Increased Intracranial Pressure Flashcards
(25 cards)
↑ intracranial bulk →↑ pressure in cranial vault → cerebral hypoxia
Increased intracranial pressure
Increased intracranial pressure definition
↑ intracranial bulk →↑ pressure in cranial vault → cerebral hypoxia
MAP in ICP means?
Mean arterial blood pressure
How do we get mean arterial blood pressure (MAP)?
(SBP + 2DBP)/3
How to get CPP?
MAP - ICP = mmHg
Normal ICP
5 - 15 mmHg
Normal MAP
70 - 100 mmHg
Normal CPP
60 - 100 mmHg
Pressure to maintain blood flow to the brain
Cerebral perfusion pressure (CPP)
Intracranial volumes
Brain, blood, CSF
80% increase in brain volume will result to:
Cerebral tumor, abscess, edema → infection or trauma
Cerebral tumor, abscess, edema can cause
infection or trauma
10% increase in blood volume causes
AV malformation, Cerebral hemorrhage, embolism, thrombosis, aneurysm
(“ACETA”)
10% increase in CSF causes
Obstruction of CSF outflow
Obstruction of CSF outflow causes
Brain tumor, hydrocephalus, choroid plexus tumor
What doctrine talk about,” if one volume ↑, the other two volume compensates by ↓”
Monroe - Kellie doctrine
What is an emergency in increased intracranial pressure? How many minutes will the emergency before it becomes an irreversible brain damage?
Hypoxia
4-6 minutes
Early sign of ↑ intracranial pressure
Adults:
Pedia:
Altered loc (restless, agitated and etc. )
High pitched cry
What happens to eyes when having increase intracranial pressure?
Papilledema (optic nerve swelling)
Pathophysiology:↑ pressure → ↑ congestion → compress optic here
Optic nerve swelling
Papilledema
ICP in midbrain signs:
(-) doll’s eye sign
Decortication
Decerebration
( decorate first before celebrating )
head movement → eyes remain midline or more in same direction
Negative doll’s eye sign
Flexion e of upper extremities, extension of lower extremities
Decortication
Extension of upper extremities, extension of lower extremities
Decerebration
