Glossary

0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Obstruction
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Constriction or blockage of a body passage

Occluder
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Catheter-delivered foldable double-umbrella-type device that is unfolded into an open ductus Botalli to close it

Occlusion
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Closure

Oedema
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Increase of interstitial fluid in any organ, making that part of the body swell

Open heart surgery
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As opposed to closed heart surgery the surgeon can actually see the heart while operating; blood circulation through the heart is interrupted

Ostium
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Orifice, entrance, opening

Ostium-primum, otium secundum defekt
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Atrial septum defect (ASD I, ASD II)

Oval foramen
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Opening in the atrial septum of the foetal heart, which usually closes spontaneously after birth

Oxygenator
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Part of the heart-lung machine that takes over the respiratory function of the lung (oxygen saturation)

Oxygen saturation
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Proportion of oxygen bound to haemoglobin in the blood, expressed as a percentage of the maximal binding capacity. Can be measured using a pulse oximator

Author(s): Kinderherzstiftung, Prof. Dr. Elisabeth Sticker, Hermine Nock
Last updated: 2009-04-28