extratympanic ear canal surgery

Chronic non-suppurative otitis media is a frequently-occurring disease, common disease, more common in children. The impact on hearing is so severe that it affects children's intellectual development and learning. It is characterized by obstruction of the eustachian tube, causing tympanic effusion. The tympanic effusion is caused by diseases such as catarrhal otitis media, secretory otitis media, barotitis media, and aviation otitis. Drainage of tympanic effusion is one of the important measures for the treatment of non-suppurative otitis media. The commonly used method is the insertion of grommet. The cannula can be inserted into the inner tympanum through the external auditory canal and tympanic membrane. Curing disease: Indication The external ear canal tympanic catheter is the same as the indication of the placement of the snorkel through the tympanic membrane, but it is most suitable for the person who is repeatedly discharged through the tympanic membrane. Contraindications 1. Initially suffering from secretory otitis media, tympanostomy can be performed first. 2. Jugular spheroid tumor (tympanic type). 3. People with severe heart disease or blood diseases. Surgical procedure 1. Place the otoscope and expose the lower part of the ear canal. 2. On the inferior wall of the ear canal, use a curved scalpel to make a parallel arc-shaped incision at a distance of 10 mm from the sulcus, which is about 8 mm long. 3. Separate the periosteal flap from the incision direction to the sulcus with a periosteal stripper, and separate the tympanic membrane cartilage ring from the posterior to the tympanic cavity. 5. Place the vent tube to insert the vent tube into the small groove, the front end of the edge protrusion is placed in the tympanic chamber, and the other end is exposed outside the incision. 6. Reset the ear canal flap to cover the ear canal bone and snorkel. The tympanic membrane and the ear canal skin are fixed with a gelatin sponge and a gauze or iodoform gauze impregnated with cortisone and antibiotics. complication 1. Infection with otitis media: It can occur several days after the operation, mostly due to improper selection of indications or due to lack of disinfection. 2. Jugular bulb injury is caused by a jugular bulb malformation in the patient. If the incision is inadvertently caused by bleeding, the operation should be stopped and the ear canal should be stopped. It should be checked carefully before surgery. 3. When the ear canal skin edema blocks the snorkel, it is treated with anti-inflammatory and swelling drugs. After a few days, the outer end of the snorkel can be exposed.