HESI LPN
CAT Exam Practice Test
1. Identify the placement of the stapes footplate into the bony labyrinth.
- A. Fenestra vestibuli
- B. Fenestra cochleae
- C. Tympanic membrane
- D. Round window
Correct answer: A
Rationale: The correct answer is A: Fenestra vestibuli. The stapes footplate is placed into the fenestra vestibuli of the bony labyrinth. This structure is also known as the oval window and is located at the junction of the middle ear and inner ear. Choice B, Fenestra cochleae, is incorrect as this opening is also known as the round window and is located near the base of the cochlea. Choice C, Tympanic membrane, is incorrect as it is also known as the eardrum and separates the external ear from the middle ear. Choice D, Round window, is incorrect as it is the opening covered by the secondary tympanic membrane and is important for the dissipation of sound waves in the cochlea.
2. A client with multiple sclerosis is experiencing scotomas (blind spots), which are limiting peripheral vision. What intervention should the nurse include in this client's plan of care?
- A. Encourage the use of corrective lenses during the day
- B. Practice visual exercises that focus on a still object
- C. Alternate an eye patch from eye every 2 hours
- D. Teach techniques for scanning the environment
Correct answer: D
Rationale: The correct intervention for a client with multiple sclerosis experiencing scotomas and limited peripheral vision is to teach techniques for scanning the environment. This intervention helps the client compensate for vision loss by learning how to scan and explore their surroundings effectively. Encouraging the use of corrective lenses may not address the issue of scotomas, and visual exercises focusing on a still object may not enhance peripheral vision. Alternating an eye patch every 2 hours is not typically indicated for scotomas in multiple sclerosis, making it an incorrect choice.
3. When admitting a client diagnosed with active tuberculosis to isolation, which infection control measures should the nurse implement?
- A. Negative pressure environment
- B. Contact precautions
- C. Droplet precautions
- D. Protective environment
Correct answer: A
Rationale: The correct answer is A: Negative pressure environment. Tuberculosis is transmitted through airborne particles, so a negative pressure room is essential to prevent the spread of the bacteria. Choice B, contact precautions, are used for infections spread by direct or indirect contact, not for tuberculosis. Choice C, droplet precautions, are for infections transmitted through respiratory droplets, not airborne particles like tuberculosis. Choice D, protective environment, is used for protecting immunocompromised patients from outside pathogens, not for preventing the spread of tuberculosis.
4. A client with a history of chronic obstructive pulmonary disease (COPD) is admitted to the hospital. The client is experiencing difficulty breathing and is very anxious. The nurse notes that the client’s oxygen saturation is 88% on room air. Which action should the nurse implement first?
- A. Place the client in a high Fowler’s position
- B. Administer supplemental oxygen
- C. Perform a thorough respiratory assessment
- D. Start an IV infusion of normal saline
Correct answer: B
Rationale: Administering supplemental oxygen is the first priority to address low oxygen saturation and ease breathing. In a client with COPD experiencing difficulty breathing and anxiety with oxygen saturation at 88%, providing supplemental oxygen takes precedence over other actions. Placing the client in a high Fowler’s position may help with breathing but does not address the immediate need for increased oxygenation. Performing a thorough respiratory assessment is important but should come after stabilizing the client's oxygen levels. Starting an IV infusion of normal saline is not the priority in this situation and does not directly address the client's respiratory distress.
5. A male client with schizophrenia is jerking his neck and smacking his lips. Which finding indicates to the nurse that he is experiencing an irreversible side effect of antipsychotic agents?
- A. Cramping muscular pain
- B. Worming movements of the tongue
- C. Decreased tendon reflexes
- D. Dry oral mucous membranes
Correct answer: B
Rationale: The correct answer is B: Worming movements of the tongue. Worming movements of the tongue, known as tardive dyskinesia, are an irreversible side effect of antipsychotic medications. Tardive dyskinesia is characterized by involuntary, repetitive movements of the tongue, lips, face, trunk, and extremities. Cramping muscular pain (Choice A) is more indicative of dystonia, an extrapyramidal side effect that can be treated effectively with antiparkinsonian medications. Decreased tendon reflexes (Choice C) are not typically associated with irreversible side effects of antipsychotic agents. Dry oral mucous membranes (Choice D) are not specific to irreversible side effects of antipsychotic medications.
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