Brain Injury - Intracranial Pressure Flashcards
What occurs if the CPP is less than 40?
Ischemia & infarction of brain tissue may occur
What are the components that comprise the cranial content
Brain tissue
CSF
Blood
What is the Monro-Kellie Hypothesis?
That if one of the components of cranial content changes then one or both of the others compensate for it.
What does the cranial content equal?
Icp
What is an increased icp often associated with?
Proliferating lesion - either a tumor or hemorrhage
Which component of the cranial contents is easiest to displace?
CSF
What is the first compliance that occurs when there’s an increased ICP?
Displacement and or reabsorption of CSF
What is the second compliance of increased icp?
Decrease in blood flow to brain. Can cause hypoxia
What is the final consequence of increase icp?
Compression and displacement of brain tissue through the foremen magnum which leads to death
What is the cushing’s reflex triggered by?
Ischemia to brain
What is the cushing’s traid?
Widening pulse pressure
Reflective bradycardia
Irregular breathing
What causes a hematoma?
A hemorrhage from vascular trauma
What do bleeding and hematomas in the cranium result in?
Increased icp
Who are hemorrhage sand hematomas most commonly present in?
Individuals >50
What happens to neural function from hematomas and hemorrhage?
Loss of neural function in the affected area of the brain leads to affected target area in body
