Expired Air

The air that moves out of the chest during expiration. It contains a higher percentage of carbon dioxide and a lower percentage of oxygen compared to the inhaled air. (NCI Thesaurus)

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Expiratory Reserve Volume

The maximum volume of air a subject can exhale from the lungs after a tidal exhalation.

Expiration Date Production Identifier

The production identifier is the expiration date.

Expiration

To come to a close or end of useable period; termination.

Experimental Unit Subgroup Code

A coded value specifying the identification of uniform groups of subjects for separate analysis or treatment.

Experimental Unit Status Date

The date (and time) on which the status is assigned to the experimental unit.

Experimental Unit Status Code

A coded value specifying the phase in the lifecycle of the experimental unit.