Presented in part at the Association of Anaesthetists of Great Britain and Ireland Winter Scientific Meeting, London, January 2012.
Evaluation of point-of-care haemoglobin measuring devices: a comparison of Radical-7™ pulse co-oximetry, HemoCue® and laboratory haemoglobin measurements in obstetric patients*
Article first published online: 22 OCT 2012
Anaesthesia © 2012 The Association of Anaesthetists of Great Britain and Ireland
Volume 68, Issue 1, pages 40–45, January 2013
How to Cite
Skelton, V. A., Wijayasinghe, N., Sharafudeen, S., Sange, A., Parry, N. S. and Junghans, C. (2013), Evaluation of point-of-care haemoglobin measuring devices: a comparison of Radical-7™ pulse co-oximetry, HemoCue® and laboratory haemoglobin measurements in obstetric patients. Anaesthesia, 68: 40–45. doi: 10.1111/anae.12039
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- Issue published online: 11 DEC 2012
- Article first published online: 22 OCT 2012
- Accepted: 6 September 2012
Vol. 68, Issue 5, 547–548, Article first published online: 11 MAR 2013
We prospectively compared two point-of-care haemoglobin concentration measuring devices with laboratory measurements to determine their accuracy in women undergoing caesarean section delivery. The two devices were the Masimo Rainbow SET® Radical -7™ pulse co-oximeter and the HemoCue® HB 201+, which is a cuvette-type system that uses photometry. Co-oximeter readings and HemoCue measurements were taken before and after surgery, and compared with laboratory measurements of haemoglobin concentration taken at the same time. We analysed data from 137 patients using Bland–Altman plots. Limits of agreement for co-oximeter readings were −4.20 to 2.02 g.dl−1 and for HemoCue were −1.49 to 1.48 g.dl−1. The bias (mean difference) for the co-oximeter was −1.09 g.dl−1 (95% CI −1.28 to −0.91) and for the HemoCue was −0.001 g.dl−1 (95% CI −0.089 to 0.088). Overall, 110/274 (40%) co-oximeter readings were within 1 g.dl−1 of laboratory values compared with 247/274 (90%) HemoCue measurements (p < 0.001 for difference). The co-oximeter gave lower readings and was less accurate than the HemoCue system when compared with laboratory measurements.