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Devices to help you hear
1. Opportunities with Implantable Hearing Technologies Douglas D. Backous, MD, FACS Medical Director, Swedish Center for Hearing and Skull Base Surgery Seattle, Washington USA SNI Grand Rounds January 6, 2011
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5. Left bone Right air Left air 100% 100% Right bone Understanding the Audiogram Normal Mild Hearing Loss Moderate Hearing Loss Severe Hearing Loss Profound Hearing Loss
27. Hearing loss in the U.S. 1.Kochkin, S. The Hearing Review,(2005); July. 2.Blanchfield, B.B.. JAAA. (2001);12: 183-189. 3.Available Mkt- National Institute on Deafness & Communication Disorders (NIDCD) 2004 4. Recipients– Internal Cochlear data Total hearing loss 1 1.6% annual growth rate 32m Potential device candidates 2,3 1 - 1.2 million severe-profound and profound 1 million SSD, mixed and conductive ~2m Total implanted population 4 10% Cochlear Implant /1% Baha <100k
A sound processor picks up sound vibrations. An abutment transfers sound from the Baha device to the implant. A small titanium implant transfers the sound vibrations via the skull bone to the functioning cochlea.
Typical audiogram ranges
Sudden, progressive, etc. How long without sound? (hearing aids) Spoken vs. sign
HINT sentence scores in quiet (Q): N=53. HINT sentence scores in noise preoperative (N)=19 and postoperative (N)=53 The reason for the different Ns in quiet and noise is that only patients who performed >20% in quiet were tested in noise. Only 19 subjects scored over 20% in noise preoperatively . Therefore, those 19 subjects were tested preoperatively in noise and all 53 were tested postoperatively in noise.
Patients currently being helped: < 10% cochlear implant < 1% Baha implant
Important to have a highly motivated patient. Counseling is imperative. It is important that the patient and family understand what benefits the device will provide- improve lip-reading and detect environmental sounds. It takes time to learn to use the information provided by the device.
PET mesh added to help stabilize device and minimize movement.
Translab approach typically used this surgical photo demonstrates the appropriate location for the array, near the point where the eighth nerve enters the brainstem
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The ABI can help patients communicate by improving lipreading and hearing environmental sounds. A small number of patients experience open set understanding. True benefit often underestimated Helps recipient cope with their illness ABI can reduce isolation and improve their quality of life
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