多层螺旋CT对肠扭转的诊断价值

目的探讨多层螺旋CT(MSCT)对肠扭转的诊断价值。方法收集急腹症MSCT双期增强扫描病例80例,其中10例患者图像经多平面重组(MPR)及肠系膜血管最大密度投影(MIP)处理,诊断为肠扭转。结果MSCT诊断10例肠扭转,主要征象有肠系膜血管“漩涡征”10例,肠管“漩涡征”5例,靶环征或双晕征5例,肠系膜上动脉、静脉(SMA、SMV)换位征3例,鸟喙征4例,SMV血栓形成2例,腹水征10例。诊断均经手术证实。结论MSCT双期增强扫描及多平面重组(MPR)与肠系膜血管最大密度投影(MIP)对肠扭转的诊断有重要价值。     

肠扭转的CT表现

目的 提高螺旋CT诊断肠扭转的正确率。方法 对9例术前CT明确诊断为肠扭转，并经手术证实病例的CT资料进行分析。主要重组方法有多平面重组法（MPR）及滑动薄层块最大强度投影法（STS-MIP）。结果 9例肠扭转诊断均正确，主要征象有肠管的“漩涡征”（6例）和血管的“漩涡征”（9例）、“靶环征”（2例）、“鸟喙征”（6例）。结论 肠系膜血管的“漩涡征”是诊断肠扭转的特异性征象，“靶环征”及肠壁强化减弱、腹水是提示绞窄性梗阻的可靠征象。螺旋CT扫描及重绢对肠扭转的诊断具有莺要价值。     

螺旋CT对肠扭转的诊断价值

目的：探讨螺旋CT对肠扭转的诊断价值。方法：回顾性分析11例术前CT明确诊断并经手术证实为肠扭转的临床及影像资料。结果：11例肠扭转CT均正确诊断,其中6例为360°肠扭转,4例为270°肠扭转,1例为180°肠扭转。除全部11例都有通常的肠梗阻征象外,主要征象还有“漩涡征”（9／11）、“靶环征”（4／11）及“鸟喙征”（10／11）,肠系膜血管也可以形成“漩涡征”（11／11）。结论：螺旋CT对肠扭转具有重要的临床价值,尤其是肠系膜血管的“漩涡征”。     

64层螺旋CT在小肠扭转中的诊断价值

目的探讨64层螺旋CT在小肠扭转中的诊断价值。资料与方法对7例术前CT诊断为小肠扭转,其中5例经手术证实的病例资料进行回顾性分析。主要重组方法为多平面重组(MPR)、最大密度投影(MIP)及容积再现(VR)。结果7例均正确诊断,主要征象有肠管的漩涡征(4例)、血管的漩涡征(6例)、靶环征或双晕征(6例)、鸟喙征(4例)、缆绳征(7例)、肠系膜水肿(7例)、腹腔积液(4例)。结论肠系膜血管的漩涡征是诊断肠扭转的特异性征象。64层螺旋CT扫描及重组图像对小肠扭转显示更直观、明确,具有重要的诊断价值。     

肠扭转的CT诊断(附16例分析)

目的:探讨肠扭转CT平扫的影像学特征.方法:对16例经手术证实的肠扭转患者的CT平扫检查及其影像学表现进行了分析.结果:肠扭转CT平扫的主要征象为:①直接征象:肠袢呈C形15例,肠系膜血管扭曲征16例,远端肠管呈鸟嘴征13例,漩涡征6例;②间接征象:扭转肠袢内积液、积气者14例(其中单纯肠管内积液者6例),近端肠管见液平面者12例,腹膜腔内积液者3例.结论:CT平扫对肠扭转的早期诊断及指导临床治疗有重要价值.     

急诊CT中肠系膜漩涡征的临床意义

目的探讨急性腹痛患者肠系膜漩涡征的临床意义。方法回顾性分析30例急性腹痛而全盆腹腔CT平扫病例。以肠系膜血管伴或不伴肠管绕轴旋转角度至少大于90°作为漩涡征的判断标准,分别观察漩涡征角度、位置、方向以及伴随征象,并比较肠扭转及非肠扭转病例组中漩涡征各项特征的差异性。结果①肠扭转组漩涡征角度为(494.00±123.58)°,非肠扭转组漩涡征角度为(160.91±63.16)°,两者存在统计学差异(t=5.30,P<0.05);②肠系膜漩涡征作为肠扭转诊断标准的准确度为35.48%,当漩涡征旋转角度大于和等于300°时,诊断肠扭转敏感性为83.35%,特异性为90%,准确度为71.43%;③小肠扭转漩涡征多位于中线或偏右侧中上腹部,乙状结肠扭转位于左下腹。而非肠扭转病例的漩涡征可出现在下腹部、腹腔边缘等不典型区域。结论肠系膜漩涡征大部分并不指向肠扭转,当漩涡征旋转角度越大越倾向于肠扭转,小肠扭转多位于中腹部或右上腹部,下腹部出现漩涡征需想到阑尾炎的可能。     

多层螺旋CT在成人肠套叠诊断中的应用

目的 探讨成人肠套叠的多层螺旋CT(MSCT)直接征象和轴位薄层结合多平面重组技术(MPR)对成人肠套叠及其原发病的诊断价值.方法 回顾性分析经手术和病理证实的21例成人肠套叠的MSCT直接征象,并比较应用轴位薄层结合MPR与单纯应用轴位厚层图像对成人肠套叠及其原发病诊断的准确性.结果 应用轴位厚层显示靶征6例,双肠管征5例,不典型征象如狗嘴征、"8"字征和香蕉征共6例,肿块征4例,血管卷入征10例;确诊肠套叠13例(13/21,61.9%)、原发病13例(13/21,61.9%).采用轴位薄层结合MPR显示靶征14例,双肠管征18例,肿块征3例,血管卷入征15例;确诊肠套叠19例(19/21,90.5%)、原发病15例(15/21,71.4%).轴位薄层结合MPR较轴位厚层对成人肠套叠的诊断准确性差异有统计学意义(P<0.05),但对其原发病的诊断准确性差异无统计学意义(P>0.05).结论 靶征、双肠管征和血管卷入征是成人肠套叠的特异性直接MSCT征象;轴位薄层结合MPR对成人肠套叠的诊断有重要价值,应常规实施.     

成人中肠未旋转的MSCT诊断价值

目的 探讨MSCT对成人中肠未旋转的诊断价值.方法 选取并分析明确诊断的16例成人中肠未旋转(其中3例合并中肠扭转)患者的CT图像及临床资料.结果 16例患者CT扫描均显示小肠(十二指肠水平段、空肠、回肠)聚集于右侧腹腔,盲肠及回盲部位于左侧腹腔,肠系膜血管"换位征"阳性,肠系膜血管"旋涡征"5例,其中3例合并中肠扭转...     

MSCTA在儿童肠旋转不良伴中肠扭转中的诊断价值

目的:探讨MSCT血管成像(MSCTA)在儿童肠旋转不良伴中肠扭转中的诊断价值.方法:回顾性分析经手术证实的11例肠旋转不良伴中肠扭转患儿的临床资料和CT表现,其中男8例,女3例,年龄13天～8岁,中位年龄2.3岁.11例患儿均行CT平扫及增强检查,并采用多平面重组(MPR)、最大密度投影(MIP)、容积再现(VR)技术对图像进行后处理.结果:10例患儿表现为"漩涡征",1例患儿表现为"换位征",6例患儿可见"鸟喙征",5例患儿表现为肠管扩张、积液,4例可见肠壁及肠系膜肿胀,4例可见腹盆腔积液.结论:MSCTA对诊断儿童肠旋转不良伴中肠扭转具有重要价值.     

肠旋转不良伴中肠扭转的CT诊断

目的 评价CT对肠旋转不良伴中肠扭转(volvulus in intestinal malrotation, VIM)的诊断价值.方法 对12例术前CT明确诊断并经手术证实的VIM患者的临床CT资料进行回顾性分析.结果肠系膜根部"漩涡征"12例,"鸟喙征"9例,"靶环征"3例,3例合并肠管淤张积液、肠系膜水肿及腹水.结论 VIM具有特异性CT征象,CT检查对诊断VIM具有重要价值.     

The role of interventional radiology in trauma

Introduction Interventional Radiology has evolved into a specialty having enormous input into the care of the traumatized patient.In all hospitals,regardless of size,the Interventional Radiologist must consider their relationships with the trauma service in order to     

Diagnóstico ecográfico del neumotórax

The ultrasonographic diagnosis of pneumothorax is based on the analysis of artifacts. It is possible to confirm or rule out pneumothorax by combining the following signs: lung sliding, the A and B lines, and the lung point. One fundamental advantage of lung ultrasonography is its easy access in any critical situation, especially in patients in the intensive care unit. For this reason, chest ultrasonography can be used as an alternative to plain-film X-rays and computed tomography in critical patients and in patients with normal plain films in whom pneumothorax is strongly suspected, as well as to evaluate the extent of the pneumothorax and monitor its evolution.     

Carbohydrate Supplementation during Exercise: Does It Help? How Much is Too Much?

KEY POINTS· Carbohydrate intake during exercise can delay the onset of fatigue and improve performance of prolonged exercise as well as exercise of shorter duration and greater intensity (e.g., continuous exercise lasting about 1h and intermittent high-intensity exercise), but the mechanisms by which performance is improved are different.     

The acutely limping child

Acute limping may be the result of multiple pathologies in children. The differential diagnosis varies based on the age of the child. Irrespective of age, the initial imaging work-up includes AP and frog leg radiographs of the pelvis and ultrasound; MRI may sometimes be helpful. In children less than 3 years, infections and trauma are most frequent. MRI is the imaging modality of choice when osteomyelitis is clinically suspected. Between the ages of 3 and 10 years, transient synovitis of the hip and Legg-Calvé-Perthes disease are main considerations but infection, inflammation and focal bony lesions are also considered. In children over 10 years, slipped capital femoral epiphysis also is considered.     

Do Balance Board Training Programs Reduce the Risk of Ankle Sprains in Athletes?

Introduction Ankle sprains are the most common musculo-skeletal injury that occurs in athletes,particularly in sports that require jumping and landing on one foot such as soccer,and basketball(1-4).These injuries often result in significant time loss from participation,long-term disability,and have a major impact on health care costs and resources(5-8).     

磁共振DWI和动态增强鉴别颅底脊索瘤和侵袭性垂体瘤的应用

目的 探讨磁共振扩散加权成像(DWI)和动态增强在颅底脊索瘤和侵袭性垂体瘤(IPA)鉴别诊断中的应用价值.方法 搜集经手术病理证实且影像学有鞍区破坏的颅底脊索瘤患者15例、向鼻咽部侵犯的IPA患者20例.测量二者的表观扩散系数(ADC)值,绘制受试者工作特征曲线(ROC),分析动态增强曲线的类型,统计达峰时间(TTP)、增强峰值(EP)和最大对比增强率(MCER),分析各个参数在鉴别诊断中的价值.结果 颅底脊索瘤的ADC值为(1.274±0.07)×10-3mm2/s,高于IPA ADC值(0.672±0.03) ×10-3 mm2/s(P ＜0.001),ADC阈值为0.964×10-3mm2/s时,ROC曲线下面积为0.997,敏感度为93.3％,特异度为100％.颅底脊索瘤时间-信号强度曲线(TIC)Ⅰ型14例,TICⅢ型1例,此例TICⅢ型者TTP约40 s;IPA TIC Ⅰ型7例,TICⅢ型13例.颅底脊索瘤和IPA的EP、MCER差异均有统计学意义(P ＜0.001).结论 ADC值和TIC的类型及其相关参数(EP,MCER)有助于颅底脊索瘤和IPA之间的鉴别.     

Treatment of intrahepatic arteriovenous fistula in hepatocellular carcinoma with N-butyl-2-cyanoacrylate

Primary hepatocellular carcinoma (HCC) continues to be one of the most common malignancies with an incidence of approximately one million cases per year and a dismal prognosis; some authors have reported a median survival of 1 ～ 2 months after diagnosis. Although surgery remains the only hope for cure, few patients are candidates[1,2].     

U50,488H对正常及缺氧心肌细胞L型钙电流的作用

目的 探讨心脏阿片受体和β-受体相互作用的机制。方法 采用全细胞膜片钳技术,观察U50,488H(β-阿片受体选择性激动剂)对正常和缺氧心肌细胞L型钙电流的作用。结果 U50,488H剂量依赖性(0．1～100μmol／L)抑制正常心肌细胞的L型钙电流及异丙肾上腺素(0．1μmol／L)激动的钙电流,而细胞缺氧后,这一抑制作用减弱;U50,488H对Forskolin(10μmol／L)激动的L型钙电流无明显影响。结论 β-阿片受体对β-受体信号的负性调节作用在细胞缺氧后减弱,其作用位点可能发生于β-受体与腺苷酸环化酶环节之间。