Orbital Cellulitis: Pathogenesis and Clinical Findings
Definitions:
a. ...
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Orbital Cellulitis: Pathogenesis and Clinical Findings

Definitions:

a. Chemosis: Edema of the bulbar conjunctiva

b. Panopthalmitis: inflammation of all coats of the eye including intraocular structures.

c. Endopthalmitis: inflammation of the interior of the eye.

 • Spreads to periorbital tissue (anterior to the orbital septum) -> Localized inflammation -> Conjunctival chemosis -> Eyelid and periorbital edema -> Pain on palpation -> Induration, Warmth

 • Inflammation of orbital tissue

     - Impinges on ocular muscles -> Impaired extra-ocular movements -> Pain with eye movement or opthalmoplegia

     - Impinges on nerves -> Afferent pupillary defect -> Decreased visual acuity

     - Proptosis -> Exposes cornea -> Corneal drying and scarring

 • Spreads to surrounding structures -> Subperiosteal abscess -> Brain abscess -> Cavernous sinus thrombosis -> Meningitis -> Subdural empyema -> Orbital abscess

 • Involves the orbit -> Panopthalmitis -> Endopthalmitis -> Blindness



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The Calgary Guide to Understanding Disease
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Account created for The Calgary Guide to Understanding Disease - Linking pathophysiology to clinical presentation - http://calgaryguide.ucalgary.ca/
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