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 A
Explanation
Choice A Reason:
The client should maintain systolic BP between 120 and 129 mm Hg. This option aligns with current guidelines for blood pressure management following a transient ischemic attack (TIA). Tight blood pressure control is recommended to reduce the risk of recurrent cerebrovascular events, such as stroke. Maintaining systolic blood pressure (SBP) between 120 and 129 mm Hg has been associated with significant risk reduction in stroke recurrence compared to higher blood pressure targets. Therefore, this option reflects the recommended approach for blood pressure management in individuals with a history of TIA.
Choice B Reason:
The client should maintain systolic BP between 136 and 140 mm Hg: This option suggests a systolic blood pressure (SBP) range that is higher than the recommended target for blood pressure management following a TIA. Allowing SBP to remain in the range of 136 to 140 mm Hg may pose an increased risk of recurrent cerebrovascular events compared to tighter blood pressure control.
Choice C Reason:
The client should maintain systolic BP between 141 and 145 mm Hg. Similarly, this option proposes a systolic blood pressure (SBP) range that is higher than the recommended target for blood pressure management following a TIA. Allowing SBP to remain in the range of 141 to 145 mm Hg may not provide adequate protection against stroke recurrence compared to tighter blood pressure control.
Choice D Reason:
The client should maintain systolic BP between 130 and 135 mm Hg. While this option suggests a systolic blood pressure (SBP) range that is closer to the recommended target compared to options B and C, it still falls slightly above the optimal range for blood pressure management following a TIA. Tighter blood pressure control, ideally below 130 mm Hg, is typically preferred to reduce the risk of recurrent cerebrovascular events.
Correct Answer is B
Explanation
Primary progressive multiple sclerosis (PPMS) is false. This subtype of MS is characterized by a gradual worsening of symptoms from the onset of the disease, without distinct relapses or remissions. It typically leads to a progressive accumulation of disability over time, without periods of remission. The pattern described by the client, with alternating periods of active symptoms and symptom-free periods, does not align with the continuous progression seen in PPMS.
Choice B Reason:
Relapsing-remitting multiple sclerosis (RRMS) is true. RRMS is characterized by distinct relapses, during which new symptoms may appear or existing symptoms may worsen, followed by periods of partial or complete recovery (remissions), during which the symptoms improve or may even disappear entirely. This pattern matches the description provided by the client, indicating RRMS as the likely subtype.
Choice C Reason:
Clinically isolating syndrome (CIS) is false. CIS refers to a single episode of neurological symptoms caused by inflammation or demyelination in the central nervous system, which may or may not progress to MS. However, CIS does not involve the characteristic pattern of relapses and remissions seen in RRMS.
Choice D Reason:
Secondary progressive multiple sclerosis (SPMS) is false. SPMS is characterized by a gradual worsening of symptoms and disability over time, following an initial period of relapsing-remitting disease. It may or may not involve distinct relapses and remissions, depending on the individual's disease course. While SPMS can involve periods of symptom exacerbation, it typically lacks the clear pattern of relapses followed by remissions seen in RRMS.
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