Siegel’s Speculum is a relatively less used instrument in our routine practice. It has three parts, a set of 3-4 speculums; a console fitted with a convex lens with x2 magnification and a pneumatic bulb to push air through the ear speculum. It has following functions: To get a magnified view of the tympanic membrane.
To assess mobility of the tympanic membrane. To differentiate between a retraction pocket and perforation especially when it is in poster o- superior quadrant To alter pressure in the middle ear to look for: A third window in inner ear, which can be of three types mere exposure of the endosteum of the labyrinth or actual labyrinthine fistula leading to leakage of perilymph in the middle ear or superior canal dehiscence syndrome. To create a negative pressure in the middle ear and fix the ossicular chain to perform Gelle test using tuning fork/audiometer Reservoir sign To…
