“切开术”用英语怎么说？

他们是那些最不适于作瓣膜切开术的患者.They are patients in whom the valvulotomy was least adequate.因此病人被送到手术室立即作胸廓切开术.The patient was therefore transferred to theatre for immediate thoracotomy.他们以小型颅骨切开术在硬膜外放置硬膜外电极.His group placed electro...