Intracranial Pressure

Question 1

What is the CSF volume?

Answer 1

150mls

Question 2

What is the normal CSF pressure in adults?

Answer 2

<10-15 mmHg

Question 3

What is the Monroe-Kellie Doctrine?

Answer 3

Increase in volume in one of the intracranial constituents must be compensated for by decrease in volume of one of the others

Question 4

What is the relationship between cerebral perfusion pressure and ICP?

Answer 4

CCP = MAP-ICP

Question 5

What is the cushings reflex?

Answer 5

Bradycardia, Systolic hypertension and irregular respirations

Question 6

What is craniosynostosis?

Answer 6

One or more of the sutures of the skull fuse too early causing pressure inside the skull to increase as the brain grows

Question 7

When is an urgent head CT required?

Answer 7

GCS<13 at any point, or <14 2 hours after injury, any seizures or suspected skull fracture (more specifics for over 65s)

Question 8

What can cause hydrocephalus?

Answer 8

Impaired CSF reabsorption or CSF flow obstruction