随后对PBAV方法学上进行较多的研究，包括单球囊与双球囊扩张术及采用长的球囊进行扩张术，以后把球囊瓣膜成形术应用到新生儿病例，甚至进行胎儿主动脉瓣球囊成形术。
O O O B-pro I-pro I-pro I-pro O O O O O O O O O O O O O O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O O O O B-dis I-dis I-dis I-dis I-dis I-dis I-dis O O O O O O O O O O O O O B-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis I-dis O