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  • Title: Frequency-specific efficacy of intratympanic steroid on idiopathic sudden sensorineural hearing loss.
    Author: Suzuki H, Ohbuchi T, Do BH, Nguyen TN, Wakasugi T, Ohkubo JI, Kitamura T.
    Journal: Acta Otolaryngol; 2020 Sep; 140(9):756-760. PubMed ID: 32493084.
    Abstract:
    Background: Hearing recovery would be different in each sound frequency in patients with idiopathic sudden sensorineural hearing loss (ISSNHL).Aims/objectives: To analyze frequency-specific efficacy of intratympanic steroid on ISSNHL.Materials and methods: Of a total of 381 patients with ISSNHL (hearing threshold ≥40 dB; ≤30 days until treatment), 174 patients (174 ears) received systemic steroid plus hyperbaric oxygen therapy (HBO group), and 207 patients (208 ears) received systemic plus intratympanic steroid (IT group). Hearing thresholds at 125-8000 Hz were measured at every octave before and after treatment.Results: % of patients with hearing gains ≥10 dB in the IT group was significantly higher for 500 Hz and the average of 5 mid-frequencies, tended to be higher for 1000 Hz, but was significantly lower for 8000 Hz, compared to the HBO group. Multiple regression analysis showed that hearing recovery was negatively correlated with patients' age for 125/2000/4000/8000 Hz and with days from onset to treatment for all frequencies, and also revealed better hearing recovery at 500/1000 Hz in the IT group than in the HBO group.Conclusions: Intratympanic steroid is more effective than hyperbaric oxygen to yield better hearing outcomes at mid-frequencies and would be advantageous to restore sound/speech perception.Significance: Superiority of intratympanic steroid over hyperbaric oxygen for treating ISSNHL was verified.
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