What is the normal range for intracranial pressure (ICP)?
20-30 mmHg
40-50 mmHg
50-100 mmHg
5-15 mmHg
The Correct Answer is D
A. 20-30 mmHg is above the normal range and indicates elevated ICP, which can be dangerous.
B. 40-50 mmHg is critically high and requires urgent medical intervention.
C. 50-100 mmHg is dangerously high and not compatible with normal brain function.
D. Normal intracranial pressure ranges from 5 to 15 mmHg. Values within this range indicate normal pressure within the skull, allowing for proper brain perfusion and function.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Specific gravity changes relate to kidney function and hydration status, not directly to right-sided heart failure.
B. Heparin levels are related to anticoagulation therapy, not heart failure status.
C. BNP levels decrease when heart failure improves; decreased BNP is not expected in acute heart failure.
D. BNP is released in response to ventricular stretch and volume overload; it increases in acute heart failure as the heart struggles to manage fluid overload.
Correct Answer is B
Explanation
A. Increased systemic blood pressure – While systemic vasoconstriction may occur to maintain perfusion, it is a result of compensatory mechanisms like RAAS, not a primary mechanism leading to fluid retention and edema.
B. Renin-angiotensin-aldosterone activation – RAAS leads to:
Sodium and water retention via aldosterone
Vasoconstriction via angiotensin II
These changes increase intravascular volume, contributing to fluid overload and edema.
C. Ventricular hypertrophy – This is a structural adaptation to increased workload (pressure overload), not directly responsible for fluid retention.
D. Ventricular dilation – Dilation occurs as a result of chronic volume overload, not as a compensatory mechanism causing fluid retention.
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