20
Auditory Brainstem Implant

Auditory Brainstem Implant. Electrode array inside cochlea

Embed Size (px)

Citation preview

Page 1: Auditory Brainstem Implant. Electrode array inside cochlea

Auditory Brainstem Implant

Page 2: Auditory Brainstem Implant. Electrode array inside cochlea
Page 3: Auditory Brainstem Implant. Electrode array inside cochlea

Electrode array inside cochlea

Page 4: Auditory Brainstem Implant. Electrode array inside cochlea

Nucleus Array In Situ - showing 22 channels safely placed in speech frequency range

Page 5: Auditory Brainstem Implant. Electrode array inside cochlea

The Auditory Pathway

Diagram showing relative positions of a cochlear implant andan auditory brainstem implant

Medial geniculate body

Inferiorcolliculus

Lateral lemniscus

Superior&accessory olive areaDorsal cochlearnucleusVentralcochlearnucleus

(Adapted from"Neurotology",Jacklerand Brackmann)

Cochlear

Auditory cortex

VIIIthnerve

CochlearImplant

AuditoryBrainstemImplant

Page 6: Auditory Brainstem Implant. Electrode array inside cochlea

Nucleus 24 Auditory Brainstem Implant

CI24M receiver-stimulator

Monopolarreference electrodes

(ball & plate)

Microcoiled electrodewires

Electrode array(21 platinum disks0.7mm diameter)

T-shapedDacronmesh

Removeablemagnet

Page 7: Auditory Brainstem Implant. Electrode array inside cochlea

Position of ABI in the Brainstem

ICP

OLIVE

PB

LM

ABI

CEREBELLUM

Page 8: Auditory Brainstem Implant. Electrode array inside cochlea

VIII

VII IX

VIPons Medulla

FlocculusPC

V.

Tumour

WPS / BLN

Position of ABI in the Brainstem

Page 9: Auditory Brainstem Implant. Electrode array inside cochlea

PenetratingAuditory Brainstem Implant

PABI ElectrodeABI Electrode

8.5mm

Electrode diameter:: 0.7mm

2

3

4

5

6

7

8

9

10

11

12

14

13

15

16

17

18

19

20

21

22

Page 10: Auditory Brainstem Implant. Electrode array inside cochlea

Penetrating ABI Location

Page 11: Auditory Brainstem Implant. Electrode array inside cochlea
Page 12: Auditory Brainstem Implant. Electrode array inside cochlea
Page 13: Auditory Brainstem Implant. Electrode array inside cochlea

Rikke Pedersen 20 y

Page 14: Auditory Brainstem Implant. Electrode array inside cochlea

ABI 24 Advantages and Benefits

• Optimizes stimulation using 21 distinct sites.

• Potential to Confirm placement using NRT.

• Widest choice of Coding strategies.

Page 15: Auditory Brainstem Implant. Electrode array inside cochlea

MRI Considerations

Page 16: Auditory Brainstem Implant. Electrode array inside cochlea

MRIStatic

Magnetic Field(1.5T)

Magnetic SwitchedGradients (20 T/s)

Radio Frequency (RF)

Energy(2-16KW peak

@ 64 MHz)

FORCE in Magnetic components

CURRENT in conductingcomponents

HEAT

Page 17: Auditory Brainstem Implant. Electrode array inside cochlea

Removal of Nucleus 24 ABI Magnet

Page 18: Auditory Brainstem Implant. Electrode array inside cochlea

Tests to Ensure Reliability

Impact Test

Tests to Ensure Reliability

Impact TestCochlear routinely conducts tests to ensure the reliability of our products. For example, the CI24M implant has undergone extreme impact testing to verify ruggedness by simulating a blow to the head of a T-ball travelling at 65.0km/h (40.4mph).Test rig: impact hammer with T-ball with a mass of 3.6 kg (7.9lb), dropped through 450mm (17.7in).

Page 19: Auditory Brainstem Implant. Electrode array inside cochlea

Nucleus 24 Auditory Brainstem Implant

CI24M receiver-stimulator

Monopolarreference electrodes

(ball & plate)

Microcoiled electrodewires

Electrode array(21 platinum disks0.7mm diameter)

T-shapedDacronmesh

Removeablemagnet

Page 20: Auditory Brainstem Implant. Electrode array inside cochlea