HESI LPN
CAT Exam Practice Test
1. 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.
2. When preparing the client for a thoracentesis, which action is essential for the nurse to take?
- A. Encourage the client to cough during the procedure
- B. Ask the client to void prior to the procedure
- C. Have the client lie in the prone position
- D. Determine if chest x-rays have been completed
Correct answer: B
Rationale: The essential action for the nurse to take when preparing a client for a thoracentesis is to ask the client to void prior to the procedure. This step is crucial as it helps prevent discomfort and reduces the risk of accidental injury. Encouraging the client to cough during the procedure (Choice A) is inappropriate as it can affect the accuracy of the thoracentesis. Having the client lie in the prone position (Choice C) is incorrect; the procedure is typically performed with the client sitting upright or slightly leaning forward. While determining if chest x-rays have been completed (Choice D) is important, ensuring the client has emptied their bladder is more critical for their comfort and safety during the procedure.
3. A client who received multiple antihypertensive medications experiences syncope due to a drop in blood pressure to 70/40. What is the rationale for the nurse’s decision to hold the client’s scheduled antihypertensive medication?
- A. Increased urinary clearance of the multiple medications has led to diuresis and lowered the blood pressure.
- B. The antagonistic interaction among the various blood pressure medications has reduced their effectiveness.
- C. The additive effect of multiple medications has caused the blood pressure to drop too low.
- D. The synergistic effect of the multiple medications has resulted in drug toxicity and resulting hypotension.
Correct answer: C
Rationale: The correct answer is C. When a client experiences syncope due to a significant drop in blood pressure after receiving multiple antihypertensive medications, the additive effect of these medications can cause the blood pressure to drop excessively. This additive effect can lead to hypotension, which is why the nurse decided to hold the client's scheduled antihypertensive medication. Choices A, B, and D provide incorrect rationales. Choice A mentions diuresis, which is not directly related to the drop in blood pressure due to additive medication effects. Choice B refers to an antagonistic interaction reducing effectiveness, which is not applicable in this scenario. Choice D talks about a synergistic effect leading to drug toxicity, which is not the cause of the sudden drop in blood pressure observed in the client.
4. A 12-year-old client who had an appendectomy two days ago is receiving 0.9% normal saline at 50 ml/hour. The client’s urine specific gravity is 1.035. What action should the nurse implement?
- A. Encourage popsicles and fluids of choice
- B. Evaluate postural blood pressure measurements
- C. Obtain a specimen for urinalysis
- D. Assess bowel sounds in all quadrants
Correct answer: A
Rationale: Encouraging fluids helps address dehydration and potentially high urine specific gravity, which is often related to inadequate fluid intake. In this scenario, the client may be at risk of dehydration due to the appendectomy and the high urine specific gravity. Encouraging popsicles and fluids of choice can help increase fluid intake and improve hydration status. The other options are not the priority at this time. Postural blood pressure measurements may be relevant for assessing fluid status but are not the immediate action needed. Obtaining a specimen for urinalysis and assessing bowel sounds are not the priority actions based on the client's condition.
5. What actions should the nurse take regarding an older adult male who had an abdominal cholecystectomy and has become increasingly confused and disoriented over the past 24 hours, found wandering into another client’s room and returned to his own room by the unlicensed assistive personnel (UAP)? (Select all that apply)
- A. Apply soft upper limb restraints and raise all four bed rails
- B. Report mental status change to the healthcare provider
- C. Assess the client’s breath sounds and oxygen saturation
- D. Assign the UAP to re-assess the client’s risk for falls
Correct answer: B
Rationale: In this situation, the appropriate action for the nurse to take is to report the mental status change to the healthcare provider. Confusion and disorientation post-surgery can be indicative of various factors, such as electrolyte imbalances or respiratory issues, necessitating comprehensive assessment by the healthcare team. Applying restraints and raising bed rails may not address the underlying cause of the confusion, and assigning the UAP to reassess the client's risk for falls does not directly address the cognitive changes observed.
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