Final answer:
The nurse's first priority action should be to call the healthcare provider about the new onset of confusion to ensure prompt evaluation and management of the patient's condition.
Step-by-step explanation:
The nurse's first priority action should be to Call the healthcare provider about the new onset of confusion. While the patient's blood pressure is within the desired range, the acute confusion may be a symptom of decreased tissue perfusion which requires further evaluation and management. By reporting the new finding to the healthcare provider, the nurse can ensure prompt assessment and appropriate intervention to address the patient's condition.