Pediatric Single-Sided Deafness: Evaluation and Management
All children with single-sided deafness (SSD) should be considered eligible for early intervention services and undergo comprehensive audiologic evaluation with ABR testing, medical evaluation including genetics consultation and otolaryngology assessment, and be offered amplification options with ongoing developmental monitoring, regardless of the unilateral nature of their hearing loss. 1
Diagnostic Evaluation
Audiologic Assessment
- Confirm diagnosis with ABR testing as part of comprehensive audiologic evaluation for children under 3 years, even with unilateral loss 1
- Perform behavioral audiometry appropriate to developmental age:
- Visual reinforcement audiometry (6-24 months)
- Play audiometry (24-48 months)
- Conventional audiometry (≥4 years) 2
- Include speech detection/recognition thresholds and speech understanding measures 2
- Do not substitute tympanometry, pneumatic otoscopy, or caregiver judgment for formal hearing testing 2
Medical Workup
The following evaluations are mandatory 1:
- Otolaryngology evaluation by physician knowledgeable in pediatric hearing loss
- Genetics consultation offered to all families - genetic etiology is likely in most cases 3, 4
- Ophthalmology examination by experienced pediatric ophthalmologist
- Imaging studies to identify anatomic abnormalities (cochlear nerve deficiency is found in 44% of congenital SSD cases) 5
- CMV testing if diagnosed early, as congenital CMV accounts for 6.8% of pediatric SSD 5
Etiologic Investigation
Target the history and examination toward 4:
- Three-generation pedigree with attention to consanguinity and inheritance patterns
- Ethnicity and country of origin
- Audiometric characteristics in affected family members
- Evidence of vestibular dysfunction
- Syndromic features (visual abnormalities, cardiac issues, renal problems, pigmentary changes)
- Environmental exposures (aminoglycosides, noise, prematurity)
Management Approach
Early Intervention Services
Initiate intervention within 2 days of diagnosis confirmation and begin services no later than 6 months of age 1. This is critical because:
- 46% of children with SSD show delays in receptive language skills
- 48% demonstrate delays in expressive language skills 6
- Deficits can parallel those seen in bilateral hearing loss despite having one normal ear 7
- Early intervention within the sensitive period of auditory development may prevent cognitive, academic, and psychosocial barriers 7
Intervention Team
Services must be provided by professionals with specific expertise in hearing loss 1:
- Educators of the deaf
- Speech-language pathologists specializing in hearing loss
- Audiologists
- Both home-based and center-based options should be offered 1
Amplification Options
Assess appropriateness of hearing aid fitting for all children with SSD 1. The decision depends on degree of residual hearing:
Conventional hearing aids:
- May benefit some children depending on residual hearing
- Trial fitting recommended to determine benefit 1
Bone conduction devices:
- Demonstrate benefits in sound perception and quality of life 8
- More readily accepted than CROS systems
Contralateral routing of signals (CROS):
- Not recommended for pediatric unilateral hearing loss 1
Cochlear implantation:
- Emerging as viable option for congenital SSD 9, 10
- Goals include providing bilateral input and developing binaural hearing 9
- Significant improvements demonstrated in:
- Best outcomes with early implantation (mean age 2.6 years in successful cases) 11
- Requires specialized candidacy evaluation and follow-up protocols 9
Critical Caveat on Amplification
Be prepared for high rates of device discontinuation - 84.7% of pediatric SSD patients report either discontinued use or <6 hours daily use 5. Common reasons include:
- Vibratory sensation with devices
- Having "good enough" hearing in one ear
- Lack of perceived benefit
This underscores the importance of thorough counseling about realistic expectations and the need for ongoing support.
Ongoing Surveillance
Developmental Monitoring
Regular assessment is essential because intervention needs may be subtle 1:
- Standardized developmental screening at 9,18, and 24-30 months using validated tools 1
- Speech-language evaluation if concerns arise or screening failures occur 1
- Monitor for:
- Language development delays
- Academic difficulties
- Social-emotional challenges
- Patient fatigue and parental stress 7
Audiologic Follow-up
- Regular hearing assessments in both ears
- Aggressive management of otitis media with effusion - OME compounds the hearing deficit and negatively affects amplification fitting 1
- Never delay amplification fitting for OME resolution; treat OME promptly instead 1
Family-Centered Counseling
Provide families with 1:
- Unbiased information about all communication options and hearing technologies
- Opportunities to interact with other families of children with hearing loss
- Access to deaf and hard-of-hearing adults and children
- Information about professional and consumer organizations
- Culturally sensitive communication in understandable format
- Recognition that some families view deafness as a cultural/linguistic identity rather than pathology 3
Common Pitfalls to Avoid
Assuming one normal ear is sufficient - Historical views are outdated; SSD significantly impacts development 7, 6
Missing the diagnosis - 23.9% of congenital SSD cases pass newborn hearing screening 5
Delaying intervention - The sensitive period for auditory development is time-limited 7
Inadequate follow-up - Loss to follow-up occurs in 39.8% of cases 5; establish robust tracking systems
Overlooking comorbidities - Cochlear nerve deficiency, syndromic features, and progressive conditions require identification 5, 4
Failing to address parental guilt and anxiety - Genetic counseling can relieve guilt and provide psychological benefit 3