Which of the following is true regarding the physiology of an open pneumothorax?

Air cannot pass freely into the thoracic cavity through a chest wound.

The air is trapped when it enters the cavity.

Air moves in and out of a wound in the chest wall.

There are no audible sounds in an open pneumothorax.

Answer and Explanation

The Correct Answer is C

Choice A Reason:

Air cannot pass freely into the thoracic cavity through a chest wound is incorrect because air can indeed pass freely into the thoracic cavity through the chest wound in an open pneumothorax.

Choice B Reason:

The air is trapped when it enters the cavity is incorrect because the characteristic feature of an open pneumothorax is that air is not trapped; rather, it enters the thoracic cavity with each inhalation and exits with each exhalation through the chest wound.

Choice C Reason:

Air moves in and out of a wound in the chest wall is correct. In an open pneumothorax, also known as a "sucking chest wound," air can freely move in and out of the thoracic cavity through a wound in the chest wall. This occurs due to the creation of a communication pathway between the external environment and the pleural space, typically caused by a penetrating injury to the chest.

Choice D Reason:

There are no audible sounds in an open pneumothorax is incorrect because in an open pneumothorax, there may be audible sounds associated with the movement of air in and out of the wound, such as a sucking or bubbling sound, depending on the size and location of the wound. These sounds can be clinically significant and aid in the diagnosis of an open pneumothorax.

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Correct Answer is ["B","C","D","E","F"]

Explanation

Choice A Reason:

Easily getting back to sleep after awakening is incorrect. This is not typically a manifestation of obstructive sleep apnea. Instead, individuals with OSA often experience fragmented sleep due to frequent awakenings caused by apnea episodes.

Choice B Reason:

Many episodes of apnea per night is correct. Yes, individuals with obstructive sleep apnea experience many episodes of apnea (complete cessation of breathing) or hypopnea (partial obstruction of airflow) per night. These episodes can occur multiple times throughout the night, disrupting normal sleep patterns.

Choice C Reason:

Loud snort after breathing cessation is correct. This is a characteristic manifestation of obstructive sleep apnea. Individuals with OSA often make choking, snorting, or gasping sounds after a period of breathing cessation as they attempt to resume breathing.

Choice D Reason:

10 seconds or longer of breathing cessation is correct. Yes, breathing cessation episodes in obstructive sleep apnea typically last for 10 seconds or longer. These prolonged episodes of apnea contribute to oxygen desaturation and disrupted sleep.

Choice E Reason:

Daytime sleepiness is correct. Yes, daytime sleepiness is a common symptom of obstructive sleep apnea. Disrupted sleep patterns and frequent awakenings during the night can lead to excessive daytime sleepiness, fatigue, and decreased alertness.

Choice F Reason:

Frequent, loud snoring is correct. Yes, frequent, loud snoring is a hallmark symptom of obstructive sleep apnea. Snoring occurs due to the partial obstruction of airflow in the upper airway during sleep.

A. The client has no sensation or movement below the level of the injury. B. The client has some movement but no sensation below the level of the injury. C. The client has some movement and also some sensation below the level of the injury. D. The client has some sensation but no movement below the level of the Injury.

Correct Answer is A

Explanation

Choice A Reason:

The client has no sensation or movement below the level of the injury is correct. This is a characteristic finding of a complete spinal cord injury, where there is total loss of sensory and motor function below the level of the injury. This pattern is often seen in injuries involving the cervical spinal cord, such as at the level of C7.

Choice B Reason:

The client has some movement but no sensation below the level of the injury is incorrect. This finding would be more indicative of an incomplete spinal cord injury, where there is partial preservation of sensory or motor function below the level of the injury. However, with a transection of the spinal cord at C7, it is less likely for the client to have retained movement below the level of injury.

Choice C Reason:

The client has some movement and also some sensation below the level of the injury is incorrect. This finding is not typically associated with a spinal cord injury at the level of C7. With a transection of the spinal cord at this level, there is typically complete loss of sensory and motor function below the level of the injury.

Choice D Reason:

The client has some sensation but no movement below the level of the injury is incorrect. This finding is more consistent with an incomplete spinal cord injury, where there may be partial preservation of sensory function but no motor function below the level of the injury. However, with a transection of the spinal cord at C7, it is less likely for the client to have retained sensation below the level of injury.

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Which of the following is true regarding the physiology of an open pneumothorax?

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Naxlex Comprehensive Predictor Exams

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Explanation

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Correct Answer is A

Explanation

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