FinleyNotes
Charlie Finley Ph.D
Department of Otolaryngology
- Grad experience: a patient was misdiagnosed “dumb” instead of deaf
- the sign for Cochlear Implant is “snake bite”
- Cochlear Implant:
- external sound processor
- wire w/ electrodes in inner-ear
- battery pack
- 3 major manufacturers
- Inner “normal” ear
- vestibuli system: orientation
- Cochlear implant affects this for a couple days
- Basiliar membrane
- detects different frequencies
- causes cilia movement
- cilia release neurotransmitters
- vestibuli system: orientation
- Types of Deafness
- Conductive: mechanical/bone problem, corrected by a surgeon
- Sensory neural: lose of sensory hair cells/auditory nerve fibers
- iPod
- on-ear: gives more space
- in-ear: sits very close, seals so no energy escapes
- Don’t be decieved! seals out other noises so you can listen at a lower volume, but also concentrates the existing sound so it is more powerful to your ear
- loud sounds can cause temp threshhold shift (TTS)
- tips on cilia break
- ex: from loud concert
- Common consequences of loud sounds
- Pure tone tinnitus
- ringing created by damaged membranes
- Broadband tinnitus
- static background
- Pure tone tinnitus
- 30% have some hearing loss
- 66% in the field of rock and roll
- Some use preventative measures such as hearing protection that allows them to hear themselves at a lower volume
- Cochlear implants
- Transfers across skin: different ways can limit the tech. adv.
- optimal # of channels? performance levels out around 7
- Inserting the electrode does cause damage to the cochlea
- Just beginning to understand the consequences
- very crude technology
- Technology issues
- improving battery size and life
- smaller size appropriate for children and elderly
- Patient issues
- Dif performance in dif patients
- Typically implant 1 year-olds
- Try to implant before 3–3.5 years old
- Imaging analysis can optimize cochlear implants
- Too sophisticated for avg clinic
- Build a model for each patient?
- Too long, use shortcuts
- Custom processor design