Abstract
The international normalized ratio (INR) is the current standard for monitoring anticoagulation therapy. Although simple to determine, it normally requires venipuncture and extensive laboratory resources for specimen handling and analysis. The portable capillary whole blood coagulation monitor is an alternative to laboratory venipuncture. Its promoted advantages are: it obtains a blood sample by finger-stick versus venipuncture; rapid turnaround time for results; resultant dosage adjustments (as appropriate) performed in minutes versus hours or days after testing; relative ease of use by nonlaboratory personnel; and potential for home monitoring. This project compared the results of INRs obtained through the venipuncture/laboratory process to INRs obtained by the portable monitoring process at the National Naval Medical Center. A correlation coefficient of 0.97 was determined. The difference in the mean INR results of the two testing methods was not clinically significant (p = 0.269). The portable monitor was determined to be a viable alternative to laboratory testing.
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