniation, defined as the protrusion or extrusion of the disc mass outside the disc space, is common and easy to diagnose on conventional Magnetic Resonance imaging (MRI) or Computed Tomography (CT) scans. However, the sequestrated disc fragments are challenging to detect, and intervertebral disc mass displacement into the dural sac, which can lead to serious neurological problems such as Cauda equina syndrome (CES). The sequestrated disc fragments do not have specific clinical or radiological characteristics that can differentiate an atypical disc mass from a tumor, making the diagnosis difficult preoperatively. Herein, we describe the use of Sampling Perfection with Application Optimized Contrast using different flip angle Evolution in Magnetic Resonance Imaging (3D SPACE MRI) in the diagnosis of the intervertebral disc fragment that mimicked a tumor.
    UNASSIGNED: In this study, we report two cases of sequestered lumbar disc herniation. The first case was a 37-year-old patient with a 2-year history of intermittent left lower limb pain that aggravates with exercise and is relieved at rest, while the second case was a 42-year-old patient with a history of 40 days of numbness and pain in the left lower limb.
    UNASSIGNED: 3D SPACE MRI is a beneficial diagnostic imaging tool for discriminating between disc mass that mimics a tumor and a tumor before surgery. If the disc fragment mimicking a tumor can be identified before the operation, open surgical treatment won\'t be necessary for all patients.
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  • 文章类型: Journal Article
    目的:通过有限元分析研究不同体位压迫技术对腰椎间盘突出症(LDH)三维模型的生物力学影响。
    方法:一名48岁女性LDH患者的腰椎CT图像(身高163厘米,称重53公斤)。模仿20.0,Geomagic工作室,利用Solidwords等软件建立LDH在L4,5段上的三维有限元模型。水平位置下的压缩技术,分别模拟了30°向前弯曲和10°向后延伸。施加压力后,不同位置下的压缩技术对应力的影响,观察椎间盘和神经根各种组织的应变和位移。
    结果:L4,5段有限元模型成功建立,并对模型进行了验证。当在水平位置上执行压缩操作时,30°屈曲和10°伸展,环面应力分别为0.732,5.929,1.286MPa,髓核应力分别为0.190,1.527,0.295MPa,环应变分别为0.097、0.922和0.424,髓核应变大小分别为0.153、1.222和0.282。椎间盘在Y方向上的整体位移距离分别为-3.707、-18.990、-4.171mm,Y向神经根位移距离分别为+7.836,+5.341,+3.859mm,分别。Y向神经根与椎间盘的相对位移距离分别为11.543、24.331和8.030mm,分别。
    结论:压迫手法可使突出的椎间盘产生收缩和回缩趋势,通过增加椎间盘突出和神经根之间的距离,为了减轻神经压迫的症状,达到LDH患者治疗的目的,其中当前屈为30°时,压缩操作更有效。
    OBJECTIVE: To campare biomechanical effects of different postural compression techniques on three-dimensional model of lumbar disc herniation (LDH) by finite element analysis.
    METHODS: Lumbar CT image of a 48-year-old female patient with LDH (heighted 163 cm, weighted 53 kg) was collected. Mimics 20.0, Geomagic Studio, Solidwords and other software were used to establish three-dimensional finite element model of LDH on L4,5 segments. Compression techniques under horizontal position, 30° forward bending and 10° backward extension were simulated respectively. After applying the pressure, the effects of compression techniques under different positions on stress, strain and displacement of various tissues of intervertebral disc and nerve root were observed.
    RESULTS: L4, 5 segment finite element model was successfully established, and the model was validated. When compression manipulation was performed on the horizontal position, 30° flexion and 10° extension, the annular stress were 0.732, 5.929, 1.286 MPa, the nucleus pulposus stress were 0.190, 1.527, 0.295 MPa, and the annular strain were 0.097, 0.922 and 0.424, the strain sizes of nucleus pulposus were 0.153, 1.222 and 0.282, respectively. The overall displacement distance of intervertebral disc on Y direction were -3.707, -18.990, -4.171 mm, and displacement distance of nerve root on Y direction were +7.836, +5.341, +3.859 mm, respectively. The relative displacement distances of nerve root and intervertebral disc on Y direction were 11.543, 24.331 and 8.030 mm, respectively.
    CONCLUSIONS: Compression manipulation could make herniated intervertebral disc produce contraction and retraction trend, by increasing the distance between herniated intervertebral disc and nerve root, to reduce symptoms of nerve compression, to achieve purpose of treatment for patients with LDH, in which the compression manipulation is more effective when the forward flexion is 30°.
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