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 71 year-old piranha farmer 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 165 mmHg and his intracranial pressure is 80 mmHg, what is his cerebral perfusion pressure?

 
        A) 85 mmHg
 
        B) 15 mmHg
 
        C) 40 mmHg
 
        D) 35 mmHg
 
        E) 45 mmHg
 

 


Back to the question = Go back to the top of the page.
See another question like this one = Reload a different version of this question ().
Click here for a random question = Load a random question from the database.
Clone this question = Use this question as a template to create a totally NEW question.
Rate this question = Enter detailed rating for this question!
Average user rating for this question = 4 = 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) 85 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 = 165mmHg, and ICP =80 mmHg. Solving for CPP, 165 - 80 = 85 mmHg.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 4
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




B) 15 mmHg

This answer is incorrect.


CPP = MAP - ICP.

Refer to the correct answer for further explanation.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 4
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




C) 40 mmHg

This answer is incorrect.


CPP = MAP - ICP.

Refer to the correct answer for further explanation.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 4
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




D) 35 mmHg

This answer is incorrect.


CPP = MAP - ICP.

Refer to the correct answer for further explanation.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 4
Please log in if you want to rate questions.

 

 

 

 

 

 

 

 

 




E) 45 mmHg

This answer is incorrect.


CPP = MAP - ICP.

Refer to the correct answer for further explanation.  (See References)

Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 4
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.
Back to the questionSee another question like this oneClick here for a random questionClone this question Rate this questionAverage user rating for this question = 4
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

User Comments About This Question:

0 user entries
Please log in if you'd like to add a comment.