Malmanu You are wrong hope your not a physician who is so misinformed! · Wheeze of course has nothing to do with lung capacity.
· Adventitious sounds from the lung can be divided into 3 types, continuous (wheezes), discontinuous (crackles) and rubs. Wheezes are caused by a reed like effect when airflow passes between a an abnormally obstructed airway. In the setting of asthma this is due to inflammation
· When they are loud enough they can be heard by the patient, but often they can’t; but everyone that is having an “asthma event’ will produce wheezes , although the loudness and location will depend on the expiratory flow rate which the patient can or does provide. Occasionally, a very sick asthmatic patient will not be able to produce a wheeze, but that is because they are near death and can’t generate a sufficient expiratory flow through severely blocked airways. These patient don’t needs a device to tell them that they are in trouble
· The peak flow meter can be used to monitor asthma, but it is less sensitive than the iSonea technology and is effort dependent, which is a problem in children and even some adults. The Wheeze rate has been shown to correlate better with symptoms than peak flow. I have no idea what other devices you are talking about, although the link is to one not approved and not likely to be available in the home.
Hope this makes you more informed
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