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

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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 young adult female presents at the emergency center with acute lower abdominal pain. Which assessment finding is most important for the nurse to report to the healthcare provider?

Correct answer: B

Rationale: The correct answer is B. A missed menstrual period could indicate a possible pregnancy-related issue, requiring urgent evaluation. Assessing the menstrual history in a female of reproductive age takes precedence in this scenario. Choice A, the pain scale rating, is important but not as urgent as evaluating the menstrual history. Choice C, reporting white curdy vaginal discharge, may suggest a vaginal infection but is not as critical as ruling out a potential pregnancy. Choice D, the history of irritable bowel syndrome, is relevant but not as crucial as determining pregnancy-related issues in this context.

3. A 9-year-old received a short arm cast for a right radius. To relieve itching under the child’s cast, which instructions should the nurse provide to the parents?

Correct answer: A

Rationale: Blowing cool air from a hair dryer under the cast is a safe method to relieve itching without damaging the cast or causing injury. The air helps to dry out the moisture that is causing the itching. Twisting the cast back and forth (choice B) can create pressure points and discomfort for the child. Shaking powder into the cast (choice C) can introduce foreign material that may cause skin irritation. Pushing a pencil under the cast edge (choice D) can injure the child's skin or even dislodge the cast.

4. A client with deep vein thrombosis (DVT) in the left leg is on a heparin protocol. Which intervention is most important for the nurse to include in this client's plan of care?

Correct answer: A

Rationale: The correct answer is to 'Observe for bleeding side effects related to heparin therapy.' This is the most crucial intervention for a client with deep vein thrombosis (DVT) on a heparin protocol. Heparin, being an anticoagulant, increases the risk of bleeding as a side effect. Therefore, close monitoring for signs of bleeding, such as bruising, petechiae, or blood in stool or urine, is essential to prevent severe complications. While assessing blood pressure and heart rate (Choice B) is important, it is not as critical as monitoring for bleeding. Measuring calf girth (Choice C) may help evaluate edema but is not as vital as observing for bleeding complications. Encouraging mobilization (Choice D) is beneficial for preventing complications like pulmonary embolism, but in this scenario, monitoring for bleeding takes precedence due to the immediate risk associated with anticoagulant therapy.

5. While eating at a restaurant, a gravid woman begins to choke and is unable to speak. What action should the nurse who witnesses the event take?

Correct answer: C

Rationale: The correct action for the nurse to take when a pregnant woman is choking and unable to speak is to perform the Heimlich maneuver using subdiaphragmatic thrusts. This technique is recommended for a pregnant woman to prevent harm to the fetus. Option A, cardiopulmonary resuscitation with uterine tilt, is not indicated for a choking episode. Option B, the Heimlich maneuver using chest thrusts, can potentially harm the gravid uterus. Option D, calling 911 immediately before providing assistance, can lead to a delay in addressing the immediate choking emergency.

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