First peak flow reading much higher than second or third
I have been diagnosed with asthma within the past year. I was instructed to measure my peak flow three times, and record the best of the three readings. I have found that, at times, my first peak flow reading will be much higher than the second two. For example a first reading may be 650 and then the second 450-500. Is theis indicative of anything? Thank you
There are several possibilities. It is possible that you are unconsciously performing the first exhalation with greater effort than the subsequent ones, possible that your best effort results in minimal, transient airway obstruction or finally, that you are using improper technique with the first “blow” in a manner that falsely elevates the outcome. More likely than the preceding explanations is that the difference between 650 and 500 is not statistically significant, each value reflecting very good air flow.
Arrange to perform the peak flow measurements in the presence of your doctor or his/her nurse to watch so they can assess your technique.
Good luck. May your peak flows forever stay in this range.
Copyright 1994-2016 MedHelp International. All rights reserved.
MedHelp is a division of Aptus Health.
This site complies with the HONcode standard for trustworthy health information.
The Content on this Site is presented in a summary fashion, and is intended to be used for educational and entertainment purposes only. It is not intended to be and should not be interpreted as medical advice or a diagnosis of any health or fitness problem, condition or disease; or a recommendation for a specific test, doctor, care provider, procedure, treatment plan, product, or course of action. Med Help International, Inc. is not a medical or healthcare provider and your use of this Site does not create a doctor / patient relationship. We disclaim all responsibility for the professional qualifications and licensing of, and services provided by, any physician or other health providers posting on or otherwise referred to on this Site and/or any Third Party Site. Never disregard the medical advice of your physician or health professional, or delay in seeking such advice, because of something you read on this Site. We offer this Site AS IS and without any warranties. By using this Site you agree to the following Terms and Conditions. If you think you may have a medical emergency, call your physician or 911 immediately.