Lung Function Tests

Scooped expiratory limb in obstruction; flattening indicates large airway obstruction

A memory aid for interpreting the shape of the flow-volume loop.

A marker of eosinophilic airway inflammation

A memory aid for the use of FeNO in diagnosing asthma.

Four volumes combining into four capacities

A memory aid for the lung volumes and which cannot be measured by spirometry.

Effort dependent, compared with predicted or personal best

A memory aid for using and interpreting peak flow.

Obstructive lowers the ratio; restrictive lowers both values proportionately

A memory aid for distinguishing obstructive from restrictive spirometry.

TLCO measures diffusion; KCO corrects it for the volume available

A memory aid for interpreting the gas transfer factor.