What is the gas normally used to measure the diffusing capacity of the lung?

Question

Quizplus · Accepted Answer

The gas normally used to measure the diffusing capacity of the lung is Carbon Monoxide (CO). This is because CO is readily taken up by the hemoglobin in the blood, allowing for efficient transfer and diffusion across the alveolar-capillary membrane. Options A and C are incorrect as they are not actual gases used in this test, while option D (Helium) can be used for lung function tests but not for the measurement of diffusing capacity.

What Is the Gas Normally Used to Measure the Diffusing