International Normalised Ratio Evaluation by Generalist Practitioners in Full-time Care Establishments for the Elderly

"We will be using the CoagucheckXSR device for capillary INR measures performed by nurses every 7 days during the 6 months of the study, plus after related intercurrent events.~If capillary INR is \<2 or \>3 (with a tolerance of 1.9 to 3.1 given the margin of measurement inaccuracy of the coagulometer), then a classic venous measure is performed. If both tests agree, adaptation of treatment as indicated. If slightly discordant results, then the INR values are considered discordant and the decision to adjust the treatment dose and the next monitoring date for venous INR is made based on the value of the venous INR, according to the predefined protocol. If clinically significant discordance (\> 0.3), a venous INR is reperformed within 24 hours and if the discrepancy persists, dose adjustment is made according to the venous INR and the predefined protocol.~If capillary INR is \> 4, then verification by venous measure and refer to general practitioner."