HESI LPN
HESI Practice Test for Fundamentals
1. A healthcare provider is caring for several clients who are receiving oxygen therapy. Which client should the provider assess most frequently for manifestations of oxygen toxicity?
- A. 100% oxygen via partial rebreathing mask
- B. 2 liters per minute via nasal cannula
- C. 4 liters per minute via simple mask
- D. 6 liters per minute via face mask
Correct answer: A
Rationale: When a client is receiving 100% oxygen via a partial rebreathing mask, there is a higher risk for oxygen toxicity due to the higher concentration of oxygen delivered. This client should be assessed most frequently for manifestations of oxygen toxicity. Choices B, C, and D are less likely to result in oxygen toxicity compared to 100% oxygen delivery via a partial rebreathing mask.
2. A nurse is preparing to administer methylprednisolone 10 mg by IV bolus. The amount available is methylprednisolone injection 40-mg/mL. How many mL should the nurse administer? (Round the answer to the nearest tenth. Do not use a trailing zero.)
- A. 0.3 mL
- B. 0.25 mL
- C. 0.4 mL
- D. 0.5 mL
Correct answer: A
Rationale: To calculate the mL to administer, use the formula: Dose required (mg) ÷ Stock concentration (mg/mL) = Volume to administer (mL). In this case, 10 mg ÷ 40 mg/mL = 0.25 mL. However, when rounding to the nearest tenth, the answer should be 0.3 mL. Therefore, the nurse should administer 0.3 mL. Choice A is the correct answer. Choice B (0.25 mL) is the result obtained before rounding. Choice C (0.4 mL) and Choice D (0.5 mL) are incorrect calculations.
3. A healthcare professional is preparing to administer gentamicin 2 mg/kg via IV bolus to a client who weighs 220 lb. How many mg should the healthcare professional administer?
- A. 200 mg
- B. 100 mg
- C. 160 mg
- D. 180 mg
Correct answer: C
Rationale: To calculate the dosage correctly, the weight in pounds must first be converted to kilograms. 220 lb / 2.2 = 100 kg. Then, multiply the weight in kg by the dosage of 2 mg/kg: 2 mg/kg × 100 kg = 200 mg. Therefore, the correct dosage to administer is 200 mg, which is closest to option A. Option C (160 mg) is incorrect because it does not match the calculated dosage. Options B (100 mg) and D (180 mg) are also incorrect as they do not align with the correct calculation.
4. A client needs to maintain a positive nitrogen balance for wound healing. Which of the following food items should the nurse recommend as a good source of complete protein?
- A. Cheddar cheese
- B. White rice
- C. Apples
- D. Green beans
Correct answer: A
Rationale: Cheddar cheese is the correct answer as it is a good source of complete protein that contains all essential amino acids required for maintaining a positive nitrogen balance for wound healing. Complete proteins provide all essential amino acids needed by the body. White rice, apples, and green beans do not offer complete proteins like cheddar cheese, making them inadequate choices for this purpose.
5. A client has a prescription for a 24-hour urine collection. Which of the following actions should the nurse take?
- A. Discard the first voiding.
- B. Keep the urine in a single container on ice.
- C. Include the last voiding in the collection.
- D. Instruct the client to urinate into the toilet, stop midstream, and finish urinating into the specimen container.
Correct answer: A
Rationale: The correct action for the nurse to take when a client has a prescription for a 24-hour urine collection is to discard the first voiding. This initial voiding is typically not collected to allow for the accurate start of the 24-hour collection period. All subsequent urine voided within the specified time frame is then collected. Including the last voiding in the collection is important to ensure that the full 24-hour period is covered. It is essential to keep the urine cool by storing it in a single container on ice to prevent degradation of components. Instructing the client to stop midstream and finish urinating into the specimen container is not required for a 24-hour urine collection and is an unnecessary step.
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