Wash your hands
Assemble the spirometer as instructed
Sit upright
Stand if instructed by your healthcare provider
Slide the indicator to the zero or starting point
Hold the spirometer upright
Exhale normally
Place your lips tightly around the mouthpiece
Inhale slowly and deeply through the mouthpiece
Keep the indicator or piston rising steadily
Continue inhaling until you cannot inhale any more
Remove the mouthpiece
Hold your breath for 3 to 5 seconds
Exhale normally
Rest for a few seconds
Repeat the process as directed
Record your best result if needed
Clean the mouthpiece after use
Follow any specific instructions from your healthcare provider