Published in Medical Letter on the CDC and FDA, September 16th, 2001
St. Agnes Medical Center incorrectly interpreted a test used to measure blood clotting, leading dozens of patients to receive overdoses of a blood thinner. Two people died as a result, the city medical examiner ruled.
The lab error involved the prothrombin time (PT) test, which measures blood thickness. Physicians routinely use the test and the International Normalized Ratio to monitor the effect of warfarin, a widely prescribed anticoagulant...
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