HESI LPN
HESI PN Exit Exam
1. What is the primary function of surfactant in the lungs?
- A. Reduce surface tension
- B. Enhance oxygen absorption
- C. Facilitate carbon dioxide release
- D. Increase lung volume
Correct answer: A
Rationale: The primary function of surfactant in the lungs is to reduce surface tension in the alveoli. This reduction in surface tension prevents lung collapse and allows for easier breathing. It is particularly crucial in premature infants to help with lung expansion. Choice B is incorrect because surfactant primarily affects surface tension, not oxygen absorption. Choice C is incorrect because surfactant's main role is not in facilitating carbon dioxide release. Choice D is incorrect because surfactant does not directly increase lung volume; its main role is in reducing surface tension.
2. In which condition is the 'butterfly rash' most commonly seen?
- A. Systemic lupus erythematosus
- B. Rheumatoid arthritis
- C. Psoriasis
- D. Dermatomyositis
Correct answer: A
Rationale: The correct answer is A: Systemic lupus erythematosus (SLE). The 'butterfly rash' across the cheeks and nose is a classic sign of SLE, an autoimmune disease. This rash is a key dermatological manifestation of SLE, often triggered or worsened by exposure to sunlight. Choices B, C, and D are incorrect because the 'butterfly rash' is not commonly associated with rheumatoid arthritis, psoriasis, or dermatomyositis.
3. After admission, which observation is most important for the nurse to report immediately for an adult client who weighs 150 pounds and has partial-thickness and full-thickness burns over 40% of the body from a house fire?
- A. Poor appetite and refusal to eat
- B. Systolic blood pressure at 102
- C. Painful moaning and crying
- D. Urinary output of 20 ml/hr
Correct answer: D
Rationale: A urinary output of 20 ml/hr is a sign of inadequate kidney perfusion and could indicate hypovolemic shock, which requires immediate intervention. In this situation, with severe burns over a large portion of the body, monitoring urinary output is crucial to assess kidney function and fluid status. Poor appetite, systolic blood pressure at 102, and painful moaning and crying are important but do not indicate the immediate need for intervention like inadequate urinary output does.
4. At 1200, the practical nurse learns that a client's 0900 dose of an anticonvulsant was not given. The next scheduled dose is at 2100. Which action should the PN take?
- A. Administer half of the missed dose immediately
- B. Administer the missed dose as soon as possible
- C. Give the missed dose with the next scheduled dose
- D. Withhold the missed dose unless seizure activity occurs
Correct answer: B
Rationale: Administering the missed dose as soon as possible is crucial in this situation. Missing an anticonvulsant dose can lead to breakthrough seizures, which are harmful to the client. Administering the missed dose promptly helps maintain the therapeutic level of the medication and reduces the risk of seizure activity. Giving half the dose may not provide adequate protection against seizures. Delaying the dose until the next scheduled time increases the time the client is without the medication, potentially increasing the risk of seizures. Withholding the missed dose unless seizure activity occurs is not recommended, as prevention is key in managing anticonvulsant therapy.
5. The nurse determines that a client with cirrhosis is experiencing peripheral neuropathy. What action should the nurse take?
- A. Protect the client's feet from injury
- B. Apply a heating pad to affected area
- C. Keep the client's feet elevated
- D. Assess the feet and legs for jaundice
Correct answer: A
Rationale: Protecting the client's feet from injury is essential when managing peripheral neuropathy in a client with cirrhosis. Peripheral neuropathy can result in reduced sensation, increasing the risk of injury. Applying a heating pad or keeping the client's feet elevated would not address the primary concern of preventing injury. Assessing the feet and legs for jaundice is important for monitoring liver function, but it is not directly related to managing peripheral neuropathy in this case.
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