Effects of the second generation laryngeal mask airway under general anesthesia on maternal and neonatal outcomes in cesarean delivery / 中华围产医学杂志

ABSTRACT

Objective:To evaluate the effects of the second generation laryngeal mask airway (LMA) under general anesthesia on maternal and neonatal outcomes in cesarean delivery.Methods:This study retrospectively enrolled 544 patients who underwent cesarean delivery under general anesthesia with airway intervention in Peking University First Hospital between January 2015 and December 2019. Patients were divided into endotracheal tube group (ETT group, n=379) and LMA group (Supreme TM LMA, n=165) according to the airway devices used under general anesthesia. Propensity score matching was carried out using a multivariable logistic regression model and 133 cases of singleton pregnancies were matched in each group. The main outcome was the incidence of neonatal asphyxia at one minute after birth (1 min Apgar score ≤7). The secondary neonatal outcomes were the incidence of severe asphyxia at one minute after birth (1 min Apgar score ≤3) and asphyxia at five minutes after birth (5 min Apgar score ≤7) and the percentage of neonates transferred to neonatal intensive care unit. The secondary maternal outcomes included the incidence of regurgitation, aspiration and hypoxemia, the percentage transferred to intensive care unit, post-operation all-cause morbidity and fatality before discharge. Two independent samples t-test, Mann-Whitney U test and Chi-square test were used for statistical analysis. Results:Two of the 544 (0.4%) patients had difficulty in intubation and one of them was successfully ventilated with LMA after failed intubation. No regurgitation, aspiration or anesthesia-related death was reported. After the propensity score matching, the incidence of neonatal asphyxia at one minute after birth in the LMA group and the ETT group had no significant difference [15.8% (21/133) vs 19.5% (26/133), χ2=0.646, P=0.422]. Moreover, there were no differences between the LMA and ETT group regarding the incidence of severe asphyxia at one minute after birth [2.3% (3/133) vs 3.0% (4/133), χ2<0.001, P>0.999] or asphyxia at five minutes after birth [4.5% (6/133) vs 4.5% (6/133), χ2<0.001, P>0.999], neonatal intensive care unit admission [27.8% (37/133) vs 38.3% (51/133), χ2=3.328, P=0.068], maternal hypoxemia during the operation [1.5% (2/133) vs 4.5% (6/133), χ2=1.160, P=0.281], maternal intensive care unit admission [3.8% (5/133) vs 9.0% (12/133), χ2=3.079, P=0.079] or post-operation all-cause morbidity [2.3% (3/133) vs 2.3% (3/133), χ2=0.171, P=0.680]. Conclusions:Like tracheal intubation, the second generation LMA (Supreme TM) can be used in cesarean section under general anesthesia without increasing the risk of adverse maternal and neonatal outcomes.