The nose exhalation gastric tube indwelling method could wide the opening angle of nasal valve area and efficiently judge the opening to increase the success rate of the indwelling gastric tube.
呼气法能增大鼻瓣区开口角度并有效判断开口位置，提高置管成功率。
When deviation occurs anteriorly and inferiorly (that is, in the area of the internal nasal valve), it is more likely to be a source of obstruction.
而当鼻中隔偏曲出现得较为靠前靠下时(即内鼻阀部位)，它可能会成为鼻阻塞出现的原因之一。
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