What is the consequence of low cerebral perfusion pressure?
Ischemia and neuronal death
Improved cognitive function
Increased blood flow to the brain
undetectable intracranial glucose levels
The Correct Answer is A
A. Ischemia and neuronal death – Cerebral perfusion pressure (CPP) is the pressure needed to ensure adequate blood flow to the brain. If CPP drops too low, the brain doesn't receive enough oxygen and glucose, leading to ischemia and eventually neuronal death.
B. Improved cognitive function – Low CPP results in decreased oxygen and nutrient delivery, which impairs cognitive and neurological function.
C. Increased blood flow to the brain – Low CPP means reduced blood flow, not increased.
D. Undetectable intracranial glucose levels – While glucose delivery may decrease, levels are not necessarily undetectable and this is not the primary concern with low CPP.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Trendelenburg position (head lower than feet) can increase intracranial pressure and is contraindicated.
B. Continuous rotation may increase ICP due to frequent position changes and is generally avoided.
C. Elevating the head of the bed to 30 degrees promotes venous drainage from the brain, helping reduce intracranial pressure while maintaining cerebral perfusion.
D. Keeping the head flat can impair venous drainage and increase ICP.
Correct Answer is D
Explanation
A. Furosemide typically causes hypokalemia (low potassium), not hyperkalemia.
B. There is no such thing as a potassium allergy; this statement is incorrect.
C. Furosemide does not increase potassium levels; it promotes potassium excretion.
D. Furosemide is a loop diuretic that increases the excretion of potassium in urine, so patients often require potassium supplementation to prevent hypokalemia.
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