What is COPD?

How is COPD service connected?

10%	30%	60%	100%
Any one of these:
• FEV1: 71-80% predicted
• FEV1/FVC: 71-80%
• DLCO (SB): 66-80% predicted	Any one of these:
• FEV1: 56-70% predicted
• FEV1/FVC: 56 – 70%
• DLCO (SB): 56 – 65% predicted	Any one of these:
• FEV1: 40 – 55% predicted
• DLCO (SB): 40 – 55% predicted
• Max oxygen consumption of 15 – 20 ml/kg/min	Any one of these:
• FEV1: 0-40% predicted
• FEV1/FVC: 0 – 40%
• DLCO (SB): 0 – 40% predicted
• Max exercise capacity less than 15 ml/kg/min
• Cor pulmonale
• Right Ventricular hypertrophy
• Pulmonary hypertension
• Episodes of acute respiratory failure
• Requires outpatient oxygen therapy

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FEV1: measures how much air a veteran can force out of their lungs after a deep inhalation
FVC: how much air a veteran can force out of their lungs after a deep inhalation
FEV1/FVC ratio: a ratio which tells how much of the air your lungs expel is expelled in the first second.
DLCO (SB): this test measures the ability of your lungs to transfer oxygen to the blood. The measurement is done using carbon monoxide as the test gas, as it measures how much carbon monoxide is left when you exhale
Oxygen consumption/exercise capacity: This type of test determines how much oxygen your blood uses when exercising at maximum exercise capacity (the max amount of physical activity you can repeat and system). There are many different ways of testing maximum exercise capacity, but the result is a measurement of the volume of oxygen (ml) you use at your current body weight (kg) each minute (min): ml/kg/min.

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