结论：预防性吸入空气负离子可增加耳蜗血流量，改善微循环，因而对保护噪声性耳蜗损伤是有益的。
Conclusion: Prophylactic inhalation of negative air ions can increase the cochlear blood flow and promote microcirculation thus protecting the cochlea from acoustic trauma.
结论预防性使用丁咯地尔可以减轻噪声对豚鼠耳蜗的损害，对噪声引起的听力损伤可能有一定的保护作用。
Conclusion Preventive use of Buflomedil could alleviate noise-induced damage to outer hair cells in guinea pigs, and could protect against noise-induced hearing loss to some extent.
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