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. In a client in her third trimester of pregnancy, an S3 heart sound is auscultated. What intervention should the nurse take?

Correct answer: D

Rationale: An S3 heart sound can be a normal finding in pregnancy due to increased blood volume and flow. In this scenario, there is no immediate need for further interventions. Documenting this finding in the client's record is essential for tracking the client's health status and ensuring proper follow-up if needed. Notifying the healthcare provider, limiting fluids, or preparing for an echocardiogram is unnecessary as it is likely a physiological finding in pregnancy. These interventions should only be considered if other symptoms suggestive of a cardiac issue are present.

3. A female client with breast cancer who completed her first chemotherapy treatment today at an outpatient center is preparing for discharge. Which behavior indicates that the client understands her care needs?

Correct answer: D

Rationale: The correct answer is D because reporting any new or worsening symptoms to the nurse is crucial for the early detection of potential complications. This behavior shows that the client understands the importance of monitoring her health status post-chemotherapy treatment. Choices A, B, and C are incorrect because while renting movies, borrowing books, discussing dietary restrictions, and arranging follow-up appointments are all important aspects of care, the most critical factor immediately after chemotherapy is to monitor and report any new or worsening symptoms to healthcare providers.

4. While changing a client’s chest tube dressing, the nurse notes a crackling sensation when gentle pressure is applied to the skin at the insertion site. What is the best action for the nurse to take?

Correct answer: A

Rationale: A crackling sensation indicates subcutaneous emphysema, caused by air trapped under the skin. Applying a pressure dressing around the chest tube insertion site can help manage the issue by preventing further air leakage into the tissues. Choice B is incorrect because the crackling sensation is not related to allergies. Choice C is incorrect as measuring the area does not address the underlying cause. Choice D is incorrect as administering an oral antihistamine is not indicated for subcutaneous emphysema.

5. The nurse is measuring the output of an infant admitted for vomiting and diarrhea. During a 12-hour shift, the infant drinks 4 ounces of Pedialyte, vomits 25 ml, and voids twice. The dry diaper weighs 105 grams. Which computer documentation should the nurse enter in the infant’s record?

Correct answer: C

Rationale: The correct answer is to document on the flow sheet that the infant voided twice and vomited 25 ml. This choice accurately reflects the need for accurate documentation of intake and output, essential for monitoring the infant's hydration status. Choice A is incorrect because the oral intake should not be calculated by subtracting vomitus from the oral intake. Choice B is incorrect because it does not address the specific documentation related to the infant's output. Choice D is incorrect as it focuses on calculating urine output based on diaper weight, which is not the primary concern in this scenario.

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