It took several months for us, nearly 6 actually, before evaluations were completed for my daughter. This isn't conclusive, and we repeated the hearing tests several times over, but these are the evaluative steps we took during the months leading up to getting her CI. Many were to rule out health issues that were somewhat common for those born deaf, as my daughter likely was, and because we had no access to any family history.
hearing (over several visits):
- behavioral audiometry tests (soundfield + then VRA with insert earphones)
- bone conduction testing
- Acoustic Immittance Measures (tympanometry, middle ear muscle acoustic reflex)
- ABR (auditory brainstem response) once awake, once under sedation
- aided testing (after fitting with HAs)
genetic / other physical tests (one visit):
- Blood drawn for following tests
- connexin 26 mutation
- connexin 30 gene
- mitochondrial DNA gene mutation (a whole bunch)
- SLC26A4 (PDS) gene
- PAX3 gene (Waardenburg I was initially suspected)
- ECG, cardio, respiratory, gi workup
- opthalmology
- renal ultrasound
- urinalysis
- examination and measurement of pigmentation, facial structure, body/limb structure
And once considered a candidate:
- psych and development evaluations
- CT scan
- MRI