Correct Answer: D

Rationale: Serum osmolarity is the most important laboratory test for confirming hyperosmolar hyperglycemic nonketotic syndrome (HHNS). HHNS is characterized by severe hyperglycemia and dehydration without ketoacidosis. Elevated serum osmolarity indicates increased solute concentration in the blood, which is a hallmark of HHNS. Serum potassium level (Choice A) is important in conditions like diabetic ketoacidosis rather than HHNS. Serum sodium level (Choice B) may be affected in HHNS but is not the primary test for confirming the disorder. Arterial blood gas (ABG) values (Choice C) are more useful in assessing acid-base status, which is not the primary concern in HHNS.

Correct Answer: B

Rationale: The correct answer is to check blood glucose before meals and at bedtime. Monitoring blood glucose levels before meals allows the client to adjust their insulin or oral antidiabetic medications based on their current levels. Checking at bedtime helps in ensuring blood glucose levels are at a safe range throughout the night. Option A is incorrect because blood glucose should be monitored regularly as part of diabetes management, not just when feeling unwell. Option C is incorrect because checking only after meals does not provide a complete picture of blood glucose control throughout the day. Option D is incorrect as checking only in the morning does not cover the full spectrum of blood glucose variations that can occur during the day.

Correct Answer: C

Rationale: The correct answer is C: Low-grade fever. A low-grade fever may indicate an infection, which is a serious concern in clients with Cushing's syndrome due to their immunosuppressed state. Hypertension and hyperglycemia are common manifestations of Cushing's syndrome and may not require immediate reporting unless severe or uncontrolled. Weight gain is also a common symptom in clients with Cushing's syndrome and may not warrant immediate reporting unless it is sudden and significant.

Correct Answer: C

Rationale: A blood pH of 7.25 is a critical finding in diabetic ketoacidosis (DKA) as it indicates metabolic acidosis, which is a hallmark of this condition. In DKA, there is an accumulation of ketones in the blood, leading to increased acidity. The serum glucose level is typically elevated in DKA, often exceeding 250 mg/dL. A serum bicarbonate level less than 18 mEq/L is usually seen in DKA due to the metabolic acidosis. Urine specific gravity is not a specific indicator for DKA and may vary depending on the individual's hydration status. Therefore, the correct lab finding that confirms DKA in this scenario is a blood pH of 7.25.

Correct Answer: B

Rationale: A client with hyperparathyroidism is at risk for osteoporosis, not hypocalcemia, hypokalemia, or hyponatremia. Hyperparathyroidism results in increased levels of parathyroid hormone, which causes excessive breakdown of bone tissue to release calcium into the bloodstream. This process can lead to weakened bones and an increased risk of osteoporosis. Hypocalcemia is unlikely in hyperparathyroidism as the condition is characterized by elevated calcium levels due to the abnormal activity of the parathyroid glands. Hypokalemia and hyponatremia are not directly associated with hyperparathyroidism; they are more commonly linked to other conditions affecting potassium and sodium levels in the body.