Comparing Point of Care International Normalised Ratio testing with laboratory testing methods in a cardiac inpatient population

Michelle T Giles, Vicki Parker, Heather Bevan and Ian MR Wright

Journal of Clinical Nursing, 2010, vol. 19, issue 21‐22, 3085-3091

Abstract: Aims and objective. To compare agreement between International Normalised Ratio results from Point of Care testing with laboratory testing for cardiac inpatients receiving warfarin sodium. Background. Availability of point of care technology for International Normalised Ratio testing offers considerable benefits to patients and health care staff across a range of context. Design. Prospective comparison study. Method. Setting – Four cardiac wards in a regional referral hospital in New South Wales, Australia. Participants – 50 cardiovascular inpatients receiving warfarin therapy, including those patients being converted from intravenous heparin sodium. Intervention‐Point of Care International Normalised Ratio testing via finger prick using the CoaguChek®XS attended within one hour of laboratory International Normalised Ratio testing. Paired International Normalised Ratio results were compared using spearman rank and Mann–Whitney rank sum. Bland–Altman plots were used to demonstrate agreement. Results. One hundred and seventeen blinded paired tests were carried out, 44 on patients receiving intravenous heparin. Laboratory and Point of Care International Normalised Ratio testing were highly significantly correlated (r = 0·953, p

Date: 2010
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Persistent link: https://EconPapers.repec.org/RePEc:wly:jocnur:v:19:y:2010:i:21-22:p:3085-3091

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