Does topical N-acetylcysteine application after myringotomy cause severe otorrhea?

Area of Science:

• Otolaryngology
• Regenerative Medicine
• Pharmacology

Background:

• Tympanic membrane perforations are common ear conditions.
• Effective treatments for tympanic membrane healing are crucial.
• N-acetylcysteine (NAC) is an antioxidant with potential therapeutic applications.

Purpose of the Study:

• To investigate the effect of topical N-acetylcysteine (NAC) on the healing of experimental tympanic membrane perforations.
• To evaluate whether NAC application influences the rate and success of tympanic membrane closure.

Main Methods:

• Incisional myringotomies were created in guinea pigs.
• Perforations were treated with either saline solution (control) or N-acetylcysteine (NAC).
• Otomicroscopic examinations were performed over nine days to assess perforation healing.

Main Results:

• All perforations in the control group healed within nine days.
• Only 40% of perforations treated with NAC showed complete closure in the same period.
• The NAC group experienced significant otorrhea by the third day.

Conclusions:

• Topical N-acetylcysteine may impede the healing of tympanic membrane perforations.
• NAC application was associated with delayed closure and increased otorrhea.
• Further histopathological studies are needed to understand NAC's impact on tympanic membrane repair.