Correct Answer: C

Rationale: The correct answer is C. Crackles in the lungs indicate fluid overload, a common issue in heart failure patients. Immediate intervention is necessary to prevent worsening heart failure symptoms and potential complications. A heart rate of 60 beats per minute and a blood pressure of 100/60 mmHg are within normal ranges for many individuals and do not typically require immediate intervention in this context. The presence of a new murmur may be important to monitor but is not the priority when crackles in the lungs suggest fluid overload.

Correct Answer: D

Rationale: The correct answer is D. Clear breath sounds indicate that the pneumonia is resolving and the treatment is effective. Breath sounds are often muffled or crackling in pneumonia due to the presence of fluid or inflammation in the lungs. Clear breath sounds suggest that the air is moving freely through the lungs, indicating improvement. Choices A, B, and C are less specific indicators of pneumonia resolution. While less chest pain and a decreasing white blood cell count can be positive signs, they are not as direct in indicating the effectiveness of pneumonia treatment as the presence of clear breath sounds. A decreased respiratory rate could be seen in various conditions and may not solely indicate the resolution of pneumonia.

Correct Answer: A

Rationale: The correct answer is A: Arterial blood gas (ABG) values. In a client with COPD and pneumonia, ABG values are crucial as they provide essential information about the client's respiratory status, including oxygenation and acid-base balance. Immediate intervention may be required to optimize respiratory function based on ABG results. Serum potassium, sodium, and blood glucose levels are important parameters to monitor in various conditions but are not as directly related to the respiratory status in a client with COPD and pneumonia. Therefore, they do not require immediate intervention compared to ABG values.

Correct Answer: A

Rationale: The correct answer is A: Stridor. Stridor is a high-pitched, noisy breathing sound that indicates a potential airway obstruction, which can be caused by an allergic reaction. This finding requires immediate intervention by the nurse to ensure the client's airway is patent and to prevent respiratory distress. Nausea, headache, and pruritus are potential side effects of ceftriaxone sodium but do not pose immediate life-threatening risks compared to airway obstruction indicated by stridor.

Correct Answer: A

Rationale: Administering intravenous insulin is the initial priority in managing diabetic ketoacidosis (DKA). Insulin helps to reduce blood glucose levels and correct metabolic acidosis, addressing the underlying cause of DKA. Monitoring urine output (choice B) is important but is not the first intervention needed. Administering intravenous fluids (choice C) is essential to correct dehydration in DKA, but insulin therapy takes precedence. Administering 50% dextrose IV push (choice D) is contraindicated in DKA as it can exacerbate hyperglycemia.