Life is Bliss - Lily's Cochlear Implant Journey

Cochlear Implants before 12 months? Here's a new study showing benefits.

I have long believed that implanting kids before 12 months of age was an important and necessary approach for optimizing long-term speech outcomes.  Lily was implanted 7.8 years ago at the age of 10 months.  We would have done it earlier if the surgeon would have agreed.  

Eight years later, the age of 12 month is still used as a guideline for implantation.  

Here's a new study detailing the benefits of implanting kids before 12 months of age.  

 

 

Can an MRI determine success with a Cochlear Implant?

Interesting study determining a Functional MRI May Predict Children’s Language Skills Post-Cochlear Implant.  

Researchers at Cincinnati Children’s Hospital Medical Center found that elevated activity in two regions of the brain, evaluated with functional MRIs before implantation, may be biomarkers in children who do best with implants.  The study appears in Brain and Behavior.

Summary in ASHA Leader - http://leader.pubs.asha.org/article.aspx?articleid=2478939

Abstract of study - http://onlinelibrary.wiley.com/doi/10.1002/brb3.391/abstract

Cochlear Implants in Noise: SNR loss in children using the BKB-SIN

Lily just finished her semi-annual visit to the audiologist.  We arrived with what turned out to be a broken headpiece, and fortunately, were able to order a new one for delivery the next day.  The headpiece had been cutting in and out for the previous few days and created a number of difficult listening situations with just one side.  

With a loaner headpiece, Lily went into the booth for tests.  

In quiet, Lily does very well.  Tonight, Lily was asking if she hears as well as a "typically" hearing person.  When we said yes, pretty much, she was quite proud.  However, noise continues to be a challenge.  Especially when the noise is variable.  

At the audiologist, Lily took an interesting test - BKB-SIN.  The BKB-SIN is a speech-in-noise test that uses BKB (Bamford-Kowal-Bench) sentences, recorded in four-talker babble. The BKB-SIN can be used to estimate SNR loss in children.   Lily's results were as follows.  Essentially, it says for Lily to get 50% accuracy, the signal has to be at least +9db above the noise floor or +11.5 db more than a normally hearing person (in a bilateral hearing situation).  

BKB-SIN Right CI only   SNR for 50% correct:   SNR loss re: normal Left CI only   SNR for 50% correct:   SNR loss re: normal Bilateral CI’s   SNR for 50% correct:   SNR loss re: normal	+14.5 dB 17 dB   +9.5 dB 12 dB   +9 dB 11.5 dB

An individual with normal hearing sensitivity would be expected to score 50% correct at a signal to noise ratio of -2.5 dB.  The SNR loss is the difference between the signal to noise ratio at which Lily scored 50% correct and -2.5 dB.