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冠状动脉内的超声波检查法有两种,一种是血管内的超声波;另一种是导管型超声多普勒。血管内超声主要用来观察血管横切面的形态及组织学性质;导管型超声多普勒则主要用来测定血管内的血流速度。本文主要介绍前者。超声波发生器,根据其发生原理可以分为三种,即旋转反射镜型、旋转振动子型及电子扫描等三型。血管内超声导管一般为4.3～5.5F,引导导管为8F(1.D0.082″),引导钢丝为0.014″超声频率为20～30MHz,旋转速度(反射镜型及振动子型)为840～1500rpm。血管内超声波的主要用途有①由于可以
There are two types of intracoronary sonography: one is intravascular ultrasound; the other is catheter-based Doppler. Intravascular ultrasound is mainly used to observe the morphology and histological properties of vascular cross-section; catheter-based ultrasound Doppler is mainly used to determine blood flow velocity within the blood vessel. This article mainly introduces the former. Ultrasonic generator, according to the principle of its occurrence can be divided into three types, namely, rotating mirror type, rotating vibration sub-type and electronic scanning and other three types. Intravascular ultrasound catheter is generally 4.3 ~ 5.5F, the guide catheter is 8F (1.D0.082 “), the guide wire is 0.014” The ultrasonic frequency is 20 ~ 30MHz, the rotation speed (mirror type and vibrator type) 1500rpm. The main purpose of intravascular ultrasound ① as can