FrontalCortex, Inc. is a non-profit corporation dedicated to neurology education.

Cerebral blood flow 01

Topic: Pharmacology

Created on Friday, September 15 2006 by

Last modified on Friday, September 15 2006.

A 56 year-old beet washer presents is admitted to the neurosciences ICU after head trauma. Among other interventions, an arterial line and an intraventricular catheter are placed.

If his mean arterial pressure is 85 mmHg and his cerebral perfusion pressure is 15 mmHg, what is his intracranial pressure?

A) 90 mmHg

B) 85 mmHg

C) 70 mmHg

D) 75 mmHg

E) 80 mmHg

	= Go back to the top of the page.
	= Reload a different version of this question ().
	= Load a random question from the database.
	= Use this question as a template to create a totally NEW question.
	= Enter detailed rating for this question!
	= How users like you have rated this question.

This question was created on September 15, 2006 by .
This question was last modified on September 15, 2006.

ANSWERS AND EXPLANATIONS

A) 90 mmHg

This answer is incorrect.

CPP = MAP - ICP.
Refer to the correct answer for further explanation. (See References)


Please log in if you want to rate questions.

B) 85 mmHg

This answer is incorrect.

CPP = MAP - ICP.
Refer to the correct answer for further explanation. (See References)


Please log in if you want to rate questions.

C) 70 mmHg

This answer is correct.

Cerebral perfusion pressure (CPP) is the net pressure of the blood flowing through the brain. It is one of the determinants of cerebral blood flow. CPP must be regulated within narrow limits. If it drops too low, ischemia will result. CPP is defined by the following equation:
CPP = MAP - ICP,
where MAP is mean arterial pressure, and ICP is Intracranial pressure.
In this unfortunate person's case, MAP = 85mmHg, and ICP =70 mmHg. Solving for CPP, 85 - 70 = 15 mmHg. (See References)


Please log in if you want to rate questions.

D) 75 mmHg

This answer is incorrect.

CPP = MAP - ICP.
Refer to the correct answer for further explanation. (See References)


Please log in if you want to rate questions.

E) 80 mmHg

This answer is incorrect.

CPP = MAP - ICP.
Refer to the correct answer for further explanation. (See References)


Please log in if you want to rate questions.

References:

1. Suarez, J.I. (2004). Critical Care Neurology and Neurosurgery. Humana Press, Totowa, New Jersey.


Please log in if you want to rate questions.

FrontalCortex.com -- Neurology Review Questions -- Neurology Boards -- Board Review -- Residency Inservice Training Exam -- RITE Exam Review
pharmacology
Cerebral blood flow 01
Question ID: 69151
Question written by . (C) FrontalCortex.com 2006-2009, all rights reserved. Created: 09/15/2006
Modified: 09/15/2006
Estimated Permutations: 0