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Med Neuro Lect11

Med Neuro Lect11 Subdural Hemorrhages

QuestionAnswer
Where does a subdural hematoma occur? B/w the Inner Dural layer and the membranous arachnoid layer.
Ruptures in what vessels will cause a subdural hematoma? Cerebral veins which pass thru membranous arachnoid and inner dura to empty into sinuses.
What can cause a subdural hematoma? 1.Trauma. 2.Rapid Movements. **Inc risk with engorged veins.
What herniations can a subdural hematoma cause? What are the effects of each? 1.Cingulate herniation about falx cerebri (contusions causing behavioral changes). 2.Thalamic herniation about falx cerebri (midline shift). 3.Uncal herniation about tentorium cerebelli (compressing brainstem & CN III). **Same as EPIdural.
Why doesn't the subdural hematoma present the same as epi with a lens-shape on a CT scan? What does it look like instead? B/c it is b/w the dura-arachnoid space, the only 2 things confining it are: 1.Falx Cerebri at the midline, 2.Tentorium. **Will look HALF-MOON shaped on CT.
What does a stright line in the fluid of a CT scanned subdural hematoma represent? Fluid-Fluid interaction where the formed elements have settled to the bottom and only plasma remains at the top.
Can a subdural hematoma appear to have a lens-shape? YES, but it usually wont be located directly over the temporal bone like the epidural hematoma will.
Difference b/w Acute and Chronic Subdural hematoma? ACUTE (trauma): rapid bleeding, as dangerous as epidural. CHRONIC (elderly/alcholics): torn veins from a rapid head movement, takes hours to days to develop.
Symptoms in a patient with a subdural hematoma 1.Head Aches. 2.Cognitive impairment/ confussion.
Created by: WeeG
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