Infections of the Labyrinth

Infections of the Labyrinth
Presentation lecture by:Elizabeth J. Rosen, M.D. & Jeffery T. Vrabec, M.D.

Labyrinthitis
* Inflammatory process involving the inner ear
o infectious vs. non-infectious
o generalized vs. circumscribed
o acquired vs. congenital
o isolated vs. systemic

Pathogenesis

* Meningogenic
o spread through IAC or cochlear aqueduct
* Tympanogenic
o spread through round or oval windows
* Hematogenic
o spread through vascular channels

Bacterial Infections
* Toxic Labyrinthitis
o sterile inflammation
o bacterial toxins penetrate perilymphatic spaces
o mild hearing loss or mild vestibular loss
o usually resolves without sequelae
* Suppurative Labyrinthitis
o bacterial invasion of the inner ear
o intense inflammatory reaction
o progresses along four pathologic stages
o medical emergency

Suppurative Labyrinthitis
Bacterial Labyrinthitis
Bacterial Meningitis
Audiologic Diagnosis and Follow Up
Syphilis
Viral Infections
Cytomegalovirus
Rubella
Mumps
Measles
Varicella-Zoster
Herpes Simplex
Human Immunodeficiency Virus
Protozoal Infections
Toxoplasmosis
Fungal Infections
Acute Cochlear Labyrinthitis
ISSNHL
Acute Vestibular Labyrinthitis
Conclusion
Case Presentation

Infections of the Labyrinth.ppt