a heparin infusion is prescribed for a client who weighs 220 pounds after administering a bolus dose of 80 unitskg the nurse calculates the infusion r
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Nursing Elites

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?

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. A woman with an anxiety disorder calls her obstetrician’s office and tells the nurse of increased anxiety since the normal vaginal delivery of her son three weeks ago. Since she is breastfeeding, she stopped taking her antianxiety medications, but thinks she may need to start taking them again because of her increased anxiety. What response is best for the nurse to provide this woman?

Correct answer: C

Rationale: The correct answer is C. Some antianxiety medications are considered safe for use while breastfeeding, and the nurse should provide this information to alleviate the woman's concerns. Choice A has been corrected to focus on the safety of certain antianxiety medications during breastfeeding, which is more accurate. Choice B suggests stress-relieving alternatives, which may help but do not address the need for antianxiety medication if required. Choice D is incorrect because it minimizes the woman's concerns by dismissing her increased anxiety as a normal response.

3. The nurse has explained safety precautions and infant care to a primigravida mother and observes the mother as she gives care to her newborn during the first two days of rooming-in. Which action indicates the mother understands the instruction?

Correct answer: D

Rationale: Positioning the infant supine in the crib to sleep is the correct action that indicates the mother understands the instruction. This position is recommended to reduce the risk of Sudden Infant Death Syndrome (SIDS). Choice A is incorrect as it is not a routine or recommended practice to aspirate the newborn’s nares using a syringe without a specific medical indication. Choice B is incorrect because applying a dressing to the cord after the newborn's bath is not a standard care practice. Choice C is incorrect because breastfeeding every hour during the night is excessive and not a recommended feeding schedule for a newborn.

4. When admitting a client diagnosed with active tuberculosis to isolation, which infection control measures should the nurse implement?

Correct answer: A

Rationale: The correct answer is A: Negative pressure environment. Tuberculosis is transmitted through airborne particles, so a negative pressure room is essential to prevent the spread of the bacteria. Choice B, contact precautions, are used for infections spread by direct or indirect contact, not for tuberculosis. Choice C, droplet precautions, are for infections transmitted through respiratory droplets, not airborne particles like tuberculosis. Choice D, protective environment, is used for protecting immunocompromised patients from outside pathogens, not for preventing the spread of tuberculosis.

5. A continuous infusion of nitroglycerin is prescribed for an adult male admitted with an acute myocardial infarction. The client is experiencing active chest pain that he describes as 8 out of 10. Which intervention is most important for the nurse to implement?

Correct answer: C

Rationale: Continuously monitoring blood pressure is crucial in this case because nitroglycerin can cause hypotension as a side effect. Monitoring blood pressure allows the nurse to assess the client's response to the medication and detect any signs of hypotension promptly. This intervention is essential to ensure the effectiveness of nitroglycerin therapy and prevent potential complications. Administering the infusion via an infusion pump is important for accurate dosing but not the most critical at this moment. Obtaining the current serum potassium level is important but not the most immediate concern when the client is experiencing active chest pain. Teaching guided imagery may be beneficial for pain management, but in this scenario, monitoring blood pressure takes precedence due to the potential side effects of nitroglycerin.

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