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 C

Explanation

Choice A Reason:

Placing the client on clear liquids might not be appropriate in this situation because absent bowel sounds in the lower abdominal quadrants could indicate a more serious gastrointestinal issue such as ileus or bowel obstruction. Clear liquids may exacerbate these conditions and are not sufficient to address the underlying problem. Therefore, this option is not recommended until the cause of absent bowel sounds is identified and addressed.

Choice B Reason:

Performing a hemoccult blood test is not directly relevant to the situation described. Hemoccult tests are used to detect occult (hidden) blood in stool, which can be indicative of gastrointestinal bleeding. While it's important to assess for gastrointestinal bleeding in some cases, absent bowel sounds in the lower abdominal quadrants suggest a more immediate concern related to gastrointestinal motility rather than bleeding. Therefore, this option is not the most appropriate action at this time.

Choice C Reason:

Inserting a nasogastric tube is the most appropriate action in this scenario. Absent bowel sounds in a client with a spinal cord injury can indicate neurogenic bowel dysfunction, which may lead to abdominal distention and discomfort. Inserting a nasogastric tube can help decompress the stomach and intestines, reducing the risk of complications such as aspiration and providing relief from discomfort. It can also help manage gastrointestinal complications until further assessment and interventions can be implemented.

Choice D Reason:

Forcing the intake of fluids may not be appropriate without further assessment and could potentially worsen the client's condition if there is an underlying gastrointestinal issue leading to absent bowel sounds. Additionally, forcing fluids may not address the potential issue of gastrointestinal bleeding.

A. Hypertension B. Bradycardia C. Fecal impaction D. Arthralgia

Correct Answer is D

Explanation

Choice A Reason:

Hypertension is not typically associated with heterotopic ossifications. However, it may occur in individuals with spinal cord injuries (SCI) due to autonomic dysreflexia, a condition characterized by an exaggerated sympathetic response to stimuli below the level of injury. Autonomic dysreflexia can lead to a sudden increase in blood pressure, which, if left untreated, can result in complications such as stroke or seizure. However, hypertension is not directly related to heterotopic ossifications.

Choice B Reason:

Bradycardia is also not typically associated with heterotopic ossifications. Like hypertension, bradycardia may occur in individuals with SCI due to autonomic dysreflexia. Autonomic dysreflexia can lead to a sudden increase in blood pressure and a reflex bradycardia in response to the increased sympathetic outflow. However, bradycardia is not directly related to heterotopic ossifications.

Choice C Reason:

Fecal impaction is a potential complication of spinal cord injury (SCI) due to impaired bowel function, but it is not directly related to heterotopic ossifications. SCI can disrupt normal bowel motility and result in neurogenic bowel dysfunction, leading to symptoms such as constipation, fecal impaction, and bowel obstruction. However, fecal impaction is not specific to heterotopic ossifications.

Choice D Reason:

Arthralgia is correct. Heterotopic ossifications (HO) involve the abnormal formation of bone in soft tissues around joints, muscles, tendons, or ligaments. When HO occurs around joints, it can lead to symptoms such as pain, swelling, and decreased range of motion, collectively known as arthralgia. Therefore, arthralgia is a common finding associated with heterotopic ossifications in individuals with spinal cord injuries.

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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

A nurse is caring for a client who has a spinal cord injury and has absent bowel sounds in the lower abdominal quadrants. Which of the following actions should the nurse perform?

Correct Answer is C

Explanation

A nurse is assessing a client who has a spinal cord injury with heterotopic ossifications. Which of the following findings should the nurse expect?

Correct Answer is D

Explanation

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