Evaluation of Biox IIA ear oximeter. Issue 11 (November 1985)

• Record Type: Journal Article
• Authors: Tweeddale, P M; Douglas, N J
• Is Part Of: Thorax. Volume 40:Issue 11(1985)
• Page Start: 825
• Page End: 827
• Publication Date: 1985-11
• Subjects: Chest -- Diseases -- Periodicals; Thorax; Chest -- Diseases; Periodicals; Periodicals; 617.54
• DOI: 10.1136/thx.40.11.825
• Languages: English
• ISSNs: 0040-6376

Abstract

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.