COPD vs ARDS mnemonic

Obstructive-COPD or COPDstructive <80% FEV1/FVC
Restricive—ARDS or A-ReDStrictive >80% FEV1/FVC

O is before R in the alphabet, and Obstructive is <80%
Restrictive is > 80%

Check this COPD video>>>

ABC Mnemonic for Obstructive Lung Diseases (OLD):

A–>Asthma

B–>Bronchiectasis

C–>COPD