THE MERCK MANUAL HOME HEALTH HANDBOOKmultimedia

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Photographs

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Lung and Airway Disorders

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Peak Flow Meter

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Peak Flow Meter

Topics Containing This Multimedia

  • Tests for Lung Disorders
  • Asthma
  • A handheld peak flow meter is used to measure the peak expiratory flow (the fastest rate at which air can be exhaled) in a patient with asthma. The patient should blow into the device as hard as possible.

    (Photograph from Medichrome/Michael Tamborrino.)

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