COCHLEAR IMPLANTS use deafness for child

Cochlear implant

1. COCHLEAR IMPLANTS

2. Introduction

3. Preoperative evaluation Initial Screening with PTA and Speech discrimination. Final candidacy determination by HINT(hearing in noice test) and CNC(consonant/nucleus/consonant) Hearing in Noise Test sentence scores of less than 60% in quiet, CNC scores of less than 30% are used as general candidacy guidelines .

4. EARLY SPEECH PERCEPTION (ESP) TEST Distinguish patterns in speech ("ball" versus "cookie" versus "airplane" versus "ice cream cone"), Identify spondee words ("hot dog," "cowboy,“ "airplane"), and To discriminate monosyllabic words ("ball", "boot", "boat", "bat"). It is useful for children who have developed some language skills.

5. Medical evaluation Radiographic imaging of the temporal bone should be obtained in order to identify any potential anatomic variations that might contrai n dicate the operation or require alterations to the usual surgical procedure .

6. CT Anatomy of facial nerve and fallopian canal Defect of cribiform area Enlarged cochlear aqueduct Presence of round or oval window MRI Morphology of cochlea and semicircular canals Potency of cochlear duct Status of cochlear nerve Defect of the modiolar Enlarged vestibular aqueduct CNS abnormalities

7. Psychological evaluation The purpose of a psychosocial evaluation is to determine the intellectual ability of the child. To establish the child's expectations for postimplant performance, and identify family issues that may affect imp l antation or post- im plant performance.

8. General considerations Which Ear to implant Age of implantation Candidacy guidelines Auditory neuropathy Bilateral implantation Hybrid/Electro-acoustic implants Device selection

9. Surgical procedure

10. Post-operative complications Early complications Late complications Special problems

11. Revision surgery

12. Post-operative consideration for surgeons