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超声心动图是一种应用广泛的非损伤性检查技术,但是在某些情况下(如患者过度肥胖或有肺气肿)经胸壁的检查途径则难以获得理想的图象。近年来发展的食管超声心动图,便能克服这一弊端。本文将重点介绍此技术的检查方法及临床应用。一、食管超声探头 M型超声探头:1976年Frazin将外面套着油囊的超声换能器安装在一根可曲杆的顶端,再用电缆与超声仪相连接,这种结构不能在体外控制探头和声束的方向。随着内窥镜技术的发展,将超声换能器绑在胃镜或支纤镜的顶端组成食管探头,
Echocardiography is a widely used technique for noninvasive examination, but in some cases (such as over-obesity or emphysema) there is difficulty in obtaining the ideal image through the chest wall. In recent years, the development of esophageal echocardiography, we can overcome this drawback. This article will focus on the examination of this technology and clinical applications. First, the esophageal ultrasound probe M-type ultrasound probe: Frazin in 1976 will be equipped with an outer capsule mounted ultrasound transducer can be a curved rod top, and then cable and ultrasound connected to this structure can not be controlled in vitro Probe and sound beam direction. With the development of endoscopic technology, the ultrasound transducer tied to the top of the gastroscope or fiberoptic mirror composed of esophageal probe,