Clinical efficiency of application of supraglottic jet ventilation in painless colonoscopy

Objective： To explore the efficacy and safety of supraglottic jet ventilation for patients undergoing colonoscopy supported by monitored anesthesia care (MAC). Methods： Forty-nine patients scheduled for painless colonoscopy were randomly divided into two groups: the control group utilizing routine passive oxygen supply with nasal cannula (n=24) and the supraglottic jet ventilation (SJV) group utilizing active oxygen supply with manual jet ventilator (n=25). Anesthesia was induced and maintained by intravenous injection of propofol. HR, BP, and SpO₂ were continuously monitored. Results： There was no significant difference regarding height, weight, age, and body mass index (BMI) between the two groups. The averaged lowest and highest SpO₂in SJV group were significantly higher than those in the control group (P=0.01). Degree of thoracic lifting movement in SJV group was significantly higher than that in control group (P=0.03). There was no significant difference regarding the times for using facial mask ventilation, the propotion of time for maintaining SpO₂ above 96%, average PetCO₂ during the procedure, or complications between the two groups. Conclusions： SJV can provide adequate oxygen supply for patients undergoing painless colonoscopy without obvious complications.