A nurse is caring for a client who has sustained a neurologic injury with increased intracranial pressure and decreased cerebral perfusion.
Which of the following will maintain cerebral perfusion pressure constant?
Regulation of the amount of carbon dioxide exhaled
Regulation of catecholamines circulating throughout the body
Regulation of how much blood is pumped from the heart
Regulation of constriction and dilation of blood vessels in the brain
The Correct Answer is D
Choice A rationale
Regulation of the amount of carbon dioxide exhaled can affect cerebral blood flow, but it does not directly maintain cerebral perfusion pressure constant.
Choice B rationale
Catecholamines circulating throughout the body can affect blood pressure and heart rate, but they do not directly maintain cerebral perfusion pressure constant.
Choice C rationale
How much blood is pumped from the heart, also known as cardiac output, can affect cerebral perfusion pressure. However, it does not directly maintain cerebral perfusion pressure constant.
Choice D rationale
Regulation of constriction and dilation of blood vessels in the brain, also known as cerebral autoregulation, is a key mechanism that maintains cerebral perfusion pressure constant. When pressure autoregulation is impaired, cerebral blood flow becomes dependent on cerebral perfusion pressure.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
Choice A rationale
A Computerized Tomography Angiography (CTA) scan is often used to diagnose a Transient Ischemic Attack (TIA). This imaging test can provide detailed images of blood vessels in the brain and neck, allowing healthcare providers to identify blockages or other abnormalities that could have caused the TIA12.
Choice B rationale
A Transesophageal Echocardiogram (TEE) is a type of echocardiogram that uses a probe passed down the esophagus to obtain detailed images of the heart. While it can be useful in diagnosing certain heart conditions, it is not typically the first-line diagnostic test for a TIA12.
Choice C rationale
A Complete Blood Count (CBC) is a blood test that measures different components of the blood, including red and white blood cells and platelets. While it can provide useful information about a person’s overall health, it is not typically used to diagnose a TIA12.
Choice D rationale
Prothrombin Time (PT) is a blood test that measures how long it takes for your blood to clot. While it can provide information about clotting disorders, it is not typically used to diagnose a
Correct Answer is ["A","B","D","E"]
Explanation
Choice A rationale
Assessing muscle strength is important after a fall as it can help determine if the fall was due to muscle weakness or other neurological issues.
Choice B rationale
Checking for facial symmetry is crucial as asymmetry may indicate a stroke or other serious neurological condition.
Choice C rationale
While checking peripheral pulses is important in general, it may not be the top priority in this case unless there is a specific reason to suspect circulatory issues.
Choice D rationale
Evaluating vision changes is important as sudden vision loss or changes could indicate a serious condition such as a stroke.
Choice E rationale
Checking for aphasia, or difficulty with language, is crucial as it can be a sign of a stroke or other serious neurological condition.
Choice F rationale
Asking about smoking history may not be a priority in the immediate assessment of a patient who has just fallen.
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