HESI LPN
CAT Exam Practice Test
1. A client is admitted to the hospital with a serum sodium level of 128 mEq/L, distended neck veins, and lung crackles. What intervention should the nurse implement?
- A. Increase the intake of salty foods
- B. Administer NaCl supplements
- C. Restrict oral fluid intake
- D. Hold the client's loop diuretic
Correct answer: C
Rationale: In the scenario described, the client presents with signs of fluid overload and hyponatremia. Restricting oral fluid intake is the appropriate intervention to manage fluid overload and correct hyponatremia. Increasing the intake of salty foods (Choice A) and administering NaCl supplements (Choice B) would exacerbate the sodium imbalance. Holding the client's loop diuretic (Choice D) is not directly related to addressing the fluid overload and hyponatremia.
2. Which client requires careful nursing assessment for signs and symptoms of hypomagnesemia?
- A. A young adult client with intractable vomiting from food poisoning
- B. A client who developed hyperparathyroidism in late adolescence
- C. A middle-aged male client in renal failure following an unsuccessful kidney transplant
- D. A female client who is overzealous with her intake of simple carbohydrates
Correct answer: A
Rationale: The correct answer is A. Vomiting can lead to significant loss of magnesium, causing hypomagnesemia. In this scenario, the young adult client with intractable vomiting from food poisoning is at higher risk of developing hypomagnesemia due to the loss of magnesium through vomiting. Choices B, C, and D are less likely to present with hypomagnesemia. Hyperparathyroidism (B) is associated with hypercalcemia, renal failure (C) can lead to hypermagnesemia, and overconsumption of simple carbohydrates (D) is not directly linked to magnesium imbalances.
3. When caring for a client with diabetes insipidus (DI), it is most important for the nurse to include frequent assessment for which conditions in the client’s plan of care?
- A. Dry mucous membranes, hypotension
- B. Decreased appetite, headache
- C. Nausea and vomiting, muscle weakness
- D. Elevated blood pressure, petechiae
Correct answer: A
Rationale: Dry mucous membranes and hypotension are key indicators of dehydration in clients with diabetes insipidus. The excessive urination associated with DI can lead to fluid loss, resulting in dehydration. Therefore, monitoring for signs such as dry mucous membranes and hypotension is crucial to assess the client's hydration status. Choices B, C, and D are not directly related to the characteristic symptoms of DI and are less relevant in the context of this condition. Decreased appetite and headache (Choice B) are nonspecific symptoms that may occur in various conditions. Nausea, vomiting, and muscle weakness (Choice C) are not typical manifestations of DI. Elevated blood pressure and petechiae (Choice D) are not commonly associated with DI; instead, hypotension is more commonly observed due to volume depletion.
4. A child with heart failure (HF) is taking digitalis. Which sign indicates to the nurse that the child may be experiencing digitalis toxicity?
- A. Tachycardia
- B. Dyspnea
- C. Vomiting
- D. Muscle cramps
Correct answer: C
Rationale: Vomiting is a common sign of digitalis toxicity and should be closely monitored. While tachycardia is a common sign of heart failure, it is not typically associated with digitalis toxicity (Choice A). Dyspnea (Choice B) and muscle cramps (Choice D) are not specific signs of digitalis toxicity and can be present in other conditions. Therefore, the presence of vomiting should raise concerns about digitalis toxicity in the child with heart failure.
5. Two days after an abdominal hysterectomy, an elderly female with diabetes has a syncopal episode. The nurse determines that her vital signs are within normal limits, but her blood sugar is 325 mg/dL or 18.04 mmol/L (SI). What intervention should the nurse implement first?
- A. Administer regular insulin per sliding scale
- B. Cancel the client's dinner tray
- C. Give the client 4 ounces (120 mL) of orange juice
- D. Administer the next scheduled dose of metformin
Correct answer: A
Rationale: In this case, the nurse should implement the intervention of administering regular insulin per sliding scale. High blood sugar levels, as indicated by a reading of 325 mg/dL, require insulin administration to prevent complications such as hyperglycemia. Canceling the client's dinner tray (choice B) would not address the immediate need to lower the blood sugar level. Giving the client orange juice (choice C) might further increase the blood sugar level as it contains sugar. Administering the next scheduled dose of metformin (choice D) is not appropriate as metformin is not typically used for acute management of high blood sugar levels.
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