Ito M, Ikeda M
First Department of Anatomy, National Defense Medical College, Tokorozawa, Japan.
Undersea Hyperb Med. 1998 Spring;25(1):59-62.
Ninety-seven Japanese military divers from two districts, Mutsu (Northern Japan) and Yokosuka (Central Japan), were examined for the incidence of diver's ear (exostosis of the external auditory canal). The average temperature of sea water of the two districts is different because of their latitude, but the two groups had no significant difference in diving career. The incidence of exostosis in the Mutsu (cold area) group showed a significant increase as the diving career progressed. This tendency was not seen in the Yokosuka (warm area) group. The severity of exostosis increased in divers in both districts. The incidence of exostosis in Mutsu was significantly higher than in Yokosuka. The Mutsu group also showed a higher ratio of exostosis grade 2 than the Yokosuka group. These results may support the hypothesis that cold water facilitates formation of external auditory canal exostosis.
对来自日本陆奥（日本北部）和横须贺（日本中部）两个地区的97名日本海军潜水员进行了潜水员耳病（外耳道外生骨疣）发病率的检查。由于纬度不同，这两个地区的海水平均温度有所差异，但两组潜水员的潜水生涯并无显著差异。陆奥（寒冷地区）组外生骨疣的发病率随着潜水生涯的推进显著增加。而在横须贺（温暖地区）组中未观察到这种趋势。两个地区潜水员外生骨疣的严重程度均有所增加。陆奥地区外生骨疣的发病率显著高于横须贺地区。陆奥组外生骨疣2级的比例也高于横须贺组。这些结果可能支持冷水促进外耳道外生骨疣形成这一假说。
