This test involves measuring the partial pressure difference between inspired and expired<unk><unk> . It relies on the strong affinity and large absorption capacity of red blood cells for<unk><unk>  and thus demonstrates gas uptake by the capillaries that are less dependent on cardiac output. The measurement of<unk>  is affected by atmospheric pressure and/or altitude and correction factors can be calculated using the method recommended by the American Thoracic Society. Expected<unk>  is also affected by the amount of hemoglobin,<unk> yhemoglobin, age and sex. The correction for hemoglobin is based on the method of Cotes as recommended by the American Thoracic Society.
Diffusing capacity for carbon monoxide
Integrated pulmonary index
Vital capacity
Lung compliance
Functional residual capacity
Peak expiratory flow
Mandatory minute ventilation
Oxygenation index