HESI LPN
CAT Exam Practice
1. A 60-year-old male with type 2 diabetes mellitus tells the nurse that he is going to join a gym and start working out. Which information is most important for the nurse to obtain?
- A. Recent serum cholesterol levels
- B. Presence of calf pain during exercise
- C. Average weight gain or loss in the last year
- D. Exercise tolerance test with EKG results
Correct answer: B
Rationale: The most important information for the nurse to obtain in this scenario is the presence of calf pain during exercise. Calf pain during exercise could indicate peripheral vascular issues, such as peripheral artery disease, which is crucial to address before starting an exercise program. High cholesterol levels (choice A) may be important but are not as immediately relevant as assessing for peripheral vascular issues. Average weight gain or loss (choice C) may provide some insight into the patient's overall health status but is not as critical as assessing for potential vascular complications. An exercise tolerance test with EKG results (choice D) may be valuable in assessing cardiovascular fitness but is not as crucial as evaluating for peripheral vascular issues given the patient's symptoms.
2. Two days after an abdominal hysterectomy, an elderly female with diabetes has a syncopal episode. The nurse determines that her vital signs are within normal limits, but her blood sugar is 325 mg/dL or 18.04 mmol/L (SI). What intervention should the nurse implement first?
- A. Administer regular insulin per sliding scale
- B. Cancel the client's dinner tray
- C. Give the client 4 ounces (120 mL) of orange juice
- D. Administer the next scheduled dose of metformin
Correct answer: A
Rationale: In this case, the nurse should implement the intervention of administering regular insulin per sliding scale. High blood sugar levels, as indicated by a reading of 325 mg/dL, require insulin administration to prevent complications such as hyperglycemia. Canceling the client's dinner tray (choice B) would not address the immediate need to lower the blood sugar level. Giving the client orange juice (choice C) might further increase the blood sugar level as it contains sugar. Administering the next scheduled dose of metformin (choice D) is not appropriate as metformin is not typically used for acute management of high blood sugar levels.
3. An IV antibiotic is prescribed for a client with a postoperative infection. The medication is to be administered in 4 divided doses. What schedule is best for administering this prescription?
- A. 1000, 1600, 2200, 0400
- B. Give in equally divided doses during waking hours
- C. Administer with meals and a bedtime snack
- D. 0800, 1200, 1600, 2000
Correct answer: D
Rationale: The best schedule for administering the IV antibiotic in 4 divided doses is 0800, 1200, 1600, and 2000. This timing allows for equal spacing between doses, ensuring consistent therapeutic levels of the medication in the client's system. Choice A provides doses too close together, increasing the risk of medication errors and potential toxicity. Choice B's suggestion of giving doses during waking hours is vague and lacks specific timing, which may result in irregular dosing intervals. Choice C, administering with meals and a bedtime snack, is unrelated to the timing of the antibiotic doses and does not optimize the drug's effectiveness.
4. A client is receiving lidocaine IV at 3 mg/minute. The pharmacy dispenses a 500 ml IV solution of normal saline (NS) with 2 grams of lidocaine. The nurse should regulate the infusion pump to deliver how many ml/hour?
- A. 18
- B. 27
- C. 36
- D. 45
Correct answer: D
Rationale: The infusion rate is calculated based on the concentration of lidocaine and the prescribed rate of infusion. First, convert lidocaine's weight to milligrams (2 grams = 2000 mg). Then, use the formula: (Total volume in ml * dose in mg) / 60 minutes. For this case, (500 ml * 2000 mg) / 60 minutes = 45 ml/hour. Therefore, the correct answer is D. Choices A, B, and C are incorrect as they do not reflect the accurate calculation based on the provided concentration and infusion rate.
5. A client with multiple sclerosis is experiencing scotomas (blind spots), which are limiting peripheral vision. What intervention should the nurse include in this client's plan of care?
- A. Encourage the use of corrective lenses during the day
- B. Practice visual exercises that focus on a still object
- C. Alternate an eye patch from eye every 2 hours
- D. Teach techniques for scanning the environment
Correct answer: D
Rationale: The correct intervention for a client with multiple sclerosis experiencing scotomas and limited peripheral vision is to teach techniques for scanning the environment. This intervention helps the client compensate for vision loss by learning how to scan and explore their surroundings effectively. Encouraging the use of corrective lenses may not address the issue of scotomas, and visual exercises focusing on a still object may not enhance peripheral vision. Alternating an eye patch every 2 hours is not typically indicated for scotomas in multiple sclerosis, making it an incorrect choice.
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