Which of the following diagnostic tools is used to measure ejection fraction in heart failure?

A. Weight should be measured consistently at the same time each day, ideally in the morning before eating, to accurately monitor fluid retention; subtracting food weight is not practical or accurate.
B. Gradual increase in activity is important for clients with heart failure, as long as it does not cause shortness of breath (dyspnea). This helps improve functional capacity safely.
C. A weight loss of 0.1 kg (1 lb) is not usually concerning; rapid weight gain (e.g., 2-3 pounds in a day or 5 pounds in a week) is more significant and should be reported.
D. Consistency in timing and frequency of weighing is critical; daily weighing at the same time helps detect fluid retention early.

A. Initiate isolation precautions — This is the first action the nurse should take. Bacterial meningitis is highly contagious (often spread via droplet transmission), and immediate isolation (droplet precautions) helps prevent spread to others.
B. Administer antibiotics after collecting cultures — This is a critical next step, but only after the client is placed in isolation to protect others.
C. Prepare for a lumbar puncture after ruling out increased ICP — While a lumbar puncture is important for diagnosis, increased ICP must be ruled out first, and this is not the immediate first action.
D. Start IV fluids — Supportive care is important, but it is not the priority over infection control measures.