- Ans.B. Myringotomy
- Myringotome is the instrument shown in the image.
- Myringotome is a surgical knife used for paracentesis of the eardrum.
- Myringotomy is done by a sharp myringotome.
– Acute suppurative otitis media
- Severe earache with the bulging tympanic membrane.
- Incomplete resolution with opaque drum and persistent conductive deafness.
- Complications of acute otitis media,e.g.facial paralysis, labyrinthitis or meningitis with the bulging tympanic membrane.
– Serous otitis media.
– Aero-otitis media (to drain fluid and “unlock” the eustachian tube)
– Atelectatic ear (grommet is often inserted for long-term aeration)
Suspected intratympanic glomus tumor.
Steps of operation:
1. The ear canal is cleaned of wax and debris.
2. Operation is ideally performed under an operating microscope using a sharp myringotome and a good suction apparatus.
3. In acute suppurative otitis media, a circumferential incision is made in the posteroinferior quadrant of the tympanic membrane, midway between the handle of malleus and tympanic annulus, avoiding injury to the incudostapedial joint.
4. In serous otitis media, a small radial incision is given in the posteroinferior or anteroinferior quadrant and all the effusion is sucked out.