Abstract: Objective:Observe placed oropharyngeal ventilation tube under intravenous anesthesia abortion profilometry(painless poured) patients clinical application.Methods:600 people painlessly cases were randomly divided into two groups,309 patients(the observation group) with acryloxyethyl tabor phenolic compound fentanyl after intravenous anesthesia by mouth placed oropharyngeal ventilation tube mask oxygen flow of transmutation,descending painless same 291 patients(control group) to take a similar anesthesia surgical method but not placed []oropharyngeal ventilation tube.Observe and record two groups of patients in the process of anesthesia anaesthetic effect,reaction symptoms,including poured syndrome,ody dynamic and snoring breathing,difficulty breathing(a transient proportional desaturation to 90% take torsten jaw or artificial auxiliary oxygen treatment) and in each period of heart rate,blood oxygen saturation and other major life changes signs.Results:Two groups of patients general data,anaesthetic effect no difference compared with all of the patients did not appear poured syndrome;Intraoperative trial group and control group there were 38 cases and 40 patients with mild body move;The observation group without interrupion breathing,only cases appeared in 8 cases occurred sex difficulty breathing,group compared with 80 cases snoring breathing,56 cases occurred sex difficulty breathing,comparison between the two groups was statistically significant(P<0.01),Two groups of each period HR,compare SpO2 was not statistically significant(P>0.05).Conclusion:Placed oropharyngeal ventilation tube can effectively relieve people surgery painlessly caused by intravenous anesthesia tongue in the upper respiratory tract obstruction caused after falling,improve,maintain good ventilation of the safety of the operation.