What are the parameters for diagnosing a severe asthma attack are?

Submitted by: Murtaza
☛ Peak expiratory flow rate of between 30% and 50% of expected
☛ Respiratory rate greater than 25 breaths/minute
☛ Tachycardia: heart rate > 100 beats per minute
☛ Inability to complete sentences with one breath
Submitted by: Murtaza

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