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Med Neuro Lect10
Med Neuro Lect10 Epidural Hematomas
Question | Answer |
---|---|
Does the outer dura, creating the periosteum, cover the inside or outside of the calvarium? | BOTH |
Damage to which arteries will create an epidural bleed | Ant, Mid, Post Meningeal Arteries. |
Where does an epidural hemorrhage occur? | B/w the inner table of the calvarium and the periosteum. **BL will accumulate and push the dura off the bone (this takes considerable amount of pressure). |
3 main problematic herniation areas resulting from a Epidural Hematoma? damage resulting from each | 1.Cingulate gyrus under falx cerebri:contusions will cause behavioral changes. 2.Thalamic shift under falx cerebri: MIDLINE SHIFT. 3.Uncal (medial aspect of parahippocampus) herniation around tentorium cerebelli: compression of brainstem (lethal) & CN 3 |
3 things to look for on a CT scan for a EPIdural Hematoma? | 1.Lens-shaped hematoma. 2.Midline shift (asymmetrical ventricles). 3.Flattened GYRI on OPPOSITE side. |
What does swirled lens-shaped hematoma on a CT scan indicate? | Intermitten bleeding (not all of it is fresh, only the really white fluid is fresh BL). |
Why does the hemorrhage remain confined to the the lens shaped region? | Due to the dura's firm attachment to the inner table of calvarium at the frontal and occipital pole. |
What type of herniation is occuring when the cingulate gyrus is pushed under the falx cerebri? what kind of cerebral changes will this bring about? | Subfalcine herniation. Behavioral changes |