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Nasal plastic catheter
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Symptomatic treatment of pneumonia includes oxygen therapy, and oxygen should be given immediately if there is dyspnea, wheezing, cyanosis of lips and pale face. The oxygen flow rate of nasal vestibule is 0.5 ~ 1L/min, and the oxygen concentration is less than 40%. Oxygen should be humidified to avoid damaging the cilia of airway epithelial cells. So choose a.