The data produced by the<unk>  is an approximation of the distribution of ratios across the entire lung. It has been estimated that nearly 100,000<unk>  exchange units exist in the human lung; this could lead to a theoretical maximum of VA/Q compartments as high as 100,000, in that case.
Multiple inert gas elimination technique
Carbon monoxide detector
Gaseous detection device
Lung float test
Post bronchodilator test
Structured light plethysmography
Hyperoxia test
Whole-body counting