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Home INR monitoring is safe

A recent study has shown finger stick INR monitoring of warfarin keeps blood levels within the target range when done by patients at home.

Weekly home INR monitoring reduced the rate of first major bleeding event, death, or stroke by about an absolute 1% compared with standard clinic monitoring.

The study findings were reported by David Matchar, of Duke University in Durham, N.C., at an American Heart Association meeting.

The home INR monitoring study

The researchers conducted the Home INR Study (THINRS) to compare methods among 2,922 warfarin-treated patients at VA centers, over a 3 year period.

Participants either had;

  • monthly INR measurements by a trained staff member according to local standard management algorithms, or
  • weekly self testing at home reported using an interactive telephone voice response system.

The significant increase of about 7% in time in the target INR range with home versus clinic-based testing included an apparent divergence between groups over time.

Researchers comments

Dr Matchar co-chair of the trial said, “We suggest that these results support that home INR testing is an acceptable alternative to high-quality anticoagulation management, such as in an anticoagulation clinic, and it may be preferable when patient access is difficult, such as might occur with patients with disabilities or [patients who live at a] geographic distance.”


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About Kellie

Kellie is 37 years old and together with her brother Steve makes up the My Health Software team.

She helps on the websites and gathering news for the programs. Kellie worked in the medical industry prior to having her two children (8 and 6) and has a strong interest in self awareness and management of health conditions.


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