Final answer:
The patient who is most likely to develop ATN is the patient with major surgery who required a blood transfusion.
Step-by-step explanation:
The patient who is most likely to develop Acute Tubular Necrosis (ATN) is the patient with major surgery who required a blood transfusion.
ATN is the most common cause of intrarenal acute kidney injury (AKI). It occurs when there is damage to the renal tubules, which can be caused by ischemia or toxins. Patients who undergo major surgeries and require blood transfusions are at a higher risk for developing ATN due to the potential for decreased blood flow to the kidneys during surgery and the administration of nephrotoxic medications or contrast agents during the transfusion.