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The effect of varying LED intensity on pulse oximeter accuracy.

Abstract:

Most pulse oximeters automatically alter the intensity of their light-emitting diodes (LEDs) according to the absorption of the finger, toe or earlobe to which they are attached. This paper investigates the effect of changing LED intensity on pulse oximeter accuracy. Our results show that the peak wavelength of a red LED typically increases by 8 nm as its intensity is increased ten-fold. To determine whether this shift introduces a significant error, a simple theoretical model based on the Be...

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Publisher copy:
10.3109/03091909109016208

Authors


de Kock, JP More by this author
Reynolds, KJ More by this author
More by this author
Institution:
University of Oxford
Department:
Oxford, MPLS, Engineering Science, Biomedical Research Centre
Journal:
Journal of medical engineering and technology
Volume:
15
Issue:
3
Pages:
111-115
Publication date:
1991
DOI:
EISSN:
1464-522X
ISSN:
0309-1902
URN:
uuid:c02de867-dbeb-45b6-924d-6b2735acaf10
Source identifiers:
61541
Local pid:
pubs:61541

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