Backgrounds: The Ambu Aura-i laryngeal mask is considered a device for blind intubation as well as for fibreoptic guided intubation.The novel SaCoVLM video laryngeal airway is a supraglottic airway device that allows intubation under direct vision.We hypothesized that success rates for device placement and tracheal intubation with SaCoVLM would be comparable with Ambu Aura-i. Methods:A prospective,randomized clinical trial from March 2021 to December 2021.One hundred and twenty patients were

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... olled and randomized in the study.Direct intubation was performed with SaCoVLM and fibreoptic guided intubation was performed with Ambu Aura-i.Primary outcome measure was first success rate of LMA placement. Secondary outcome measures were the time to device placement and time to endotracheal intubation as well as the time for LMA removal after successful intubation, differences in airway leak pressure, the fiberoptic grade of laryngeal view, and the incidence of blood stain. Results: The first success rate of LMA placement was similar with the two devices.The time for successful endotracheal intubation was no difference in group Ambu Aura-i and group SaCoVLM (24.1s±6.3 versus 25.7s±2.1; p>0.05 ). The time for removal was slower in group SaCoVLM than group Ambu Aura-i(20.8s±0.8 versus 14.7s±6.1; p<0.01 ). The airway leak pressure was higher in group SaCoVLM than group Ambu Aura-i (27.0s±1.0 versus 22.3 s±3.6; p<0.01 ),the incidence of blood stain is higher in group SaCoVLM (16.7%).Conclusion:The SaCoVLM has an overall comparable performance as Ambu Aura-i. However, SaCoVLM is better in direct intubation without the assistance of flexible intubation scope, Which reduced the devices demand.