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.
Teeth bleeding. Teeth bleeding: Introduction. Teeth bleeding: Abnormal bleeding due to pathology related to the teeth or any systemic abnormality. See detailed information below for a list of 5 causes of Teeth bleeding, Symptom Checker, including diseases and drug side effect causes. Â» Review Causes of Teeth bleeding: Causes | Symptom Checker Â».