HESI LPN
CAT Exam Practice
1. A 13-year-old girl, diagnosed with diabetes mellitus Type 1 at the age of 9, is admitted to the hospital in diabetic ketoacidosis. Which occurrence is the most likely cause of the ketoacidosis?
- A. Ate an extra peanut butter sandwich before gym class
- B. Incorrectly drew up and administered too much insulin
- C. Was not hungry, so she skipped eating lunch
- D. Has had a cold and ear infection for the past two days
Correct answer: B
Rationale: The correct answer is B. Incorrect insulin administration is a common cause of diabetic ketoacidosis. Administering too much insulin can lead to uncontrolled hyperglycemia, where the body starts breaking down fat for energy, resulting in the production of ketones. Choices A, C, and D are less likely to directly cause diabetic ketoacidosis. Eating an extra peanut butter sandwich, skipping lunch, or having a cold and ear infection would not directly lead to the metabolic derangements seen in diabetic ketoacidosis.
2. A client prescribed warfarin is being taught about dietary modifications by a nurse. Which statement by the client indicates understanding of the teaching?
- A. ''I need to avoid foods high in vitamin C.''
- B. ''I should eat a consistent amount of vitamin K each day.''
- C. ''I can eat as many leafy greens as I want.''
- D. ''I should not worry about any changes in my diet.''
Correct answer: B
Rationale: The correct answer is B. Consistency in vitamin K intake is crucial for clients on warfarin to maintain stable anticoagulation levels. Option A is incorrect as vitamin C does not directly interact with warfarin. Option C is incorrect because although leafy greens are high in vitamin K, excessive consumption can affect warfarin's effectiveness. Option D is incorrect as any changes in diet, particularly in vitamin K intake, can impact the efficacy of warfarin.
3. A client is admitted for an exacerbation of heart failure (HF) and is being treated with diuretics for fluid volume excess. In planning nursing care, which interventions should the nurse include? (Select all that apply)
- A. Encourage oral fluid intake of 3,000 ml/day
- B. Observe for evidence of hypokalemia
- C. Teach the client how to restrict dietary sodium
- D. Monitor PTT, PT, and INR lab values
Correct answer: B
Rationale: The correct interventions to include when a client with heart failure is being treated with diuretics for fluid volume excess are to observe for evidence of hypokalemia. Diuretics can lead to potassium loss, resulting in hypokalemia. Monitoring for this electrolyte imbalance is crucial. Encouraging oral fluid intake of 3,000 ml/day may exacerbate fluid volume excess in a client with heart failure. Teaching the client how to restrict dietary sodium is important in managing heart failure, but it is not directly related to the use of diuretics for fluid volume excess. Monitoring PTT, PT, and INR lab values is not typically associated with diuretic therapy for heart failure but rather with anticoagulant therapy.
4. A client with a large pleural effusion undergoes a thoracentesis. Following the procedure, which assessment finding warrants immediate intervention by the nurse?
- A. The client has asymmetrical chest wall expansion
- B. The client complains of pain at the insertion site
- C. The client's chest x-ray indicates decreased pleural effusion
- D. The client's arterial blood gases show pH 7.35, PaO2 85, PaCO2 35, HCO3 26
Correct answer: A
Rationale: Asymmetrical chest wall expansion is a critical finding post-thoracentesis as it may suggest a pneumothorax, requiring immediate intervention to prevent further complications. The other options, such as pain at the insertion site (Choice B), decreased pleural effusion on chest x-ray (Choice C), and normal arterial blood gases within acceptable ranges (Choice D) do not indicate an immediate need for intervention like asymmetrical chest wall expansion does.
5. A male client with hypertension, who received new antihypertensive prescriptions at his last visit, returns to the clinic two weeks later to evaluate his blood pressure (BP). His BP is 158/106, and he admits that he has not been taking the prescribed medication because the drugs make him 'feel bad.' In explaining the need for hypertension control, the nurse should stress that an elevated BP places the client at risk for which pathophysiological condition?
- A. Feed the client a snack
- B. Empty the urinary drainage bag
- C. Offer the client oral fluids
- D. Stroke secondary to hemorrhage
Correct answer: D
Rationale: Elevated blood pressure, if left uncontrolled, significantly increases the risk of stroke secondary to hemorrhage and other cardiovascular events. This condition can lead to serious complications due to the increased pressure on the blood vessels in the brain. Choices A, B, and C are unrelated to the potential pathophysiological consequences of uncontrolled hypertension and are not the primary concern in this scenario.
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