The foramen ovale is a hole in the wall between the left and right atria of every human fetus. This hole allows blood to bypass the fetal lungs.The purpose of this guide is to provide you with basic information about filing a utility patent application with the USPTO. The ductus arteriosus is a hole that allows the blood to skip the circulation to the lungs. These Local Patent Rules provide a standard structure for patent cases that will permit greater predictability and planning for the court and the litigants. Coronary artery stenosis, which can be further subdivided into the following etiologies: Fixed coronary stenosis. Acute plaque change (rupture, hemorrhage). Patent foramen ovale. O Adjust scale and gain to maximally fill the vessel of interest without artifact. • Meaning of scores based on literature.