HSC Section 8_April 2017

TABLE I. Participant Demographics.

Age at Implantation (yrs)

Etiology of Deafness

Duration of Deafness (yrs)

AOI Conversion

Participant

Device

1

5.8

Congenital

5.8

Med-El Synchrony Flex28

2 3

37.5 50.0

SSNHL SSNHL

1.5 6.0

Med-El Concert Flex28 Med-El Concert Flex28

4

8.9

Congenital

8.9

Med-El Concert Flex28

5 6

9.5

Congenital

9.5 4.0

1 1

Med-El Concert Flex28

10.0

Progressive

Med-El Concert Standard

7

48.2

SSNHL

2.5

Med-El Concert Flex28

8 9

39.2 62.9

MD

3.0 0.5

AB HiFocus Mid-Scala

Iatrogenic p NSGY

Med-El Concert Flex28

10

31.9

SSNHL

1.5

Med-El Concert Flex28

11 12

52.0 39.3

SSNHL SSNHL

1.0

Med-El Concert Flex28 Med-El Concert Flex28

11.0

13

38.6

SSNHL

1.0

Med-El Concert Flex24

14 15

49.5 47.3

Ear Sx

2.0 0.9

Cochlear Nucleus 422

Acoustic neuroma

Med-El Concert Flex28

16

35.0

Meningitis

0.8

Cochlear Nucleus 422

17 18

55.0 55.1

SSNHL SSNHL

1.9 1.0

Cochlear Nucleus 422

Med-El Concert Flex24

19

15.0

SSNHL

1.0

Med-El Concert Flex28

20 21

11.4 40.8

Ear Sx

3.0 2.0

1

Cochlear CI24 RE(CA)

SSNHL

AB HiFocus Mid-Scala

22

50.0

Labyrinthitis

5.0

Cochlear Nucleus 422

23

60.9

SSNHL

2.0

Cochlear Nucleus 422

SSNHL 5 sudden sensorineural hearing loss; MD 5 Meniere’s Disease; Sx 5 surgery; p NSGY 5 after neurosurgical procedure; AOI 5 auditory osseoin- tegrated implant; AB 5 Advanced Bionics Cochlear Corporation (NSW, Australia), Advanced Bionics (Valencia, CA, USA), Med-El (Innsbruck, Austria).

and 6-month postactivation intervals. Individual patient scores for each time interval can be found in Figure 2. Pediatric patients are represented with open symbols. Mean CNC word scores were 11.3% (SD 15.6%) preoper- atively, 48.7% (SD 24.2%) at the 3-month postactivation interval, and 44.7% (SD 20.0%) at 6-month postactiva- tion interval. The data were analyzed using a repeated measures analysis of variance (RM-ANOVA) using CNC word score in percent correct as the dependent variable, and test interval (preoperative, 3-month, and 6-month

Testing was completed in quiet in a sound field using recorded stimuli at a calibrated presentation level of 60 dB SPL (A- weighted [SPL(A)]). The contralateral ear was either masked (cen- ter 1) or plugged and muffed (center 2). Speech in noise was meas- ured with the impaired ear-aided and the contralateral ear un- occluded in a 1 5 dB SNR with speech at 65 dB SPL(A). Speech and noise both originated from a single speaker at 0-degree azimuth. Postoperatively, speech understanding in quiet was meas- ured using a direct audio input (DAI) cable (center 1), or as described above with the contralateral ear plugged and muffed (center 2). Patients tested using DAI were asked to set the vol- ume at a comfortable loudness level prior to starting the test. Speech understanding in noise was tested in the aided bilateral condition with the CI in place. All testing was completed using an omnidirectional program with user settings. Each partici- pant was administered one list per condition at each time inter- val. Responses were recorded and scored by the experimenter. All speech perception scores were calculated as percent correct. Due to the combination of retrospective and prospective data, not all participants completed testing at each time interval. Sta- tistical analyses were completed using IBM SPSS Statistical Package 21.0.0 (IBM Corp., Armonk, NY). An alpha level of 0.05 was used to determine statistical significance.

RESULTS Consonant-Nucleus-Consonant Word Understanding in Quiet

Fig. 2. Individual patient scores for CNC words in quiet for the preoperative, 3-month, and 6-month postactivation test intervals. Pediatric patients are represented with open symbols. CNC 5 consonant-nucleus-consonant.

Performance on CNC word test was completed on 20 participants preoperatively and 13 participants at 3-

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