peak flow meter what should normal reading be
This zone is from 80 to 100 percent of your child's personal best peak flow reading. This is the zone your child should be in every day. This is a signal that air moves well through his or her airways and that your child can do the usual activities and go to sleep without trouble. peak flow meter (PFM) is a device used to measure how well your child's asthma is under control. The device measures air flowing out of the lungs, called peak expiratory flow rate (PEFR), as a child forcefully blows into the device.