Grommets (ventilation tubes)

Grommets

Grommets are tiny ventilation tubes placed in the eardrum to allow air into the middle ear and fluid to drain. They are used most often in children but can also be appropriate for adults. This information supports an individual discussion with the ENT specialist.

How the middle ear works

Sound travels through the ear canal to the eardrum and ossicles, which transmit vibration to the cochlea. The middle ear is normally aerated through the Eustachian tube connecting it with the back of the nose. When the tube does not ventilate well, negative pressure and fluid can develop behind the eardrum.

When are grommets considered?

Persistent otitis media with effusion (glue ear) can cause muffled hearing, pressure and sometimes discomfort. In children it may affect attention, behaviour, speech or learning. The ENT specialist considers the duration and severity of hearing loss, effects on development, recurrent infections, eardrum changes and any additional risks before recommending observation, hearing support or grommets.

The procedure

A small opening is made in the eardrum, fluid is suctioned when present and the tube is inserted. Children usually receive general anaesthesia; selected adults may be treated under local anaesthesia. The procedure is short and commonly performed as day surgery.

After placement

Hearing often improves quickly when fluid caused the loss. A tube usually works for several months and is pushed out naturally as the eardrum heals, although some types remain longer. Follow-up checks whether the tube is open and the eardrum is healthy. Some patients need another set if fluid returns; the need often decreases as Eustachian-tube function matures.

Routine water precautions are not required for every patient. Follow the surgeon’s advice about swimming, diving and soapy or contaminated water. Do not put drops in the ear unless advised.

Possible problems

• Ear discharge: fluid or pus can drain through a working tube during an infection. Contact the clinic if it persists, smells unpleasant, is bloody or the patient is unwell. Antibiotic ear drops are often preferred when treatment is needed.
• Blockage or early extrusion: the tube may become blocked or fall out before the underlying problem has resolved.
• Persistent perforation: occasionally the opening does not close after the tube comes out and later repair may be required.
• Scarring or repeated procedures: small eardrum changes can occur; significant long-term hearing damage from a correctly managed tube is uncommon.

Seek medical advice for severe pain, swelling behind the ear, dizziness, sudden hearing deterioration or persistent discharge.