Author: Glossary
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Oxyhematoporphyrin
A derivative of hematoporphyrin sometimes present in urine.
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Oxyhematin
An iron compound that constitutes the coloring matter in oxyhemoglobin. When oxidized, it yields hematinic acid; when reduced, hematoporphyrin.
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Transtracheal oxygen therapy
The delivery of oxygen via a small plastic cannula inserted directly into the trachea through a small surgical opening in the cricothyroid membrane of the neck.
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Oxygenic
Concerning, resembling, containing, or consisting of oxygen.
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Oxygen delivery system
An apparatus that provides a concentration of inhaled oxygen greater than that of room air. A fixed-performance oxygen delivery system provides a consistent oxygen concentration. A variable-performance oxygen delivery system provides an oxygen concentration that may vary with changes in the patient’s breathing pattern.
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Oxygen delivery
The amount of oxygen carried to the tissues, i.e., the cardiac output multiplied by the oxygen content of arterial blood.
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Total oxygen content of blood
The sum of the oxygen bound to hemoglobin plus the oxygen dissolved in the blood.
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Oxygen content
The amount of oxygen in volume percent that is present in the blood at any one moment.
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Oxygen concentrator
A device used for home oxygen therapy that removes most of the nitrogen from room air and delivers the oxygen at a low flow rate. A device utilized in oxygen therapy that segregates oxygen from the surrounding air and subsequently blends it to achieve a higher concentration. This enriched oxygen-air mixture is conveyed through a…
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Oxygen capacity
The maximum amount of oxygen expressed in volume percent (cc per 100 ml) that a given amount of blood will absorb. For normal blood it is about 20 cc.