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Table 1 Score of respiratory failure

From: New severity score of acute respiratory failure

Grade Respiratory rate Accessory muscle use Hypoxemia
I <30 Intercostal Normal
II 30 to 40 Supraclavicular and/or suprasternal Cyanosis
III >40 Thoraco-abdominal Circulatory and/or
   swing/nasal flaring consciousness disorders
IV Gasp Exhaustion/ventilatory arrest Cardio-circulatory arrest