HESI LPN
CAT Exam Practice Test
1. A heparin infusion is prescribed for a client who weighs 220 pounds. After administering a bolus dose of 80 units/kg, the nurse calculates the infusion rate for the heparin sodium at 18 units/kg/hour. The available solution is Heparin Sodium 25,000 units in 5% Dextrose Injection 250 ml. The nurse should program the infusion pump to deliver how many ml/hour?
- A. 18
- B. 27
- C. 36
- D. 45
Correct answer: B
Rationale: To calculate the infusion rate, first, find the total dose required per hour, which is the patient's weight (220 pounds) multiplied by the prescribed rate (18 units/kg/hour). This equals 3960 units/hour. Next, determine how many ml of the solution contain 25,000 units; this is 250 ml. Divide the total dose required per hour (3960 units) by the units per ml (25,000 units/250 ml) to find how many ml are needed per hour. This results in 27 ml/hour. Therefore, the nurse should program the infusion pump to deliver 27 ml/hour. Choice A (18) is incorrect as it does not account for the concentration of the heparin solution. Choices C (36) and D (45) are incorrect as they do not reflect the accurate calculations based on the patient's weight and the heparin concentration in the solution.
2. A client who is scheduled to have surgery in two hours tells the nurse, 'My doctor was here and used a lot of big words about the surgery, then asked me to sign a paper.' What action should the nurse take?
- A. Reassure the client that pre-surgery anxiety is a normal experience
- B. Explain the surgery in clear terms that the client can understand
- C. Call the surgeon back to clarify the information with the client
- D. Redirect the client’s thoughts by teaching relaxation techniques
Correct answer: B
Rationale: The correct action for the nurse to take in this situation is to explain the surgery to the client in clear terms that they can understand. This will help alleviate the client's anxiety and ensure they are well-informed about the procedure they are about to undergo. Choice A is incorrect because while reassurance is important, it does not address the client's specific concern about understanding the surgery. Choice C is not the initial step; the nurse should first attempt to clarify the information themselves. Choice D is not the priority when the client is seeking clarification about the surgery.
3. While assessing a client four hours post-thoracentesis, the nurse is unable to auscultate breath sounds on the right side of the chest. What action should the nurse take first?
- A. Instruct the client to perform cough and deep breathing exercises
- B. Assess the client’s vital signs and respiratory effort
- C. Administer oxygen via nasal cannula according to the PNR protocol
- D. Document assessment findings in the client’s medical record
Correct answer: B
Rationale: The correct first action for the nurse to take in this situation is to assess the client’s vital signs and respiratory effort. It is crucial to promptly detect any immediate complications or changes in the client's condition. Instructing cough and deep breathing exercises (choice A) can be considered after further assessment. Administering oxygen (choice C) should be based on assessment findings and healthcare provider's orders. While documenting the findings (choice D) is essential, it should not be the first action when a potential issue with breath sounds is detected.
4. The healthcare provider is evaluating a client for potential dehydration. Which assessment finding is most indicative of fluid volume deficit?
- A. Moist mucous membranes
- B. Increased urine output
- C. Decreased skin turgor
- D. Elevated blood pressure
Correct answer: C
Rationale: Corrected Rationale: Decreased skin turgor is a classic sign of dehydration. When someone is dehydrated, the skin loses its elasticity and becomes less turgid. This change is easily assessed by gently pinching and pulling up the skin on the back of the hand or forearm. If the skin remains elevated or tents rather than quickly returning to its normal position, it indicates dehydration. Moist mucous membranes (Choice A) are actually a sign of adequate hydration. Increased urine output (Choice B) can be a sign of dehydration, but decreased skin turgor is a more specific indicator. Elevated blood pressure (Choice D) is not typically associated with fluid volume deficit and may indicate other health issues.
5. Prior to surgery, written consent must be obtained. What is the nurse’s legal responsibility with regard to obtaining written consent?
- A. Validate the client's understanding of the surgical procedure to be conducted
- B. Explain the surgical procedure to the client and ensure the client comprehends before signing the consent form
- C. Ensure the client, not a family member, signs the surgical consent form
- D. Confirm that the surgical consent form is signed and included in the client's record
Correct answer: A
Rationale: The nurse's legal responsibility in obtaining written consent is to validate the client's understanding of the surgical procedure to be conducted. This process ensures that the client has been comprehensively informed about the procedure, including its risks, benefits, and alternatives. Choice B is incorrect because it does not emphasize the validation of client understanding, which is crucial for informed consent. Choice C is incorrect as the client, not a family member, should provide consent unless specific circumstances dictate otherwise. Choice D is incorrect because although ensuring the consent form is signed and filed is important, it does not address the primary responsibility of confirming the client's comprehension and ensuring informed consent.
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