Ongoing...
Cerebral blood flow
CBF values (cc/g/min)
Usual 50
Normal variation 50-125
< 50 hypoperfusion
< 22 loss of function
< 10 infarct
Cerebral autoregulation curve
- CBF versus MAP
- between MAP 50–150 mmHg, CBF remains constant via vasoconstriction or vasodilation
> at extremes, compensatory mechanisms fail leading to cerebral ischemia or vasogenic edema
