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10 Cards in this Set
- Front
- Back
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Contents of the Posterior Fossa?
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Foramon Magnum
Jugular Foramon Clinoid Process (CP) CN 3-12 (ant to post) Tentorium cerebelli --(Cerebellum, Brainstem, 4th V, CN nuclei, Vertebrabasilar section of c.o.w.) |
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Contents of middle fossa?
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Foramon Ovale,
Temporal Lobe Pituitary Dorsum Sellac |
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Contents of Anterior Fossa?
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Frontal lobe,
optic foramon Lesser wing of sphenoid |
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What are some of the potential problems when performing a craniotomy for a mass in the Posterior Fossa?
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Obstructive hydrocephalus
Vital brain stem center injury unusual positioning postural hypotension Venous Air embolism |
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________________located masses can obstruct flow of CSF at the level of the fourth Ventricle or the cerebral aquaduct.
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Infratentorially
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Abrupt changes to the blood pressure, heart rate, or cardiac rhthm should alert the anesthesiologist to the possibility of what type of injury during Posterior fossa surgery?
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Damage to the brain stem: such as the respiratory center.
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Acoustic neuromas (vestibular schwannoma) arise from what area?
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vestibular branch of the vestibular-cochlear nerve (CN VIII) accessed via the CP angle
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Treatment for Vestibular schwannomas?
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Stereotactic radiosurgery
Microsurgical resention Posterior Fossa approach (CN IX & X are close here) |
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What are the key procedural complications with posterior fossa surgery for the anesthesia provider?
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1. hemorrhage
2. Brain stem injury 3. Venous air embolism 4. Others: CN VIII- deafness, VII- motor weakness, CSF Leak |
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What neurophysiological monitoring in Vestibular Schwannoma surgery?
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SSEP (monitors brainstem activity)
BAEP (monitors CN VIII) MEP (monitors CN VII) |
