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Abstract Objective：To investigate the feasibility and safety of multifunctional endoscopic mask oxygen inhalation technology in elderly chronic obstructive pulmonary disease（COPD） patients with the examination of painless gastroscopy.Method：66 patients with COPD in stable phase were selected and randomly divided into the multifunctional endoscopic mask group（group A） and the nasal catheter group（group B），33 cases in each group，all patients were given the examination of painless gastroscopy.The group A was given multifunctional endoscopic mask oxygen inhalation，the group B was given nasal catheter oxygen inhalation.The systolic pressure，diastolic pressure，heart rate and pulse oxygen saturation of the two groups were observed and compared before giving oxygen（T0），after anesthesia and before the examination（T1），during the examination（T2） and after the examination（T3）.The total time of the examination，the times of SpO2<90% and SpO2<80% and the situation of interrupt check were recorded and compared between the two groups.Result：The differences in heart rate and blood pressure of different time between group A and group B were not statistically significant（P>0.05）.In the time of T1，T2 and T3，the values of SpO2 in group A were significantly higher than those in group B.The times of SpO2<90% and SpO2<80% in group A were less than those in group B.The situation of interrupt check and the total time of examination in group A were better than those in group B.The differences above were all statistically significant（P<0.05）.Conclusion：Multifunctional endoscopy mask in elderly COPD patients with the examination of painless gastroscopy can improve patients’ SpO2 and shorten the examination time.It is a safe and effective auxiliary tool of anesthesia.
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