Table 1

Cardiorespiratory stability scoring system

Score	Designation	Criteria
0	Improved from baseline	Decreased oxygen requirement (>20% relative change in FiO₂)
1	No change from baseline
2	Mild instability	Increased oxygen requirement (20–50% relative change in FiO₂), more apnoeas and/or bradycardias responding to gentle stimulation (100% increase or 5 if none before)
3	Marked instability	Increased oxygen requirement (>50% relative change in FiO₂), more apnoeas and/or bradycardias responding to vigorous stimulation (100% increase or 5 times/episodes if they haven't had this problem before), higher ventilation requirement
4	Life threatening event	Requiring emergency resuscitation (eg, intubation, suction/bag mask oxygen, cardiac massage)