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. While conducting a mental status examination of a newly admitted male client, the PN notes that his head is lowered, and he shows no emotion or expression when speaking. Based on these observations, what documentation should the PN include?

Correct answer: C

Rationale: The correct answer is C: 'Flat affect.' Flat affect refers to a lack of emotional expression, which the PN observed in the client. This observation is significant as it can provide valuable information for the client's mental health assessment and subsequent care planning. Choice A, 'Impaired verbalization,' does not capture the lack of emotional expression seen in the client. Choice B, 'Depressed mood,' may not accurately reflect the observed behavior of the client. Choice D, 'Diminished LOC,' pertains to the level of consciousness, which was not indicated as being a concern in the scenario provided.

3. Which type of isolation precaution is required for a patient with tuberculosis (TB)?

Correct answer: C

Rationale: The correct answer is C: Airborne precautions. Tuberculosis (TB) is transmitted via airborne particles, thus requiring airborne precautions to prevent the spread of infection. This includes using an N95 respirator to filter out small infectious particles. Droplet precautions (Choice A) are used for diseases that spread through large respiratory droplets. Contact precautions (Choice B) are for direct or indirect contact with the patient or their environment. Standard precautions (Choice D) are used for all patients to prevent the spread of infection through blood, bodily fluids, non-intact skin, and mucous membranes.

4. What is the most common cause of acute pancreatitis?

Correct answer: A

Rationale: The correct answer is A: Gallstones. Gallstones are the most common cause of acute pancreatitis as they obstruct the pancreatic duct, leading to inflammation. While alcohol abuse (Choice B) can also cause pancreatitis, gallstones are more prevalent. Hypertriglyceridemia (Choice C) is a less common cause of acute pancreatitis compared to gallstones. Infection (Choice D) is not a primary cause of acute pancreatitis; gallstones are the leading etiology.

5. A client is post-operative day one following an open cholecystectomy. The nurse notices the client's drainage from the T-tube is dark green. What is the most appropriate action for the nurse to take?

Correct answer: A

Rationale: Dark green drainage from a T-tube after a cholecystectomy is bile, which is an expected finding. Bile is normally dark green in color. It is important for the nurse to recognize this as a normal post-operative occurrence and document the finding. There is no need to notify the healthcare provider immediately as this finding is an anticipated part of the client's recovery. Decreasing the suction on the T-tube or flushing it with saline is unnecessary and may not be indicated based on the color of the drainage. Therefore, the most appropriate action for the nurse to take is to document the dark green drainage as a normal finding.

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