The patient records the reading twice a day, morning and night for a week at home and then calculates the difference between the highest reading and less reading if the difference is 15% or more, this proves the diagnosis.
Example:
1 - The highest reading in the evening.
1 - the most reading decline in the morning (350).
2 - The percentage = 500 - 350/500 = 150/500 = about 30%.
3 - As long as reading more than (15%) this proves the diagnosis of asthma.
Example:
1 - The highest reading in the evening.
1 - the most reading decline in the morning (350).
2 - The percentage = 500 - 350/500 = 150/500 = about 30%.
3 - As long as reading more than (15%) this proves the diagnosis of asthma.