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Noise level of drilling instruments during mastoidectomy
1Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, Korea. hokilee@yumc.yonsei.ac.kr
Yonsei Medical Journal
|September 16, 1999
Summary
Noise from drilling instruments during mastoidectomy can reach 83 dBA. While below Korean regulations, surgeons should use ear protection due to prolonged exposure and varying susceptibility to noise-induced hearing loss.
Area of Science:
- Otolaryngology
- Occupational Health
- Audiology
Background:
- Excessive noise exposure is a known risk factor for hearing impairment.
- Increasing societal concern exists regarding noise pollution, including within operating rooms.
- Mastoidectomy procedures involve the use of high-speed drilling instruments.
Purpose of the Study:
- To measure and analyze noise levels produced by drilling instruments during mastoidectomy.
- To assess operator exposure to sound levels during this surgical procedure.
- To provide recommendations for hearing protection for otologic surgeons.
Main Methods:
- A noise level study was conducted in the operating room during mastoidectomy.
- A sound level meter was used to measure decibel (dBA) levels.
- Noise data was analyzed using a sound-analyzing program.
- Specific drilling instruments (Stryker, Midas, M.P.S., Med-Next) were evaluated.
Main Results:
- Operator sound exposure ranged from 69 to 83 dBA.
- The Midas drilling instrument generated the highest average sound level at 83 dBA.
- The mean exposure time during mastoidectomy was 41 minutes.
- Measured noise levels were below current occupational noise regulations in Korea.
Conclusions:
- Despite being below regulatory limits, prolonged exposure to drilling noise poses a risk.
- Individual susceptibility to noise-induced hearing loss varies.
- Ear protection is recommended for otologic surgeons operating high-speed drilling instruments during mastoidectomy.