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Cochlear tolerance of Nd:YAG laser myringotomy
Chul Ho Jang1, Yong Bum Cho, Cheol Hee Choi
1Department of Otolaryngology, Chonnam National University Hospital, Hak-dong 8, Dongku, Gwangju, South Korea. chulsavio@hanmail.net
Aim:
The objective of this study was to assess whether Nd:YAG laser myringotomy has a negative effect on the cochlea.
Materials And Methods:
Ten adult guinea pigs with a normal Preyer's reflex were treated by myringotomy with an Nd:YAG laser (power output 8-10W) under surgical microscopic guidance. Preoperative and immediately postoperative hearing tests were performed using auditory brainstem response. The cochlear hair cells were investigated by scanning electron microscope (SEM).
Results:
The mean postoperative hearing threshold of the auditory brainstem response showed an insignificant elevation. SEM findings revealed normal outer and inner hair cells after laser myringotomy.
Conclusion:
No negative effect of Nd:YAG laser myringotomy on the cochlea was found. From these results, it can be concluded that the Nd:YAG laser is safe and effective for myringotomy.
