How to Use a Peak Flow Meter enter my diary username password registered users of healthatoz, use your username and password to log in. While they come in various styles, manufactured by different companies, they essentially have a mouthpiece at one end, a valve for the air to escape at the other end, and a calibrated section in the middle.
Different styles vary as to readability.
Check with your asthma specialist to see which style would work best for you. Asthma specialists usually recommend them for patients with moderate or severe asthma, with mild but daily symptoms, or with nighttime asthma. They are also very helpful for someone who is newly diagnosed, or for those who have difficulty sensing the onset of symptoms. PFMs are usually used in the morning, upon awakening and in the evening. This allows the person to see the nighttime effect of asthma, even if they are asymptomatic.