HESI LPN
CAT Exam Practice
1. 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.
2. An older client comes to the clinic with a family member. When the nurse attempts to take the client’s health history, the client does not respond to questions clearly. What action should the nurse implement first?
- A. Assess the surroundings for noise and distractions
- B. Provide a printed health history form
- C. Defer the health history until the client is less anxious
- D. Ask the family member to answer the questions
Correct answer: A
Rationale: The correct action for the nurse to implement first is to assess the surroundings for noise and distractions. This step is crucial as environmental factors can affect the client's ability to respond clearly. By minimizing noise and distractions, the nurse can create a more conducive environment for effective communication. Providing a printed form (Choice B) may help but addressing environmental factors should come first. Deferring the health history (Choice C) or asking the family member to answer the questions (Choice D) should not be the initial steps, as they do not directly address the issue of unclear communication with the client.
3. The nurse is preparing to send a client to the cardiac catheterization lab for an angioplasty. Which client report is most important for the nurse to explore further prior to the start of the procedure?
- A. Verbalizes a fear of being in a confined space.
- B. Drank a glass of water in the past 2 hours.
- C. Reports left chest wall pain prior to admission.
- D. Experiences facial swelling after eating crab
Correct answer: C
Rationale: The correct answer is C. Left chest wall pain could indicate ongoing cardiac issues or instability, which needs to be assessed before proceeding with the procedure. This pain could be related to the heart and may suggest a potential risk during the angioplasty. Options A, B, and D do not directly relate to cardiac complications during the procedure, making them less urgent for immediate assessment. Fear of confined spaces, drinking water, and facial swelling after eating crab are not immediate risks to the client's safety in the context of a cardiac catheterization procedure.
4. When should the nurse conduct an Allen’s test?
- A. When obtaining pulmonary artery pressures
- B. To assess for the presence of a deep vein thrombus in the leg
- C. Just before arterial blood gases are drawn peripherally
- D. Prior to attempting a cardiac output calculation
Correct answer: C
Rationale: The correct time to conduct an Allen’s test is just before arterial blood gases are drawn peripherally. This test is performed to assess the adequacy of collateral circulation in the hand before obtaining arterial blood gases. Choice A is incorrect because an Allen’s test is not specifically done when obtaining pulmonary artery pressures. Choice B is incorrect because an Allen’s test is not used to assess deep vein thrombosis. Choice D is incorrect because an Allen’s test is not done specifically before attempting a cardiac output calculation.
5. The nurse enters the room of a client who is awaiting surgery for appendicitis. The unlicensed assistive personnel (UAP) has helped the client to a position of comfort with the right leg flexed and has applied a heating pad to the client’s abdomen to relieve the client’s pain. Which action should the nurse implement first?
- A. Remove the heating pad.
- B. Reposition the client’s right leg.
- C. Monitor for signs of inflammation.
- D. Assess the client’s pain level.
Correct answer: A
Rationale: The correct action for the nurse to implement first is to remove the heating pad. Heating pads should not be used for suspected appendicitis as they can mask symptoms and potentially worsen inflammation. Choice B is not the priority as the position of comfort chosen by the UAP may be appropriate. Monitoring for signs of inflammation (Choice C) is important but not the initial action to address the immediate issue of the heating pad. Assessing the client's pain level (Choice D) can be done after removing the heating pad to evaluate the effectiveness of pain relief measures.
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