Electric-acoustic stimulation with longer electrodes for potential deterioration in low-frequency hearing

Figures & data

Table 1. Summary of subject characteristics and hearing preservation outcomes.

Patient No.	Gender	Implanted age (years)	Implanted side	Responsible gene	Pre-op LFA (dB)	6M post-op LFA (dB)	HP numerical scale (%)	HP classification	CDL (mm)	Insertion depth
										angle (degrees)
1	F	12	L	SLC26A4	63.3	70.0	70.8	Partial	NA	NA
2	F	9	L	SLC26A4	50.0	65.0	62.5	Partial	NA	NA
3	M	50	L	CDH23	50.0	56.7	78.6	Complete	35.4	540
4	F	31	L	Unknown	45.0	61.7	67.7	Partial	34	570.8
		31	R		46.7	56.7	75.9	Complete	33.3	590
5	F	57	R	Unknown	38.3	65.0	59.0	Partial	33.1	595.4
6	F	55	R	Unknown	26.7	55.0	68.4	Partial	34.4	561.2
7	M	21	R	LOXHD1	33.3	66.7	37.2	Partial	34.2	568.3
8	F	14	R	CDH23	56.7	48.3	100.0	Complete	35.4	538
9	M	20	L	Unknown	51.7	73.3	48.1	Partial	33.5	585.4
10	M	64	R	Unknown	51.7	58.3	82.1	Complete	32.1	621.4

Figure 1. Individual air-conduction hearing thresholds. The dashed and solid lines indicate pre- and 6 months post-op, respectively. Electrode array illustrations represent insertion depth.

Figure 2. Average air-conduction hearing thresholds. The dashed and solid lines indicate pre- and 6 months post-op, respectively. Gray and black lines show the individual and mean, respectively.

Figure 3. Characteristic frequency of each electrode with the default setting (gray square), FLEX28 (orange circles) and FLEX24 (green circles) (n = 9).

Figure 4. Case 4: the right ear. (A) Audiograms at activation and 1 year later. Electrode array illustrations represent insertion depth. (B) Post-op X-ray findings. Numbers indicate channels. (C) Imaging for each electrode location and the reference tonotopic map.

Note: (C) Copyright license agreement was accepted [9].

Figure 5. Case 8. (A) Pre- and 6 months post-op audiograms. Electrode array illustrations represent insertion depth. (B) Post-op X-ray findings. Numbers indicate channels. (C) Imaging for each electrode location and the reference tonotopic map.

Note: (C) Copyright license agreement was accepted [9].

Usami S, Moteki H, Suzuki N, et al. Achievement of hearing preservation in the presence of an electrode covering the residual hearing region. Acta Otolaryngol. 2011;131(4):405–412.

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