非对称回波最小二乘估算法水脂迭代分离量化序列(IDEAL-IQ)诊断多发性骨髓瘤骨病

目的 分析非对称回波最小二乘估算法水脂迭代分离量化序列(IDEAL-IQ)对多发性骨髓瘤骨病(MMBD)的诊断价值。方法 30例MMBD患者(病例组)及30名健康志愿者(对照组)均接受腰椎MR检查,包括矢状位T1WI、T2WI及IDEAL-IQ序列。对比2组间T1WI信号(S_T1WI)、T2WI信号(S_T2WI)、脂肪分数(FF)、脂肪信号(S_Fat)及水信号(S_Water)差异,采用受试者工作特征曲线分析各MRI参数对MMBD的诊断效能。结果 病例组S_T1WI、FF及S_Fat均低于、S_T2WI、S_Water均高于对照组(P均＜0.01)。S_T1WI、S_T2WI、FF、S_Fat及S_Water诊断MMBD曲线下面积分别为0.93、0.84、0.98、0.95及0.83;FF诊断效能优于S_T2WI及S_Water(P=0.02、0.01)。结论 IDEAL-IQ可有效诊断MMBD,尤以定量参数FF的诊断效能更优。     

T2WI、DWI及ADC图多序列影像组学模型评估直肠癌淋巴结转移

目的 观察基于术前MR T2WI、弥散加权成像(DWI)及表观弥散系数(ADC)图多序列影像组学模型评估直肠癌淋巴结转移的价值。方法 回顾性分析74例经术后病理确诊单发直肠癌患者的T2WI、DWI和ADC图,按照7∶3比例将其分为训练集(n=52,21例淋巴结转移、31例无淋巴结转移)和测试集(n=22,9例淋巴结转移、13例无淋巴结转移)。由2名影像科医师以病理结果为标准基于常规MRI评价淋巴结转移,评估其诊断效能;分别基于T2WI、DWI、ADC图及三者联合提取病灶影像组学特征,筛选后构建影像组学模型,包括T2WI模型、DWI模型、ADC模型及多序列模型,并于训练集进行训练,于测试集评估其效能。绘制受试者工作特征(ROC)曲线,计算曲线下面积(AUC),观察各模型诊断直肠癌淋巴结转移的效能。结果 训练集与测试集患者性别、年龄、病灶位置、T分期及N分期差异均无统计学意义(P均＞0.05)。常规MRI评估直肠癌淋巴结转移的准确率为58.11%(43/74),敏感度和特异度分别为76.67%(23/30)和45.45%(20/44)。T2WI、DWI、ADC及多序列模型评估测试集直肠癌淋巴结转移的AUC分别为0.78、0.68、0.77及 0.82,后者的准确率、敏感度及特异度分别为86.36%、88.89%及84.62%。结论 术前基于MR T2WI、DWI及ADC图多序列影像组学模型能有效评估直肠癌淋巴结转移。     

3D ResNet深度学习模型自动甄别前列腺多参数MR扫描序列:多中心研究

目的 构建基于前列腺多参数MRI(mpMRI)自动甄别其主要扫描序列的3D ResNet深度学习模型,并评估其价值。方法 收集于3个医疗中心接受超声引导下前列腺穿刺的1 086例患者穿刺前1 153次前列腺mpMRI资料,并按不同扫描序列加以拆分,分别将T2WI、弥散加权成像(DWI)及表观弥散系数(ADC)图归入相应数据集,共获得5 151组图像,并将归类为非脂肪抑制T2WI(T2WI_nan,n=1 000)、脂肪抑制T2WI(T2WI_fs,n=1 188)、高b值DWI(DWI_High,b值≥500 s/mm²,n=1 045)、低b值DWI(DWI_Low,b值＜500 s/mm²,n=1 012)及ADC图(ADC map,n=906)。按8 ∶ 1 ∶ 1比例将全部图像分为训练集(n=4 122)、验证集(n=513)和测试集(n=516)。行预处理及扩增后,采用3D ResNet于训练集及验证集训练及优化自动甄别图像类别模型,以测试集评估模型分类效能。结果 所获模型分类测试集不同序列图像的准确率、敏感度、特异度、阳性预测值、阴性预测值、F1值及Kappa值分别为0.995~1.000、0.990~1.000、0.998~1.000、0.990~1.000、0.998~1.000、0.995~1000、0.994~1.000。结论 3D ResNet深度学习模型能有效自动甄别前列腺mpMRI所涉主要扫描序列。     

平扫及钆塞酸二钠增强MRI鉴别诊断透明细胞型与普通型肝细胞癌

目的 探讨平扫及钆塞酸二钠（Gd-EOB-DTPA）增强MRI对鉴别诊断透明细胞型肝细胞癌（CCHCC）与普通型肝细胞癌（NOS-HCC）的价值。方法 纳入经手术病理证实的36例CCHCC（CCHCC组）和72例年龄匹配的NOS-HCC患者（NOS-HCC组）,以单因素及分析多因素logistic回归分析回顾性评估其临床、病理及上腹部平扫+Gd-EOB-DTPA增强MRI,筛选鉴别CCHCC与NOS-HCC的独立预测因素;绘制受试者工作特征（ROC）曲线,计算曲线下面积（AUC）,评价MRI相关独立预测因素及其联合鉴别CCHCC与NOS-HCC的效能。结果 病理Edmondson-Steiner分级及MRI见病灶含脂肪成分、平扫T1WI病灶与肝脏信号强度比值（LLR_T1WI）及病灶与肌肉信号强度比值（LMR_T1WI）均为CCHCC与NOS-HCC的独立预测因素（P均<0.05）。以病灶含脂肪成分及LLR_T1WI、LMR_T1WI鉴别CCHCC与NOS-HCC的AUC分别为0.652、0.689、0.687,三者联合的AUC为0.762,高于单一病灶内含脂肪成分（Z=-2.401,P=0.016）,而与单一LLR_T1WI（Z=-1.841,P=0.066）及LMR_T1WI（Z=-1.440,P=0.150）差异均无统计学意义。结论 平扫及Gd-EOB-DTPA增强MRI可用于鉴别CCHCC与NOS-HCC。     

优化选择高和超高b值直肠癌弥散加权成像

目的 比较高和超高b值弥散加权成像（DWI）图像质量和显示直肠癌效果，优化选择b值。方法 对58例直肠腺癌患者行多个b值（800、1 000、1 500、2 000 s/mm²）DWI扫描（DWI₈₀₀、DWI_{1 000}、DWI_{1 500}、DWI_{2 000}），对比图像质量和病变信号强度分级，测量并比较不同b值下肿瘤信噪比（SNR）、对比度噪声比（CNR）和信号强度比（SIR）。结果 DWI₈₀₀、DWI_{1 000}、DWI_{1 500}及DWI_{2 000}图像质量评分差异均有统计学意义（P<0.001），且DWI₈₀₀、DWI_{1 000}、DWI_{1 500}图像质量评分呈升高趋势，DWI_{1 000}与DWI_{1 500}间差异有统计学意义（P<0.001）。DWI₈₀₀、DWI_{1 000}、DWI_{1 500}图像信号强度为Ⅰ型者逐渐增多、Ⅱ型逐渐减少（P均<0.001），DWI_{1 500}图像中无Ⅲ型信号；DWI_{2 000}图像中Ⅰ型信号略少于DWI_{1 500}，差异无统计学意义（P=0.096）。随b值升高，SNR、CNR和SIR均逐渐降低（P均<0.001）。结论 b值为800、1 000、1 500、2 000 s/mm²的DWI图像中，b=1 500 s/mm²时图像质量最优，显示直肠癌病灶最佳。     

不同压缩感知加速因子对头部3D-T1WI成像质量及基于体素的形态测量定量参数的影响

目的 观察不同压缩感知（CS）加速因子对头部3D-T1WI及基于体素的形态测量（VBM）定量参数的影响,筛选CS最佳加速因子。方法 对25名成人健康志愿者分别以敏感性编码（SENSE）技术（相位加速因子为3）和不同加速因子（4、6、8、10） CS技术采集头部3D-T1WI,测量3D-T1WI_SENSE3、3D-T1WI_CS4、3D-T1WI_CS6、3D-T1WI_CS8及3D-T1WI_CS10中的双侧尾状核灰质及胼胝体膝、压部和颅脑顶部白质信号强度（SI）及标准差（SD）,计算图像信噪比（SNR）和对比噪声比（CNR）,对图像质量进行主观评分;并行VBM,获得全脑体积（TIV）、灰质体积（GMV）、白质体积（WMV）及脑脊液体积（CSFV）,比较各3D-T1WI的SNR、CNR、主观评分及VBM定量参数的差异。结果 不同3D-T1WI的SNR、CNR及主观评分差异均有统计学意义（P均<0.05）;两两比较,3D-T1WI_CS6与3D-T1WI_SENSE3的SNR、CNR,3D-T1WI_CS4及3D-T1WI_CS6与3D-T1WI_SENSE3主观评分差异均无统计学意义（P均>0.05）,其余图像的SNR、CNR及主观评分差异均有统计学意义（P均<0.05）。基于各3D-T1WI的VBM定量参数TIV、GMV、WMV及CSFV差异均无统计学意义（P均>0.05）。结论 以CS技术采集头部3D-T1WI可在保证成像质量且不影响VBM结果的前提下缩短扫描时间;CS6为最佳加速因子。     

基于T2加权成像及弥散加权成像的图像纹理分析预测宫颈鳞状细胞癌放化疗疗效的临床价值

  目的  探讨MRI检查T2加权成像(T2-weighted imaging, T2WI)及弥散加权成像(diffusion-weighted imaging, DWI)图像纹理参数与宫颈鳞状细胞癌放化疗疗效的相关性。  方法  回顾性纳入2015年2月至2016年1月北京协和医院接受放化疗的宫颈鳞状细胞癌患者,并根据其预后分为疾病进展组和疾病稳定组。采用TexRAD软件对两组患者放化疗前T2WI、DWI序列图像进行纹理分析,得到空间尺度滤波器(spatial scale filter,SSF)半径值为2、4、6的图像纹理参数。比较两组患者图像纹理参数差异,采用多因素Cox回归分析图像纹理参数与宫颈鳞状细胞癌患者放化疗疗效的相关性。采用受试者工作特征(receiver operating characteristic, ROC)曲线分析各图像纹理参数预测宫颈鳞状细胞癌放化疗后疾病进展的性能。  结果  共121例符合纳入和排除标准的宫颈鳞状细胞癌患者入选本研究。其中疾病进展组46例,疾病稳定组75例。T2WI序列图像中,疾病进展组与疾病稳定组患者的图像纹理参数均值(SSF2、SSF4、SSF6)、偏度(SSF2、SSF4)、熵(SSF4、SSF6)均有显著性差异(P均<0.05);DWI序列图像中,疾病进展组与疾病稳定组患者的图像纹理参数均值(SSF2、SSF4、SSF6)、偏度(SSF4、SSF6)、峰度(SSF2、SSF4)均有显著性差异(P均<0.05)。多因素Cox回归分析结果显示,T2WI序列图像纹理参数均值(SSF2、SSF4、SSF6)及DWI序列图像纹理参数均值(SSF2、SSF6)、熵(SSF2、SSF4、SSF6)、偏度(SSF4、SSF6)与宫颈鳞状细胞癌放化疗疗效具有相关性(P<0.05)。ROC曲线分析结果显示,图像纹理参数均值(T2WI-SSF2、T2WI-SSF4、T2WI-SSF6、DWI-SSF2、DWI-SSF6)、偏度(DWI-SSF6)可预测宫颈鳞状细胞癌放化疗后的疾病进展,曲线下面积(area under the curve, AUC)为0.625~0.746。其中,均值(T2WI-SSF4)的预测效能最高(AUC:0.746),其次为均值(T2WI-SSF2,AUC:0.725)、均值(T2WI-SSF6,AUC:0.703)。  结论  基线MRI检查T2WI、DWI图像纹理参数与宫颈鳞状细胞癌放化疗疗效具有相关性,其均值、偏度可预测宫颈鳞状细胞癌放化疗后疾病进展,且以均值的预测效能最高。     

多序列MRI纹理分析预测宫颈癌新辅助化学治疗疗效

目的 观察不同序列MRI纹理特征分析预测宫颈癌新辅助化学治疗（NACT）疗效的价值。方法 回顾性分析32例接受NACT的宫颈癌患者，于NACT开始前及结束后各行1次盆腔MR，根据实体瘤疗效评价标准（RECIST）将患者分为有效组（完全缓解和部分缓解）及无效组（疾病稳定和疾病进展）。于治疗前MR T2WI、DWI及增强图像上分别勾画ROI，获得纹理参数，每组图像共采集106个纹理特征，比较2组参数差异。对每组选取诊断效能较高且相关性小的纹理特征参数进行Logistic回归分析，获得综合参数；绘制受试者工作特征（ROC）曲线，得到各序列单因素及回归模型的预测价值，并对各序列进行比较。结果 治疗前T2WI、DWI和增强图像纹理特征中，分别有22、13和36个组间差异存在统计学意义（P均<0.05）；T2WI、DWI和增强图像单个纹理特征预测宫颈癌NACT效果的ROC曲线下面积（AUC）分别为0.609~0.839、0.745~0.813及0.552~0.786，综合模型预测疗效的AUC分别为0.839、0.885及0.766。结论 不同序列MRI纹理分析预测NACT对于宫颈癌的疗效具有较高价值，以DWI最佳。     

磁共振DWI结合标准T2WI判断直肠癌局部复发

目的 评价MR DWI结合标准T2WI判断直肠癌局部复发的价值。方法 对325例直肠癌患者术后随访期间均行MR轴位、冠状位、矢状位T2W和轴位DWI（b=0、1000 s/mm²）;其中89例存在盆腔异常表现,2名医师（观察者1、2）分别采用两种方法（T2WI、DWI+T2WI）进行阅片,探讨DWI+T2WI对直肠癌局部复发的诊断效能。结果 89例盆腔局部异常表现患者中,32.58%（29/89）为直肠癌局部复发。2名医师单独采用T2WI判断局部复发的准确率分别为85.39%（76/89）、80.90%（72/89）;采用DWI+T2WI的准确率分别达91.01%（81/89）、87.64%（78/89）。DWI+T2WI的ROC曲线下面积均高于T2WI（观察者1：0.907 vs 0.856;观察者2：0.882 vs 0.823）。采用T2WI时,2名阅片者的一致性良好（Kappa=0.674）;采用DWI+T2WI时,一致性非常好（Kappa=0.831）。结论 标准T2WI诊断直肠癌术后局部复发的准确率较高,结合DWI可进一步提高诊断效能。     

常规MRI纹理分析鉴别诊断眼眶淋巴瘤与炎性假瘤

目的 探讨常规MRI纹理分析在眼眶淋巴瘤和炎性假瘤鉴别诊断中的应用价值。方法 回顾性分析经病理或治疗随访证实的15例眼眶淋巴瘤及17例炎性假瘤患者的MRI资料。应用MaZda软件手工勾画ROI,并提取T1WI、脂肪抑制T2WI及脂肪抑制T1WI增强扫描图像中病变的纹理特征。通过Fisher系数、分类错误概率联合平均相关系数（POE+ACC）、交互信息（MI）及三者联合（FPM）的方法选择最佳纹理参数集合。使用线性判别分析（LDA）和非线性判别分析（NDA）进行纹理分类。比较最佳分类序列上两种病变的纹理特征差异。结果 T1WI及T2WI最佳纹理参数主要源于共生矩阵及游程矩阵,增强T1WI最佳纹理参数主要源于共生矩阵及直方图。T2WI纹理特征鉴别眼眶淋巴瘤及炎性假瘤能力最佳,其中FPM选择纹理特征联合NDA分类的误判率最低,为1.56%。眼眶淋巴瘤T2WI纹理特征参数中的能量及长游程补偿均高于炎性假瘤（P均<0.005）,而熵及短游程补偿均低于炎性假瘤（P均<0.005）。结论 常规MR图像纹理分析可用于鉴别眼眶淋巴瘤和炎性假瘤。     

Guns and Knives in New Mexico: Patterns of Penetrating Trauma, 1978–1993

Objective: To identify patterns of nonfatal and fatal penetrating trauma among children and adults in New Mexico using ED and medical examiner data.
Methods: The authors retrospectively sampled in 5-year intervals all victims of penetrating trauma who presented to either the state Level-1 trauma center or the state medical examiner from a 16-year period (1978–1993). Rates of nonfatal and fatal firearm and stabbing injury were compared for children and adults.
Results: Rates of nonfatal injury were similar (firearm, 34.3 per 100,000 person-years; stabbing, 35.1). However, rates of fatal injury were significantly different (firearm, 21.9; stabbing, 2.7; relative risk: 8.2; 95% confidence interval: 5.4, 12.5). From 1978 to 1993, nonfatal injury rates increased for children (p = 0.0043) and adults (p < 0.0001), while fatal penetrating injury remained constant. The increase in nonfatal injury in children resulted from increased firearm injury rates. In adults, both stabbing and firearm nonfatal injury rates increased.
Conclusions: Nonfatal injury data suggest that nonfatal violence has increased; fatal injury data suggest that violent death rates have remained constant. Injury patterns vary by age, mechanism of trauma, and data source. These results suggest that ED and medical examiner data differ and that both are needed to guide injury prevention programs.     

Interprofessional approaches to creating safe,high quality health care

Three supplementary perspectives are presented arguing that interprofessional collaboration is both necessary and desirable. Nonetheless, there are often too many serious intra-professional barriers and obstacles to interprofessional collaboration to make it successful. Some of these barriers, it is argued and illustrated, are found in the multiple ways in which professional identity is tacitly acquired and embodied in the practitioners' habitual, everyday practice. The paper then explores ways in which reflection, especially Second order reflection, can help to elucidate and overcome these obstacles, as well as increasing professional adaptability and competence.     

Systematic Reviews Published in the January 2011 Issue of The Cochrane Library

ABSTRACT

The Cochrane Library of Systematic Reviews is published quarterly as a DVD and monthly online. The January 2011 issue (first quarterly DVD for 2011) contains 4515 complete reviews, 1985 protocols for reviews in production, and 13,521 one-page summaries of systematic reviews published in the general medical literature. In addition, there are citations of 641,000 randomized controlled trials, and 14,018 cited papers in the Cochrane methodology register. The health technology assessment database contains over 9300 citations. One hundred and seven new reviews have been published in the last 3 months, of which five have potential relevance for practitioners in pain and palliative medicine.     

Determination of creatine kinase isoenzyme MB activity in serum using immunological inhibition of creatine kinase M subunit activity. Activity kinetics and diagnostic significance in myocardial infarction.

This is a new method for the determination of creatine kinase isoenzyme MB activity in serum. The method uses direct activity measurement of creatine kinase B subunit activity after blocking of CK-M subunit activity by inhibiting antibodies. The test takes no longer than 15 min. The method yields an intra-serial C.V. of 2.0-12.9%, and a C.V. from day to day of 5.5%. The detection limit is 3.4 U/l creatine kinase MB. In the 95 cases with proven myocardial infarction several types of creatine kinase MB activity kinetics could be determined. The percentage of creatine kinase MB of peak CK-total is 6-25%, with a mean of 11.1%. The amount of creatine kinase MB with respect to total CK activity after reinfarction is higher than the amount after initial infarction.     

俯卧位通气对高海拔地区肺复张治疗无效急性呼吸窘迫综合征患者氧合的影响

目的 探讨俯卧位通气对高海拔地区肺复张术(RM)治疗无效急性呼吸窘迫综合征(ARDS)患者的治疗作用.方法 从海拔2260m的地区医院筛选RM治疗无效的41例ARDS患者[平均氧合指数( PaO2/FiO2)较RM前升高＜20％视为RM无效],依不同病因分为肺内源性ARDS组(ARDSp组)和肺外源性ARDS组(ARDSexp组),每组再按信封法随机分为俯卧位组和仰卧位组,即ARDSp俯卧位组(11例)、ARDSp仰卧位组(9例)、ARDSexp俯卧位组(10例)、ARDSexp仰卧位组(11例).在通气前及通气1、2、3、4h监测动脉血氧分压( PaO2)、PaO2/FiO2、静态顺应性(Cst)、气道阻力(Raw)的变化.结果 通气lh时,ARDSexp俯卧位组PaO2/FiO2( mm Hg,l mm Hg=0.133 kPa)即较通气前显著升高(157.4±40.6比129.3±48.7,P＜0.05),并随通气时间延长呈持续增高趋势,4h达峰值(219.1 ±41.1);且ARDSexp俯卧位组通气3h内PaO2/FiO2较其他3组显著增高,另3组间则差异无统计学意义.ARDSp俯卧位组、ARDSexp俯卧位组通气4h时PaO2/FiO2均较相应仰卧位组显著增高(208.8±39.7比127.4±47.1,219.1±41.1比124.9±50.8,均P＜0.05).4组通气前后Cst无显著改变,各组间差异也无统计学意义.ARDSp俯卧位组通气4h时Raw(cmH2O·L-1·s-1)较通气前显著降低(6.8±1.7比10.7±1.8,P＜0.05),且明显低于其他3组;其他3组各时间点Raw组内及组间比较差异均无统计学意义.结论 俯卧位通气作为ARDS机械通气重要策略之一,可以改善RM无效高原ARDS患者的氧合,为抢救患者赢得宝贵的时间.     

Digital imaging among medical facilities

The Department of Veterans Affairs (VA) in the USA operates a network of 172 medical centres which all utilize a hospital information system (HIS) which has been developed and is currently maintained by the VA. During the past several years, an image management and communication module has been developed, installed and clinically utilized at the Washington DC and Maryland VA Medical Centres. This image management and communication system, referred to as the decentralized hospital computer program (DHCP) imaging system, is fully integrated with a commercial picture archiving and communication system (PACS). The system is utilized to capture, archive, and display all images generated within the hospital including radiology, nuclear medicine, pathology, endoscopy, bronchoscopy, and dermatology, intraoperative photographs, ECG data, and a limited number of paper documents. The ultimate goal of the project is to have all patient text and image data available at any clinical workstation to any authorized user anywhere within the network of medical centres. Clinical requirements for an imaging workstation include ease of use, rapid and reliable access to the complete set of patient information, and images which are of acceptable quality to meet the requirements of the user and the subspecialty. Patient confidentiality and data security must be safeguarded at all times. Integration of the images with the remainder of the patient's database was found to be critical to the success of the project. The experience at the Washington and Maryland facilities suggests that an imaging system that is successfully integrated with a hospital information system can provide substantial clinical and economic benefits both within and among medical centres. Clinical acceptance and utilization of the system has been excellent, particularly in diagnostic radiology where DHCP Imaging has been interfaced to a commercial PAC system. Based upon this initial experience, the VA has begun to deploy the system throughout its large network of medical centres.     

Myocardial elastography at both high temporal and spatial resolution for the detection of infarcts

Myocardial elastography is a novel method for noninvasively assessing regional myocardial function, with the advantages of high spatial and temporal resolution and high signal-to-noise ratio (SNR). In this paper, in-vivo experiments were performed in anesthetized normal and infarcted mice (one day after left anterior descending coronary artery [LAD] ligation) using a high-resolution (30 MHz) ultrasound system (Vevo 770, VisualSonics Inc., Toronto, ON, Canada). Radiofrequency (RF) signals of the left ventricle (LV) in longitudinal (long-axis) view and the associated electrocardiogram (ECG) were simultaneously acquired. Using a retrospective ECG gating technique, 2-D full field-of-view RF frames were acquired at an extremely high frame rate (8 kHz) that resulted in high-quality incremental displacement and strain estimation of the myocardium. The incremental results were further accumulated to obtain the cumulative displacements and strains. Two-dimensional and M-mode displacement images and strain images (elastograms), as well as displacement and strain profiles as a function of time, were compared between normal and infarcted mice. Incremental results clearly depicted cardiac events including LV contraction, LV relaxation and isovolumetric phases in both normal and infarcted mice, and also evidently indicated reduced motion and deformation in the infarcted myocardium. The elastograms indicated that the infarcted regions underwent thinning during systole rather than thickening, as in the normal case. The cumulative elastograms were found to have higher elastographic SNR (SNR(e)) than the incremental elastograms (e.g., 10.6 vs. 4.7 in a normal myocardium, and 6.0 vs. 2.4 in an infarcted myocardium). Finally, preliminary statistical results from nine normal (m = 9) and seven infarcted (n = 7) mice indicated the capability of the cumulative strain in differentiating infracted from normal myocardia. In conclusion, myocardial elastography could provide regional strain information at simultaneously high temporal (>/=0.125 ms) and spatial ( approximately 55 microm) resolution as well as high precision ( approximately 0.05 microm displacement). This technique was thus capable of accurately characterizing normal myocardial function throughout an entire cardiac cycle, at the same high resolution, and detecting and localizing myocardial infarction in vivo.     

Prise en charge des entorses externes de cheville : étude clinique préliminaire sur l’efficacité du dispositif Myolux™

Ankle sprains are the most common injury of the musculoskeletal system and are associated with significant societal and economic impacts. It has been proven that classical therapeutic strategies may not be effective in preventing recurrent injuries: the recurrence rates reported in the literature can reach 73%. In order to provide an effective rehabilitation solution, a destabilizing orthosis was developed. This device is equipped with a mechanical articulator reproducing the subtalar mechanics and placed under the heel. In this paper, we present the main results of a preliminary clinical study conducted between 2004 and 2007. All subjects included in this study were treated with the abovementioned orthosis during 10 rehabilitation sessions of 30 minutes each. Data show a relatively low recurrence rate of 12% for the overall population. Moreover, it's of primary importance to note that this satisfactory ratio is largely reduced (3% of recurrence rate) for the 29 patients who performed one training session per month after the 10th initial rehabilitation sessions. Hence, the destabilizing orthosis appears to be an effective solution to prevent recurrent ankle sprains. However, joint protection requires long-term and regular training sessions. This result has motivated the development of a similar device allowing patients to perform training sessions at home. Finally, data obtained in this study are promising awaiting the final results of the comparative, multicentric and independent clinical trials currently managed by the Hospices Civils de Lyon.