How do you calculate peak flow?

How do you calculate peak flow?

How to measure peak flow

1. Move the marker to the bottom of the numbered scale.
2. Stand up straight.
3. Take a deep breath.
4. Hold your breath while you place the mouthpiece in your mouth, between your teeth.
5. Blow out as hard and fast as you can in a single blow.
6. Write down the number you get.

What is the purpose of peak flow measurements?

A peak flow meter is a portable, inexpensive, hand-held device that measures your ability to push air out of your lungs. Air flow is measured by the amount of air that you can blow out in one “fast blast.” Peak flow meters come in two ranges to measure the air pushed out of your lungs.

How is predicted PEF calculated?

Peak expiratory flow [L/min] = (Body height [cm] x 5.3) – 433. Conclusions: In some situations, especially in emergency settings, the presented formula may prove useful in predicting peak expiratory flow knowing only a child’s body height.

How do you calculate peak expiratory flow rate?

III. Calculation: Estimated PEFR in Adult Females

1. PEFR = (((Height x3.72) +2.24) – (Age x 0.03)) x 60.
2. Where Height in meters or (inches x 0.0254)

What is normal peak flow range?

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 peak flow indicates COPD?

Jackson et al. conducted an analysis of the data from the third national health and nutrition survey (NHANES III) and defined a PEFR of <80% predicted as abnormal. Using this definition they found a sensitivity of 91% and specificity of 82% to detect COPD.

What is normal range for peak flow meter?

What is are the formulas for calculating predicted peak expiratory values for adult patients?

Using regression analysis, the predicted equations derived in L/min are: F: PEF = 168.551 – 1.776$*$age + 1.354$*$height; M: PEF = 69.259 – 2.290$*$age+ 2.888$*$height. These reference PEF values for Indian adults are 24% lower for males and 27% lower for females than the Caucasian population.

How do you read a peak flow reading?

What is peak flow measurement?

1. Green . This means “go.” The green zone is 80% to 100% of your highest peak flow reading, or personal best.
2. Yellow. This means “caution” or “slow down.” The yellow zone is 50% to 80% of your personal best.
3. Red. This means “stop.” The red zone is less than 50% of your personal best.

Is a peak flow of 300 good?

What is a good peak flow reading for COPD?