What is the function of cerebrospinal fluid (CSF)?

It produces cerebral neurotransmitters.

It acts as a barrier to bacteria.

It acts as an insulator to maintain a constant spinal fluid temperature.

It cushions the brain and spinal cord.

Answer and Explanation

The Correct Answer is D

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 provides a protective barrier to some extent, but its primary function is not to act as a barrier to bacteria. The blood-brain barrier primarily serves this function.

Choice C rationale

CSF helps maintain a stable environment in the central nervous system but is not primarily an insulator for maintaining constant temperature. Its thermal properties are secondary.

Choice D rationale

The primary function of CSF is to cushion and protect the brain and spinal cord from mechanical injury. It also helps maintain the brain's buoyancy and provides a stable environment for the central nervous system.

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Correct Answer is ["A","B","C"]

Explanation

Choice A rationale

Bradycardia (slow heart rate) is one of the key components of Cushing's triad, which indicates increased intracranial pressure and impending herniation.

Choice B rationale

Bradypnea (slow respiratory rate) is another manifestation of Cushing's triad and reflects brainstem compression.

Choice C rationale

Hypertension (high blood pressure) is the third component of Cushing's triad, resulting from the body's attempt to maintain cerebral perfusion.

Choice D rationale

Tachycardia (rapid heart rate) is not a sign of Cushing's triad and is not associated with increased intracranial pressure.

A. Administer a bolus of normal saline as prescribed. B. Administer bronchodilators as prescribed and monitor the client's LOC. C. Increase the client's bed height and reassess in 30 minutes. D. Inform the care team and assess for further signs of possible increased ICP.

Correct Answer is D

Explanation

Choice A rationale

Administering a bolus of normal saline addresses fluid volume but does not directly address the respiratory effort increase or potential increased ICP, which is the most concerning aspect of the head injury.

Choice B rationale

Administering bronchodilators and monitoring LOC may help with respiratory issues but does not address the underlying problem of increased ICP, which could be causing the increased respiratory effort.

Choice C rationale

Increasing the client's bed height and reassessing in 30 minutes might temporarily help, but it is not the most immediate and appropriate intervention. The client’s symptoms suggest a more urgent issue.

Choice D rationale

Informing the care team and assessing for further signs of increased ICP is crucial. Increased respiratory effort in a client with head injury can indicate rising intracranial pressure, which requires immediate medical attention to prevent further complications.

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What is the function of cerebrospinal fluid (CSF)?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

Which signs are manifestations of the Cushing triad? Select all that apply.

Correct Answer is ["A","B","C"]

Explanation

The nurse is caring for a client who sustained a moderate head injury following a bicycle accident. The nurse's most recent assessment reveals that the client's respiratory effort has increased. What is the nurse's most appropriate action?

Correct Answer is D

Explanation

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The nurse is caring for a client who sustained a moderate head injury following a bicycle accident. The nurse's most recent assessment reveals that the client's respiratory effort has increased. What is the nurse's most appropriate action?