Correct Answer: A

Rationale: The priority nursing action when a patient with chest pain presents with possible acute coronary syndrome is to administer sublingual nitroglycerin. Sublingual nitroglycerin helps dilate blood vessels, reducing cardiac workload, and improving blood supply to the heart muscle, thus relieving pain and enhancing blood flow to the heart. While obtaining IV access is important for administering medications and fluids, it is not the priority over addressing pain and improving blood flow. Checking the patient's cardiac enzymes is crucial for diagnosis and ongoing management but not the immediate priority when the patient is in pain. Administering aspirin is also a vital intervention in acute coronary syndrome, but in this scenario, it is not the priority action compared to providing immediate pain relief and enhancing blood flow to the heart.

Correct Answer: A

Rationale: Administering sublingual nitroglycerin is the priority action in the treatment of chest pain in acute coronary syndrome. Nitroglycerin helps dilate blood vessels, improving blood flow to the heart and relieving chest pain. Aspirin can also be given to reduce clot formation, but nitroglycerin takes precedence in providing immediate relief. Obtaining cardiac enzymes and assessing heart sounds are important steps in the diagnostic process but do not address the immediate need to relieve chest pain and prevent cardiac tissue damage. Therefore, administering sublingual nitroglycerin is the most appropriate initial intervention for a patient presenting with chest pain and possible acute coronary syndrome.

Correct Answer: A

Rationale: The correct answer is A: Restlessness, confusion, irritability. These are early signs of increased intracranial pressure (IICP) and require prompt intervention. Restlessness, confusion, and irritability are indicative of the brain's attempt to compensate for the rising pressure. Choice B is incorrect because severe headache alone is not specific to IICP and can be present in various conditions. Choice C is incorrect because elevated blood pressure is not a common sign of IICP; instead, hypertension may be present in the compensatory stage. Choice D is incorrect as bradycardia and altered pupil response are signs of advanced IICP, not early signs. Monitoring and recognizing these early signs are crucial for timely intervention and preventing further complications.

Correct Answer: A

Rationale: The correct answer is A: CD4 T-cell count below 180 cells/mm3. Monitoring the CD4 T-cell count is crucial in patients with HIV as it reflects the status of the immune system. A CD4 T-cell count below 180 cells/mm3 indicates severe immunocompromise and an increased risk of opportunistic infections. This value guides the initiation of prophylaxis for infections and the timing of antiretroviral therapy initiation. Choices B, C, and D are not the priority lab values in monitoring patients with HIV. Hemoglobin levels primarily assess for anemia, serum albumin levels reflect nutritional status, and white blood cell count is more generalized and may not specifically indicate the severity of immunocompromise in HIV patients.

Correct Answer: C

Rationale: Hyponatremia places the patient at risk for cardiac dysrhythmias. While hyponatremia can lead to seizures due to cerebral edema caused by fluid imbalance, the most immediate and life-threatening risk is cardiac dysrhythmias. Low sodium levels can disrupt the heart's electrical activity, potentially leading to fatal arrhythmias. Although fatigue and muscle weakness are symptoms of hyponatremia, cardiac dysrhythmias pose the most critical concern as they can have severe consequences.