what is the primary function of surfactant in the lungs
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Nursing Elites

HESI LPN

HESI PN Exit Exam

1. What is the primary function of surfactant in the lungs?

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. The home health nurse suspects elder abuse after observing fresh lacerations on the arms and legs of an older adult male client who lives with his daughter. Which action is most important for the nurse to take?

Correct answer: B

Rationale: In cases where elder abuse is suspected, the most critical action for the nurse to take is to report the findings to the supervisor for referral to adult protective services. This step is essential to protect the client from further harm and ensure their safety. Documenting the lacerations, as suggested in choice A, is important but not as urgent as ensuring immediate intervention by reporting the abuse. Asking the daughter for information, as in choice C, may not be effective if she is the abuser. Applying dressings, as in choice D, is a lower priority compared to taking action to address the suspected abuse.

3. After a hip replacement surgery, a client is instructed to use an abduction pillow while in bed. What is the primary purpose of this device?

Correct answer: B

Rationale: The primary purpose of using an abduction pillow after hip replacement surgery is to prevent hip dislocation. The abduction pillow keeps the legs separated, which reduces the risk of hip dislocation by preventing excessive internal rotation and adduction of the hip joint. Choices A, C, and D are incorrect as the main goal of using the abduction pillow is to maintain proper positioning and stability of the hip joint to prevent dislocation, rather than addressing blood clots, circulation, or pain relief.

4. A client who is post-operative from a spinal fusion surgery reports a sudden onset of severe headache when sitting up. What is the nurse’s priority action?

Correct answer: B

Rationale: In this scenario, the correct action is to lay the client flat and notify the healthcare provider. A severe headache in a post-operative spinal fusion patient can indicate a spinal fluid leak, which is a medical emergency. By laying the client flat, the nurse helps reduce symptoms by decreasing pressure differentials. Administering pain medication without further assessment or intervention is inappropriate before identifying the cause of the headache. Encouraging the client to drink more fluids is not the priority when a serious complication like a spinal fluid leak is suspected. While assessing the surgical site is important, it is not the priority when a potentially life-threatening complication is suspected.

5. The PN is caring for a client who had an acute brain attack with resulting expressive aphasia and urinary incontinence. To ensure care for the client, which task should the PN delegate to the UAP?

Correct answer: C

Rationale: Assisting the client to the bedside commode is an appropriate task for the UAP as it involves basic patient care and mobility assistance, which are within the UAP's scope of practice. Options A and B involve communication techniques and documentation, which are more appropriate for licensed nursing staff. Option D involves establishing a bladder training schedule, which requires assessment and planning skills beyond the UAP's role.

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