HESI LPN
HESI Fundamentals Exam
1. A healthcare professional is planning to collect a liquid stool specimen from a client for ova and parasites. Inaccurate test results may result if the healthcare professional:
- A. Refrigerates the collected specimen
- B. Collects the specimen in a sterile container
- C. Delays the collection of the specimen
- D. Uses a non-contaminated collection container
Correct answer: A
Rationale: Refrigeration can kill the ova and parasites present in the stool specimen, leading to inaccurate test results. Storing the specimen in a cold environment can disrupt the integrity of the parasites and ova, affecting the accuracy of the test. Collecting the specimen in a sterile container (Choice B) is the correct procedure to prevent external contamination. Delaying the collection of the specimen (Choice C) may affect the freshness of the sample but does not directly impact the test results. Using a non-contaminated collection container (Choice D) is essential to maintain the sample's integrity but does not relate to the risk of killing ova and parasites through refrigeration.
2. A healthcare professional is preparing to administer 750 mL of 0.9% sodium chloride IV to infuse over 7 hours. The healthcare professional should set the pump to deliver how many mL/hr?
- A. 107 mL/hr
- B. 75 mL/hr
- C. 90 mL/hr
- D. 60 mL/hr
Correct answer: A
Rationale: To calculate the mL/hr rate for the infusion, divide the total volume (750 mL) by the total time (7 hours). 750 mL ÷ 7 hours = 107 mL/hr. This means that the pump should be set to deliver approximately 107 mL/hr. Choice B (75 mL/hr) is incorrect because it does not reflect the correct calculation. Choice C (90 mL/hr) is incorrect as it does not align with the accurate calculation. Choice D (60 mL/hr) is incorrect as it does not match the correct mL/hr rate obtained through the calculation.
3. A male Native American presents to the clinic with complaints of frequent abdominal cramping and nausea. He states that he has chronic constipation and had not had a bowel movement in five days, despite trying several home remedies. Which intervention is most important for the nurse to implement?
- A. Evaluate the stool samples for the presence of blood
- B. Assess for the presence of an impaction
- C. Determine which home remedies were used
- D. Obtain a list of prescribed medications
Correct answer: B
Rationale: Assessing for impaction is crucial as it is a common cause of constipation and abdominal discomfort. In this scenario, the patient's symptoms of chronic constipation and no bowel movement for five days despite trying home remedies indicate a potential impaction that needs to be assessed. Evaluating stool samples for blood, determining the home remedies used, or obtaining a list of prescribed medications, while potentially relevant, are not as urgent as assessing for impaction in this situation.
4. During an IV catheter insertion demonstration, which statement by a nurse indicates understanding of the procedure?
- A. “I will thread the needle into the vein at an angle of 10 to 30 degrees with the bevel up.â€
- B. “I will insert the needle into the client’s skin at an angle of 10 to 30 degrees with the bevel up.â€
- C. “I will apply pressure approximately 1.2 inches below the insertion site before removing the needle.â€
- D. “I will select a vein in the antecubital fossa for IV insertion based on its size and easily accessible location.â€
Correct answer: B
Rationale: The correct technique for IV catheter insertion involves inserting the needle at a 10 to 30-degree angle with the bevel up. This angle facilitates proper vein puncture, reduces the risk of complications, and minimizes trauma to the vein. Choice A is incorrect because threading the needle into the vein at an angle of 10 to 30 degrees with the bevel up is the correct technique, not threading it all the way into the vein. Choice C is incorrect because applying pressure 1.2 inches below the insertion site before removing the needle is not a standard step in IV catheter insertion. Choice D is incorrect because selecting the antecubital fossa vein solely based on its size and accessibility may not be the most appropriate criterion; vein selection should also consider factors like vein condition and patient comfort.
5. A client with a new colostomy is being taught how to irrigate the ostomy. The healthcare provider realizes that the client needs further teaching when the client:
- A. Positions the irrigating solution bag 30 inches below the stoma
- B. Uses an open system for irrigation
- C. Irrigates the colostomy twice a day
- D. Cleans the stoma with harsh chemicals
Correct answer: A
Rationale: The correct answer is A. Positioning the irrigating solution bag 30 inches below the stoma would cause discomfort and ineffective irrigation as the bag should be positioned at a lower level. Option B is incorrect because a closed system for irrigation is the preferred method for colostomy irrigation. Option C is incorrect as colostomy irrigation is typically done once a day unless otherwise instructed by a healthcare provider. Option D is incorrect as the stoma should be cleaned with mild soap and water to prevent skin irritation and damage.
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