The patient reported being unable to obtain an inr result on the coaguchek xs system due to a device error.The reported error (error 7) can occur when a patient has an inr result >8.0 inr.The following day the patient went to the hospital; a lab value returned as 14.5 inr and the patient was treated with 5 units of plasma and vitamin k.The patient's coumadin dose was held based on the lab value.The patient went home the same day as the incident.Requested return of suspect system and replacement was sent.
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