The ductus arteriosus is a hole that allows the blood to skip the circulation to the lungs. However, when the baby is born, the blood must receive oxygen in the lungs and this hole is supposed to close. If the ductus arteriosus is still open (or patent) the blood may skip this necessary step of circulation. The open hole is called the patent ductus arteriosus.
Caring for a Bleeding Tooth. Some people mistakenly think that while brushing, a bleeding tooth is perfectly normal. It is not. Anytime there is any bleeding in the mouth, it is almost always a sign of periodontal disease. Even if you brush fairly hard, it should not cause healthy teeth and gums to bleed.
Identify the cause of bleeding gums. Bleeding is a sign of unhealthy gums and may be caused by a gum disease or other medical conditions. It is important you understand the cause of bleeding in order to take the appropriate steps to prevent it.Bleeding gums could be caused by: 1  Poor oral hygiene. This helps to slow the blood flow to the area, resulting in less blood loss. 2  Make a cold compress by wrapping an ice cube in a clean piece of paper towel. 3  Hold it against the bleeding gum, applying gentle pressure.