Nat Med:激光胶囊内镜或优于上消化道内镜

2013-01-23 EGMN Nat Med

  根据哈佛大学的一项研究,该校研究人员开发的一种小型、可吞服的激光影像胶囊不需活检即可提供上消化道全层影像,且比传统内镜检查更为快速,创伤更小[Nat. Med. 2013 Jan. 13 (doi: 10.1038/nm.3052)]。   这款与多维元素片大小相似的透明胶囊,在食管内运行过程中沿其外周产生快速旋转的近红外光束,根据

  根据哈佛大学的一项研究,该校研究人员开发的一种小型、可吞服的激光影像胶囊不需活检即可提供上消化道全层影像,且比传统内镜检查更为快速,创伤更小[Nat. Med. 2013 Jan. 13 (doi: 10.1038/nm.3052)]。

  这款与多维元素片大小相似的透明胶囊,在食管内运行过程中沿其外周产生快速旋转的近红外光束,根据反射光的变化,在数分钟内即可获取食管横断面影像。整合这些连续的横断面影像,便可形成整个食管腔的3维模型。

  

  

  

  哈佛大学医学院病理学教授、麻省总医院Wellman光医学中心副主任Guillermo Tearney博士指出,该系统提供了一种便捷的Barrett食管筛查方法,既不需要对患者实施镇静,也不需要对医生进行培训以及添置专门的设备。即便是与高分辨率内镜相比,食管内层3维显微结构影像所提供的信息也更为详细。

  该胶囊与一条导线相连,内有光纤和用于定位的激光传动轴。使用完毕后,可拉出胶囊,进行灭菌,以备再次使用。

  在初步试验中,研究者对7例健康者和6例Barrett食管患者长约15 cm的食管进行了影像学检查,平均58秒后即可获得影像。2次下行和2次上行检查用时约6分钟,而标准上消化道内镜检查则需要约90分钟时间。这一被称为系线胶囊内镜的技术,可清晰识别Barrett食管细胞异常。

  

 

   

  Tearney博士称:“我们最初担心由于胶囊较小而可能遗漏许多信息,但我们惊奇地发现,该胶囊一旦被吞服后,便被食管紧密包裹,从而可获得整个食管内壁的完整显微影像。”

  受试者无并发症发生。13例受试者中有12例声称,与以前的内镜检查相比,他们更愿意接受该胶囊检查。

  研究者指出,鉴于系线内镜胶囊在胃肠道内运行时不需要影像指引,因此对操作者的培训非常简单。事实上,由于操作简便,包括初级保健诊所在内的几乎任何医疗机构均可开展这一显微影像检查。

  该研究由美国国立卫生研究院资助,研究者声称无相关利益冲突。


Tethered capsule endomicroscopy enables less invasive imaging of gastrointestinal tract microstructure

Abstract

Here we introduce tethered capsule endomicroscopy, which involves swallowing an optomechanically engineered pill that captures cross-sectional microscopic images of the gut wall at 30 μm (lateral) × 7 μm (axial) resolution as it travels through the digestive tract. Results in human subjects show that this technique rapidly provides three-dimensional, microstructural images of the upper gastrointestinal tract in a simple and painless procedure, opening up new opportunities for screening for internal diseases.    

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    2013-10-13 liye789132251
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    2013-01-25 oliver169
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