The effects of oral appliance on hypoxemia during sleep under hypoxic condition -from an analysis of respiratory pattern-

从血氧饱和度、脉率、呼吸模式等方面分析口腔矫治器对富士山顶低氧条件下睡眠时低氧血症的影响。结果显示，佩戴口腔矫治器后，SpO2由68%上升至4%左右，脉搏频率下降约5次/分。提示口腔矫治器能在一定程度上改善睡眠时的低氧血症。而ODI、AHI和呼吸型(梗阻型、中央型、混合型)指数虽有下降，但差异无统计学意义。在高海拔地区，中枢性呼吸暂停的发生改变了结果。

The effects of oral appliance on hypoxemia during sleep under hypoxic condition, at the summit of Mt.Fuji, was analyzed from SpO2, pulse rate and respiratory pattern. As results, SpO2 increased from 68％ to about 4％,and pulse rate decreased about 5bpm by application of oral appliance. These results indicate that oral appliance could improve hypoxemia during sleep to some extent. On the other hand, the indexes of ODI, AHI and respiratory patterns (obstructive, central, mixed type) were observed to decrease, but not statistically significant. At the high altitude, central apnea occurs which modify the result.