Inversions can help clear the upper respiratory tract and drain secretions from the nose, allowing freshly oxygenated blood to flow into the oral cavity.

倒置体式能清理上呼吸道，排出鼻腔内的分泌物，让新鲜富氧的血液循环到口腔。

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There were no significant difference in the prevalence rate of infection among upper respiratory tract, intraabdominal cavity, blood vessel and the other sites infection(P>0.05).

上呼吸道、腹腔内组织、血管相关感染及其他部位感染的差异均无显著性（P>0.05）。

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