what is DLCO test
DLCO. A clinical test which provides an objective measure of lung function. It reflects the lung's ability to take up an inhaled nonreactive test gasâe.g., carbon monoxide (CO)âwhich binds to haemoglobin with such a high affinity that virtually all of the CO reaches the alveolar space. clinical test which provides an objective measure of lung function. It reflects the lung's ability to take up an inhaled nonreactive test gasâe.g., carbon monoxide (CO)âwhich binds to haemoglobin with such a high affinity that virtually all of the CO reaches the alveolar space.