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. After a client with leukemia undergoes a bone marrow biopsy and is found to have thrombocytopenia, which nursing assessment is most important following the procedure?
- A. Observe the aspiration site
- B. Assess body temperature
- C. Monitor skin elasticity
- D. Measure urinary output
Correct answer: A
Rationale: The correct answer is to observe the aspiration site. Thrombocytopenia, characterized by a low platelet count, increases the risk of bleeding. Therefore, monitoring the biopsy site for bleeding or hematoma is crucial to ensure early detection and intervention. Assessing body temperature (choice B) is not directly related to the increased bleeding risk associated with thrombocytopenia. Monitoring skin elasticity (choice C) and measuring urinary output (choice D) are important assessments but are not the priority in this situation where bleeding risk needs immediate attention.
3. What should be the school nurse's first action after being notified that Child A has bitten Child B on the arm, resulting in broken skin but no bleeding?
- A. Apply antibiotic cream to Child B’s arm immediately
- B. Determine if Child A has a history of Hepatitis C or HIV
- C. Determine the date of Child B’s latest tetanus booster
- D. Wash Child B’s arm thoroughly with soap and water
Correct answer: D
Rationale: The correct first action for the school nurse to take in this situation is to wash Child B’s arm thoroughly with soap and water. Washing the wound immediately is crucial to reduce the risk of infection from the bite. Applying antibiotic cream may come after cleaning the wound. Determining Child A's medical history or checking Child B's tetanus status is important but not the immediate priority when dealing with a bite wound.
4. The unlicensed assistive personnel (UAP) has applied a gown and gloves and secured the tops of the gloves over the gown sleeves. What action should the nurse take?
- A. Confirm that the gown is tied securely at the neck and waist
- B. Remind the UAP to wash hands frequently while in the room
- C. Assist the UAP with application of the face mask or face shield
- D. Help the UAP reposition the gown sleeve over the gloves edges
Correct answer: D
Rationale: Proper application of personal protective equipment (PPE) is crucial to maintain infection control. In this scenario, the nurse should help the UAP reposition the gown sleeve over the gloves' edges. This action ensures that the gown properly covers the gloves, reducing the risk of contamination. Choices A, B, and C are incorrect because the primary concern is to address the improper application of PPE by repositioning the gown sleeves over the gloves, not checking other aspects of PPE or reminding about hand hygiene.
5. The nurse assesses a 5-year-old child who has been experiencing frequent headaches and vomiting. The nurse notices that the child is lethargic and has a positive Brudzinski sign. Which action should the nurse implement first?
- A. Perform a complete neurological examination
- B. Measure the child’s head circumference
- C. Check the child’s blood glucose level
- D. Notify the healthcare provider immediately
Correct answer: D
Rationale: The correct action for the nurse to implement first is to notify the healthcare provider immediately. The presence of lethargy and a positive Brudzinski sign in a child experiencing frequent headaches and vomiting may indicate a serious condition like meningitis. Prompt notification of the healthcare provider is crucial for timely evaluation and initiation of appropriate treatment. Choice A is incorrect because while a neurological examination may be necessary, it is not the priority when a potentially serious condition like meningitis is suspected. Choice B is incorrect as measuring the child's head circumference is not the most immediate action to take in this situation. Choice C is also incorrect as checking the child's blood glucose level, although important in some cases, is not the priority when a child presents with symptoms suggestive of meningitis.
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