pefr การใช้

• Measuring PEFR at work is a highly reliable test for occupational asthma.
• The result of the test is called peak expiratory flow rate ( PEFR ).
• As asthma symptoms increase, PEFR generally decreases.
• And eight out of 14 had at least a 20 percent decrease in PEFR premenstrually.
• PEFR can also be measured at work to see if there is a difference from the PEFR in a controlled environment.
• PEFR can also be measured at work to see if there is a difference from the PEFR in a controlled environment.
• In this case, the individual s peak expiratory flow rate ( PEFR ) is measured, showing how fast a person can exhale.
• Measurement of PEFR requires training to correctly use a meter and the normal expected value depends on the patient's sex, age, and height.
• In a mild exacerbation the peak expiratory flow rate ( PEFR ) is e " 200 L / min or e " 50 % of the predicted best.
• There are two subtypes divided by symptoms : Type 1 and Type 2, depending on the stability of the patient's maximum speed of expiration, or peak expiratory flow rate ( PEFR ).
• Type 1 is characterized by sustained, chronic variability of PEFR, while type 2 is distinguished by sudden unpredictable drops in PEFR where asthma symptoms are otherwise well controlled and the function of the lungs is not substantially impaired.
• Type 1 is characterized by sustained, chronic variability of PEFR, while type 2 is distinguished by sudden unpredictable drops in PEFR where asthma symptoms are otherwise well controlled and the function of the lungs is not substantially impaired.