Correct Answer: C

Rationale: Monitoring vital signs and oxygen saturation during activity ensures the nurse can detect early signs of respiratory distress or hypoxia, promoting client safety. Encouraging deep, rapid breathing may exacerbate dyspnea and is not safe. Providing environmental stimulation is unrelated to respiratory safety. Scheduling activities before respiratory medications or treatments could worsen dyspnea, as these interventions improve breathing capacity.

Correct Answer: C

Rationale: Defibrillation is an asynchronous countershock used to terminate pulseless ventricular tachycardia (VT) or ventricular fibrillation (VF). The defibrillator is charged to 120 to 200 joules (biphasic) or 300 joules (monophasic) for 1 countershock from the defibrillator, and then CPR is immediately resumed and continued for 5 cycles or about 2 minutes. The rhythm is reassessed after 2 minutes and if VF or pulseless VT continues, the defibrillator is charged to give a second shock at the same energy level previously used. CPR is resumed after the shock if needed and the life support protocol is continued. There is no information in the question to indicate that life support should be terminated. Sodium bicarbonate may be prescribed but is not the best action. Giving CPR for 5 minutes may not help oxygenation to the brain and myocardium and is not the best action.

Correct Answer: B

Rationale: Pain control is essential to enable effective deep breathing and incentive spirometry, which prevent atelectasis and pneumonia by promoting lung expansion. Oxygen and fluid intake are supportive but secondary.

Correct Answer: A

Rationale: Moderate discomfort in early labor is managed with non-pharmacologic comfort measures and breathing techniques to promote coping.

Correct Answer: D

Rationale: Yellowing of the skin within 24 hours suggests pathological jaundice, requiring immediate evaluation to prevent complications like kernicterus.