MS-2719

MS-2719

A 75-year-old man, Tom, is brought into the emergency department after a fall. He was discovered by his daughter. Tom is disoriented and unable to provide a clear explanation of what happened. His daughter knows that Tom takes a blood thinner but cannot recall its name. She does know that Tom began taking it after having a metallic heart valve and that he can no longer eat grapefruit for breakfast.

A CT scan of Tom’s head reveals a significant acute subdural hemorrhage, and the emergency department physician prescribes IV vitamin K.

How does IV vitamin K assist in this situation?