HESI LPN
HESI Fundamental Practice Exam
1. A client is to receive 10 mEq of KCl diluted in 250 ml of normal saline over 4 hours. At what rate should the LPN/LVN set the client's intravenous infusion pump?
- A. 13 ml/hour
- B. 63 ml/hour
- C. 80 ml/hour
- D. 125 ml/hour
Correct answer: B
Rationale: To calculate the correct rate of infusion, divide the total volume by the total time: 250 ml / 4 hours = 62.5 ml/hour, which is rounded up to 63 ml/hour. This rate ensures the proper administration of the KCl over the 4-hour period. Choice A (13 ml/hour) is incorrect as it does not match the calculated rate. Choices C (80 ml/hour) and D (125 ml/hour) are also incorrect as they do not correspond to the calculated rate needed for the specified time frame.
2. When explaining the fecal occult blood testing procedure to a client, which of the following information should be included?
- A. Eating more protein is not necessary before testing.
- B. Multiple stool specimens may be required for testing.
- C. A red color change indicates a positive test.
- D. The specimen must not be contaminated with urine.
Correct answer: D
Rationale: The correct answer is D. When performing fecal occult blood testing, it is crucial to inform the client that the specimen must not be contaminated with urine to prevent false results. Choices A and B are incorrect because eating more protein is not required before testing, and multiple stool specimens may be necessary for accurate results, respectively. Additionally, regarding choice C, a red color change, not blue, indicates a positive test result, making it an incorrect option.
3. A client with hypertension is prescribed a low-sodium diet. Which food should the LPN/LVN recommend the client avoid?
- A. Fresh fruits
- B. Grilled chicken
- C. Whole grain bread
- D. Canned soup
Correct answer: D
Rationale: The correct answer is D, canned soup. Canned soup is often high in sodium, which contradicts the low-sodium diet prescribed for hypertension. Fresh fruits (A) are generally low in sodium and are a healthy choice. Grilled chicken (B) is a lean protein option that is suitable for a low-sodium diet. Whole grain bread (C) is also a good choice as it is not typically high in sodium. Therefore, the LPN/LVN should recommend avoiding canned soup to adhere to the low-sodium dietary restrictions.
4. A client has a prescription for 5 units of regular insulin and 10 units of NPH insulin to mix together and administer subcutaneously. Determine the correct order of steps for this procedure.
- A. Inject 5 units of air into the bottle of regular insulin
- B. Withdraw the correct dose of NPH insulin from the bottle
- C. Inject 10 units of air into the bottle of NPH insulin
- D. Withdraw the correct dose of regular insulin from the bottle
Correct answer: B
Rationale: The correct order of steps for this procedure is to first inject air into the NPH insulin bottle to prevent vacuum formation. After injecting air into the NPH insulin, the next step is to withdraw the correct dose of regular insulin from its bottle. This sequence ensures that the regular insulin is drawn after the NPH insulin, preventing contamination and ensuring accurate dosing. Therefore, choice B is correct. Choices A, C, and D are incorrect because air should be injected into the NPH insulin first, not the regular insulin, and the doses should be withdrawn in the appropriate order to maintain the integrity and potency of each insulin type.
5. A nurse receives a report about a client receiving IV fluids infusing at 125 mL/hr but notes they have only received 80 mL over the last 2 hours. What should the nurse do first?
- A. Check IV tubing for obstruction
- B. Increase the flow rate
- C. Change the IV site
- D. Notify the physician
Correct answer: A
Rationale: The correct first action for the nurse to take is to check the IV tubing for obstruction. This step is crucial in ensuring that the IV fluids are flowing properly and that there are no blockages preventing the correct infusion rate. Increasing the flow rate (Choice B) without confirming the tubing's status could lead to potential complications if there is indeed an obstruction. Changing the IV site (Choice C) is not the priority in this situation unless there are specific clinical indications. Notifying the physician (Choice D) can be done after checking the tubing for obstruction, as the physician may need to be informed depending on the findings.
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