What is the role of vasodilators for the treatment of sudden hearing loss?

Updated: Aug 28, 2019
  • Author: Neeraj N Mathur, MBBS, MS, DNB(ENT), MNAMS, FAMS; Chief Editor: Arlen D Meyers, MD, MBA  more...
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Theoretically, vasodilators improve the blood supply to the cochlea, reversing hypoxia. In general, these are agents with effects on the systemic vasculature. Papaverine, histamine, nicotinic acid, procaine, niacin, and carbogen (5% carbon dioxide) have been used in attempts to improve cochlear blood flow. Carbogen inhalation has been shown to increase perilymph oxygen tension. Carbogen has also increased measured transcutaneous and subcutaneous oxygen tension without significantly affecting carbon dioxide tension. A study found that the efficiency of carbogen combined with drugs is superior to drug therapeutics in the treatment of sudden deafness. [15]

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