Patent foramen ovale 2 mm affects the police. According to the relevant public information, patent foramen ovale can't be admitted to the police academy, which has certain security risks, and the police academy has training and assessment every week, which will affect the health. The foramen ovale can be divided into two types according to different anatomical positions and should be distinguished. One is the foramen ovale of the skull base, which is located on both sides of the sella turcica, with a round hole in front and a spinous hole in the back, and the other is the foramen ovale of the heart, which refers to the small holes on the left and right atrial septa.