Correct Answer: C

Rationale: A blood glucose level of 55 mg/dL indicates hypoglycemia, which should be treated with a fast-acting carbohydrate to quickly raise the blood sugar. Administering 15 grams of a fast-acting carbohydrate, such as glucose tablets or juice, is the appropriate initial intervention for hypoglycemia. Giving a glucagon injection is reserved for severe cases or when the client is unconscious. Encouraging the client to eat a high-protein snack is not appropriate for treating acute hypoglycemia, as it is a slower-acting form of glucose. Rechecking the blood glucose level is important but should occur after providing immediate treatment to raise the blood sugar level.

Correct Answer: D

Rationale: In emergency situations where immediate surgery is required to save a patient's life and no family members are available, consent can be waived to proceed with necessary interventions. The priority in this scenario is to proceed with surgery preparation without waiting for consent, as any delay could jeopardize the patient's life. Asking the friend to sign informed consent or notifying the unit manager for a court order would cause unnecessary delays, which are not advisable in this critical situation. Continuing life support until a guardian is found is not the most appropriate action when immediate surgical intervention is necessary.

Correct Answer: B

Rationale: Fixed, dilated pupils are a sign of increased intracranial pressure or brain injury, indicating a potentially serious neurological condition. Flaccid paralysis, although concerning, may not always indicate immediate life-threatening issues. Diminished spinal reflexes and reduced sensory responses are important neurological assessments but are not as acutely concerning as fixed, dilated pupils in this context.

Correct Answer: B

Rationale: An S3 heart sound is often a normal finding in pregnant women due to increased blood volume and cardiac output. The nurse should document the finding as part of the routine assessment unless accompanied by other abnormal symptoms. Performing a 12-lead electrocardiogram (Choice A) is unnecessary for a normal S3 heart sound in pregnancy. Notifying the healthcare provider immediately (Choice C) is premature and may lead to unnecessary interventions. Assessing for signs of heart failure (Choice D) is not indicated as an isolated S3 heart sound is typically benign in pregnancy.

Correct Answer: B

Rationale: Corrected Rationale: Prolonged exposure to high oxygen concentrations can disrupt the production of surfactant in the lungs, leading to atelectasis and other lung complications. Surfactant is essential for maintaining lung compliance and preventing alveolar collapse. Reduced cardiac output (Choice A) is not directly associated with prolonged oxygen exposure. Hyperactivity of alveoli (Choice C) is not a recognized consequence of high oxygen levels. Increased oxygen carrying capacity (Choice D) is not a pathophysiological effect of prolonged high oxygen exposure.