NURS 3444 Lecture Notes - Lecture 11: Cerebral Perfusion Pressure, Intracranial Pressure, Cerebrospinal Fluid
Document Summary
Increased intracranial pressure (icp) through level of consciousness. Flow of spinal fluid goes through the brain, circulates through all ventricles and circles back confusion, delirium, lethargy, stupor, coma intracranial pressure cerebral perfusion pressure. Amount of pressure needed to ensure adequate oxygen and nutrients. Pressure exerted by brain tissue, cerebrospinal fluid within the cranial vault. Pressure exerted by brain tissue, cerebral spinal fluid and blood within the cranial vault. Cerebral perfusion pressure needed for o2 and nutrients. Mature bbb has tight junctions w/o pores so impermeable to. Blood (10%) affected delivered by the blood to the brain when icp reduces total volume and cerebral blood flow - regulated by autoregulation to remain constant, except in infants increase cp reduces blood flow protein and many substances. Bbb of fetus & newborn more permeable blood flow. Brain is dependent on glucose for energy- thus prone to damage (or seizures) if severe hypoglycemia occurs. Sun setting eyes = pushing eyes down.
