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A client with type 1 diabetes mellitus presents with nausea, vomiting, and abdominal pain. The nurse suspects diabetic ketoacidosis (DKA). Which of the following lab findings would confirm this diagnosis?
- A. Serum glucose of 180 mg/dL
- B. Serum bicarbonate of 22 mEq/L
- C. Blood pH of 7.25
- D. Urine specific gravity of 1.020
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.
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When assessing a male client with pheochromocytoma, a tumor of the adrenal medulla that secretes excessive catecholamines, Nurse April is most likely to detect:
- A. A blood pressure of 130/70 mm Hg
- B. A blood glucose level of 130 mg/dl
- C. Bradycardia
- D. A blood pressure of 176/88 mm Hg
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).
The healthcare provider is assessing a client with hypothyroidism. Which of the following clinical findings would the healthcare provider expect?
- A. Tachycardia
- B. Weight loss
- C. Cold intolerance
- D. Diaphoresis
Correct Answer: C
Rationale: Cold intolerance is a classic symptom of hypothyroidism. In hypothyroidism, the body's metabolic rate is decreased, leading to a reduced ability to regulate body temperature. As a result, individuals with hypothyroidism often feel cold, especially in their extremities. Tachycardia (A) is more commonly associated with hyperthyroidism due to the increased metabolic rate. Weight loss (B) is also a typical finding in hyperthyroidism, as the body burns calories at a faster rate. Diaphoresis (D), excessive sweating, is not a typical symptom of hypothyroidism.
A client with Addison's disease is being educated about managing the condition during times of stress. The nurse should instruct the client to:
- A. Double the dose of corticosteroids during periods of stress.
- B. Skip the dose of corticosteroids if you feel well.
- C. Decrease fluid intake to prevent hypertension.
- D. Avoid physical activity during stressful times.
Correct Answer: A
Rationale: Clients with Addison's disease should be educated to double their corticosteroid dosage during periods of stress. This is crucial to prevent adrenal crisis, as stress can increase the body's demand for cortisol. Skipping doses when feeling well can lead to an adrenal crisis if stress occurs suddenly. Decreasing fluid intake can exacerbate dehydration and electrolyte imbalances, which are already concerns in Addison's disease. Avoiding physical activity during stressful times is not the most appropriate advice; moderate physical activity can be beneficial, as long as the client is adequately managing their corticosteroid regimen.
A client with Cushing's syndrome is being monitored for complications. Which of the following findings should the nurse report to the healthcare provider immediately?
- A. Hypertension
- B. Hyperglycemia
- C. Low-grade fever
- D. Weight gain
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.
A male client with a tentative diagnosis of hyperosmolar hyperglycemic nonketotic syndrome (HHNS) has a history of type 2 diabetes that is being controlled with an oral diabetic agent, tolazamide (Tolinase). Which of the following is the most important laboratory test for confirming this disorder?
- A. Serum potassium level
- B. Serum sodium level
- C. Arterial blood gas (ABG) values
- D. Serum osmolarity
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.