if she is motivated for a cochlear implant she is a very favorable candidate. We have several subjects with similar history implanted, they all do very good with speech understanding scores around 80%.
Also, majority audiometric findings within the population of patients with otosclerosis is a mixed hearing loss: first is "falling" down conduction hearing curve than sensori-neural; of course there are cases of pure sensori-neural hearing loss where otosclerosis happen in the cochlea (not around stapes). In this case, only a CI can help.
Also, if her hearing loss is not so bad to consider a CI there is also another implant - Vibrant Soundbridge which clinical indications are up to 75dB approximately AND hearing curve should be stable at least 18 months.
This patient has a severe PROGRESSIVE hearing loss and conventional hearing aids are no longer helping him. Vibrant soundbridge would work but not for long because the hearing loss is progressive. The only long term option for this patient would be a CI. This severe progressive hearing loss will be profound in a near future and neither conventional hearing aids nor vibrant sound bridge would work. Take the right decision for the patient and explain to him that his is left with this long term solution which is the CI. Good luck
We still do not know what are hearing thresholds and do not know anything about how fast progression is going on. Long term option is definitely a CI but if she (it is not a man) is still not candidate what we do not know. Without these information it is impossible to make clinically wise decision for the patient at exact moment in time.