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We compared the INR (International Normalized Ratio) monitoring process using a telemedicine device with the conventional approach in which blood samples were sent to the hospital for analysis. We conducted a randomized controlled trial. We enrolled 40 patients on chronic warfarin therapy from two primary healthcare centres (PHCs). Half were monitored using the telemedicine device and half were monitored conventionally. Each patient received three INR measurements. The total processing time was measured from blood sampling until warfarin dosing was performed in the anticoagulant clinic. The median total processing time was significantly shorter with telemedicine than usual care (34 vs. 260 min, P < 0.001). This was mainly because sample transport was avoided using the point-of-care device and automatic data transmission. Telemedicine reduced the total processing time for INR monitoring and has the potential to improve the management of patients undergoing anticoagulant treatment at PHCs.


Kurt Boman, Thomas Davidson, Mats Gustavsson, Mona Olofsson, Gun-Britt Renström, Lars Johansson. Telemedicine improves the monitoring process in anticoagulant treatment. Journal of telemedicine and telecare. 2012 Sep;18(6):312-6

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PMID: 22892374

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