Abstract：Objective To investigate the effect of high-flow nasal cannula (HFNC)in spontaneous pneumothorax. Methods From May 2019 to October 2020，80 patients with spontaneous pneumothorax treated in the Fifth People′s Hospital of Ganzhou City were selected as the research objects and divided into the control group and the observation group according to the random number method，with 40 cases in each group. The control group received conventional oxygen delivery，and the observation group received HFNC high flow humidification oxygen delivery. The respiratory rate，heart rate，total compliance rate，time of symptom relief，length of hospital stay and incidence of adverse reactions were compared between the two groups before and after treatment. Results The respiratory rate and heart rate of the observation group 2 h and 2 d after treatment were lower than those of the control group，and the differences were statistically significant (P＜0.05). The total compliance rate of the observation group (97.50%) was higher than that of the control group(77.50%)，and the difference was statistically significant (P＜0.05). The time of symptom relief and length of hospital stay in observation group were shorter than those in control group，and the differences were statistically significant (P＜0.05). The total incidence of adverse reactions in observation group was lower than that in control group，and the difference was statistically significant (P＜0.05). Conclusion HFNC has a significant effect on patients with spontaneous pneumothorax during treatment and can improve patient compliance.
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