PEFR & BMI

• What is PEFR & what does it measure?

  Peak expiratory flow rate - this is sued to measure how well a patient's asthma is controlled.
• How do you use a PEFR metre?

  • Stand/sit upright
  • Set to 0
  • Hold metre parallel to floor & create a seal around the mouthpiece with lips
  • Take deepest breath possible
  • Exhale forcefully & quickly
  • Repeat 2x
• What units is peak flow measured in?

  Liters per minute
• What is the normal range for peak flow values?

  400-700 L/min
• What is BMI & what does it measure?

  Body mass index - measuring weight & height.
• What units does BMI use?

  Height - m

  Weight - kg
• How do you calculate BMI?

  Weight divided by height(squared).
• What is a healthy BMI range?

  18.5-24.9