Correct Answer: A

Rationale: The correct answer is A: Diabetic ketoacidosis and dehydration. Untreated hyperglycemia can lead to diabetic ketoacidosis, a serious complication characterized by high blood sugar, the presence of ketones in the urine, and acidosis. Dehydration is also a common complication of untreated hyperglycemia. Choices B, C, and D are incorrect because hypoglycemia and hypertension are not typical complications of untreated hyperglycemia. Infection and liver failure, as well as pulmonary edema and electrolyte imbalance, are also not direct complications of untreated hyperglycemia.

Correct Answer: C

Rationale: In this situation, the nurse's priority is to determine if the client is experiencing psychotic thinking as it addresses the immediate safety concern. Psychotic thinking may pose a risk to the client's safety or the safety of others. Referring the client to a mental health counselor (choice A) may be appropriate but not the priority when safety is a concern. Encouraging the client to express their feelings (choice B) and asking about their social support system (choice D) are essential aspects of care but are secondary to addressing immediate safety issues.

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: D

Rationale: The correct answer is D. A sudden weight increase may indicate fluid retention, a complication of TPN therapy that should be reported. Options A, B, and C are within normal ranges and do not directly relate to TPN therapy complications. A blood glucose level of 120 mg/dL is normal, a white blood cell count of 8,000/mm³ is within the normal range, and a temperature of 37.2°C (99°F) is also normal.

Correct Answer: D

Rationale: In managing hyperkalemia, it is essential to administer insulin and glucose to shift potassium into the cells, restrict potassium intake to prevent further elevation of serum levels, and monitor the ECG for signs of potassium-induced cardiac effects. Therefore, the correct answer is D, as all of the provided actions are important in the management of hyperkalemia. Choice A alone is not sufficient as it only addresses shifting potassium intracellularly without preventing further elevation. Choice B alone is not enough as it does not address the immediate need to lower serum potassium levels. Choice C alone is insufficient as it only monitors for cardiac effects without addressing potassium levels or shifting mechanisms.