Increased Intracranial Pressure (ICP) || A+ Verified Already.
ICP components correct answers -brain tissue 1400 grams.
-blood 75 m L.
-CSF 75 m L.
Volume & pressure of these 3 components are usually in a state of equilibrium.
ICP is usually measured in correct answers lateral ventricles of the brain
Normal ICP pressure correct answers 0-10 mm Hg
Highest normal ICP correct answers 15 mm Hg
Monro-Kellie hypothesis states that correct answers because of the limited space for expansion
within the skull, an increase in any one the components causes a change in the volume of others
Because brain tissue has limited space to expand, ICP compensation is accomplished by correct
answers -displacing or shifting CSF
-increase absorption or decrease CSF production
-decrease cerebral blood volume
Compensation to correct ICP occurs to prevent correct answers increased ICP
Minor changes in blood & CSF volume occur as a result of correct answers Changes in
intrathoracic pressure such as: coughing, sneezing, or straining; changes in posture, changes in
Blood pressure, or changes in systemic oxygen and CO2 levels
Elevated ICP results from correct answers Head injury - which is most common.
Secondary changes in response to: brain tumors,subarachnoid hemorrhage, or
, toxic & viral encephalopathies.
Increased ICP from any cause = correct answers Decreased cerebral perfusion which
stimulates further edema and
possible brain tissue shift resulting in herniation which is frequently fatal.
Increase ICP may reduce cerebral blood flow, resulting in correct answers ischemia & cell death
In early stages of cerebral ischemia, vasomotor centers are stimulated causing correct answers
Increased systemic BP to maintain cerebral blood flow, slow bounding pulse, or irregular
respirations.
*These changes may suggest increased ICP.
Increased Partial Pressure of Oxygen causes: correct answers Cerebral vasodilation, leading to
increased cerebral blood flow & increased ICP.
A Decrease in the partial pressure of oxygen causes: correct answers Vasoconstriction: which
reduces blood flow to brain, a decrease in venous outflow which may also increase cerebral
blood volume, thus further increasing ICP.
Autoregulation correct answers the brain's ability to change the diameter of its blood vessels to
maintain a constant cerebral blood flow during alterations in systemic blood pressure
Cerebral edema = correct answers An increase in brain tissue volume which leads to an increase
in ICP.
Cerebral edema compensatory mechanisms include: correct answers Autoregulation and decrease
in
production & flow of CSF.
ICP components correct answers -brain tissue 1400 grams.
-blood 75 m L.
-CSF 75 m L.
Volume & pressure of these 3 components are usually in a state of equilibrium.
ICP is usually measured in correct answers lateral ventricles of the brain
Normal ICP pressure correct answers 0-10 mm Hg
Highest normal ICP correct answers 15 mm Hg
Monro-Kellie hypothesis states that correct answers because of the limited space for expansion
within the skull, an increase in any one the components causes a change in the volume of others
Because brain tissue has limited space to expand, ICP compensation is accomplished by correct
answers -displacing or shifting CSF
-increase absorption or decrease CSF production
-decrease cerebral blood volume
Compensation to correct ICP occurs to prevent correct answers increased ICP
Minor changes in blood & CSF volume occur as a result of correct answers Changes in
intrathoracic pressure such as: coughing, sneezing, or straining; changes in posture, changes in
Blood pressure, or changes in systemic oxygen and CO2 levels
Elevated ICP results from correct answers Head injury - which is most common.
Secondary changes in response to: brain tumors,subarachnoid hemorrhage, or
, toxic & viral encephalopathies.
Increased ICP from any cause = correct answers Decreased cerebral perfusion which
stimulates further edema and
possible brain tissue shift resulting in herniation which is frequently fatal.
Increase ICP may reduce cerebral blood flow, resulting in correct answers ischemia & cell death
In early stages of cerebral ischemia, vasomotor centers are stimulated causing correct answers
Increased systemic BP to maintain cerebral blood flow, slow bounding pulse, or irregular
respirations.
*These changes may suggest increased ICP.
Increased Partial Pressure of Oxygen causes: correct answers Cerebral vasodilation, leading to
increased cerebral blood flow & increased ICP.
A Decrease in the partial pressure of oxygen causes: correct answers Vasoconstriction: which
reduces blood flow to brain, a decrease in venous outflow which may also increase cerebral
blood volume, thus further increasing ICP.
Autoregulation correct answers the brain's ability to change the diameter of its blood vessels to
maintain a constant cerebral blood flow during alterations in systemic blood pressure
Cerebral edema = correct answers An increase in brain tissue volume which leads to an increase
in ICP.
Cerebral edema compensatory mechanisms include: correct answers Autoregulation and decrease
in
production & flow of CSF.
