LOINC
Version 2.71

98130-8Diffusion capacity.carbon monoxide/PredictedActive

Part Description

LP72464-8   Diffusion capacity.carbon monoxide
Diffusing capacity (DLCO) is the carbon monoxide uptake from a single inspiration in a standard time (usually 10 sec). Since air consists of very minute or trace quantities of carbon monoxide (CO), 10 seconds is considered to be the standard time for inhalation, then rapidly blow it out (exhale). The exhaled gas is tested to determine how much of the tracer gas was absorbed during the breath. This will pick up diffusion impairments, for instance in pulmonary fibrosis. This must be corrected for anemia (because rapid CO diffusion is dependent on hemoglobin in RBC's; a low hemoglobin concentration, anemia, will reduce DLCO) and pulmonary hemorrhage (excess RBC's in the interstitium or alveoli can absorb CO and artificially increase the DLCO capacity). Atmospheric pressure and/or altitude will also affect measured DLCO, and so a correction factor is needed to adjust for standard pressure. Online calculators are available to correct for hemoglobin levels and altitude and/or pressure where the measurement was taken. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details. Source: Wikipedia, Wikipedia

Fully-Specified Name

Component
Diffusion capacity.carbon monoxide/predicted
Property
RelFldConduct
Time
Pt
System
Respiratory system
Scale
Qn
Method

Additional Names

Short Name
Diff cap.CO/Predicted

Basic Attributes

Class
PULM
Type
Clinical
First Released
Version 2.71
Last Updated
Version 2.71
Order vs. Observation
Both

Example Units

Unit Source
% Example UCUM Units

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