Correct Answer: C

Rationale: Elevated urine specific gravity is a sign of dehydration in children. In the scenario provided, the child is experiencing increased stool frequency, liquid consistency, fever, and vomiting, indicating fluid loss and potential dehydration. Occult blood in the stool may suggest gastrointestinal bleeding but is not a direct indicator of dehydration. Abdominal distention can be seen in various conditions and is not specific to dehydration. Hyperactive bowel sounds are more commonly associated with increased bowel motility, not necessarily dehydration.

Correct Answer: A

Rationale: The correct answer is A: Avoiding the administration of high levels of oxygen for extended periods. Oxygen toxicity can occur when high levels of oxygen are given for a prolonged period. It is important to monitor and adjust the oxygen levels as needed to prevent toxicity. Choice B is incorrect because administering a sedative to slow the respiratory rate does not directly prevent oxygen toxicity. Choice C is incorrect as removing the nasal cannula during the night can compromise the client's oxygenation. Choice D is incorrect as running oxygen through a hydration source does not prevent oxygen toxicity; instead, it may introduce risks associated with the hydration source.

Correct Answer: B

Rationale: The correct instruction is to advise the client to avoid alcohol while taking phenytoin. Alcohol can interact with phenytoin, making it less effective and leading to increased side effects. Taking the medication with meals (Choice A) may help reduce gastrointestinal upset but is not the most crucial instruction for this medication. Limiting sodium intake (Choice C) is not directly related to phenytoin therapy. Taking the medication at bedtime (Choice D) is not a standard instruction for phenytoin administration.

Correct Answer: C

Rationale: Pain in the lower back is a significant finding in an older client as it can indicate underlying issues such as kidney problems, spinal issues, or even aortic aneurysm. These conditions can be serious and require prompt medical attention. Decreased urine output (choice A) could indicate dehydration or kidney issues but is not as urgent as lower back pain. Loss of appetite (choice B) may be concerning but is not as critical as the potential life-threatening conditions associated with lower back pain. A persistent cough (choice D) is important to assess but is generally not as urgent as the potential serious implications of lower back pain in an older client.

Correct Answer: A

Rationale: The correct action for a client with type 1 diabetes mellitus experiencing hypoglycemia with a blood glucose level of 60 mg/dl is to administer 15 grams of carbohydrate. This will help raise the blood glucose levels quickly. Administering a glucagon injection (Choice B) is usually reserved for severe hypoglycemia where the client is unconscious or unable to swallow. Providing a snack with protein (Choice C) is not the first-line treatment for hypoglycemia as protein takes longer to raise blood glucose levels. Encouraging the client to rest (Choice D) may be beneficial after administering the carbohydrate, but the priority is to raise the blood glucose levels promptly.