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. A client on bedrest refuses to wear the prescribed pneumatic compression devices after surgery. Which action should the PN implement in response to the client's refusal?

Correct answer: A

Rationale: The correct action for the PN to implement when a client refuses pneumatic compression devices is to emphasize the importance of active foot flexion. Active foot flexion exercises can help prevent deep vein thrombosis (DVT) in clients who are not using the compression devices. Encouraging some form of circulation-promoting activity is crucial to reduce the risks associated with immobility. Checking the surgical dressing (Choice B) is important but not the immediate action to address the refusal of compression devices. Completing an incident report (Choice C) is not necessary in this situation as the client's refusal is not an incident. Explaining the use of an incentive spirometer (Choice D) is not directly related to addressing the refusal of compression devices for DVT prevention.

3. You are caring for a patient who just gave birth to a 6 lb. 13 oz. baby boy. The infant gave out a lusty cry, had a pink coloration all over his body, had flexed arms and legs, cried when stimulated, and had a pulse rate of 94. What Apgar score would you expect for this baby?

Correct answer: D

Rationale: The Apgar score is a method used to quickly assess the health of newborns. In this scenario, the baby would receive 2 points for color, reflex irritability, and muscle tone, but only 1 point for a pulse rate of 94, resulting in an Apgar score of 9. An Apgar score of 9 indicates that the baby is in good health overall. Choice A (10) is incorrect because a pulse rate of 94 would only score 1 point. Choices B (8) and C (7) are incorrect as the given criteria would lead to a higher score, indicating the baby's good health.

4. What is the first step in using an automated external defibrillator (AED) on a patient who has collapsed?

Correct answer: B

Rationale: The correct answer is B: Turn on the AED and follow the voice prompts. This is the first step in using an AED as the device will guide you through the process of analyzing the heart rhythm and delivering a shock if necessary. Choice A, applying the pads to the chest, comes after turning on the AED. Checking the patient's pulse (Choice C) is not necessary before using an AED as the device is specifically designed to assess the need for defibrillation. Ensuring the area is clear (Choice D) is important for safety but is not the initial step in using an AED.

5. The UAP reports to the nurse that a client refused to bathe for the third consecutive day. Which action is best for the nurse to take?

Correct answer: D

Rationale: The correct action for the nurse to take is to ask the client why the bath was refused. Understanding the client's reason for refusal is crucial in identifying and addressing any underlying concerns or issues that may be contributing to the refusal. This approach promotes open communication, client-centered care, and helps in developing a plan of care that is tailored to the client's needs and preferences. Choices A, B, and C do not directly address the root cause of the refusal and may not effectively resolve the situation.

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