What is a normal reading on a peak flow meter?
Peak expiratory flow (PEF) is measured in litres per minute. Normal adult peak flow scores range between around 400 and 700 litres per minute, although scores in older women can be lower and still be normal.
What does a peak flow reading of 400 mean?
The taller a person is the higher their peak flow. The highest peak flow reading for an individual occurs between the age of 30-40 years. A reading of 400- 600 l/min is considered normal. An individual suffering with asthma would have a lower reading of 200-400 l/min.
How do you read a peak flow reading?
Peak Flow Measurement
- Green . This means “go.” The green zone is 80% to 100% of your highest peak flow reading, or personal best.
- Yellow. This means “caution” or “slow down.” The yellow zone is 50% to 80% of your personal best.
- Red. This means “stop.” The red zone is less than 50% of your personal best.
How often should you use a peak flow meter?
Measure your peak flow at least once a day, usually in the morning before you take your asthma medicines. You might have to check it more often if you are having more episodes than usual, or if your reading is below 80 percent of your personal best.
What peak flow reading indicates asthma?
Yellow zone = caution Your peak flow rate is 50% to 80% of your personal best, an indication that your asthma is getting worse.
What is normal peak flow measurement?
A normal peak flow will vary according to height, age and gender. Adults should achieve readings of 400 to 700 litres per minute, with men generally higher. Readings tend to be lower in the morning and will be affected by how recently the person has taken his or her inhaler to expand the airways.
How do you use peak flow meter?
A peak flow meter is simple to use for tracking your asthma. Here’s what you do: Stand up or sit up straight. Make sure the indicator is at the bottom of the meter (zero). Take a deep breath in, filling the lungs completely. Place the mouthpiece in your mouth; lightly bite with your teeth and close your lips on it.
What is the unit of measurement for peak flow?
Specifically, the unit of the peak flow meter scale is liters per minute. Each reading is compared with the initial or baseline reading, which is taken when you are breathing without any symptoms. Normal readings of peak flow meters depend on a person’s age, sex, and height.
What is the average peak flow meter?
Normal readings of peak flow meters depend on a person’s age, sex, and height. For example, a 30 year old male that is 5’10” tall should have a reading close to 622 liters per minute. Check the charts below for normal peak flow values (click on images to enlarge). Normal readings of peak flow meters are within 80-100% of the baseline reading.