HESI LPN
CAT Exam Practice
1. A client with a BMI of 60.2 kg/m² is admitted to the intensive care unit 3 weeks after gastric bypass with gastric rupture and impending multiple organ dysfunction syndrome (MODS). What should the nurse prepare to implement first?
- A. Mechanical ventilation
- B. Platelet transfusion
- C. Loop diuretic therapy
- D. Cyanocobalamin administration
Correct answer: A
Rationale: In this critical situation with gastric rupture and impending MODS, the priority intervention should be mechanical ventilation. This client is at risk of respiratory compromise due to the severity of the condition. Platelet transfusion (Choice B) is not the priority as there is no indication of significant bleeding. Loop diuretic therapy (Choice C) and cyanocobalamin administration (Choice D) are not the immediate priorities in this scenario and would not address the urgent need for respiratory support.
2. The nurse working on a mental health unit is prioritizing nursing care activities due to a staffing shortage. One practical nurse (PN) is on the unit with the nurse, and another RN is expected to arrive within two hours. Clients need to be awakened, and morning medications need to be prepared. Which plan is best for the nurse to implement?
- A. Wake all the clients and instruct them to go to the dining area for medication administration
- B. Explain to the clients that it will be necessary to cooperate until another RN arrives
- C. Ask the PN to administer medications as clients are awakened so both nurses are available
- D. Allow the clients to sleep until a third staff person can assist with unit activities
Correct answer: C
Rationale: The best plan for the nurse to implement is to ask the PN to administer medications as clients are awakened. This approach ensures that medication administration and client care are efficiently managed despite the staffing shortage. Option A is incorrect as it may disrupt the workflow and create unnecessary chaos. Option B is not the best choice as it does not address the immediate need for medication administration. Option D is not ideal as it delays client care until additional staff arrive, potentially compromising patient safety and timely medication administration.
3. A 2-year-old boy with short bowel syndrome has progressed to receiving enteral feedings only. Today his stools are occurring more frequently and have a more liquid consistency. His temperature is 102.2 °F, and he has vomited twice in the past four hours. Which assessment finding indicates that the child is becoming dehydrated?
- A. Occult blood in the stool
- B. Abdominal distention
- C. Elevated urine specific gravity
- D. Hyperactive bowel sounds
Correct answer: C
Rationale: Elevated urine specific gravity indicates concentrated urine, a sign of dehydration. In this scenario, the child is showing signs of dehydration with increased stool frequency, liquid consistency, fever, and vomiting. Occult blood in the stool may indicate gastrointestinal bleeding but is not a specific sign of dehydration. Abdominal distention can be seen in various conditions and is not a specific indicator of dehydration. Hyperactive bowel sounds can be present in various gastrointestinal conditions but are not directly related to dehydration.
4. The healthcare provider prescribes potassium chloride 25 mEq in 500 ml D5W to infuse over 6 hours. The available 20 ml vial of potassium chloride is labeled '10 mEq/5 ml.' How many ml of potassium chloride should the nurse add to the IV fluid?
- A. 12.5
- B. 5
- C. 10
- D. 20
Correct answer: B
Rationale: To prepare 25 mEq of potassium chloride for the infusion, the nurse should add 5 ml of the 10 mEq/5 ml solution. This concentration provides the required amount of potassium chloride without exceeding the needed volume. Choice A would result in 12.5 mEq, which exceeds the prescribed amount. Choices C and D are incorrect as they do not align with the correct calculation based on the vial concentration.
5. The nurse should explain to a client with lung cancer that pleurodesis is performed to achieve which expected outcome?
- A. Debulk tumor to maintain patency of air passages
- B. Relieve empyema after pneumonectomy
- C. Prevent the formation of effusion fluid
- D. Remove fluid from the intrapleural space
Correct answer: C
Rationale: The correct answer is C. Pleurodesis is a procedure used to prevent the re-accumulation of pleural effusion by creating adhesion between the pleurae. This helps prevent the formation of effusion fluid. Choices A, B, and D are incorrect because pleurodesis is not performed to debulk tumors, relieve empyema after pneumonectomy, or remove fluid from the intrapleural space. Understanding the purpose of pleurodesis is essential in providing accurate patient education and care.
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