Document Detail

Accuracy of pulse oximetry in pigmented patients.
MedLine Citation:
PMID:  8914569     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Prospective assessment of the accuracy of three pulse oximeters and two probe sites in darkly pigmented critically ill patients under clinical conditions.
PATIENTS AND METHODS: One hundred consecutive, darkly pigmented critically ill adult patients with arterial lines in situ were studied. Patients were excluded if the haemoglobin concentration was less than 7 g/dl and carboxyhaemoglobin or methaemoglobin levels exceeded 2%. Pigmentation was objectively quantified with a portable EEL reflectance spectrophotometer (Evans Electroselenium Company, Diffusion Systems Limited, London). Reflectance was measured at nine wavelengths.
RESULTS: The degree of pigmentation as measured by percentage reflectance closely matched that of a control group of black Africans from a pigmentation study. The limits of agreement (2.6% to 5.8%), precision and bias values between pulse oximeter and co-oximeter readings fell within a narrow range. The 95% confidence intervals of the limits of agreement reflected a small variation in the difference between pulse oximeter and co-oximeter readings. These small differences were not clinically significant in the pigmented patients who were enrolled in the study.
CONCLUSION: The accuracy of pulse oximetry is not adversely affected by skin pigmentation, and it remains a useful oxygenation monitoring device in darkly pigmented patients.
P A Bothma; G M Joynt; J Lipman; H Hon; B Mathala; J Scribante; J Kromberg
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde     Volume:  86     ISSN:  0256-9574     ISO Abbreviation:  S. Afr. Med. J.     Publication Date:  1996 May 
Date Detail:
Created Date:  1997-02-19     Completed Date:  1997-02-19     Revised Date:  2014-09-12    
Medline Journal Info:
Nlm Unique ID:  0404520     Medline TA:  S Afr Med J     Country:  SOUTH AFRICA    
Other Details:
Languages:  eng     Pagination:  594-6     Citation Subset:  IM    
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MeSH Terms
Oximetry* / instrumentation,  methods,  standards
Oxygen / blood
Prospective Studies
Skin Pigmentation*
Reg. No./Substance:

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