Traumatic perilymph fistulae of the round and oval windows

Round window membrane perforation—a complication of chronic suppurative otities media

“…It is therefore subjected to more stress and strain from noise as it is not as tough as the tympanic membrane and is therefore more susceptible to rupture due to noise trauma. The amount of perilymph leakage and the appearance of the round window membrane, as observed by us in our experience of 14 cases of the round window membrane rupture, can be of various types (Grewal et al, 1983):…”

Acoustic trauma and perilymph fistula

“…Noise-induced perilymph fistula has only been described following accidental exposure to gunfire (Goodhill. 1980) and to an exploding cracker (Grewal et al, 1983). but fistula formation following exposure to music has not previously been reported.…”

Round window reflex and oval window fistulae

“…They form part of a larger series of 45 cases of round and oval window fistula of which 34 were of the round window membrane, and eleven of the oval window footplate ligament. Certain aspects of traumatic perilymph fistula and of round window membrane fistula complicating chronic suppurative otitis media have been described elsewhere (Grewal et al, 1983, Grewal andShah, 1986). The cases are summarized in Table 1.…”