A safe and simple oxygen inhalation model during painless gastroscopy

Objective To explore the best ventilation way during the painless gastroscopy.Methods A total of 200 patients with venous compound anesthesia of propofol and fentanyl for painless gastroscopy,were randomized into four groups:group Ⅰ(deep breathing pretreatment+2-3 L/min oxygen flow with inhalation mask);group Ⅱ(deep breathing pretreatment + 4-5 L/min oxygen flow with inhalation mask);group Ⅲ(deep breathing pretreatment + 4-5 L/min oxygen flow with nasal tube);group Ⅳ(4-5 L/min oxygen flow with nasal tube).The respiratory rate and pulse oxygen saturation(SpO2)of patients were recorded before anesthesia,2,5,10 min after anesthesia.Results Respiratory rate of all patients was decreased significantly after anesthesia(P0.05),and returned to the normal at 10 min after anesthesia.SpO2 was decreased significantly 2 min after anesthesia in group Ⅳ and group Ⅲ(P0.05).SpO2 in group Ⅰand groupⅡ was not significantly different before and after anesthesia(P0.05).SpO2 was higher in groups Ⅰ-Ⅲ than that in group Ⅳ(P0.05).The incidence of hypoxemia was significantly lower in group Ⅰ-Ⅲ than that in group Ⅳ(P0.05).Conclusion Oxygen inhalation through a inhalation mask at a speed of 2-3 L/min during the painless gastroscopy is a safe,effective and simple procedure for oxygen supply.