The most serious manifestation of lead intoxication is

Correct Answer: D

Rationale: Cerebral edema is the most serious manifestation of lead intoxication, as it can be life-threatening.

Correct Answer: C

Rationale: Infants typically triple their birth weight by 12 months. For an 8-lb infant, that would be approximately 24 lb.

Correct Answer: A

Rationale: CT scan of the neck and chest can help identify a primary neuroblastoma mass in the adrenal gland or sympathetic chain.

Correct Answer: B

Rationale: The appropriate nursing diagnosis is Fluid volume deficit R/T uncontrolled vomiting. This diagnosis is the most specific and directly related to the issue of vomiting causing a loss of fluids, leading to a deficit in fluid volume. Uncontrolled vomiting can result in a significant loss of fluids and electrolytes, which can lead to dehydration. It is important to address the root cause of the fluid volume deficit, which in this case is the uncontrolled vomiting. The other options may not directly address the primary issue of fluid loss due to vomiting.

Correct Answer: C

Rationale: Oxygen therapy for patients with emphysema aims to maintain adequate oxygen levels in the blood while avoiding toxic levels of oxygen. The recommended flow rate for oxygen administration in patients with emphysema is typically 1-3 liters per minute. Increasing the flow rate above this range may lead to oxygen toxicity in these patients. Therefore, a safe and appropriate oxygen flow rate for a patient with emphysema would be around 6 L/min, making option C, 6 L/min, the correct choice from the provided options.