How are diffusing capacity of lung for carbon monoxide (DLCO) results expressed?

Updated: May 14, 2020
  • Author: Kevin McCarthy, RPFT; Chief Editor: Nader Kamangar, MD, FACP, FCCP, FCCM  more...
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The 2017 ATS recommendations for a standardized pulmonary function report details recommendations for reporting of DLCO. [8] A major change is the recommendation to express the measured DLCO on a z-score scale, which expresses the result as the number of multiples of a standard deviation above or below a population mean.

When hemoglobin is measured and available, it should be shown on the report with a note indicating whether the measured or predicted value has been adjusted for this.

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