A female client is being treated for a deep-vein thrombus she developed post-operatively about one week ago and was treated with unfractionated heparin. Today she presents to the clinic with petechiae on bilateral hands and feet. Laboratory results show a platelet count of 42,000/mm³. The nurse is concerned about a drug reaction and anticipates the client has which of the following?
Correct Answer: A
Rationale: Heparin can backfire petechiae and a platelet plunge to 42,000/mm³ post-DVT treatment scream HIT, an immune reaction trashing platelets, risking clots. Hemophilia's genetic, not drug-tied. TTP adds fever, neuro signs absent here. Sickle crisis pains, not bleeds like this. Nurses suspect HIT, anticipating heparin cessation and alternatives, a twist in this anticoagulation tale.