The cone of light may appear bent or absent. Perforated Tympanic Membrane Growth of the membrane is from the periphery toward the center. A marginal perforation is more significant than a central one. Perforations, if due to spontaneous rupture resulting from purulent otitis media, may be observed subsequent to the treatment of otitis. Serous Otitis Serous fluid in the middle ear results from an obstructed eustachian tube.
Air is absorbed by cells lining the middle ear, resulting in a vacuum.
Subsequently a transudate from the mucosa fills or partially fills the vacuum. Gain patency of eustacian tubes. One way to do this is to teach patients autoinsufflation. This forces air into eustachian tubes and causes a popping sensation. Control of allergies.