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. Which action should the nurse include in the plan of care for a client receiving acyclovir (Zovirax) IV for treatment of herpes zoster (shingles)?
- A. Initiate cardiac telemetry monitoring
- B. Maintain continuous pulse oximetry
- C. Perform capillary glucose measurements
- D. Monitor serum creatinine levels
Correct answer: D
Rationale: The correct answer is D: Monitor serum creatinine levels. Acyclovir can lead to nephrotoxicity, making it essential to monitor kidney function through serum creatinine levels. While cardiac telemetry monitoring (choice A) and maintaining continuous pulse oximetry (choice B) are important in certain conditions, they are not directly related to acyclovir therapy for herpes zoster. Performing capillary glucose measurements (choice C) is not a priority when administering acyclovir for herpes zoster. Monitoring serum creatinine levels is crucial to detect any potential renal issues early, as the drug's nephrotoxic potential requires close monitoring of kidney function.
3. A woman at 24-weeks gestation who has fever, body aches, and has been coughing for the last 5 days is sent to the hospital with admission prescriptions for H1N1 influenza. Which action has the highest priority?
- A. Administer Ringer's Lactate IV 125ml/8 hours
- B. Obtain specimens for cultures
- C. Assign a private room
- D. Monitor vital signs q4 hours
Correct answer: C
Rationale: Assigning a private room has the highest priority in this scenario. It helps prevent the spread of H1N1 influenza to other patients and protects both the patient and others from potential infection. Obtaining specimens for cultures and monitoring vital signs are important but do not address the immediate need to prevent the spread of the virus. Administering Ringer's Lactate IV is not the priority in this case as it does not directly address the infectious nature of the condition.
4. The nurse is providing care for a client with chronic obstructive pulmonary disease (COPD). Which intervention is most appropriate to include in the care plan?
- A. Instruct the client to use pursed-lip breathing
- B. Recommend a high-fat, low-carbohydrate diet
- C. Limit physical activity to prevent shortness of breath
- D. Encourage the client to drink large amounts of fluids
Correct answer: A
Rationale: The correct answer is A: Instruct the client to use pursed-lip breathing. Pursed-lip breathing helps improve ventilation and reduce shortness of breath in COPD clients. This technique involves inhaling slowly through the nose and exhaling through pursed lips. Choice B is incorrect because a high-fat, low-carbohydrate diet is not recommended for individuals with COPD as it can lead to weight gain and worsen respiratory function. Choice C is incorrect as limiting physical activity can lead to deconditioning and worsen COPD symptoms. Regular, moderate exercise is beneficial for individuals with COPD. Choice D is incorrect as excessive fluid intake can strain the heart in COPD clients. It is important to maintain adequate but not excessive fluid intake to prevent dehydration and maintain optimal lung function.
5. Which type of Leukocyte is involved with allergic responses and the destruction of parasitic worms?
- A. Neutrophils
- B. Lymphocytes
- C. Eosinophils
- D. Monocytes
Correct answer: C
Rationale: Eosinophils are the correct answer. Eosinophils are specialized white blood cells that play a crucial role in allergic responses and combating parasitic infections. They release substances to destroy parasites and modulate allergic reactions. Neutrophils (Choice A) are mainly involved in fighting bacterial infections. Lymphocytes (Choice B) play a key role in the immune response, including antibody production, but are not primarily responsible for combating parasites or allergic responses. Monocytes (Choice D) are involved in immune defense, differentiating into macrophages or dendritic cells, but they are not mainly associated with allergic responses or parasitic worm destruction.
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