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 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. After removing an IV that became infiltrated in the client’s left forearm, which site should the nurse select as a possible site to insert another IV catheter?

Correct answer: A

Rationale: The correct answer is A: Right hand. When an IV becomes infiltrated in the client's left forearm, it is essential to avoid the same side due to the risk of complications. Therefore, the right hand is a suitable alternative site for IV insertion. Choices B, C, and D are incorrect. Choosing the right forearm (B) would still be on the same side, which increases the risk of complications. The left hand (C) is not a preferred option immediately after an infiltration in the left forearm. The right subclavian (D) is an invasive site typically reserved for central line placement and not a first-line choice for IV insertion.

4. A client is admitted with severe dehydration. What is the most important assessment finding for the nurse to monitor?

Correct answer: A

Rationale: Changes in mental status are crucial to monitor in a client with severe dehydration. Altered mental status, such as confusion or lethargy, can indicate severe dehydration and potential complications like electrolyte imbalances affecting the brain. Monitoring urine output and color (choice B) is essential but may not provide immediate signs of severe dehydration. While monitoring blood pressure and heart rate (choice C) is important, changes in mental status take precedence as they can indicate more critical conditions. Skin turgor (choice D) is a valuable assessment for dehydration, but changes in mental status take priority due to their direct correlation with severe dehydration.

5. While assessing a client four hours post-thoracentesis, the nurse is unable to auscultate breath sounds on the right side of the chest. What action should the nurse take first?

Correct answer: B

Rationale: The correct first action for the nurse to take in this situation is to assess the client’s vital signs and respiratory effort. It is crucial to promptly detect any immediate complications or changes in the client's condition. Instructing cough and deep breathing exercises (choice A) can be considered after further assessment. Administering oxygen (choice C) should be based on assessment findings and healthcare provider's orders. While documenting the findings (choice D) is essential, it should not be the first action when a potential issue with breath sounds is detected.

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