Cardiorespiratory stability scoring
| Score | Designation | Criteria |
|---|---|---|
| 0 | Improved from baseline | Decreased oxygen requirement (>20% relative change in Fio 2) |
| 1 | No change from baseline | |
| 2 | Mild instability | Increased oxygen requirement (20–50% relative change in Fio 2), 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 Fio 2), more apnoeas and/or bradycardias responding to vigorous stimulation (100% increase or 5 if none before), higher ventilation requirement |
| 4 | Life threatening event | Requiring emergency resuscitation (for example, intubation, suction/bag and mask oxygen, cardiac massage) |
Fio 2 = fractional inspired oxygen concentration.