1) Lung 1) Medical equipment 
An oxygenator is a medical device that is capable of exchanging oxygen and carbon dioxide in the blood of human patient during surgical procedures that may necessitate the interruption or cessation of blood flow in the body, a critical organ or great blood vessel. These organs can be the heart, lungs or liver, while the great vessels can be the ao...
• (n.) An oxidizer.
(from the article `artificial heart`) ...blood circulation and oxygenation during heart surgery by diverting blood from the venous system, directing it through tubing into an artificial ... ...returning to the heart from the upper and lower portions of the body enters these tubes and by gravity drainage flows into a collecting reservoir...
(ok´sĭ-jә-na″tәr) an apparatus by which oxygen is introduced into the blood during circulation outside the body, as during open-heart surgery. See also heart-lung machine.
Ox'y·gen·a`tor noun An oxidizer. 
oxygenator A device for mechanically oxygenating anything; but especially, blood. When used to oxygenate blood, it is usually used during thoracic surgery or open-heart surgery.