1 MCQs in Medicine for NEET PG
A 58-year-old woman with iron-deficiency anemia (hemoglobin 8.5 g/dL, MCV 68 fL) from chronic menorrhagia presents with mild exertional dyspnea. Spirometry and lung volumes are normal. Single-breath DLCO is measured at 14.2 mL/min/mmHg (68% predicted), which initially appears abnormal. However, when the hemoglobin-corrected DLCO is calculated using the ATS/ERS 2017 formula, the result shown as **C** in the diagram is obtained. Which of the following best explains why the structure marked **C** normalizes despite the initial measured DLCO being reduced?
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