ABSTRACT
Objective To evaluate the feasibility and safety of self designed oral-nasal double channel mask in painless gastroscopy. Methods 400 patients who were given intravenous injection Sublimaze followed by Propofol were divided equally at random into two groups. The patients in control group (n = 200) were inhaled oxygen with snuffle tube (4.0 ~ 5.0 L/min) and the patients in experimental group (n = 200) were inhaled oxygen with a self designed oral-nasal double channel mask. Respiration rate, SpO2, duration of operation and dosage of anaesthetic were recorded before and during operation. Result The SpO2decreased markedly and duration of operation obviously prolonged in group I during operation (P < 0.05), there was no statistical difference between the two groups of the respiration rate and dosage of anaesthetic. Conclusion The application of oxygen inhalation with the self designed oral-nasal double channel mask in painless gastroscopy appeared safer than that of oxygen inhalation via snuffle tube. It can be safely used in painless gastroscopy.