Peak flow meter
Peak Flow Meter
A Peak Flow Meter (pronounced: pek floh mee-tur) is a portable, inexpensive, hand-held device used to measure how well air moves out of your lungs.
Etymology
The term "Peak Flow Meter" is derived from its function. "Peak" refers to the maximum point, "Flow" refers to the movement of air, and "Meter" is a measuring device.
Function
A Peak Flow Meter is used to monitor the breathing, or respiratory function, in people with asthma. It measures the maximum speed of expiration, or Peak Expiratory Flow Rate (PEFR). This measurement is important in diagnosing and managing asthma, as it indicates how well the person's lungs are functioning.
Usage
To use a Peak Flow Meter, the person takes a deep breath in, then blows out as hard and fast as they can into the device. The meter then gives a reading of the speed of the air blown out. This reading can be compared to the person's personal best or expected PEFR to assess their lung function.
Related Terms
- Asthma: A condition in which a person's airways become inflamed, narrow and swell, and produce extra mucus, which makes it difficult to breathe.
- Peak Expiratory Flow Rate (PEFR): The maximum speed of expiration, measured using a peak flow meter.
- Respiratory function: The process of respiration, including inhalation and exhalation, by which oxygen is taken into the body and carbon dioxide is expelled from the body.
External links
- Medical encyclopedia article on Peak flow meter
- Wikipedia's article - Peak flow meter
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