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Lung diffusion testing

Lung diffusion testing

Overview

Lung diffusion testing measures how well oxygen passes from the air sacs in the lungs into the blood.

Review Date 10/14/2025

Updated by: Andrew Schriber, MD, FCCP, Specialist in Pulmonary, Critical Care, and Sleep Medicine, Virtua Memorial Hospital, Mount Holly, New Jersey. Review provided by VeriMed Healthcare Network. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.