Canaliculitis

Canalicus lith is an inflammatory disease of the accessory duct (skin duct), which forms the middle portion of the posterior wall of the external auditory canal. Currently, canaliculitis is considered as one of the manifestations of diffuse external otitis. Etiology and pathogenesis. Irritation and inflammation of the duct are caused by its anatomical changes (narrowness, narrowing), infection, trauma to the skin (piercing the earlobe during piercing), and the entry of an allergic or infectious agent into the canal. The canaliculus is actively innervated by numerous branches of the inferior auricular nerve, which creates the prerequisites for the development of sensorimotor neuropathic syndrome in this zone.

When examining the patient, hyperemia of the mouth of the duct, a dense inflammatory infiltrate, fused to the peri-leathery bed is detected. A local hyperaesthetic symptom complex develops in the area of ​​canalicular projection: pain and a feeling of bursting at the mouth of the posterior superior postauricular fold (localized at the intersection points of the cutaneous branches of the VII, IX, X cranial nerves). If the development of canaliculi is associated with infection, then a triad of symptoms is often observed: hyperemia, soreness, purulent discharge from the mouth. The amount of purulent discharge varies widely and can be yellow, green or brown. Purulent accumulations at the top of the duct represent a positive clinical test in the form of a provocative test for the severity of the disease. Canaliculitis uses radiography of the mastoid and pyramidal temporal bones, which can provide important information about the anatomical state of the frontal sinus, passing through the upper parts of otitis media; electromyography, which determines the electrotonic indicators of the mucous membrane of the canal, quantitative and qualitative assessment of conductivity and neuromuscular excitability. Treatment. Treatment of cana culitis