Endgames onExamination Quiz

Managing a high international normalised ratio

BMJ 2011; 341 doi: http://dx.doi.org/10.1136/bmj.d251 (Published 19 January 2011) Cite this as: BMJ 2011;341:d251

This week’s question is on managing a high international normalised ratio and is taken from the onExamination revision questions for the MRCS part 2 exam.

The anticoagulation nurse phones you for advice about a 73 year old woman on warfarin for atrial fibrillation whose normal international normalised ratio range falls between 2.0 and 3.0. She has recently been started on clarithromycin for a …

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