RE: My opinion on hair cell regeneration in cochlear implantees

[Guest guest]

Where did you hear that the Contour was designed to let people retain more

residual hearing?? The Contour was desined to allow the array to fit snugly to

the modiolus so that we get the best contact for hearing with the least energy

consumption.

In a message dated 5/21/2004 2:10:52 AM Eastern Standard Time,

jt1@... writes:

I have wondered many times also why the Nucleus Contour array will be able

to let people retain some residual hearing after implantation.

[Guest guest]

I didn't said that Contour was designed to let people retain more residual

hearing. Some implantees do retain their hearing, not all though, just a few

as posted here before.

Isn't it that it's the movement of hair cells that make normal cochlear hear

sound? If the electrode is attached to one side of the wall, there will be

more space for movement for hair cells on the other side of the wall.

The above are just my theories/opinions and no studies supported.

Are there any studies with regard to having back old residual hearing prior

the implant when the implant is explanted? I somewhat suspect that implant

do total hearing loss, for me it's more like the presence of electrodes

prevent the haircells from moving if there's any. So maybe implantees do not

need to worry about future hair cell regeneration.

Regards/

Jerome

Re: My opinion on hair cell regeneration in cochlear

implantees

Where did you hear that the Contour was designed to let people retain more

residual hearing?? The Contour was desined to allow the array to fit snugly

to the modiolus so that we get the best contact for hearing with the least

energy consumption.

In a message dated 5/21/2004 2:10:52 AM Eastern Standard Time,

jt1@... writes:

I have wondered many times also why the Nucleus Contour array will be able

to let people retain some residual hearing after implantation.

[Guest guest]

Jerome,

The hair cells do not move freely in the cochlear duct. The stereocilia

of the hair cells are embedded in the tectorial membrane, so they are

not exposed to the duct. It is my understanding that as the electrode

is placed into the cochlea, it causes physical damage to the organ of

Corti, so it's not an issue of just removing it the electrode. I also

don't have data for that and I don't think we will really know until the

first generation of CI recipients die of natural causes and (hopefully)

donate their temporal bones for study. The electron microscopy could be

done to see the precise pattern of damage done by the insertion of the

electrode.

Speaking of temporal bone donation, this is a very important component

to the growing understanding of hearing loss. The Temporal Bone

Registry need donations of people with normal as well as impaired

hearing. Once a person sign sup for it, they handle everything

post-mortem and the harvesting of the bones is done in such a way that

an open casket funeral is still possible.

If anyone is interested, more information is at:

http://www.tbregistry.org/

____________________________________________

Best Regards,

Brad Ingrao, M.S.Ed. CCC-A, FAAA

Editor

EDEN - The Electronic Deaf Education Network

www.bradingrao.com

e-mail: info@...

Re: My opinion on hair cell regeneration in cochlear

implantees

Where did you hear that the Contour was designed to let people retain

more residual hearing?? The Contour was desined to allow the array to

fit snugly to the modiolus so that we get the best contact for hearing

with the least energy consumption.

In a message dated 5/21/2004 2:10:52 AM Eastern Standard Time,

jt1@... writes:

I have wondered many times also why the Nucleus Contour array will be

able to let people retain some residual hearing after implantation.

[Guest guest]

Hi Brad,

Thanks for the info.

I think up to now there's still no study about long term use of cochlear

implant. Aren't there any donated temporal bones so far? Or is it that

cochlear implantees have longer life because they are now happier? I read

somewhere that cochlear implantees are healthier in general, but we cannot

remove the fact that there's health screening before the implantation.

Back to the organ of Corti, can it still be repaired? I wonder if there's

any research on that. I don't have any idea either whether there's

possibility of it being damaged beside cochlear implantation.

Do they get temporal bones outside USA?

Regards/

Jerome

Re: My opinion on hair cell regeneration in cochlear

implantees

Where did you hear that the Contour was designed to let people retain more

residual hearing?? The Contour was desined to allow the array to fit snugly

to the modiolus so that we get the best contact for hearing with the least

energy consumption.

In a message dated 5/21/2004 2:10:52 AM Eastern Standard Time,

jt1@... writes:

I have wondered many times also why the Nucleus Contour array will be able

to let people retain some residual hearing after implantation.

[Guest guest]

Jerome,

I don't have the answers to your questions, but I encourage you to

contact the temporal bone registry and ask them.

____________________________________________

Best Regards,

Brad Ingrao, M.S.Ed. CCC-A, FAAA

Editor

EDEN - The Electronic Deaf Education Network

www.bradingrao.com

e-mail: info@...

Re: My opinion on hair cell regeneration in cochlear

implantees

Where did you hear that the Contour was designed to let people retain

more residual hearing?? The Contour was desined to allow the array to

fit snugly to the modiolus so that we get the best contact for hearing

with the least energy consumption.

In a message dated 5/21/2004 2:10:52 AM Eastern Standard Time,

jt1@... writes:

I have wondered many times also why the Nucleus Contour array will be

able to let people retain some residual hearing after implantation.