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肺血的增加与减少,有无青紫是临床上鉴别先天性心脏病的两个要点,利用这两个要点往往可排除一些先天性心脏病,例如从左向右分流的先天性心脏病肺血是增加的,而伴有肺动脉瓣(包括瓣上和瓣下)一类的先天性心脏病肺血是减少的,先天性主动脉瓣病变的先心病,肺血可不增加也可不减少,那么怎样来辨别肺血多与少呢?下面几点可供参考。①肺门是增大还是缩小,正常肺门范围是在胸骨左缘2～4前肋间,如果肺血增多,肺门可超过这一范围,呈肺门增大,反之,较正常为小者呈肺门缩小。②肺门角的大小:即右下肺动脉第一分支与右上肺静脉夹角,正常约在60～90度,如果肺血增多,右下第一分支可增粗变直,其
Pulmonary blood increase and decrease, with or without purple is clinical identification of congenital heart disease, two points, the use of these two points can often rule out some congenital heart disease, such as from left to right shunt congenital heart disease pulmonary blood Is increased, and associated with pulmonary valve (including the valve and the valve) of a class of congenital heart disease is reduced pulmonary blood flow, congenital aortic valve disease congenital heart disease, pulmonary blood may or may not reduce, then how To identify more and less lung blood? The following points for reference. ① Hilar is increasing or shrinking, the normal range of hilar is sternal left margin of 2 to 4 before the intercostal space, if increased pulmonary blood flow, hilar can exceed this range, was hilar enlargement, on the contrary, more normal than small Humble was hilar. The size of the hilar angle: the first branch of the right lower pulmonary artery and the angle of the right upper pulmonary vein, the normal about 60 to 90 degrees, if the lung blood increased, the lower right first branch thickening straightened, its