Correct Answer: B

Rationale: When administering enoxaparin, it is important to pinch the skin to ensure proper subcutaneous injection. Massaging the injection site after administering the medication is not recommended. Administering the medication at bedtime is not a specific requirement for enoxaparin. Aspirating before injecting the medication is not necessary for subcutaneous injections like enoxaparin.

Correct Answer: A

Rationale: Administering oxygen is the initial intervention for a patient experiencing breathing difficulties post-surgery. Providing oxygen helps improve oxygenation and alleviate respiratory distress. Repositioning the patient, checking oxygen saturation, and elevating the head of the bed are important interventions but administering oxygen takes precedence in addressing hypoxia and respiratory compromise.

Correct Answer: A

Rationale: The correct answer is to administer anticoagulants. Administering anticoagulants is crucial in the management of deep vein thrombosis (DVT) as it helps prevent the clot from growing larger or dislodging, potentially causing a life-threatening pulmonary embolism. While monitoring oxygen levels, applying compression stockings, and encouraging ambulation are important aspects of DVT management, administering anticoagulants is the most critical intervention to prevent further complications.

Correct Answer: B

Rationale: The correct answer is B. A high PaCO2 level (55 mm Hg) in a client with chronic emphysema suggests respiratory acidosis, which requires further treatment. In chronic emphysema, impaired gas exchange leads to elevated carbon dioxide levels in the blood. Option A (PaO2 level of 89 mm Hg) is near the normal range and does not indicate immediate treatment. Option C (HCO3 level of 25 mEq/L) and option D (pH level of 7.37) are within normal limits and do not suggest the need for further treatment in this context.

Correct Answer: C

Rationale: The correct initial action when a patient presents with chest pain is to obtain an ECG. This helps assess the heart's electrical activity and determine the cause of chest pain. Administering aspirin or oxygen therapy may be necessary later based on the ECG findings, but obtaining an ECG is the priority to evaluate the cardiac status. Surgery preparation is not the initial action for chest pain and should only be considered after a thorough assessment.