AB System Flashcards
(29 cards)
What is the most important date to remember for upgrading?
April 2001- that’s when the cII was approved
What are the components of the AB system?
Internal- implant and array
External- sound processor headpiece accessories
What does ICS stand for?
Implantable cochlear stimulator
When did the hiRes 90k come out?
2003
Why can recipients with the cII and later upgrade but not CI?
Te circuit board in cII and later has a memory chip and electronics take up less space
How many output circuits does the C1 have?
8
How many output circuits are in the cII and 90k?
16
How many outputs do cochlear and medel have?
Cochlear- 1
Medel-12
How many pulses per second does te cII and 90k deliver?
83,000
What are the components of the ICS?
Casing and receiver package Output circuits Capacitor Magnet Custom clip Bi directional telemetry Electrode array
Casing materials of the ICS must be what?
Biocompatible
What are the positives to ceramic casing?
Good transmission properties
Antennae and electronics housed in single unit
What are negatives to ceramic casing
Larger bed needed for placement- more drilling required
What are positives about titanium casing?
Less drilling is required
What are the negatives to titanium housing?
Poor transmission properties so electronics and antennae housed separately.
What is an output circuit?
Individual circuits with separate power sources. Can stimulate individually or together or between
What is a capacitor?
Electronic component that holds charge and ensures charges don’t go where they shouldn’t go
What is “loss of lock”?
When the internal and external device are not communicating
What is telemetry?
Ability to send information both directions (forward and backward telemetry)
What is the numerical value for forward telemetry?
49MHz
What is the numerical value for backward telemetry?
10.7MHz
What dies forward telemetry do?
Sends across data and power info
What does backward telemetry do?
Provides info about status of implant
Gives impedance measures
Allows system to continually monitor function
What is the difference between the spiral electrode and the HiFocus?
HiFocus has 1 power supply for each electrode
Spiral electrode has 1 power supply for a pair of electrodes
