目的：将改进的口咽通气管用于现场急救并观察其临床效果。
Objective:Effective observation of an improved oropharyngeal airway in emergency on the spot.
结论经口咽通气管内吸痰法较经鼻腔直接吸痰法效果好，且吸痰过程中不影响氧疗效果。
Conclusion Sputum drainage through oropharyngeal airway is more effective than through nasal cavity directly, and it will not affect oxygen therapy during its process.
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