Correct Answer: A

Rationale: In a client with COPD admitted with pneumonia, the priority intervention should be to administer oxygen therapy as prescribed. This is crucial to improve oxygenation, especially in a client with compromised respiratory function. Elevating the head of the bed can help with breathing but is secondary to ensuring adequate oxygenation. Obtaining a sputum culture and administering antibiotics are important steps in the treatment of pneumonia but come after ensuring adequate oxygen supply.

Correct Answer: C

Rationale: The correct answer is C, International Normalized Ratio (INR). The INR should be closely monitored in a client receiving warfarin (Coumadin) to assess the effectiveness and safety of anticoagulation therapy. Monitoring the INR helps ensure that the client is within the therapeutic range for anticoagulation to prevent complications such as bleeding or clotting. Choices A, B, and D are incorrect. While monitoring electrolyte levels like serum potassium and sodium is important in overall client care, they are not specific to monitoring the effects of warfarin therapy. Prothrombin time (PT) is a component of INR and helps in monitoring warfarin therapy, but INR gives a standardized result that is independent of the laboratory method used, making it the preferred choice for monitoring warfarin therapy.

Correct Answer: A

Rationale: Choice A is the correct answer. Renting movies and borrowing books to use at home indicate that the client understands the need for rest and self-care after chemotherapy. This behavior demonstrates the client's intention to engage in activities that promote relaxation and recovery. Choices B, C, and D are incorrect because making an appointment for follow-up treatment, expressing concern about side effects like hair loss and fatigue, and asking for dietary recommendations are important but do not directly reflect the client's understanding of her immediate care needs post-chemotherapy.

Correct Answer: D

Rationale: A platelet count of 90,000/mm3 is low and concerning for a client scheduled for a renal biopsy, as it increases the risk of bleeding. Thrombocytopenia, indicated by a low platelet count, can lead to impaired blood clotting, posing a significant risk of bleeding during or after the biopsy procedure. Elevated serum creatinine levels may be expected in chronic kidney disease but are not directly related to bleeding risk during a renal biopsy. Prothrombin time and hemoglobin levels are not as directly relevant to the bleeding risk associated with a renal biopsy as platelet count.

Correct Answer: A

Rationale: A serum potassium level of 6.0 mEq/L is most concerning in a client with ESRD scheduled for hemodialysis as it indicates hyperkalemia, which can lead to serious cardiac complications such as arrhythmias and cardiac arrest. Immediate intervention is required to lower potassium levels. Choice B, serum creatinine of 2.5 mg/dL, is elevated but expected in ESRD due to impaired kidney function. Choice C, serum calcium of 8.0 mg/dL, is within the normal range and not typically a priority in this situation. Choice D, hemoglobin of 10 g/dL, is slightly low but not an immediate concern for a client scheduled for hemodialysis unless significantly lower and causing severe symptoms.