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Severity classification of BCIS.
| Grade 1 | Grade 2 | Grade 3 |
|---|---|---|
| Mild hypoxia (SpO2 < 94%) or systemic hypotension with decrease in SBP > 20% | Severe hypoxia (SpO2 < 88%) or systemic hypotension with a decrease in SBP > 40% or unexpected loss of consciousness | Cardiovascular collapse necessitating CPR |
Abbreviations: SpO2—oxygen saturation; SBP—systolic blood pressure; CPR—cardiopulmonary resuscitation.
