Of the four infants in whom exposure to hypoxia
was discontinued early, one infant had a sibling who
had died of the sudden infant death syndrome and was
already being monitored at home. Oxygen saturation
levels in all four infants remained within the normal
range during subsequent monitoring. We believed that
monitoring the infants for a longer period in hospital
would not have been ethically appropriate because
they might be exposed to additional risks (for example,
the risk of acquiring an infection in hospital). The two
infants who had died following an aircraft flight were
not monitored so we are unaware of the duration and
degree of hypoxaemia to which they might have been
exposed