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Evaluation of the Ohmeda 3700 pulse oximeter: steady-state and transient response characteristics.

Authors :
Kagle DM
Alexander CM
Berko RS
Giuffre M
Gross JB
Source :
Anesthesiology [Anesthesiology] 1987 Mar; Vol. 66 (3), pp. 376-80.
Publication Year :
1987

Abstract

The authors determined the accuracy of the Ohmeda 3700 (version J) pulse oximeter in healthy volunteers rendered hypoxic (SaO2 from 60-98%) by breathing mixtures of O2 in N2. When equipped with an ear probe, the pulse oximeter reading (y) reliably predicted arterial saturation (x) under steady-state conditions (y = 1.05x - 4.66, r = 0.98) as well as when oxygen saturation was rapidly decreasing (y = 1.05x - 6.38, r = 0.96). Conversely, when equipped with a finger probe, the oximeter tended to significantly underestimate steady-state arterial saturation (y = 1.21x - 19.1, r = 0.98, P less than 0.001). In response to this information, the manufacturer modified the oximeter's software (version XJ1), resulting in improved agreement between oximeter readings and arterial values (y = 0.96x + 4.59, r = 0.99). Despite the close correlation between steady-state oximeter readings and arterial saturation, the 99% prediction limits for both the ear and finger probes (version XJ1) were +/- 8%. Finger probe readings did not reliably reflect radial arterial oxygenation during rapid desaturation (y = 0.55x + 45.2, r = 0.78). This may be related to the time required to "arterialize" the blood in the finger; during acute resaturation, we found that the ear- to finger-probe delay was 24.0 +/- 2.3 s (means +/- SE, P less than 0.001).

Details

Language :
English
ISSN :
0003-3022
Volume :
66
Issue :
3
Database :
MEDLINE
Journal :
Anesthesiology
Publication Type :
Academic Journal
Accession number :
3826695
Full Text :
https://doi.org/10.1097/00000542-198703000-00018