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 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.

A. Memory loss B. Clumsiness C. Tardive dyskinesia D. Seizures E. Vision difficulty

Correct Answer is ["A","B","D","E"]

Explanation

Choice A Reason:

Memory loss is correct. Memory loss can occur in individuals with PML due to damage to the white matter of the brain caused by the JC virus infection. This damage can affect cognitive function, including memory.

Choice B Reason:

Clumsiness is correct. Clumsiness or lack of coordination is a common neurological symptom of PML. It can result from damage to areas of the brain responsible for motor function and coordination.

Choice C Reason:

Tardive dyskinesia is incorrect. Tardive dyskinesia is a movement disorder characterized by involuntary, repetitive movements, often involving the face, lips, tongue, and limbs. While tardive dyskinesia can occur as a side effect of certain medications, it is not typically associated with PML.

Choice D Reason:

Seizures is correct. Seizures can occur in individuals with PML due to the involvement of the brain's white matter by the JC virus infection. Seizures may present as sudden, uncontrolled movements, altered consciousness, or other neurological symptoms.

Choice E Reason:

Vision difficulty is correct. Vision difficulties, including blurred vision, visual field deficits, and other visual disturbances, are common manifestations of PML. Damage to the optic nerves or areas of the brain involved in visual processing can result in vision difficulties.

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

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