Individualised pulse oximetry limits in neonatal intensive care
R Gupta, C W Yoxall, N Subhedar, N J Shaw
Neonatal Intensive
Care Unit Liverpool Women's Hospital
Liverpool L8 7SS
Correspondence to: Dr N J Shaw.
Accepted 14 June 1999
AIM
To determine
whether individualised limits for arterial oxyhaemaglobin saturation by
pulse oximetry (SpO2) are more effective for detecting
hypoxia and hyperoxia in sick newborn infants than setting fixed limits.
METHODSSix hundred
and ninety two simultaneous measurements of SpO2 and
partial pressure of oxygen in arterial blood (PaO2) were made in 95 infants. The sensitivity and specificity for predicting hypoxia and hyperoxia using various fixed SpO2 limits and
also individualised SpO2 limits, calculated using a
standard equation, were determined and compared.
RESULTSNone of the
fixed limits for SpO2 was both sensitive and specific for
predicting hypoxia and/or hyperoxia. There was no difference between
these and individualised limits.
CONCLUSIONIndividualised
SpO2 limits are no more effective than fixed
SpO2 limits for predicting hypoxia and/or hyperoxia in sick
newborn infants. SpO2 monitoring is not an ideal method for
assessing PaO2.
Keywords: pulse oximetry; intensive care; hypoxia; hyperoxia
© 1999 by Archives of Disease in Childhood
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