Presentation on theme: "Cochlear Implants Abstract: When a person loses hearing, cochlear implants make it possible to restore their ability to hear. Through surgical procedure,"— Presentation transcript:
1 Cochlear ImplantsAbstract: When a person loses hearing, cochlear implants make it possible to restore their ability to hear. Through surgical procedure, a system of electronic components is able to replace a damaged biological system. The most important part of the system is the electrical to biological connection made by the electrodes.Presented by: Connor Abens EE 4611Kevin Chan May 2, 2014
2 Outline History of Cochlear Implant How the ear works Device structure Bio-friendly materialsPros/ConsPotential ImprovementsFuture of ImplantKevin
3 History 1800 Allesandro Volta stimulated inner ear with electricity 1956 Cochlear implant was designed1978 First multi-channel cochlear implant1980 FDA began regulation of cochlear implants1984 First implant in an adult approved by FDA1990 FDA approved implant for children above 2 years old2000 FDA approved implant for infants above 12 months of age.Connor
4 Development Cochlear Limited Advanced Bionics Cochlear™ Nucleus®This is the timeline of their implant componentsAdvanced BionicsHarmony™ processorHiRes 90K™ implantMedical Electronics (MED-EL)MAESTRO™ 3.0 system
5 How the ear works Outer Canal Drum Middle (bones) Malleus, Incus, StapesInnerCochleaAuditory NerveKevin/Connor
6 Types of Hearing Loss Conductive Middle ear Sensorineural Inner ear stereociliaCochlear NerveConnection to brainKevin
10 Demonstrations of sound Robotic-likeFuzzy radioContext helps understandingConnor
11 Bio-friendly materials Silicone (1,5)Used to case the electronicCeramics (older models)Weak and sensitive to external forcesTitanium (2)Replaced ceramic componentsPlatinum (3)Used for electrode contactsKevin
12 Pros Cons Hearing is possible immediately after surgery Sensitivity to a variety of soundsEliminates the reliance upon other peoplePotentially enjoy musicUpgradable componentsSpeech understanding without lip-readingLoss of natural hearingPossible negative side effectsMust avoid water damageElectromagnetic noiseRelative Volume isn’t automaticStatic electricity damageCosts $45,000 to $105,000Connor
14 Laser-based cochlear implant Electric stimulation isn’t preciseModified cells react to light stimulationPrecision lasers instead of electrodesTesting in rats and toadfishInfrared light affects calcium ion flowThis causes nerve cells to release neurotransmittersConnor
15 Summary How the ear works Device structure Potential Improvements Infrared light stimulationKevin
16 Sources General Information http://www.medel.com/us/ https://wiki.engr.illinois.edu/download/attachments/ /ECE+415+Cochlear+Implant+Final.pdfhttps://www.nidcd.nih.gov/health/hearing/pages/coch.aspxLaser based implantBiomaterials
17 5 Key ConceptsSounds travels through the ear canal then causes mechanical vibration which creates waves in the cochlear fluid. Those waves move the small hairs that stimulate the nerve cells.Cochlear implant directly stimulates nerve cells in the cochleaElectronic Components consist of: microphone, processor, transmitter, stimulator.Silicone, ceramics, titanium and platinum are the materials used and accepted by the body.Electrode stimulation isn’t precise because electric current can disperse into tissue. Laser stimulation is being studied to improve the precision of implants.
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