Measuring international normalized ratios in long-term care: a comparison of commercial laboratory and point-of-care device results.

Objectives: Point-of-care (POC) anticoagulation testing devices can potentially improve warfarin therapeutics in long-term care; however, there is variable accuracy reported for these devices and scant data when used in older adults. Accordingly, we undertook this study to determine the accuracy of a POC device (Hemosense INratio) in long-term care settings and examine factors associated with discrepant results.

Design: Case series.