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 intestinal obstructions has a nasogastric tube to low intermittent suction and is receiving an IV of lactated Ringer’s at 100 ml/H. Which finding is most important for the nurse to report to the healthcare provider?
- A. Gastric output of 900 mL in the last 24 hours
- B. Serum potassium level of 3.1 mEq/L or mmol/L (SI)
- C. Increased blood urea nitrogen (BUN)
- D. 24-hour intake at the current infusion rate
Correct answer: B
Rationale: The most crucial finding to report to the healthcare provider in this scenario is a serum potassium level of 3.1 mEq/L. Hypokalemia can lead to serious complications, including cardiac issues. Gastric output, increased BUN, and monitoring the 24-hour intake are essential but do not pose an immediate risk as hypokalemia does in this situation.
3. After a client with leukemia undergoes a bone marrow biopsy and is found to have thrombocytopenia, which nursing assessment is most important following the procedure?
- A. Observe the aspiration site
- B. Assess body temperature
- C. Monitor skin elasticity
- D. Measure urinary output
Correct answer: A
Rationale: The correct answer is to observe the aspiration site. Thrombocytopenia, characterized by a low platelet count, increases the risk of bleeding. Therefore, monitoring the biopsy site for bleeding or hematoma is crucial to ensure early detection and intervention. Assessing body temperature (choice B) is not directly related to the increased bleeding risk associated with thrombocytopenia. Monitoring skin elasticity (choice C) and measuring urinary output (choice D) are important assessments but are not the priority in this situation where bleeding risk needs immediate attention.
4. Which assessment is most important for the nurse to perform before ambulating a client with a history of syncope?
- A. Pedal pulses
- B. Breath sounds
- C. Oxygen saturation
- D. Blood pressure
Correct answer: D
Rationale: The correct answer is 'D: Blood pressure.' It is crucial to check the client's blood pressure before ambulating them, especially if they have a history of syncope. Monitoring blood pressure helps to prevent falls by ensuring that the client's blood pressure is stable enough to tolerate the activity. Choices A, B, and C are not as critical in this scenario. Checking pedal pulses, breath sounds, or oxygen saturation is important but not as crucial as assessing blood pressure when preparing to ambulate a client with a history of syncope.
5. An older male client is admitted to the mental health unit with a sudden onset of global disorientation and is continuously conversing with his mother, who died 50 years ago. The nurse reviews the multiple prescriptions the client is currently taking and assesses his urine specimen, which is cloudy, dark yellow, and has a foul odor. These findings suggest that this client is experiencing which condition?
- A. Psychotic episode
- B. Dementia
- C. Delirium
- D. Depression
Correct answer: C
Rationale: The correct answer is C, delirium. The sudden onset of global disorientation along with cloudy, dark yellow urine with a foul odor are indicative of delirium. Delirium is an acute condition characterized by a fluctuating disturbance in awareness and cognition. In this case, the symptoms are suggestive of an underlying physiological cause, such as infection or medication side effects. Choice A, psychotic episode, is less likely as the symptoms are more in line with delirium than a primary psychotic disorder. Choice B, dementia, is a chronic and progressive condition, not typically presenting with sudden onset disorientation. Choice D, depression, does not align with the acute cognitive changes and urine abnormalities described in the scenario.
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