HESI LPN
CAT Exam Practice
1. Which action should the nurse include in the plan of care for a client receiving acyclovir (Zovirax) IV for treatment of herpes zoster (shingles)?
- A. Initiate cardiac telemetry monitoring
- B. Maintain continuous pulse oximetry
- C. Perform capillary glucose measurements
- D. Monitor serum creatinine levels
Correct answer: D
Rationale: The correct answer is D: Monitor serum creatinine levels. Acyclovir can lead to nephrotoxicity, making it essential to monitor kidney function through serum creatinine levels. While cardiac telemetry monitoring (choice A) and maintaining continuous pulse oximetry (choice B) are important in certain conditions, they are not directly related to acyclovir therapy for herpes zoster. Performing capillary glucose measurements (choice C) is not a priority when administering acyclovir for herpes zoster. Monitoring serum creatinine levels is crucial to detect any potential renal issues early, as the drug's nephrotoxic potential requires close monitoring of kidney function.
2. 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.
3. While flushing the proximal port of a triple lumen central venous catheter with heparin solution, the nurse meets resistance. What action should the nurse take?
- A. Remove the cap and apply direct gentle pressure with the syringe
- B. Contact the healthcare provider regarding the need for a chest x-ray
- C. Cover the cap with tape and label the port as being obstructed
- D. Remove the catheter while applying gentle pressure at the insertion site
Correct answer: B
Rationale: When encountering resistance while flushing a central venous catheter, it is crucial to contact the healthcare provider regarding the need for a chest x-ray. This resistance may indicate a blockage within the catheter, a kink, or other issues that could compromise the integrity of the catheter or pose a risk to the patient. It is essential to assess the situation through imaging to determine the appropriate course of action. Option A is incorrect because applying direct pressure could cause damage to the catheter or dislodge any potential blockage. Option C is incorrect as labeling the port as obstructed without further assessment may delay necessary interventions. Option D is incorrect as removing the catheter without proper evaluation can lead to complications and should only be done under the guidance of a healthcare provider.
4. A client in the intensive care unit is being mechanically ventilated, has an indwelling urinary catheter in place, and is exhibiting signs of restlessness. Which action should the nurse take first?
- A. Review the heart rhythm on cardiac monitors
- B. Check urinary catheter for obstruction
- C. Auscultate bilateral breath sounds
- D. Give PRN dose of lorazepam (Ativan)
Correct answer: B
Rationale: When a client in the intensive care unit is mechanically ventilated, has an indwelling urinary catheter, and is restless, the priority action is to check the urinary catheter for obstruction. Restlessness in this context could be due to a blocked catheter causing discomfort or urinary retention, which needs immediate attention to prevent complications. Reviewing the heart rhythm on cardiac monitors can be important but is not the priority in this scenario. Auscultating bilateral breath sounds is also important in a ventilated client but addressing the potential immediate issue of a blocked catheter takes precedence. Giving a PRN dose of lorazepam should not be the first action without addressing the underlying cause of restlessness.
5. The client had gastric bypass surgery yesterday. Which intervention is most important for the nurse to implement during the first 24 postoperative hours?
- A. Insert an indwelling urinary catheter
- B. Monitor for the appearance of an incisional hernia
- C. Instruct the client to eat small frequent meals
- D. Measure hourly urinary output
Correct answer: D
Rationale: Monitoring hourly urinary output is crucial during the first 24 postoperative hours to assess kidney function, fluid balance, and early detection of complications like dehydration or inadequate kidney perfusion. Inserting an indwelling urinary catheter is not routinely necessary after gastric bypass surgery unless there are specific indications. Monitoring for an incisional hernia is important but not the highest priority in the immediate postoperative period. Instructing the client to eat small frequent meals is essential for long-term dietary management after gastric bypass surgery, but not the most critical intervention during the initial 24 hours.
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