Consequences of labor on airway outcomes with laryngeal mask in case of cesarean delivery under general anesthesia

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Created On: 07/11/2020

Consequences of labor on airway outcomes with laryngeal mask in case of cesarean delivery under general anesthesia

This cohort study examined the potential effects of labor on airway outcomes with LMA use for cesarean delivery under the influence of general anesthesia.

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Key take away

To study the effect of labor on airway outcomes with laryngeal mask airway (LMA) for cesarean delivery, this cohort study of 584 parturients found that partsurients under labor had augmented incidence of first-attempt LMA insertion failure and oropharyngeal trauma. Labor is not linked with a substantial change in time to effective ventilation in case of LMA for general anesthesia.

Background

This cohort study examined the potential effects of labor on airway outcomes with LMA use for cesarean delivery under the influence of general anesthesia.

Method

Healthy parturients who fasted for more than 4 hours undergoing category 2 or 3 cesarean delivery with LMA under anesthesia were included. The LMA was used as suggested after rapid sequence induction and cricoid pressure. The time to effective ventilation was regarded as the primary outcome.

First-attempt insertion failure, ventilation parameters, mucosal trauma, pulmonary aspiration, oxygen saturation and Apgar scores were regarded as secondary outcome. Alterations between the labor status were verified. Quantitative associations amongst labor status and outcomes were established via univariate logistic regression analysis.

Result

The data from 584 parturients were investigated, out of which 37.8% were in labor. Labor did not considerably affect time to effective ventilation (Table 1):

There was no decrease in oxygen saturation or pulmonary aspiration.

Conclusion

Labor may enhance the number of insertion attempts and oropharyngeal trauma with LMA usage for cesarean delivery in parturients at low risk of difficult airway. The effects of labor on LMA use in high-risk parturients needs to be investigated in the future.