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.
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["B","C","D","E"]
Explanation
Choice A Reason:
Light sensitivity is incorrect. Light sensitivity (photophobia) is not typically a direct manifestation of a ruptured cerebral aneurysm. However, it may occur as a secondary symptom due to other neurological disturbances or increased intracranial pressure.
Choice B Reason:
Loss of consciousness is correct. Loss of consciousness is a common manifestation of a ruptured cerebral aneurysm, particularly if the bleeding leads to significant brain injury or compression of vital brain structures.
Choice C Reason:
A dilated pupil is correct. A dilated pupil (mydriasis) may occur as a result of compression of the oculomotor nerve (cranial nerve III) by the expanding hematoma or increased intracranial pressure following a ruptured cerebral aneurysm.
Choice D Reason:
Visual disturbances is correct. Visual disturbances, such as blurred vision, double vision (diplopia), or loss of vision, may occur due to compression of the optic nerve or damage to visual pathways as a result of the hemorrhage.
Choice E Reason:
Nausea and vomiting is correct. Nausea and vomiting are common symptoms associated with a ruptured cerebral aneurysm, often due to irritation of the meninges and increased intracranial pressure resulting from the bleeding.
Choice F Reason:
Numbness on one side of the face is incorrect. Numbness on one side of the face is not typically a direct manifestation of a ruptured cerebral aneurysm. However, it may occur if the hemorrhage affects specific regions of the brain responsible for sensation or if there is associated compression of cranial nerves.
Correct Answer is A
Explanation
Choice A Reason:
Falls is correct. Among individuals aged 65 years and older, falls are the most common cause of spinal cord injuries. As people age, they may experience changes in balance, mobility, and bone density, which can increase their risk of falling. Falls can occur both at home and in other environments, such as during outdoor activities or in healthcare settings. Spinal cord injuries resulting from falls in older adults can have significant consequences, including decreased mobility, chronic pain, and loss of independence.
Choice B Reason:
Gunshot wounds is incorrect. Gunshot wounds can cause spinal cord injuries, but they are not the most common cause for individuals aged 65 years and older. Gunshot wounds tend to be more common in younger age groups or in specific contexts such as violence-related incidents, which are less frequent in older adults.
Choice C Reason:
Sporting accidents is incorrect. Sporting accidents can also lead to spinal cord injuries, especially in younger and more active individuals participating in high-impact sports. However, among individuals aged 65 years and older, participation in sporting activities that could result in spinal cord injuries is generally less common compared to younger age groups.
Choice D Reason:
Motor vehicle accidents is incorrect.
Motor vehicle accidents can cause spinal cord injuries, but they are not as common in the elderly population as they are in younger age groups. Older adults may have reduced driving frequency or may be more cautious on the road, which decreases their risk of motor vehicle accidents compared to younger individuals.
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