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   Acute Sinusitis Muhammad Azwan Syemi Asyran Muhammad Hanis  Acute Sinusitis Definition 4 paranasal sinuses, each lined with pseudostratified ciliated columnar epithelium and goblet cells  Frontal  Maxillary  Ethmoid  Sphenoid  Infectious or noninfectious inflammation of 1 or more sinuses  Sinusitis Classification  Definitions  Acute  Sx & signs of infectious process < 3 weeks duration  Subacute  Sx & signs 21 to 60 days  Chronic  > 60 days of sx & signs  Or, 4 episodes of acute sinusitis each > 10 days in a single year  Sinusitis Pathogenesis ƒ Basic cause is osteomeatal complex (the middle meatal region & the frontal, ethmoid, & maxillary sinus ostia there) inflammation & infection  – Sinus ostia occluded  – Colonizing bacteria replicate  – Ciliary dysfunction  – Mucosal edema  – Lowered PO2 & pH
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