Objectives We sought to describe characteristics of mechanically ventilated pregnant patients, evaluate utilization of low-tidal-volume ventilation (LTVV) and high-tidal-volume ventilation (HTVV) by trimester, and describe maternal and fetal outcomes by ventilation strategy. Study Design This is a retrospective cohort study of pregnant women with mechanical ventilation for greater than 24 hours between July 2012 and August 2020 at a tertiary care academic medical center. We defined LTVV as average daily tidal volume 8 mL/kg of less of predicted body weight, and HTVV as greater than 8 mL/kg. We examined demographic characteristics, maternal and fetal characteristics, and outcomes by ventilation strategy. Results We identified 52 ventilated pregnant women, 43 had LTVV, and 9 had HTVV. Acute respiratory distress syndrome occurred in 73% ( N = 38) of patients, and infection was a common indication for ventilation ( N = 33, 63%). Patients had LTVV more often than HTVV in all trimesters. Obstetric complications occurred frequently, 21% ( N = 11) experienced preeclampsia or eclampsia, and among 43 patients with available delivery data, 60% delivered preterm ( N = 26) and 16% had fetal demise ( N = 7). Conclusion LTVV was utilized more often than HTVV among pregnant women in all trimesters. There was a high prevalence of maternal and fetal morbidity and fetal mortality among our cohort. Key Points Our center utilized low tidal more often than high-tidal-volume ventilation during all trimesters of pregnancy.Prone positioning can be performed at advanced gestations.Infection is a common cause of antepartum ventilation.
Keywords: low-tidal-volume ventilation; mechanical ventilation; obstetric; pregnancy; respiratory illness.
The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution-NonDerivative-NonCommercial License, permitting copying and reproduction so long as the original work is given appropriate credit. Contents may not be used for commercial purposes, or adapted, remixed, transformed or built upon. ( https://creativecommons.org/licenses/by-nc-nd/4.0/ ).