Abstract
Arterial blood gas tensions, pH, and carboxyhaemoglobin were measured on 322 occasions in 165 patients and the actual oxygen saturation of the haemoglobin (Sao2) was compared with the ear oxygen saturation (SEO2) recorded during the arterial sampling with a Biox IIA ear oximeter. The overall agreement between SEO2 and Sao2 was good, with a mean difference in saturation (SEO2-Sao2) of + 1.5% (SD 3.0). The difference in saturation remained similar at all levels of arterial saturation observed and was unaffected by carboxyhaemoglobin concentration. On four occasions (1% of readings), however, SEO2 and Sao2 differed by more than 10% and such occasional errors might be misleading in clinical practice.
Full text
PDF
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Chapman K. R., D'Urzo A., Rebuck A. S. The accuracy and response characteristics of a simplified ear oximeter. Chest. 1983 Jun;83(6):860–864. doi: 10.1378/chest.83.6.860. [DOI] [PubMed] [Google Scholar]
- Collier C. R. Oxygen affinity of human blood in presence of carbon monoxide. J Appl Physiol. 1976 Mar;40(3):487–490. doi: 10.1152/jappl.1976.40.3.487. [DOI] [PubMed] [Google Scholar]
- Douglas N. J., Brash H. M., Wraith P. K., Calverley P. M., Leggett R. J., McElderry L., Flenley D. C. Accuracy sensitivity to carboxyhemoglobin, and speed of response of the Hewlett-Packard 47201A ear oximeter. Am Rev Respir Dis. 1979 Feb;119(2):311–313. doi: 10.1164/arrd.1979.119.2.311. [DOI] [PubMed] [Google Scholar]
- Tal A., Pasterkamp H., Leahy F. Arterial oxygen desaturation following salbutamol inhalation in acute asthma. Chest. 1984 Dec;86(6):868–869. doi: 10.1378/chest.86.6.868. [DOI] [PubMed] [Google Scholar]