Site for bone-anchored hearing system for children younger than 5 years

Area of Science:

• Otolaryngology
• Pediatric audiology
• Neurosurgery

Background:

• Congenital aural atresia causes hearing loss, impacting language development.
• Early intervention with hearing devices can mitigate auditory deprivation.
• Current FDA guidelines restrict bone-anchored hearing system (BAHS) implantation in children under 5 years.

Purpose of the Study:

• To determine temporal bone thickness in children under 5 years for BAHS placement.
• To evaluate the feasibility of early BAHS implantation in pediatric patients with aural atresia.

Main Methods:

• A descriptive study involving 38 pediatric patients (<6 years) with congenital aural atresia.
• Temporal bone computed tomography (CT) scans were analyzed.
• Bone thickness was measured lateral to the sinodural angle.

Main Results:

• Mean bone thickness lateral to the sinodural angle in atretic ears varied by age group, with most measurements exceeding 4.8 mm.
• Bone thickness in non-atretic ears also showed age-related variations.
• Results suggest adequate bone stock for BAHS implantation in many young children.

Conclusions:

• Temporal bone thickness is generally sufficient for BAHS implantation in children younger than 5 years with aural atresia.
• The sinodural site is a potential location for magnetic BAHS in this age group.
• Repositioning of the device may be necessary around age 5 for subsequent surgical procedures.