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Cavernous sinus
1.
2.
3. 2 cms long 1 cm wide
Situated in middle cranial fossa on the sides of
body
of sphenoid
Anterior – sup. Orbital fissure
Posterior - Apex of petrous temp. bone
Floor & medial wall – endosteal layer of dura
Roof & lateral Wall - meningeal layer of dura
CAVERNOUS SINUS
4. Structure passing through
1. Int. carotid surrounded by venous and
sympathetic plexuses
2. Abducent N. (Inf. lat. to carotid art.)
Structures in lateral wall
1. Oculomotor N.
2. Trcochlear N.
3. Ophthalmic N.
4. Maxillary N.
22. Cavernous sinus thrombosis
Cause: Sepsis dangerous area of face,
paranasal sinuses,
nasal cavities
Neurological – severe pain eye anf forehead
Ophthalmic n.
Paralysis of ocular muscles –
- 3rd
, 4th
and 6th
n.
Venous block – oedema of eye lids, cornea, nose
exophthalmos
Injury causing communication between cavernous
sinus and carotid leads to pulsating exophthalmos