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Table 1 Definition of postextubation acute respiratory failure

From: Physiological impact of high-flow nasal cannula therapy on postextubation acute respiratory failure after pediatric cardiac surgery: a prospective observational study

Tachypnea RR >50 breaths per minute (<1 year old)
RR >40 breaths per minute (1–4 year old)
Hypoxemia SaO2 <92% (total repair)
SaO2 <75% (palliative operation)
Hypercapnia PaCO2 >50 mmHg
Increased work of breathing Using accessory respiratory muscle
  1. Postextubation acute respiratory failure is defined by at least one of the criteria
  2. RR respiratory rate, PaCO 2 partial pressure of arterial carbon dioxide