外科学教学课件：Increased Intracranial Pressure.ppt

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NEUROSURGERY
IncreasedIntracranialPressure
(IncreasedICP,RaisedICP,IntracranialHypertension)
IncreasedIntracranialPressure
Ⅰ、Anatomy
Ⅱ、RegulationofICP
Ⅲ、IncreasedIntracranialPressure
Ⅳ、Pathogenesis
Ⅴ、ClinicalSymptomsandSigns
Ⅵ、DiagnosisofIncreasedIntracranialPressure
Ⅶ、EffectsofIncreasedIntracranialPressure
Ⅷ、Treatment
Ⅸ、Brainherniation
Ⅰ、Anatomy---Thecranialcavity
Thecranialcavity:closedcontainer/poorlydistensible
Threeintracranialcontents
(incompressible)
cerebralblood
(2-10%、75ml)
CSF
(8-10%、75ml)
braintissue
(80%、1400ml)
Ⅰ、Anatomy---Thecranialcavity
Ⅰ、Anatomy---CirculationofCSF
Circulationinventricularsystem
Arachnoidgranulation
Superior
sagittalsinus
Aqueduct
Choroidplexus
(vessels)
The4thventricle
Subarachnoidspaces
Ⅰ、Anatomy---CirculationofCSF
500ml/dandkeephomeostasis
DefinitionofICP
IntracranialPressure(ICP)
ICPisthepressureinsidethecranialcavity,createdbythetotalvolumeoftheintracranialcontentsexertingoncranialwall.
NormalvalueofICP:
Adults:70~200mmH2O(~)
Children:50~100mmH2O(~)
NormalICPhassmallfluctuationsduetorespirationandcardiacpulse.
Cankeephomeostasis
(stablestate)