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Comparative Study
. 1982 Sep-Oct;18(5):791-4.

The accuracy of the Hewlett-Packard 47201A ear oximeter below 50% saturation

J R Stradling
  • PMID: 6927531
Comparative Study

The accuracy of the Hewlett-Packard 47201A ear oximeter below 50% saturation

J R Stradling. Bull Eur Physiopathol Respir. 1982 Sep-Oct.

Abstract

The Hewlett-Packard 47201A ear oximeter has been shown to measure arterial oxygen saturation (SaO2) above 50% SaO2 with an accuracy of +/- 5%. Below 50% SaO2, the oximeter underestimates arterial saturation in a predictable way, thus allowing a correction factor to be used: true SaO2 = (oximeter reading + 50)/2.

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