HESI LPN
HESI Fundamentals Study Guide
1. A healthcare professional is preparing to administer enoxaparin subcutaneously to a client. Which of the following actions should the healthcare professional take?
- A. Administer the medication with the needle at a 45-degree angle.
- B. Administer the medication with the needle at a 90-degree angle.
- C. Inject the medication into the muscle.
- D. Pinch the skin before injecting.
Correct answer: B
Rationale: Enoxaparin is a medication that is administered subcutaneously, which means it should be injected into the fatty tissue layer beneath the skin. Administering enoxaparin at a 90-degree angle ensures proper absorption and reduces the risk of injecting the medication into muscle tissue, which could affect its effectiveness. Injecting the medication at a 45-degree angle may lead to improper absorption as it may not reach the subcutaneous tissue adequately. Injecting the medication into the muscle instead of subcutaneously can alter the absorption rate and therapeutic effects. Pinching the skin before injecting is not necessary for administering enoxaparin subcutaneously and may cause unnecessary discomfort to the client.
2. A client is receiving chemotherapy for breast cancer. Which laboratory value would be most important for the nurse to monitor?
- A. White blood cell count
- B. Hemoglobin level
- C. Serum creatinine
- D. Blood glucose level
Correct answer: A
Rationale: The correct answer is to monitor the white blood cell count. Chemotherapy can lead to neutropenia, which is a decrease in white blood cells, particularly neutrophils. Neutropenia increases the risk of infections, making it crucial to monitor the white blood cell count during chemotherapy. Monitoring hemoglobin level is important but not as critical as white blood cell count in this scenario. Serum creatinine and blood glucose levels are not directly impacted by chemotherapy for breast cancer, making them less relevant to monitor in this situation.
3. A nurse is caring for a client receiving fluid through a peripheral IV catheter. Which of the following findings at the IV site should the nurse identify as infiltration?
- A. purulent exudate
- B. warmth
- C. skin blanching
- D. bleeding
Correct answer: C
Rationale: Infiltration occurs when the IV fluid leaks into the surrounding tissue instead of entering the bloodstream properly. Skin blanching, swelling, and coolness at the IV site are typical signs of infiltration. Purulent exudate (choice A) is associated with infection, warmth (choice B) can indicate phlebitis, and bleeding (choice D) may occur if the IV catheter punctures a blood vessel.
4. 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.
5. A client is about to undergo emergency abdominal surgery for appendicitis. A healthcare professional is demonstrating postoperative deep breathing and coughing exercises to the client. The healthcare professional realizes the client may be unprepared to learn if the client:
- A. Is not feeling well
- B. Reports severe pain
- C. Has low blood pressure
- D. Is anxious
Correct answer: B
Rationale: Severe pain can be a significant distraction and impediment to the learning process. When a client is experiencing severe pain, their focus and attention are primarily directed towards managing the pain, making it difficult for them to absorb and retain new information effectively. Options A, C, and D, although important considerations in a healthcare setting, do not directly impact the client’s ability to learn in the same way that severe pain does. Not feeling well, low blood pressure, and anxiety are all factors that can be addressed or managed to facilitate learning, unlike severe pain which can significantly hinder the learning process.
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