Liang H, et al. - Researchers conducted a single-center, prospective, randomized controlled study to examine the effectiveness and safety of supraglottic jet oxygenation and ventilation (SJOV) using WEI Nasal Jet tube (WNJ) for obese patients who underwent hysteroscopy under intravenous anesthesia without endotracheal intubation. They randomized 102 obese patients, who were receiving hysteroscopy under intravenous anesthesia, into three groups: Control group maintaining oxygen supply via face masks (100% oxygen, flow at 6 L/min), the WNJ Oxygen Group with WNJ (100% oxygen, flow: 6 L/min) and the WNJ SJOV Group with SJOV via WNJ [Jet ventilator working parameters:100% oxygen supply, driving pressure 0.1 MPa, respiratory rate; (RR): 15 bpm, I/E; ratio 1:1.5]. Outcomes support the efficacy and safety of SJOV in maintaining adequate oxygenation in obese patients under intravenous anesthesia without intubation during hysteroscopy. Probably, supplies of high concentration oxygenation to the supraglottic area, and the high-pressure jet pulse providing effective ventilation mainly attributed to this efficient oxygenation. Although a role of the nasal airway tube supporting collapsed airway by WNJ was also suggested. No increase in gastric distension and the risk of aspiration was observed in correlation with SJOV. SJOV reduces the incidence of the intraoperative involuntary limbs swing, hip twist and cough and hence can increase the safety of surgery.