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

Explanation

Choice A Reason:

Pregabalin is incorrect. Pregabalin is a medication used to treat neuropathic pain, seizures, and generalized anxiety disorder. It is not associated with an increased risk of PML.

Choice B Reason:

Natalizumab is correct.: Natalizumab is a monoclonal antibody used to treat relapsing forms of MS. It is associated with an increased risk of developing PML, particularly in individuals who are JC virus antibody positive. Regular monitoring of JC virus antibody status and clinical vigilance is required when using natalizumab to reduce the risk of PML.

Choice C Reason:

Furosemide: Furosemide is a loop diuretic used to treat edema and hypertension. It is not associated with an increased risk of PML.

Choice D Reason:

Metoprolol is incorrect .Metoprolol is a beta-blocker used to treat hypertension, angina, and heart failure. It is not associated with an increased risk of PML.

A. Repeating the same question over and over B. Awareness of COPD manifestations C. Anxiety and restlessness D. Motivation and engagement of the client

Correct Answer is D

Explanation

Choice A Reason:

Repeating the same question over and over is incorrect. Repeating the same question over and over is not a desired outcome of client education. It may indicate confusion or cognitive impairment rather than effective learning and understanding of COPD management.

Choice B Reason:

Awareness of COPD manifestations is incorrect. This is a desirable outcome of client education. Increasing the client's awareness of COPD manifestations, such as dyspnea, coughing, and sputum production, can help them recognize exacerbations early and take appropriate action to manage their condition.

Choice C Reason:

Anxiety and restlessness is incorrect. Anxiety and restlessness are not desired outcomes of client education. While anxiety is common in individuals with COPD due to the chronic nature of the condition and its impact on daily activities, education should aim to reduce anxiety by providing information and strategies for coping with COPD-related symptoms and challenges.

Choice D Reason:

Motivation and engagement of the client is correct. This is a desirable outcome of client education. Motivating and engaging the client in their own care empowers them to take an active role in managing their COPD and improving their quality of life. Education should provide information, support, and encouragement to help the client feel motivated and engaged in self-management strategies.

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

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