HESI LPN
CAT Exam Practice Test
1. An adult suffered burns to the face and chest resulting from a grease fire. On admission, the client was intubated, and a 2-liter bolus of normal saline was administered IV. Currently, the normal saline is infusing at 250 ml/hour. The client’s heart rate is 120 beats/minute, blood pressure is 90/50 mmHg, respirations are 12 breaths/minute over the ventilated 12 breaths for a total of 24 breaths/minute, and the central venous pressure (CVP) is 4 mm H2O. Which intervention should the nurse implement?
- A. Increase the rate of normal saline infusion
- B. Infuse an additional bolus of normal saline
- C. Lower the head of the bed to a recumbent position
- D. Bring a tracheostomy tray to the bedside
Correct answer: B
Rationale: The correct intervention is to infuse an additional bolus of normal saline. The client's presentation with a heart rate of 120 beats/minute, hypotensive blood pressure of 90/50 mmHg, and low CVP of 4 mm H2O indicates hypovolemic shock. Administering more normal saline can help in restoring intravascular volume and improving perfusion. Increasing the rate of normal saline infusion (Choice A) is not the best choice as it may lead to fluid overload. Lowering the head of the bed to a recumbent position (Choice C) could worsen hypotension by reducing venous return. Bringing a tracheostomy tray to the bedside (Choice D) is not a priority at this time as the client is already intubated, and the immediate concern is addressing the hypovolemia.
2. The client demonstrates an understanding of sliding scale insulin administration instructions by performing the procedure in which order?
- A. Obtain blood glucose level
- B. Verify the insulin prescription
- C. Draw insulin into insulin syringe
- D. Cleanse the selected site
Correct answer: A
Rationale: The correct order for the client to perform the procedure is to first obtain the blood glucose level. This step is crucial as it helps determine the appropriate dose of insulin based on the sliding scale. Verifying the insulin prescription, drawing insulin into the syringe, and cleansing the selected site are important steps in the process but should follow after obtaining the blood glucose level. Therefore, options B, C, and D are incorrect in terms of the initial steps required for sliding scale insulin administration.
3. The mother of a teenager is told that her son has recently been found stealing from other students at school. The mother's response is, 'I cannot think about that today.' The nurse determines that this mother is using which defense mechanism?
- A. Suppression
- B. Repression
- C. Sublimation
- D. Undoing
Correct answer: A
Rationale: The correct answer is A, Suppression. Suppression involves a conscious effort to avoid dealing with distressing thoughts or feelings. In this case, the mother is consciously choosing not to think about her son's behavior. Choice B, Repression, involves unconsciously blocking out distressing thoughts or feelings. Choice C, Sublimation, is the channeling of unacceptable impulses into socially acceptable behaviors, which is not demonstrated in this scenario. Choice D, Undoing, is a defense mechanism where a person tries to undo or reverse a negative thought or action by performing a contrary behavior, which is not applicable here.
4. A client with a large pleural effusion undergoes a thoracentesis. Following the procedure, which assessment finding warrants immediate intervention by the nurse?
- A. The client has asymmetrical chest wall expansion
- B. The client complains of pain at the insertion site
- C. The client's chest x-ray indicates decreased pleural effusion
- D. The client's arterial blood gases show pH 7.35, PaO2 85, PaCO2 35, HCO3 26
Correct answer: A
Rationale: Asymmetrical chest wall expansion is a critical finding post-thoracentesis as it may suggest a pneumothorax, requiring immediate intervention to prevent further complications. The other options, such as pain at the insertion site (Choice B), decreased pleural effusion on chest x-ray (Choice C), and normal arterial blood gases within acceptable ranges (Choice D) do not indicate an immediate need for intervention like asymmetrical chest wall expansion does.
5. For a client with pneumonia, the prescription states, “Oxygen at liters/min per nasal cannula PRN difficult breathing.” Which nursing intervention is effective in preventing oxygen toxicity?
- A. Avoiding the administration of oxygen at high levels for extended periods.
- B. Administering a sedative at bedtime to slow the client’s respiratory rate.
- C. Removing the nasal cannula during the night to prevent oxygen buildup.
- D. Running oxygen through a hydration source prior to administration.
Correct answer: A
Rationale: Choice A is the correct answer because prolonged exposure to high levels of oxygen can lead to oxygen toxicity. Administering oxygen at high levels for extended periods can overwhelm the body's natural defenses against high oxygen levels, causing toxicity. Choices B, C, and D are incorrect. Choice B is unrelated to preventing oxygen toxicity. Choice C is unsafe as removing the nasal cannula can deprive the client of necessary oxygen. Choice D, running oxygen through a hydration source, is not a standard practice for preventing oxygen toxicity.
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