If blood flow to the brain is interrupted, how quickly does cellular death occur?
8 minutes.
2 minutes
20 minutes
5 minutes
The Correct Answer is B
B. Brain cells begin to die within 2 minutes if blood flow is interrupted, which is why rapid intervention is crucial during a stroke or other conditions that block cerebral blood flow.
A. 8 minutes is too long for brain cells to survive without oxygen.
C. 20 minutes is too long for brain cells to survive without oxygen.
D. 5 minutes is too long for brain cells to survive without oxygen.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","D","E"]
Explanation
A. Managing sedation helps prevent agitation and decreases metabolic demands, which can exacerbate ICP.
B. Monitoring volume status is essential to prevent fluid imbalances that can worsen ICP.
C. Completing hourly endotracheal suctioning is not appropriate for this patient. Excessive suctioning can cause increased ICP and should be done cautiously.
D. Ensuring proper ventriculostomy transducer levels is critical for accurate measurement of ICP.
E. Elevating the head of the bed 30° helps improve venous drainage and reduces ICP.
Correct Answer is D
Explanation
A. Unable to discriminate words and letters is associated with left hemisphere damage, which is more linked to language and communication deficits.
B. Deficits in the right visual field would typically occur with left hemisphere damage, which affects vision.
C. Motor retardation is more often associated with left hemisphere damage affecting motor control.
D. Right cerebral hemisphere damage often results in behavioral changes, such as poor impulse control, lack of awareness of deficits (anosognosia), and changes in emotional responses.
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