Table 2

 Timing of desaturation: number of incidents by cause and phase of anaesthetic

InductionMaintenanceEmergenceTotal
COVER5916513237
A:
    Laryngospasm372146104
    Aspiration/regurgitation1920645
    Difficult intubation376144
B:
    Hypoventilation79521
    Bronchospasm5218
    Pulmonary oedema0325
C:
    Hypotension1607
    Bradycardia0213
    Myocardial ischaemia0101
D:
    Drugs710623
“A”:
    Anaphylaxis3609
    Embolism0707
    Pneumothorax0202
    Water intoxication0202
Desaturation2240466
Total19730285584
Percentage34%52%15%