Optimal flexible laryngeal mask airway size in children weighing 10 to 20 kg

Comparison of two different flexible laryngeal airway masks in pediatric ophthalmic surgeries: A retrospective study

This study aimed to compare the clinical effects of the Medis flexible laryngeal mask airway (FLMA) with those of the Ambu AuraFlex FLMA in pediatric ophthalmic surgery. A total of 80 patients, aged 1 to 5 years, in American Society of Anesthesiologists I-II, weighing ≥10 kg, and without any existing airway difficulties, were enrolled in this study. The patients were randomly divided into Group M (Medis FLMA) and Group A (Ambu AuraFlex FLMA). The time of insertion, number of attempts, finger assistance required, manipulation, oropharyngeal leak pressure (OLP), fiberoptic grade of view, and complications such as bloodstaining, hoarseness, and sore throat were recorded. Group M showed a significantly higher OLP than did Group A (P = .002); however, Group M required more finger assistance than did Group A (P = .009). There were no statistically significant differences between the 2 groups in terms of insertion time, number of attempts, manipulation, fiberoptic view grade, or complications. Both the Medis and Ambu AuraFlex FLMA can provide smooth ventilation during pediatric ophthalmic surgeries. The Medis FLMA showed a higher OLP than did the Ambu AuraFlex FLMA but required more finger assistance during insertion.

A Prospective Randomized Study for the Placement of Flexible Laryngeal Airway Mask with Two-Step of Jaw-Thrust Technique by Both Hands for Adults

To investigate the effect of two-step of jaw-thrust technique on the placement of flexible laryngeal mask with both hands. 157 patients scheduled for functional endoscopic sinus surgery were divided into two groups using a random number table method: control group (group C, n = 78) and test group (group T, n = 79). After induction of general anesthesia, the traditional method was applied to insert the flexible laryngeal airway mask in group C, and the two-step of jaw-thrust technique with both hands by the nurse was applied to help place the laryngeal mask in group T. The success rate, alignment status, oropharyngeal leak pressure (OLP) of the laryngeal mask, soft tissue injury of the oropharyngeal cavity and postoperative sore throat, and the incidence of adverse airway event were recorded in both groups. Results: The success rate of the first placement of flexible laryngeal masks in group C and group T were 73.8% and 97.5%, and the final success rates were 97.5% and 98.7%, respectively. Compared with group C, the success rate of first placement in group T was higher, and the difference was statistically significant (P < 0.01). There was no significant difference in the final success rate between the two groups (P = 0.56). The alignment score showed that the placement of group T was better than that of group C, and the difference was statistically significant (P < 0.01). The OLP of group C was 22.1 ± 2.6 cmH2O, and the OLP of group T was 25.4 ± 3.8 cmH2O. The OLP of group T was significantly higher than that of group C (P < 0.01). The incidence of mucosal injury and postoperative sore throat in group T were 2.5% and 5.0%, which were significantly lower than that of 23.0% and 16.7% in group C (both P < 0.01). There was no adverse airway event in each group. Conclusion: The two-step of jaw-thrust technique with both hands can improve the success rate of the first placement of the flexible laryngeal mask and the positioning of the laryngeal mask, increase the sealing pressure of the laryngeal mask, and reduce the incidence of oropharyngeal soft tissue injury and postoperative pharyngeal pain.