1 Scientists believe this powerful predator could eat up to 500 pounds (230 kilograms) of meat in one bite. 2  Fossils of T. rex prey, including Triceratops and Edmontosaurus, suggest T. rex crushed and broke bones as it ate, and bone fragments have been found in its dung.
Etiology. Infection is the principal cause of tympanic membrane perforation (TMP). Acute infection of the middle ear may cause a relative ischemia in the drum concurrent with increased pressure in the middle ear space.This leads to a tear or rupture of the eardrum that is usually preceded by severe pain. If the perforation does not heal, it leaves a residual tympanic membrane perforation (TMP).nfection is the principal cause of tympanic membrane perforation (TMP). Acute infection of the middle ear may cause a relative ischemia in the drum concurrent with increased pressure in the middle ear space.
Moreover, the cotton swab and the bobby pin actually have the opposite of the intended effect; they push the earwax further down into the ear canal where it can become stuck and lead to infection. The tympanic membrane, or eardrum, is a thin layer of cone-shaped tissue that separates the outer ear from the middle ear. It facilitates hearing by transmitting sound vibrations from the air to the bones in the middle ear. How Does It Work? The tympanic membrane is called the 'eardrum' for a reason. (Tympanum, by the way, is Latin for drum).