Correct Answer: A

Rationale: The correct answer is A: Electrolyte imbalance and dehydration. Diabetic ketoacidosis can lead to imbalances in electrolytes such as potassium, sodium, and chloride, as well as dehydration due to excess urination and vomiting. These complications should be managed promptly with appropriate fluids and insulin. Choices B, C, and D are incorrect. Hypoglycemia and increased urination are not typical complications of diabetic ketoacidosis; kidney failure and respiratory distress may occur in severe cases but are not the primary complications. Liver failure and hypertension are not directly associated with diabetic ketoacidosis.

Correct Answer: A

Rationale: The correct answer is A: Administer oxygen and provide breathing exercises. These interventions are essential in managing COPD as they help improve lung function and oxygenation. Choice B is incorrect as suctioning airway secretions and encouraging coughing are not typically indicated for COPD patients. Choice C is incorrect as while administering bronchodilators is common in COPD treatment, monitoring oxygen saturation alone is not a comprehensive intervention. Choice D is incorrect as restricting fluids is not a standard intervention for COPD, and encouraging mobility, although beneficial, is not as directly related to managing COPD symptoms as administering oxygen and providing breathing exercises.

Correct Answer: A

Rationale: Correct Answer: Increasing the client's oxygen flow rate should be the nurse's first action. Hypoxia is a common complication of pneumonia and can lead to confusion. Providing adequate oxygenation is essential in addressing hypoxia and improving the client's condition.\nOption B: Obtaining vital signs is important but addressing hypoxia takes precedence in the setting of new onset confusion.\nOption C: Administering an antibiotic is important for treating pneumonia but addressing hypoxia and confusion is the priority.\nOption D: Notifying the provider may be necessary but addressing the immediate physiological need of oxygenation should come first.

Correct Answer: A

Rationale: Correct Answer: A. When assessing a patient with a potential myocardial infarction, it is crucial to assess symptoms, monitor vital signs like blood pressure and heart rate, and order an electrocardiogram (ECG) to evaluate for cardiac abnormalities. Choice B is incorrect because administering medications should be based on the findings of the assessment and diagnostic tests, not administered indiscriminately. Choice C is incorrect because the administration of thrombolytics and oxygen therapy should be based on specific criteria and should be done in a controlled setting. Choice D is incorrect as educating the patient on lifestyle changes is important for prevention but is not the immediate priority when managing a potential myocardial infarction.

Correct Answer: B

Rationale: The absence of adventitious breath sounds indicates that furosemide is effective in managing heart failure. Adventitious breath sounds such as crackles indicate fluid accumulation in the lungs, a common complication of heart failure. Therefore, the absence of these abnormal sounds suggests that furosemide is effectively reducing fluid overload. Elevated blood pressure (choice A) is not a desired outcome in heart failure management. Weight gain (choice C) and decreased urine output (choice D) are signs of fluid retention and ineffective diuresis, indicating that furosemide is not working effectively.