Features compatible with severe acute asthma are
A
Pulse rate >120/minute
B
Peak expiratory flow rate < 200 L/min
C
Respiratory rate >25 breaths/min
D
Pulsus paradoxus
E
Arterial PaCO2> 5 kPa on room air
Correct Answer: Pulse rate >120/minute, Peak expiratory flow rate < 200 L/min, Respiratory rate >25 breaths/min