When the patient has a rapidly growing brain tumor, what slows expansion of cerebral brain tissue into the adjacent hemisphere?

Ventricles

Falx cerebri

Arachnoid layer

Tentorium cerebella

Answer and Explanation

The Correct Answer is B

Brain tumors that grow rapidly can compress or displace surrounding structures. The falx cerebri is a rigid fold of dura mater that separates the two cerebral hemispheres and acts as a barrier to tumor expansion across the midline. This dural structure temporarily slows tumor spread into the opposite hemisphere, although pressure can eventually cause midline shift or herniation. Understanding the role of intracranial anatomy is important in predicting tumor progression and complications.

Rationale for correct answer:
B. Falx cerebri: A strong dural fold that separates the cerebral hemispheres. It limits early tumor expansion across the midline until pressure forces tissue displacement.

Rationale for incorrect answers:

A. Ventricles: These structures contain CSF and may become compressed but do not block tumor growth. Tumor expansion can eventually distort or obstruct them, leading to hydrocephalus.

C. Arachnoid layer: A thin meningeal membrane that encloses the subarachnoid space. It is not structurally strong enough to prevent tumor spread.

D. Tentorium cerebelli: This dural fold separates the cerebrum from the cerebellum. It limits downward expansion, not horizontal spread between hemispheres.

Take home points

The falx cerebri provides a temporary barrier to tumor growth across hemispheres.
Ventricles and meninges do not significantly resist tumor expansion.
Anatomical barriers influence tumor progression and patterns of brain herniation.

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Free Nursing Study Resources

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

Explanation

Increased intracranial pressure (ICP) occurs when the volume of brain tissue, blood, or cerebrospinal fluid rises within the rigid skull. This condition leads to impaired cerebral perfusion, which can quickly progress to brain herniation if unaddressed. Early recognition of signs and symptoms is critical for preventing permanent neurological damage. Common early findings include changes in mental status, behavioral changes, headache, and pupil abnormalities, which reflect pressure on brain tissue and cranial nerves.

Rationale for correct answers:

A. Disoriented to time and place: Confusion and disorientation are early indicators of cerebral hypoperfusion. They reflect rising ICP affecting the cerebral cortex.

B. Restlessness and irritability: These are early behavioral changes caused by decreased cerebral oxygenation and pressure on brain tissue. They often precede more severe neurological deterioration.

C. Unequal pupils: Indicates pressure on cranial nerve III or brain herniation risk. Pupil asymmetry is a critical neurologic warning sign.

E. Headache: A common manifestation of stretching meninges and pressure changes. It often worsens with coughing, straining, or position changes.

Rationale for incorrect answer:
D. ICP 15 mmHg: Normal ICP ranges from 10–15 mmHg, so 15 is at the upper limit but not elevated. Clinically significant ICP is typically >20 mmHg.

Take home points

Early signs of ICP increase include confusion, restlessness, headache, and pupil changes.
Unequal pupils are an emergency indicator of possible herniation.
ICP is considered elevated above 20 mmHg, requiring prompt intervention.

A. keep the head of the bed flat. B. elevate the head of the bed to 30 degrees. C. maintain patient on the left side with the head supported on a pillow. D. use a continuous-rotation bed to continuously change patient position.

Correct Answer is B

Explanation

Positioning is a critical intervention for clients with increased intracranial pressure (ICP) to promote venous drainage from the brain without compromising cerebral perfusion. Elevating the head of the bed (HOB) to 30 degrees optimizes venous outflow, reduces ICP, and helps prevent further cerebral edema. Extreme flexion or rotation of the head should be avoided, as these positions can impede venous return and worsen pressure. Proper positioning is a first-line nursing intervention in ICP management.

Rationale for correct answer:
B. Elevate the head of the bed to 30 degrees: This position facilitates cerebral venous drainage while maintaining adequate cerebral perfusion. It is the recommended standard for clients with increased ICP.

Rationale for incorrect answers:

A. Keep the head of the bed flat: Flat positioning can increase ICP by reducing venous outflow from the brain. This position is generally avoided unless specifically ordered for procedures like lumbar puncture.

C. Maintain patient on the left side with the head supported on a pillow: Lateral positioning may cause neck flexion and impaired venous return. Side-lying does not optimize ICP reduction.

D. Use a continuous-rotation bed: Frequent or continuous rotation can cause spikes in ICP. This therapy is reserved for preventing pulmonary complications, not for ICP management.

Take home points

HOB elevated 30 degrees is the safest and most effective position for ICP reduction.
Avoid neck flexion, extreme rotation, or flat positioning, as these can worsen ICP.
Positioning is a noninvasive, first-line nursing intervention to protect the brain.

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When the patient has a rapidly growing brain tumor, what slows expansion of cerebral brain tissue into the adjacent hemisphere?

Nursing Test Bank

Naxlex Comprehensive Predictor Exams

A nurse is completing an assessment of a client who has increased intracranial pressure. Which of the following are expected findings? (Select all that apply.)

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

Explanation

A nurse plans care for the patient with increased intracranial pressure with the knowledge that the best way to position the patient is to

Correct Answer is B

Explanation

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