Using a written asthma action plan can help you and your child remember what to do when peak flow measurements reach a certain level.

CNN: Childhood asthma

Depending on his or her age, your child may use a hand-held device to measure how well he or she can breathe (peak flow meter).

CNN: Childhood asthma

In a few minutes Lorelei brought out the peak flow meter, and when Davis blew into it he was back nearly to his normal reading of 380.

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The action plan may use peak flow measurements and symptoms to categorize your child's asthma into zones, such as the green zone, yellow zone and red zone.

CNN: Childhood asthma

The whole system could cope with a flow of 200, 000 barrels a day more than three times the 63, 000 barrels a day the government estimates was the Macondo well's peak flow rate.

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But soon after, I developed a novel mathematical model which can be used by doctors and environmental specialists to quantify the effect of the pollutants on the lung function as measured by the peak expiratory flow rate-- which is essentially how much a person can breathe out in one breath.

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The increase brings the average flow names up to a fresh peak since the beginning of July 2007.

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The thought ten years ago was that they would mostly be charged at night, filling in the valley of low off-peak demand, and thus allowing more kilowatt-hours to flow across the same infrastructure.

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