Aural Rehab SLP401
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| Microphone | Converts acoustic energy (sound pressure) into electric energy.
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| Amplifier | Digital Processor - converts electric (analog) signal to digital for processing (DSP) then back to analog.
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| Receiver | Speaker - converts amplified electrical signal back to acoustic. Becoming smaller (esthetic) and less powerful (smaller range of HL)
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| Battery | Power source. Zinc-air. Color-coded sizes.
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| BTE | PROS: largest, most powerful, replaceable ear mold, easy cleaning, minimized head-shadow effect, easy access controls, more memory/features. CONS: big, annual tube replacement
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| RIC | mic out, dome in. most popular, PROS: Allows lower freqs in naturally, amplifies high. Ear mold option (for more HL). Less occlusion/plugged up feeling. No tubing, no moisture. CONS: Wax buildup, feedback management. leaks power.
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| ITE | Full ear bowl, custom-made. Mild to mod HL. PROS: ease of management (one piece), natural mic placement in ear canal opening. CONS: occlusion effect- vocal and chewing sounds reverberate.
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| ITC | Custom mold leaves concha open. PROS: ease of management (one piece), natural mic placement. CONS: occlusion effect
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| CIC | Custom mold. Not for severe or greater HL. PROS: ease of management, rec. near TM (improved high freqs, less feedback), difficult to see (cosmetic), preserves natural resonance of outer ear, easy to use with a phone. CONS: occlusion effect
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| IIC | 2nd bend of ear canal. removable for patient cleaning/ battery replacement. Mix of BTE and ITE. PROS: smallest, least obtrusive. Modular design for easy part replacement. Exterior case large enough for sophisticated electronics and mics.
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| Extended Wear | Several months without removal. Disposable. PROS: subscription-based, no maintenance, showering (no immersion). CONS: uncomfortable (40-50% return rate). Mild to moderate HL. only.
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| BAHA | candidacy: atresia or chronic ME dysfunction, single-sided deafness, conductive and mixed HL.
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| CROS | Contralateral routing of signal. Candidacy: unaidable HL in one ear, and normal in other. Unilateral severe to profound sensorineural hearing loss. Poor word discrim.
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| BI CROS | candidacy: one ear is unaidable, aidable HL in other. Signals from both sides go to the best ear. severe to profound sensorineural hearing loss.
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| ME implant | candidacy: 18+ with healthy middle ear intolerate of object in the canal. Complicated, expensive surgery not covered by insurance. Older (70+) patients less likely. Conductive and/or sensorineural (most often) HL. .
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| HA capabilities- DATFLWR | directional microphones, automatic volume control, telephone coils (t-coils), feedback (whistling) control, listening programs, wireless technology/bluetooth , remote control
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| CI (adult candidacy) | Severe to profound bilateral HL. Less than 50% speech recognition with open-set sentences. Ltd benefit HA trial. Poor word discrim scores.
Realistic expectations.
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| CI (pediatric) | Infants 12-24 mos: profound bi SNHL. No auditory progress with HA and EI. High motivation. Children 25 mos - 17 yrs: severe to profound bi SNHL, up to 30% on word recog at normal conversl levels. No auditory progress, high motivation.
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| CI preoperative criteria | severe or profound bilateral SNHL, one year or older, intact AN, little or no benefit from HAs, 3-6 month trial w/ AR, no medical contraindications, no ME disease, educational setting, motivated familyand realistic expectations.
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