ductus arteriosus


duc·tus ar·te·ri·o·sus

noun \ˈdək-təs-är-ˌtir-ē-ˈō-səs\

Definition of DUCTUS ARTERIOSUS

:  a short broad vessel in the fetus that connects the pulmonary artery with the aorta and conducts most of the blood directly from the right ventricle to the aorta bypassing the lungs

Origin of DUCTUS ARTERIOSUS

New Latin, literally, arterial duct
First Known Use: 1811

ductus ar·te·ri·o·sus

noun \-är-ˌtir-ē-ˈō-səs\   (Medical Dictionary)

Medical Definition of DUCTUS ARTERIOSUS

: a short broad vessel in the fetus that connects the pulmonary artery with the aorta and conducts most of the blood directly from the right ventricle to the aorta bypassing the lungs

ductus arteriosus

noun    (Concise Encyclopedia)

Channel between the pulmonary artery and the aorta in the fetus, which bypasses the lungs to distribute oxygen received through the placenta from the mother's blood. It normally closes once the baby is born and the lungs inflate, separating the pulmonary and systemic circulations. Closure before birth causes circulatory problems. If the ductus stays open after birth (patent ductus arteriosus, more common in premature births), oxygenated and deoxygenated blood mix. Alone, this may not be serious; in some heart malformations it is even necessary for life.

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