Our expert says:
Grommets can be put in as often as required (as long as the indication persists). They will not damage the eardrum, and they do not cause any increase in the incidense of scar tissue formation on the eardrum. Studies have proved that patients without ever receiving a grommet, may also suffer from scar tissue formation to the eardrum, a condition referred to as tympanosclerosis. This does not require any treatment, and does not affect hearing.
The most cases of grommet placement in the literature vary from 11 to even 13 sets of grommets, the message being that they should be considered if the need arises.
Problems arise if they are left in for longer that 2 years. They should be removed, even if a new set is required at a later stage. With any episode of grommet placement, there is a risk of a permanent perforation to the eardrum. This can be dealt with at a later stage, as soon as Eustachius tube function is established.
By not putting in grommets when required, one causes more damage to long term developement in your child (hearing, listening skills, etc.) than not having them inserted. Each case shoud however be treated on merit.
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