呼吸困难“三凹征”是指
胸骨上窝、锁骨上窝、肋间隙吸气时明显下陷
胸骨上窝、锁骨上窝、肋间隙在呼气时明显下陷
胸骨上窝、锁骨上窝、剑突下窝在吸气时明显下陷
胸骨上窝、锁骨上窝、剑突下窝在呼气时明显下陷
胸骨上窝、锁骨下窝、纵隔在吸气时明显下陷