Greetings
Welcome to Healthcaremagic.
Ur Mother in law seem to be having multiple disorders like
Renal failure,
heart failure and cerebral
vascular disease. But your question is about her
hearing loss.
With so many problems going on ,there is always chances of other systems ,like hearing,sight ,speaking etc may be effected either directly or indirectly.In the case of your Mother in law,the biggest factor is her age .103 years is well beyond the normal life expectance and old age causes stiffening of the parts with in the ears which is called as
Otosclerosis. Then the main processing center for hearing also is with the brain .As the brain has
atherosclerosis this compounds the effect of hearing loss due to age. As far as
ear wax is concerned , it is wise to get it cleaned by a specialist but that doesnt seem to be the main problem here.
What we can do is that proper medication be taken regularly with relevant labs to avoid worsening of the problem.Secondly ,otolyrangologist may help you in this regards by advising a surgery ,but old age plus many organs in bad shape will make the surgery not feasible .
I hope the answer was helpful.In case you need any further assistance feel free to contact in writing.
Regards
Dr Talal Hussain