Airway management effect of the new video laryngeal mask airway SaCoVLMTM in lateral laparoscopic urological surgery: A single center randomized controlled trial

There are few pertinent researchs about the application of laryngeal mask airway (LMA) in lateral decubitus surgery. The aims of our study were to evaluate the effects of lateral position and pneumoperitoneum on oropharyngeal leak pressure (OLP) and ventilation efficiency for the LMA SaCoVLM TM . Patients undergoing elective retroperitoneal laparoscopic urological surgery were randomized 1:1 to the Supreme TM group or SaCoVLM TM group. The primary outcome was the OLP with LMA insertion. Secondary outcomes were the first-attempt success rate, insertion time, adjustment times, gastric tube success rate, LMA alignment accuracy, LMA removal time, regurgitation or aspiration, LMA blood staining, and incidence of adverse events 24 hours postoperatively. We recruited 70 patients to complete the study. Regardless of lateral position and pneumoperitoneum, OLP was higher in the SaCoVLM TM group (n = 35) than in the Supreme TM group (n = 35), with a median difference of 4-7 cmH 2 O. The first-attempt success rate of the SaCoVLM TM group was higher than that of the Supreme TM group (91.4% vs. 77.1%, risk ratio (RR): 1.19; 95% CI 0.96 to 1.46, P = 0.188). In the lateral position and pneumoperitoneum, although the new video LMA SaCoVLM TM has a higher OLP than LMA Supreme TM , both devices provide sufficient ventilation efficiency.