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[Hearing disorders following spinal anesthesia].

O Michel1, T Brusis

  • 1Klinik und Poliklinik für Hals-Nasen-Ohren-Heilkunde der Universität zu Köln.

Regional-Anaesthesie
|August 1, 1991
PubMed
Summary
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Hearing loss can occur after spinal anesthesia, myelography, and dural puncture. This rare complication may not fully resolve in some individuals, potentially linked to inner ear anatomy.

Area of Science:

  • Neurology
  • Otolaryngology

Background:

  • Hearing loss is a rare reported complication following spinal anesthesia.
  • Previous reports indicated complete recovery from hearing impairment.

Observation:

  • Nine cases of hearing loss following spinal anesthesia, myelography, and dural puncture were analyzed.
  • Three patients experienced incomplete or no recovery of hearing.
  • Hearing impairment was primarily observed in lower frequencies (30-40 dB) and often bilateral.

Findings:

  • Hearing loss may be irreversible in some cases, unlike previously reported instances.
  • A patent aquaeductus cochleae is hypothesized as a predisposing factor for persistent hearing loss.
  • The risk of this complication is not predictable for individuals.

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Implications:

  • Transient hearing loss may be underdiagnosed, especially when overshadowed by severe post-dural puncture syndrome symptoms.
  • The use of finer needles during procedures may reduce cerebrospinal fluid leakage and lower the incidence of hearing loss.
  • Further research is needed to understand the underlying mechanisms and predict individual risk for hearing loss post-procedure.