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Comparison of the peripheral blood eosinophil count using near-patient testing and standard automated laboratory measurement in healthy, asthmatic and COPD subjects

Authors Hambleton K, Connolly CM, Borg C, Davies JH, Jeffers HP, Russell REK, Bafadhel M

Received 25 July 2017

Accepted for publication 16 August 2017

Published 26 September 2017 Volume 2017:12 Pages 2771—2775

DOI https://doi.org/10.2147/COPD.S147216

Checked for plagiarism Yes

Review by Single-blind

Peer reviewers approved by Dr Charles Downs

Peer reviewer comments 2

Editor who approved publication: Professor Dennis Doherty

Kirsty Hambleton, Clare M Connolly, Catherine Borg, Joanne H Davies, Helen P Jeffers, Richard EK Russell, Mona Bafadhel

Respiratory Medicine Unit, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, UK


Abstract: Near-patient testing (NPT) allows clinical decisions to be made in a rapid and convenient manner and is often cost effective. In COPD the peripheral blood eosinophil count has been demonstrated to have utility in providing prognostic information and predicting response to treatment during an acute exacerbation. For this potential to be achieved having a reliable NPT of blood eosinophil count would be extremely useful. Therefore, we investigated the use of the HemoCue® WBC Diff System and evaluated its sensitivity and specificity in healthy, asthmatic and COPD subjects. This method requires a simple skin prick of blood and was compared to standard venepuncture laboratory analysis. The HemoCue® WBC Diff System measured the peripheral blood eosinophil count in healthy, asthma and COPD subjects with very close correlation to the eosinophil count as measured by standard venepuncture. The correlations were unaffected by disease status. This method for the measurement of the peripheral blood eosinophil count has the potential to provide rapid near-patient results and thus influence the speed of management decisions in the treatment of airway diseases.

Keywords: asthma, chronic obstructive pulmonary disease, eosinophils, near-patient testing

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