Misinterpreting Her Physician's Instructions, a 69-Year-Old Woman with a History

Multiple Choice

Misinterpreting her physician's instructions, a 69-year-old woman with a history of peripheral artery disease has been taking two 325 mg tablets of aspirin daily. How has this most likely affected her hemostatic status?

A) Irreversible acetylation of platelet cyclooxygenase activity has occurred.
B) ^{The patient's prostaglandin (TXA}2^{) levels are abnormally high.}
C) She is at risk of developing secondary immune thrombocytopenic purpura (ITP) .
D) The binding of an antibody to platelet factor IV produces immune complexes.