click below
click below
Normal Size Small Size show me how
9.AUD-Suppurative OM
Audiology SLP314
Term | Definition |
---|---|
Suppurative OM development | Bacteria enter ME through eus.tube. Infected tube swells shut & prevents drainage. TM and ME mucosa (lining) become infected. Suppuration - pus is produced , accumulates in ME space. More common in kids. |
Two types Supp. OM | Accute (develops and resolves quickly). Chronic (develops slowly and persists) |
Treatment Supp. OM (2) | 1. Antibiotics 3. Pressure equalizing (PE) tubes (child) 2. Myringotomy (adult) |
Complications Supp. OM | 1.Tympanosclerosis on TM, possibly ossicles 2.Ossicular errosion 3.Chronic TM perforation 4.Mastoiditis 5. Facial paralysis 6.Laberynthitis 7.Cholesteatoma |
Laberynthitis | Bacteria get into inner ear through round window or bone covering the horizontal semicircular canal. Causes permanent SNHL, dizziness. |
Cholesteatoma | Cystic mass that grows in ME. Chronic TM perf- skin migrates into ME. Surgical removal necessary |
Tympanosclerosis | Chronic ear disease stimulates increase in number of cells in ear (similar to scar tissue). Forms in the fibrous layer. Rigidity results from excessive accumulation of these cells. If advanced, may cause conductive hearing loss. |
Disorders of ME (3). | Otosclerosis. Ossicular Interruption. Congenital Anomalies. |
Otosclerosis | Abnormal growth of bone, in area of oval window. Soft, spongy bone hardens into dense mass. Causes stapes fixation. More common in women (esp preg) |
Symptoms of Otosclerosis | Gradual conductive loss. Begins unilateral, eventually bilateral. Tinnitus (low or medium pitch. Carhart notch (decrease in bone conduction at 2000 Hz). Shallow type A tympanogram. |
Treatment of Otosclerosis | Stapedectomy (varied success) |
Cochlear otosclerosis | Rare. Spreads inside cochlea, interferes with cochlear function. Severe mixed loss, no cure. |
Ossicular Interruption causes (3) | 1.Head or TM trauma. 2.Chronic OM (erosion). 3.Barotrauma (scuba) |
Ossicular Interruption symptoms & treatment | Flat 40-60 dB conductive loss. Deep type A tympanogram. Surgical reconstruction. |
Congenital ME Anomalies | Mis-shapen or missing ossicles. Ossicular fixation (any ossicles). Middle ear space filled with tissue. Frequently occur with outer ear disorders. |
Congenital ME Anomalies: causes, HL, Treatment | Genetic or unknown. Varying amount of conductive loss. Surgery, hearing aids (esp. bone conduction) |