CI Basics
What does CI stand for?
Cochlear Implant
What is bimodal hearing?
CI in one ear + hearing aid in the other
What is SSD
Complete hearing loss in one ear, with normal hearing in the other.
What is impedance?
The resistance to the flow of energy through the medium of transmission
Amplitude envelope and fine temporal structure.
What structure do cochlear implants directly stimulate?
Auditory nerve (spiral ganglion cells)
What is bilateral cochlear implantation
CI in both ears
Impact of SSD on children?
Increased Fatigue and difficulty, affecting daily functioning.
What is telemetry?
The process of measuring impedance
What is CI signal coding strategy?
Algorithm used to transform the important features of the incoming acoustic signal into an electrical code.
What are the benefits of bimodal Ci use?
Clearer sound and improved speech understanding, better localization, being able to enjoy music more.
Which device combines acoustic AND electrical stimulation?
Hybrid cochlear implant
What are common treatment options for SSD?
CROS, Bone anchored Implants, CIs
What are the differences in impedance values of an open circuit and a short circuit?
An open circuit has very high impedance, and a short circuit has very low impedance
What type of electrical pulse is used in modern cochlear implants?
Biphasic Pulse
What part of speech helps identify vowels based on F1 and F2
Formants
Which option generally leads to better outcomes: bimodal or bilateral?
Bilateral
What is how a BoneBridge system works?
electromagnetic vibrations stimulate the inner ear, bypassing damaged hearing structures.
What are the different electrode coupling strategies?
Monopolar, Bipolar, Tripolar, and Common Ground
What is IPG(interphase gap) vs IPI(interpulse interval)?
IPG: amount of time that elapses btw each phase
IPI: amount of time btw biphasic pulse
What are the tree main domains of sound processed by CI systems?
Intensity, frequency, temporal
Why are hybrid impalnts used?
To preserve low-frequency hearing while providing high-requency electrical stimulatoin
What is How an Osia System works?
Uses magnetic system for piezoelectric sound transmission, eliminating the need for an external abutment.
What factors can affect changes in impedance values?
The time of day, thickness of skin, fluid, scarring, ossification
CIS pulse rates range from __ - __ pps with __ to __ channels.
800-16000 pps with 8 to 16 channels