ICP Flashcards
what is autoregulation?
the brain regulates its own blood flow in response to its metabolic needs despite wide fluctuation in systemic arterial BP.
What is an Epdirual?
Understand where they occur, and s/sx of them
subdural
purpose of autoregulation?
Ensure a consistent CBF to provide for the metabolic needs of brain tissue and maintain cerebral perfusion pressure within normal limits.
what is Cerebral blood flow? (CBF)?
amount of blood passing through brain tissue in 1 minute.
what is Cerebral perfusion pressure? (CPP)
the amount of pressure required to get sufficient amount of blood to brain, maintain cerebral blood flow.
between 60-100 mmHg
maintain blood flow
MAP range
60-100 mmHg
what is MAP?
pressure in artery during 1 cardiac cycle
Cerebral edema in relationship to causing an increase in ICP?
cerebral edema is an increased accumulation of fluid in extra-vascular spaces of brain tissue.
3 types of cerebral edema
vasogenic, cytotoxic and interstitial
what is vasogenic cerebral edema?
- occurs around the white matter
- leakage from capillaries into surrounding extracellular spaces.
Vasogenic symptoms
ranges from HA to decrease consciousness, including COMA.
Cytotoxic edema
in which extracellular water passes into cells, resulting in their swelling.
interstitial edema
usually a result of hydrocephalus (a buildup of fluid in the brain)
