The patented dual colour sliders on the asmaPLAN+ define the management colour zones set by the healthcare professional for the asthmatic to follow. 100% is the asthmatic’s best.The yellow zone will typically be set to start at 80% of the asthmatic’s best reading.
The yellow zone will typically be set to start at 80% of the asthmatic's best while the red zone will typically start at 60%.
Variability of PEFR of greater than 20% should alert the asthmatic to a possible asthma attack.
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