Authorities at home and abroad have certified the markers of inflammation in one airway.Comparison o
Contact UsThe subjects generally take a sitting position and rest quietly for 5 minutes
1、Deep exhalation
First, exhale deeply and exhale as much gas as possible from the lungs
2、Deep inspiration
Cover the mouth with a disposable filter and inhale deeply until the total lung volume is reached
3、Exhaling
4-10sAfter inhaling to the total lung volume, immediately exhale at a constant expiratory fow rate for 4-10s
4、Observations
After successful sampling, the FENO value will be displayed within 1 minute
No water, no food, no smoking, no vigorous exercise within 1 hour before testing, no foodcontaining nitrate within 2 hours, and no alcohol within 4 hours. Avoid air leakage,ventilation, suffocation, and nozzle water during testing.
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