A nurse is taking care of a client who has sustained a neurologic injury with increased intracranial pressure and decreased cerebral perfusion. Which of the following will keep cerebral perfusion pressure constant?
Regulation of constriction and dilation of blood vessels in the brain
Regulation of catecholamines circulating throughout the body
Regulation of the amount of carbon dioxide exhaled
Regulation of how much blood is pumped from the heart
The Correct Answer is A
A. The constriction and dilation of blood vessels in the brain helps maintain appropriate cerebral blood flow and cerebral perfusion pressure (CPP) despite fluctuations in blood pressure.
B. Catecholamines regulate other systemic body functions, but they do not directly impact cerebral perfusion pressure.
C. Carbon dioxide exhalation can affect blood flow, but the primary regulation of CPP is through blood vessel constriction and dilation.
D. The amount of blood pumped from the heart can impact overall blood pressure but does not directly regulate cerebral perfusion pressure.
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Related Questions
Correct Answer is A
Explanation
A. A Glasgow Coma Scale score of 6 indicates a severe impairment of consciousness, and the client would require total nursing care.
B. A score of 6 does not indicate the client is alert and oriented. The client has a decreased level of consciousness.
C. A score of 6 does not suggest a deep coma. The client is in a moderate state of impaired consciousness.
D. A score of 6 indicates significant neurologic compromise, not stable neurologic status.
Correct Answer is A
Explanation
A. Blepharitis is an inflammation of the eyelid margin causing symptoms such as itching, irritation, light intolerance, and crusting.
B. Retinal detachment involves sudden visual disturbances such as flashes of light or a curtain-like shadow, not itching or crusting.
C. Allergic conjunctivitis involves redness, itching, and watery discharge, not crusty debris on the lid margins.
D. Cataracts lead to blurred vision and glare, not irritation or crusting.
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