临床上传统应用Courand心导管(普通心导管)行右心导管检查和造影。当某些先天性心脏病(简称先心病)并右室压力显著增高时,如重度肺动脉瓣狭窄或法乐氏三联征等,普通心导管就难以自右房插入右室内:或在造影时,由于快速注射造影剂的反作用力,导管尖端也极易被弹出右室。因而既费时,病人又不易耐受,往往遭致失败。 The clinical application of Courand cardiac catheter (common cardiac catheterization) right heart catheterization and angiography. When some congenital heart disease (referred to as congenital heart disease) and right ventricular pressure was significantly higher, such as severe pulmonary valve stenosis or tetralogy of Fallot, etc., the common cardiac catheter is difficult to insert the right room from the right atrium: or in the angiography, Due to the rapid contrast agent injection reaction, the catheter tip is also easily ejected from the right ventricle. It is therefore time-consuming and the patient is not easily tolerated and often fails.