Leadership and Management HESI

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: D

Rationale: Pheochromocytoma is a tumor of the adrenal medulla that secretes excessive catecholamines, leading to symptoms such as hypertension. The normal blood pressure range is around 120/80 mm Hg, so a blood pressure reading of 176/88 mm Hg is most likely to be detected in a client with pheochromocytoma. Choices A, B, and C are incorrect because pheochromocytoma typically presents with hypertension, not a normal or low blood pressure (choice A), not related to blood glucose levels (choice B), and not bradycardia (choice C).

Correct Answer: D

Rationale: Polyuria, polydipsia, and polyphagia are classic signs of hyperglycemia, indicating high blood glucose levels. The priority action for the nurse is to check the client's blood glucose levels to assess the severity of hyperglycemia and determine the need for appropriate interventions. Administering insulin (Choice A) may be necessary based on the blood glucose levels but should only be done after confirming the current status. Encouraging increased fluid intake (Choice B) may exacerbate the symptoms by further diluting the blood glucose concentration. While monitoring for signs of dehydration (Choice C) is important in the long term, the immediate action should focus on determining the blood glucose levels first.

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.

Correct Answer: B

Rationale: It is common practice to administer 25-40% of the morning dose of insulin preoperatively to prevent hypoglycemia during surgery. Giving a lower percentage (A) may not provide sufficient glycemic control, while higher percentages (C, D) can increase the risk of hypoglycemia during the surgical procedure.