Recovery from Sudden Sensorineural Hearing Loss

Understanding the Recovery Process

The American Academy of Otolaryngology-Head and Neck Surgery suggests that a hearing improvement from >120 dB to 85 dB represents significant recovery, which is encouraging given the severity of the initial loss 1, 2.
The decreasing tinnitus and emergence of an echo sensation are actually positive signs that the auditory system is beginning to recover, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 1.

Partial hearing restoration creates an acoustic imbalance, leading to autophony, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 1, 2.
Middle ear fluid or inflammation can cause temporary middle ear effusion or inflammation, altering how sound resonates in the ear canal and middle ear space, according to the American Academy of Otolaryngology-Head and Neck Surgery 3, 4.

A 35 dB improvement in hearing (>120 dB to 85 dB) places a patient in the "significant recovery" category, which occurred in 32-47% of patients in salvage therapy studies, as found by the American Academy of Otolaryngology-Head and Neck Surgery 3, 5.
Decreasing tinnitus correlates with continued recovery, suggesting ongoing resolution of cochlear inflammation, as noted by the American Academy of Otolaryngology-Head and Neck Surgery 1, 2.

Tympanic membrane healing should be complete within 2-4 weeks after the last IT injection, according to the American Academy of Otolaryngology-Head and Neck Surgery 3, 4.
Middle ear fluid resolution typically occurs within 2-6 weeks post-treatment, as reported by the American Academy of Otolaryngology-Head and Neck Surgery 3, 4.
Continued hearing improvement can occur up to 3 months after treatment initiation, with most improvement in the first 2 months, as found by the American Academy of Otolaryngology-Head and Neck Surgery 1, 3.

The American Academy of Otolaryngology-Head and Neck Surgery recommends a follow-up audiogram to be performed after completing treatment and again at 1.5-3 months to document continued recovery 1, 4.
Tympanic membrane inspection should be performed to verify that all injection sites have healed properly and there's no persistent perforation, as suggested by the American Academy of Otolaryngology-Head and Neck Surgery 1, 4.
Tympanometry can identify middle ear fluid or Eustachian tube dysfunction contributing to the echo sensation, according to the American Academy of Otolaryngology-Head and Neck Surgery 3, 4.

The American Academy of Otolaryngology-Head and Neck Surgery recommends steroids for treating sudden sensorineural hearing loss (SSNHL) with associated tinnitus, which may secondarily improve tinnitus symptoms 6

Oral corticosteroids, such as prednisone 1 mg/kg/day (maximum 60 mg/day) for 7-14 days followed by taper, should be initiated within 14 days of symptom onset for SSNHL with associated tinnitus 6
Intratympanic steroids, such as dexamethasone 24 mg/mL or methylprednisolone 40 mg/mL, can be offered as initial therapy when systemic steroids are contraindicated for SSNHL with associated tinnitus 6, 7

Short-term systemic steroid courses (10-14 days) typically cause manageable adverse events, including hyperglycemia, weight gain, insomnia, hypertension, increased appetite, mood swings, and gastric irritation 6, 8
Intratympanic steroids may cause transient pain, dizziness, infection, or persistent tympanic membrane perforation 7

The American Academy of Otolaryngology-Head and Neck Surgery guidelines address steroids only in the context of SSNHL, not isolated tinnitus 9, 6