Mitomycin C-associated radiofrequency microelectrocautery used in myringotomy in an animal model
Vanessa Chisté Guimarães Faccini1, Luiz Lavinsky
1Medical School, Federal University of Rio Grande do Sul.
Unlabelled:
This study aimed at describing an alternative surgical technique to the insertion of a ventilation tube in the tympanic membrane: myringotomy by radiofrequency alone and associated with mitomycin C.
Aim:
to show a surgical approach that can be simple to execute, not subject to complications arising from the ventilation tube.
Materials And Methods:
we compared myringotomy by microknife and by radiofrequency microcautery (0.3 mm and 0.7 mm tips) alone and associated with mitomycin C, considering the time of tympanic closure in Wistar rats. Experimental study.
Results:
there was a statistically significant difference between radiofrequency myringotomy and knife myringotomy. As we analyze the radiofrequency approach with the 0.7 mm tip associated with mitomycin C (Wilcoxon test), the p value found was lower than 0.001, showing a statistical significance. The maximum tympanic membrane closure time was 44 days and the median found was 14 days.
Conclusion:
the radiofrequency myringotomy (with the larger diameter tip) associated with mitomycin C enhances the tympanic membrane healing time.
