Warfarin Orders Not Discontinued, Leading to Duplicate Doses and Elevated INR
Summary
The facility failed to administer warfarin as ordered for two residents, resulting in significant medication errors. R1 had multiple diagnoses including long-term anticoagulant use, severe cognitive impairment, anemia, and recent hospitalization for sepsis-related care. The record shows R1 had an October 27, 2025 warfarin order for 1 mg on selected days, which was discontinued, but subsequent warfarin orders were entered without discontinuing prior orders. On October 28, 2025, an LPN entered a 2 mg warfarin order, and later that day another LPN entered a 4 mg warfarin order without discontinuing the 2 mg order. On October 30, 2025, another 2 mg order was entered, and the earlier 2 mg order was not discontinued until November 3, 2025. Because the overlapping orders remained active, R1 received duplicate doses of warfarin on multiple days. The MAR shows R1 received 4 mg on October 28, 6 mg on October 29, 4 mg on October 30, 31, November 1, and November 2, and INR results became progressively elevated, reaching 10.64 on November 3 and 13.10 on November 4. The facility administered phytonadione (Vitamin K) on November 3, and hospital documentation shows R1 was admitted on November 4 with a supratherapeutic INR and received another dose of phytonadione in the emergency department. Staff interviews indicated the prior warfarin order was not discontinued before new orders were entered, and the DON stated the resident received an additional 2 mg daily because of this error. R4 also experienced a warfarin medication error. R4 had diagnoses including atrial fibrillation, dementia, peripheral vascular disease, and recent orthopedic aftercare following toe amputation, and had severe cognitive impairment. The facility’s medication error report states that on October 31, 2025, R4 received an additional dose of Coumadin because the nurse obtaining the physician order failed to discontinue the previous order. The order audit shows R4 had a 5 mg warfarin order and a later 6 mg warfarin order, and the MAR shows both doses were administered on the same day for a total of 11 mg. The NP stated the prior order should have been discontinued if the physician wanted the higher dose, and noted that R4 later had an elevated INR of 5.04 related to receiving the incorrect dose.
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