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.
  A correct diagnosis of periodontal disease or gingivitis requires the skills and training of a dental professional. The signs of gingivitis include red, swollen gums, â¦ bleeding gums when you brush your teeth. Periodontal disease may include sore teeth, loose teeth, or a chronic bad taste in your mouth.f your gums bleed when you brush or floss or your gums bleed easily when gently poked, you most likely have gum disease. It all depends on how advanced your case is, and there are 4 stages from what I have been told.