A Mother Finds Her 4-Year-Old Daughter with a Bag of Rat

A mother finds her 4-year-old daughter with a bag of rat poison.The child has already eaten almost the whole amount in the bag.It turns out that the active ingredient of the rat poison is warfarin.On seeing this child in the emergency room 1 hour later, what should you do?

A) Tell the mother that the child is going to die in a few hours.
B) Inject a high dose of tissue-type plasminogen activator, then keep monitoring the prothrombin time over the next days.
C) Make an exchange transfusion immediately, then keep monitoring the activated partial thromboplastin time over the next days.
D) Transfuse fresh-frozen plasma immediately, to replace the defective clotting factors.
E) Perform gastric lavage, inject a high dose of vitamin K, and keep monitoring the prothrombin time over the next days.