Term
| define: periorbital cellulitis (AKA) |
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Definition
| AKA preseptal cellulitis: infection of the eyelid and surrounding skin anterior to the orbital septum |
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Term
| define: orbital cellulitis (AKA) |
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Definition
| AKA postseptal cellulitis: infection of orbital tissues posterior to orbital septum |
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Term
| pre & post septal cellulitis are more common in: |
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Definition
| children; avg age of orbital cellulitis is 7.5 |
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Term
| which is more common pre or postseptal cellulitis? |
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Definition
| preseptal is more common (96%) |
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Term
| which is more severe? pre or postseptal cellulitis |
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Definition
| postseptal is more severe |
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Term
| preseptal cellulitis etiology: |
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Definition
| source is from previous infection or nearby trauma |
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Term
| orbital cellulitis eitology |
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Definition
| extension from infection of adjacent sinuses; especially from the ethmoid sinuses |
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Term
| which cellulitis, pre or postseotal, involves changes in visual acuity? |
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Definition
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Term
| 3 clinical presentations for preseptal cellulitis. |
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Definition
redness/swelling of eyelids
tenderness/pain
fever |
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Term
| presentations of orbital cellulitis |
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Definition
| same as preseptal + proptosis, decreased extraoccular movements, decreased vision, diplopia |
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Term
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Definition
| bulging of the eye anteriorly out of the orbit |
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Term
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Definition
| visual impairment in which an object is seen as two objects |
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Term
| why is it difficult to identify causitive organisms in pre/postseptal cellulitis? |
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Definition
| due to presence of normal flora |
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Term
| what would CBC show in postseptal cellulitis? |
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Definition
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Term
| which labs should be drawn on postseptal cellulitis patients? |
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Definition
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Term
| what are the causative organisms of postseptal cellulitis? |
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Definition
those of sinusitis and skin infections:
S. pneumo, S. aereus, M. cat, H. influ, Anaerobes, other streps |
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Term
| 5 major complications of orbital cellulitis |
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Definition
| localized abcess, vision loss, meningitis, cavernous sinus thrombosis, brain abcess |
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Term
| which patients require hospitalized treatment for pre/postseptal cellulitis |
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Definition
preseptal: patients <1yr and all severe cases
postseptal cellulitis: all cases with IV antibiotics |
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Term
| when might surgery be required for postseptal cellulitis? |
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Definition
| surgery required for abcess drainage & culture |
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Term
| why is it essential to differentiate btwn preseptal and orbital cellulitis? |
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Definition
| orbital cellulitis is assoc. w visual loss, severe complications and even death |
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Term
| Name 3 red flags for orbital cellulitis: |
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Definition
1. proptosis
2. vision changes
3. decreased extraoccular eye movements |
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Term
| when should you assume that the injury from a foreign body is intraocular? |
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Definition
| when it is a high velocity injury |
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Term
| what is the weakest poin of the eye where a globe rupture can occur? |
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Definition
| limbus: where the occular nerve meets the eye |
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Term
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Definition
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Term
| 3 presentations of a blowout fracture |
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Definition
1. edema and ecchymosis of lid tissues
2. restriction of occular motility(esp virtical movements
3. hypoesthesia (decreased sensitivity) of the ipsilateral cheek due to intrapment of the infraorbital nerve |
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Term
| in chemical burns of the eye, which is more severe acid or base? |
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Definition
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Term
| treatment of chemical burns of the eye |
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Definition
| neutralize with lots of water, extensice injury may require corneal transplant |
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Term
| can we suture traumas involving the eyelid? |
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Definition
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