A client with increased intracranial pressure has a cerebral perfusion pressure (CPP) of 40 mm Hg. This CPP reading is considered:
Low.
Inaccurate.
Within normal limits.
High.
The Correct Answer is A
Choice A rationale
A cerebral perfusion pressure (CPP) of 40 mm Hg is considered low, as the normal range for CPP is typically between 60 and 80 mm Hg. Low CPP can lead to inadequate blood flow to the brain.
Choice B rationale
An accurate CPP reading is crucial for assessing intracranial pressure and cerebral blood flow. A reading of 40 mm Hg is not typically considered inaccurate.
Choice C rationale
A CPP of 40 mm Hg is not within normal limits, as it is significantly below the normal range.
Choice D rationale
A CPP of 40 mm Hg is not high; it is considered low and requires medical attention.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Choice A rationale
Cerebrospinal fluid (CSF) does not produce cerebral neurotransmitters. Neurotransmitters are produced by neurons in the brain and nervous system.
Choice B rationale
CSF acts as a barrier, but its primary role is not to protect against bacteria. It provides mechanical protection and removes waste, though some antibacterial properties exist.
Choice C rationale
CSF does not act as an insulator for temperature. It primarily serves as a cushioning agent and helps maintain homeostasis, but not temperature insulation.
Choice D rationale
CSF cushions the brain and spinal cord by providing a fluid buffer that absorbs shock. It protects these structures from trauma by creating a supportive and stable environment within the cranial and spinal cavities.
Correct Answer is B
Explanation
Choice A rationale
Normal posture involves relaxed and symmetrical positioning of the limbs without any abnormal flexion or extension.
Choice B rationale
Decorticate posturing is characterized by abnormal flexion of the upper extremities at the elbows and wrists, and extension of the lower extremities, often indicating damage to the corticospinal tract.
Choice C rationale
Decerebrate posturing involves extension and outward rotation of both the arms and legs, indicating damage to the brain stem, which is more severe than decorticate posturing.
Choice D rationale
Flaccid posture refers to a complete lack of muscle tone and resistance, often seen in severe cases of neurological damage or after a stroke. .
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