The mini-grommet and tympanosclerosis

Area of Science:

• Otolaryngology
• Pediatric Otology
• Biomaterials in Medical Devices

Background:

• Otitis media with effusion (OME) is common in children.
• Ventilation tubes (grommets) are used to treat OME.
• Tympanosclerosis, a common sequela of grommet insertion, can affect hearing.

Purpose of the Study:

• To compare the clinical outcomes of conventional Shah grommets and smaller Mini Shah grommets.
• To evaluate the rates of grommet extrusion, OME recurrence, and tympanosclerosis development.
• To investigate the relationship between grommet characteristics and tympanosclerosis.

Main Methods:

• A randomized controlled trial involving 116 children with OME.
• Myringotomy and insertion of a conventional Shah grommet in one ear and a Mini Shah grommet in the contralateral ear.
• Post-operative follow-up for one year to assess extrusion, recurrence, and tympanosclerosis.

Main Results:

• Mini Shah grommets demonstrated significantly earlier extrusion rates.
• A higher incidence of OME recurrence was observed with Mini Shah grommets.
• Mini Shah grommets showed a decreased incidence and severity of tympanosclerosis.

Conclusions:

• While Mini Shah grommets lead to earlier extrusion and more OME recurrence, they offer a significant benefit in reducing tympanosclerosis.
• The findings support the hypothesis that shear forces from larger ventilation tubes contribute to tympanosclerosis development.
• Smaller grommet designs may be advantageous in minimizing long-term sequelae of middle ear ventilation.