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Continuous hemoglobin monitoring using pulse co-oximetry in cardiac surgery


DOI: http://dx.doi.org/10.18821/0201-7563-2016-61-5-329-334

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Abstract

The aim. To assess the accuracy of continuous hemoglobin monitoring using pulse co-oximetry and reveal factors affecting the results of the measurements during early postoperative period in cardiac surgery. Materials and methods. 27 patients undergoing off-pump CABG and 16 patients after elective complex (repair or replacement of two or more valves) or combined (valve and coronary artery) cardiac surgery requiring CPB were enrolled into a prospective observational study. Both groups received continuous hemoglobin monitoring using pulse co-oximetry (SpHb). During early postoperative period SpHb was compared with hemoglobin concentration in the arterial blood (Hbart). Results. We found positive correlation between SpHb and Hb in both groups (rho =0,29, p < 0,05 and rho=0,34; p<0.005 respectively). The Bland-Altman analysis showed a bias ± limits of agreement (±1.96 SD) between the continuously measured hemoglobin and reference arterial blood hemoglobin concentration of -6,0 ± 41,0 g/l in the off-pump group and 7,7 ± 31,0 g/l in the CPB group. Conclusions. Hemoglobin measurement using pulse co-oximetry does not provide acceptable accuracy during early postoperative period in cardiac surgery. Applicability of this technology is influenced by vascular tone, systemic and regional tissue hypoperfusion.


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For citation: Len’kin P.I., Smetkin А.А., Husseyn А., Fot Е.V., Len’kin А.I., Paromov K.V., Ushakov А.А. , Krygina М.А., Kirov М.Yu. Continuous hemoglobin monitoring using pulse co-oximetry in cardiac surgery. Anesteziologiya i reanimatologiya (Russian journal of Anаеsthesiology and Reanimatology) 2016; 61(5): 329-334. (In Russ.). DOI: http://dx.doi.org/10.18821/0201-7563-2016-61-5-329-334

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ISSN: 0201-7563 (Print)
ISSN: (Online)