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.
Tympanic thermometry. The first devices used to measure tympanic membrane (TM) temperature did so by being in direct contact with the tympanic membrane. In 1969, it was shown that such a device measured core temperature better than a rectal thermometer.onetheless, children who are younger than two years of age should continue to have their temperature taken rectally until an adequate probe for tympanic thermometry is designed or until other methods of measurement are shown to be accurate and reliable in larger studies (Table 2).