Correct Answer: A

Rationale: The correct answer is to monitor aPTT. Activated Partial Thromboplastin Time (aPTT) is crucial to monitor when a patient is receiving heparin therapy. Heparin works by potentiating antithrombin III, leading to the inhibition of thrombin and factor Xa. Monitoring aPTT helps ensure the patient is within the therapeutic range for heparin, reducing the risk of bleeding complications. Monitoring INR (Choice B) is more relevant for patients on warfarin therapy. Monitoring potassium (Choice C) and sodium levels (Choice D) is important but not specific to heparin therapy.

Correct Answer: B

Rationale: When a patient presents with confusion, the best initial action is to perform a neurological assessment. This assessment helps in identifying potential causes of confusion such as neurological issues, infections, metabolic abnormalities, or medication side effects. Administering IV fluids (Choice A) may be necessary based on assessment findings, but it is not the first step. Administering electrolytes (Choice C) would also depend on the assessment results. Preparing for a CT scan (Choice D) may be indicated later in the diagnostic process but is not the initial action when a patient presents with confusion.

Correct Answer: A

Rationale: Administering oxygen is the initial step in managing chest pain. Oxygen helps improve oxygenation levels in the blood, which is crucial in cases of chest pain. Repositioning the patient, providing pain relief, or administering nitroglycerin may be necessary steps depending on the underlying cause, but administering oxygen takes precedence as it addresses the primary concern of oxygen supply to the body during chest pain.

Correct Answer: A

Rationale: The correct answer is A, Broccoli. Foods high in tyramine, such as broccoli, should be avoided when taking MAOIs like phenelzine to prevent a hypertensive crisis. Yogurt, cream cheese, and fruit juice do not contain significant levels of tyramine and can be safely consumed while on phenelzine.

Correct Answer: D

Rationale: The correct answer is D. Warmth and redness in the calf are indicative of a possible deep vein thrombosis (DVT), a serious complication post-surgery that requires immediate attention. Reporting this finding promptly to the provider is crucial for timely intervention. Choices A, B, and C are within normal limits for a postoperative client and do not indicate a potentially life-threatening condition like DVT.