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INR easily monitored at home

BMJ 2007; 334 doi: (Published 03 May 2007) Cite this as: BMJ 2007;334:928

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A portable coagulometer (CoaguChek XS, Roche Diagnostics Australia), which measures blood international normalised ratio (INR) on a fingerprick sample proved accurate and easy to use. Tasmanian patients received two training sessions and then had near synchronous tests performed with the device and by a standard laboratory method. Paired results were highly correlated (r = 0.91) and only three (5%) of the home tests differed from laboratory results by >20% or were discrepant by >0.5 INR units. Further tests are needed to evaluate its accuracy outside standard INR target ranges.


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