Acute asthma in adults (> 12 years) and children (≥ 2 year)
Examination:
Moderate exacerbation (all of)
Speech normal, able to talk
RR < 25 (> 5-12 y: ≤ 30, 2-5 y: 40) bpm
P < 110 (> 5-12 y: ≤ 125, 2-5 y: ≤ 140) bpm
SpO2 ≥ 92%
PEFR > 50-75% best or predicted
Severe exacerbation (any one of)
Can’t complete sentences (2-12 y: too breathless to talk)
2-12 y: use of accessory neck muscles
RR ≥ 25 (> 5-12 y: > 30, 2-5 y: > 40) bpm
P ≥ 110 (> 5-12 y: > 125, 2-5 y: > 140 ) bpm
SpO2 ≥ 92 (2-12 y.: < 92)%
PEFR > 33-50% best or predicted
Life threatening exacerbation (any one of)
Exhaustion, altered consciousness
Arrhythmia or hypotension
Silent chest, cyanosis or poor respiratory effort
2-12 y: silent chest, poor respiratory effort, agitation, confusion, cyanosis
SpO2 < 92%
PEFR < 33% best or predicted
Near-fatal asthma
Raised PaCO2 +/- requiring mechanical ventilation
Management:
Moderate exacerbation
Admit:
If worsening symptoms despite initial bronchodilator treatment
Previous episode of near-fatal asthma
Oxygen:
If hypoxic via venturi mask
Aim for SpO2 94-98%
Bronchodilators:
Salbutamol:
> 12 y: via pMDI + spacer:
- 4 puffs initially + 2 puffs every 2 mins up to 10 puffs
- Repeat every 10-20 mins if required
2-12 y: via pMDI + spacer (if < 3 years + mask):
- 1 puff every 30-60 secs up to 10 puffs (each puff should be given one at a time and inhaled with five
tidal breaths)
- Repeat every 10-20 mins if required
Antibiotics:
Do NOT prescribe antibiotics unless symptoms and signs of infectionPrednisolone:
> 12 years: Prednisolone 40-50mg PO 5/7
> 1-12 years: Prednisolone usually 3 days sufficient but tailor course to the individual:
- > 5 years 30-40mg PO
- 2-5 years 20mg PO
- < 2 years 10mg PO
Acute severe:
Admit all children and adults
Oxygen
If hypoxic via venturi mask
Aim for SpO2 94-98%
Bronchodilators via (ideally O2 driven (flow rate 6 L/min)) nebuliser:
Salbutamol:
> 5 y:
5 mg, repeat salbutamol every 20-30mins if required
2-5 y:
2.5 mg, repeat salbutamol every 20-30 mins if required
Ipratropium bromide:
> 12 y:
500 mcg
2-12 y:
250 mcg
Do not repeat ipratropium within 4 hours
Antibiotics:
Do NOT prescribe antibiotics unless symptoms and signs of infection
Doses as above
(Notes on prednisolone:
If already on maintenance steroids, increase to 2 mg/kg for children and up to 60 mg for adultsDuration: 3 days for children and 5 days for adults is usually sufficient, but tailor to the individual Weaning is not needed if the course is less than 14 days longRepeat dose if the child vomits)
Review:
Within 2 working days
Assessment of asthma control (eg Asthma Control Test (ACT))?
Review of reliever use (eg Asthma slide rule)?
(Note: no consensus on how many SABA inhalers per year is too much, Primary Care Respiratory
Society suggests 3 per year)
Review of chronic management with a low threshold to titrate treatment +/refer?
Educated and supported self management?
If acute severe attacks follow-up in secondary care for 1 year?
If life threatening and near-fatal attack follow-up in secondary care indefinitely?
Resource(s):