HESI LPN
CAT Exam Practice
1. A 13-year-old girl, diagnosed with diabetes mellitus Type 1 at the age of 9, is admitted to the hospital in diabetic ketoacidosis. Which occurrence is the most likely cause of the ketoacidosis?
- A. Ate an extra peanut butter sandwich before gym class
- B. Incorrectly drew up and administered too much insulin
- C. Was not hungry, so she skipped eating lunch
- D. Has had a cold and ear infection for the past two days
Correct answer: B
Rationale: The correct answer is B. Incorrect insulin administration is a common cause of diabetic ketoacidosis. Administering too much insulin can lead to uncontrolled hyperglycemia, where the body starts breaking down fat for energy, resulting in the production of ketones. Choices A, C, and D are less likely to directly cause diabetic ketoacidosis. Eating an extra peanut butter sandwich, skipping lunch, or having a cold and ear infection would not directly lead to the metabolic derangements seen in diabetic ketoacidosis.
2. A school nurse is called to the soccer field because a child has a nosebleed (epistaxis). In what position should the nurse place the child?
- A. Sitting up and leaning forward
- B. Reclining with head elevated
- C. Sitting up with head tilted back
- D. Lying flat on the back
Correct answer: A
Rationale: The correct position for a child with a nosebleed (epistaxis) is sitting up and leaning forward. This position helps prevent blood from flowing into the throat and causing choking. Choice B, reclining with the head elevated, and choice D, lying flat on the back, are incorrect as they can cause blood to flow backward into the throat. Choice C, sitting up with the head tilted back, is also incorrect as it can lead to blood flowing down the back of the throat and potentially into the airway.
3. The nurse identifies the presence of clear fluid on the surgical dressing of a client who just returned to the unit following lumbar spinal surgery. What action should the nurse implement immediately?
- A. Change the dressing using a compression bandage
- B. Test fluid on the dressing for glucose
- C. Document the findings in the electronic medical record
- D. Mark drainage area with a pen and continue to monitor
Correct answer: B
Rationale: The correct action for the nurse to implement immediately upon identifying clear fluid on the surgical dressing post-lumbar surgery is to test the fluid for glucose. Clear fluid could indicate cerebrospinal fluid (CSF) leakage, and testing for glucose can help confirm this. Changing the dressing using a compression bandage (Choice A) without further assessment could lead to complications. Documenting the findings (Choice C) is important but not as immediate as confirming the presence of CSF. Marking the drainage area with a pen and monitoring (Choice D) does not address the need for immediate confirmation of CSF leakage.
4. The nurse is conducting intake interviews of children at a city clinic. Which child is most susceptible to contracting lead poisoning?
- A. An adolescent who works part-time in a paint factory
- B. A 2-year-old who plays on aging outdoor playground equipment
- C. A 10-year-old who has Type 1 diabetes mellitus
- D. An 8-year-old who lives in a housing project
Correct answer: B
Rationale: Children playing on aging playground equipment are at higher risk of lead poisoning due to potential exposure from old paint. This is because deteriorating paint on older playground equipment may contain lead, which can be ingested by young children. Choices A, C, and D do not directly involve potential exposure to lead paint, making them less susceptible to lead poisoning compared to a child playing on aging playground equipment.
5. A client diagnosed with a deep vein thrombus (DVT) followed by a diagnosis of pulmonary embolism (PE) is receiving heparin via an infusion pump at a rate of 1400 u/hour. The client tells the nurse, “I wish this medicine would hurry up and dissolve this clot in my lung so that I can go home”. What response is best for the nurse to provide?
- A. Heparin prevents further clot formation, but your risk of bleeding needs to be monitored closely
- B. You seem to be concerned about the length of time it takes for Heparin to dissolve this clot
- C. Let me contact your healthcare provider to discuss the possibility of receiving IV heparin therapy at home
- D. Why are you so anxious to leave the hospital when you know you are not well enough yet?
Correct answer: A
Rationale: The correct response is A: 'Heparin prevents further clot formation, but your risk of bleeding needs to be monitored closely.' Heparin is an anticoagulant that prevents further clot formation, but it does not quickly dissolve existing clots. It is crucial for the nurse to educate the client about the purpose of heparin and the necessity for close monitoring of bleeding risks. Choice B is incorrect as it does not address the misunderstanding about heparin's mechanism of action. Choice C is incorrect as home administration of IV heparin therapy requires careful consideration and should not be suggested without a thorough assessment. Choice D is incorrect as it does not address the client's misconception about heparin's role in dissolving clots and instead focuses on the client's desire to leave the hospital.
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