Characteristics, Outcomes, and Predictability of Critically Ill Obstetric Patients: A Multicenter Prospective Cohort Study

Maternal oxygenation and fetal-neonatal mortality among patients with COVID-19 requiring advanced respiratory support in ICU: A multicenter prospective cohort study

OBJECTIVE

To explore the association of maternal characteristics, oxygenation, and mechanical ventilatory parameters with fetal and neonatal outcomes.

METHODS

The present study was a multicenter, binational (Argentina/Colombia), prospective, cohort study, conducted in 21 intensive care units (ICUs) and including pregnant or postpartum patients with COVID-19 pneumonia requiring advanced respiratory support and their fetuses/neonates. Advanced respiratory support was defined as high-flow nasal cannula (HFNC), non-invasive ventilation (NIV) or invasive mechanical ventilation (IMV).

RESULTS

A total of 91 patients were admitted to 21 ICUs: 63 (69%) antepartum and 28 (31%) postpartum. Among those admitted antepartum (63), delivery was induced in 43 (68.3%), being the reasons mostly maternal (28/43; 65.1%). Of 71 births, 64 (90%) were preterm. A total of 14 fetal/neonatal losses (14/91;15.4%) occurred. The main differences between patients whose fetuses/neonates survived versus those who did not survive were in APACHE II (12 [7-15] vs. 16.5 [14-20]; P = 0.003), SOFA24 (4 [3-5] vs. 6.5 [5-8]; P = 0.001), gestational age at delivery (32.9 ± 3 vs. 27.6 ± 6.2; P = 0.014), acute respiratory distress syndrome (54 [70.1%] vs. 14 [100%]; P = 0.011), septic shock (26 [33.8%] vs. 9 [64.3%]; P = 0.031), IMV (55 [71.4%] vs. 14 [100%]; P = 0.019) and plateau pressure before delivery (23 [21-26] vs. 28 [27-30]; P = 0.019). The incidence of fetal/neonatal mortality among 47 pregnant patients requiring IMV with SpO2 < 95% versus SpO2 >95% before intubation was 12/35 (34.28%) versus 1/12 (8.33%), respectively; P = 0.163. The incidence of fetal/neonatal mortality among those with SpO2 <95% versus SpO2 >95% before delivery was 5/18 (27.77%) versus 8/29 (25.58%), respectively; P = 0.999.

CONCLUSION

The vast majority of births were preterm. Among patients admitted antepartum, most deliveries were induced for maternal reasons. Fetal/neonatal losses were associated with gestational age at delivery, maternal severity of illness on admission and certain ventilatory parameters but not with maternal oxygenation, as is commonly the focus in these patients.

Maternal education and its association with maternal and neonatal adverse outcomes in live births conceived using medically assisted reproduction (MAR)

BACKGROUND

To examine the association between maternal education and adverse maternal and neonatal outcomes in women who conceived using medically assisted reproduction, which included fertility medications, intrauterine insemination, or in vitro fertilization.

METHODS

We conducted a retrospective cohort study utilizing the US Vital Statistics data set on national birth certificates from 2016 to 2020. Women with live, non-anomalous singletons who conceived using MAR and had education status of the birthing female partner recorded were included. Patients were stratified into two groups: bachelor's degree or higher, or less than a bachelor's degree. The primary outcome was a composite of maternal adverse outcomes: intensive care unit (ICU) admission, uterine rupture, unplanned hysterectomy, or blood transfusion. The secondary outcome was a composite of neonatal adverse outcomes: neonatal ICU admission, ventilator support, or seizure. Multivariable modified Poisson regression models with robust error variance adjusted for maternal age, race, marital status, prenatal care, smoking during pregnancy, neonatal sex, and birth year estimated the relative risk (RR) of outcomes with a 95% confidence interval (CI).

RESULTS

190,444 patients met the inclusion criteria: 142,943 had a bachelor's degree or higher and 47,501 were without a bachelor's degree. Composite maternal adverse outcomes were similar among patients with a bachelor's degree (10.1 per 1,000 live births) and those without a bachelor's degree (9.4 per 1,000 live births); ARR 1.05, 95% CI (0.94-1.17). However, composite adverse neonatal outcomes were significantly lower in women with a bachelor's degree or higher (94.1 per 1,000 live births) compared to women without a bachelor's degree (105.9 per 1,000 live births); ARR 0.91, 95% CI (0.88-0.94).

CONCLUSIONS

Our study demonstrated that lower maternal education level was not associated with maternal adverse outcomes in patients who conceived using MAR but was associated with increased rates of neonatal adverse outcomes. As access to infertility care increases, patients who conceive with MAR may be counseled that education level is not associated with maternal morbidity. Further research into the association between maternal education level and neonatal morbidity is indicated.

Prognostic scores for prediction of maternal near miss and maternal death after admission to an intensive care unit: A narrative review

Near miss morbidity and maternal death (defined as severe maternal outcomes - SMO) are the most important adverse outcomes in obstetric settings to assess delays and characteristics of health care management. Intensive care units (ICUs) represent an opportunity of adequate care for women who, in several cases, experienced earlier clinical delays in their maternal health care management. Some prognostic scores widely used in ICU have been useful in characterizing patients in terms of severity of illness in clinical studies, for evaluation of ICU performance, in quality improvement initiatives and for benchmark purposes. Prediction of SMO during the admission to the ICU could greatly improve obstetric care management. We reviewed the feasibility of the existing ICU clinical and obstetric prediction scores in predicting maternal near miss and maternal death.

Social determinants and exposure to intimate partner violence in women with severe acute maternal morbidity in the intensive care unit: a systematic review

BACKGROUND

Studying severe acute maternal morbidity in the intensive care unit improves our understanding of potential factors affecting maternal health.

AIM

To review evidence on maternal exposure to intimate partner violence and social determinants of health in women with severe acute maternal morbidity in the intensive care unit.

METHODS

The protocol for this review was registered in PROSPERO (registration number CRD42016037492). A systematic search was performed in MEDLINE, CINAHL, ProQuest, LILACS and SciELO using the search terms "intensive care unit", "intensive care", "critical care" and "critically ill" in combination with "intimate partner violence", "social determinants of health", "severe acute maternal morbidity", pregnancy, postpartum and other similar terms. Eligible studies were (i) quantitative, (ii) published in English and Spanish, (iii) from 2000 to 2021, (iv) with data related to intimate partner violence and/or social determinants of health, and (v) investigating severe acute maternal morbidity (maternity patients treated in the intensive care unit during pregnancy, childbirth or within 42 days of pregnancy termination). Of 52,866 studies initially identified, 1087 full texts were assessed and 156 studies included. Studies were independently assessed by two reviewers for screening, revision, quality assessment and abstracted data. Studies were categorised into high/middle/low-income countries and summarised data were presented using a narrative description, due to heterogenic data as: (i) exposure to intimate partner violence and (ii) social determinants of health.

RESULTS

One study assessed intimate partner violence among mothers with severe acute maternal morbidity in the intensive care unit and found that women exposed to intimate partner violence before and during pregnancy had a nearly four-fold risk of severe acute maternal morbidity requiring ICU admission. Few social determinants of health other than age were reported in most studies.

CONCLUSION

This review identified a significant gap in knowledge concerning intimate partner violence and social determinants of health in women with severe acute maternal morbidity in the intensive care unit, which is essential to better understand the complete picture of the maternal morbidity spectrum and reduce maternal mortality.

Association Between Socioeconomic Status and Outcomes in Critical Care: A Systematic Review and Meta-Analysis

OBJECTIVES

Socioeconomic status is well established as a key determinant of inequalities in health outcomes. Existing literature examining the impact of socioeconomic status on outcomes in critical care has produced inconsistent findings. Our objective was to synthesize the available evidence on the association between socioeconomic status and outcomes in critical care.

DATA SOURCES

A systematic search of CINAHL, Ovid MEDLINE, and EMBASE was undertaken on September 13, 2022.

STUDY SELECTION

Observational cohort studies of adults assessing the association between socioeconomic status and critical care outcomes including mortality, length of stay, and functional outcomes were included. Two independent reviewers assessed titles, abstracts, and full texts against eligibility and quality criteria.

DATA EXTRACTION

Details of study methodology, population, exposure measures, and outcomes were extracted.

DATA SYNTHESIS

Thirty-eight studies met eligibility criteria for systematic review. Twenty-three studies reporting mortality to less than or equal to 30 days following critical care admission, and eight reporting length of stay, were included in meta-analysis. Random-effects pooled analysis showed that lower socioeconomic status was associated with higher mortality at less than or equal to 30 days following critical care admission, with pooled odds ratio of 1.13 (95% CIs, 1.05-1.22). Meta-analysis of ICU length of stay demonstrated no significant difference between socioeconomic groups. Socioeconomic status may also be associated with functional status and discharge destination following ICU admission.

CONCLUSIONS

Lower socioeconomic status was associated with higher mortality following admission to critical care.

Ventilatory Parameters in Obstetric Patients With COVID-19 and Impact of Delivery: A Multicenter Prospective Cohort Study

BACKGROUND

Current evidence on obstetric patients requiring advanced ventilatory support and impact of delivery on ventilatory parameters is retrospective, scarce, and controversial.

RESEARCH QUESTION

What are the ventilatory parameters for obstetric patients with COVID-19 and how does delivery impact them? What are the risk factors for invasive mechanical ventilation (IMV) and for maternal, fetal, and neonatal mortality?

STUDY DESIGN AND METHODS

Prospective, multicenter, cohort study including pregnant and postpartum patients with COVID-19 requiring advanced ventilatory support in the ICU.

RESULTS

Ninety-one patients were admitted to 21 ICUs at 29.2 ± 4.9 weeks; 63 patients (69%) delivered in ICU. Maximal ventilatory support was as follows: IMV, 69 patients (76%); high-flow nasal cannula, 20 patients (22%); and noninvasive mechanical ventilation, 2 patients (2%). Sequential Organ Failure Assessment during the first 24 h (SOFA₂₄) score was the only risk factor for IMV (OR, 1.97; 95% CI, 1.29-2.99; P = .001). Respiratory parameters at IMV onset for pregnant patients were: mean ± SD plateau pressure (PP), 24.3 ± 4.5 cm H₂O; mean ± SD driving pressure (DP), 12.5 ± 3.3 cm H₂O; median static compliance (SC), 31 mL/cm H₂O (interquartile range [IQR], 26-40 mL/cm H₂O); and median Pao₂ to Fio₂ ratio, 142 (IQR, 110-176). Respiratory parameters before (< 2 h) and after (≤ 2 h and 24 h) delivery were, respectively: mean ± SD PP, 25.6 ± 6.6 cm H₂O, 24 ± 6.7 cm H₂O, and 24.6 ± 5.2 cm H₂O (P = .59); mean ± SD DP, 13.6 ± 4.2 cm H₂O, 12.9 ± 3.9 cm H₂O, and 13 ± 4.4 cm H₂O (P = .69); median SC, 28 mL/cm H₂O (IQR, 22.5-39 mL/cm H₂O), 30 mL/cm H₂O (IQR, 24.5-44 mL/cm H₂O), and 30 mL/cm H₂O (IQR, 24.5-44 mL/cm H₂O; P = .058); and Pao₂ to Fio₂ ratio, 134 (IQR, 100-230), 168 (IQR, 136-185), and 192 (IQR, 132-232.5; P = .022). Reasons for induced delivery were as follows: maternal, 43 of 71 patients (60.5%); maternal and fetal, 21 of 71 patients (29.5%); and fetal, 7 of 71 patients (9.9%). Fourteen patients (22.2%) continued pregnancy after ICU discharge. Risk factors for maternal mortality were BMI (OR, 1.10; 95% CI, 1.006-1.204; P = .037) and comorbidities (OR, 4.15; 95% CI, 1.212-14.20; P = .023). Risk factors for fetal or neonatal mortality were gestational age at delivery (OR, 0.67; 95% CI, 0.52-0.86; P = .002) and SOFA₂₄ score (OR, 1.53; 95% CI, 1.13-2.08; P = .006).

INTERPRETATION

Contrary to expectations, pregnant patient lung mechanics were similar to those of the general population with COVID-19 in the ICU. Delivery was induced mainly for maternal reasons, but did not change ventilatory parameters other than Pao₂ to Fio₂ ratio. SOFA₂₄ score was the only risk factor for IMV. Maternal mortality was associated independently with BMI and comorbidities. Risk factors for fetal and neonatal mortality were SOFA₂₄ score and gestational age at delivery.

Sex and Gender in Lung Diseases and Sleep Disorders: A State-of-the-Art Review: Part 2

There is now ample evidence that differences in sex and gender contribute to the incidence, susceptibility, presentation, diagnosis, and clinical course of many lung diseases. Some conditions are more prevalent in women, such as pulmonary arterial hypertension and sarcoidosis. Some life stages-such as pregnancy-are unique to women and can affect the onset and course of lung disease. Clinical presentation may differ as well, such as the higher number of exacerbations experienced by women with cystic fibrosis (CF), more fatigue in women with sarcoidosis, and more difficulty in achieving smoking cessation. Outcomes such as mortality may be different as well, as indicated by the higher mortality in women with CF. In addition, response to therapy and medication safety may also differ by sex, and yet, pharmacogenomic factors are often not adequately addressed in clinical trials. Various aspects of lung/sleep biology and pathobiology are impacted by female sex and female reproductive transitions. Differential gene expression or organ development can be impacted by these biological differences. Understanding these differences is the first step in moving toward precision medicine for all patients. This article is the second part of a state-of-the-art review of specific effects of sex and gender focused on epidemiology, disease presentation, risk factors, and management of selected lung diseases. We review the more recent literature and focus on guidelines incorporating sex and gender differences in pulmonary hypertension, CF and non-CF bronchiectasis, sarcoidosis, restless legs syndrome and insomnia, and critical illness. We also provide a summary of the effects of pregnancy on lung diseases and discuss the impact of sex and gender on tobacco use and treatment of nicotine use disorder.

Frequency and Results of Pregnancy Screening in Critically Ill Adolescents in Multiple Health Care Organizations

PURPOSE

Adolescent females may undergo pregnancy screening while receiving critical care services, but the frequency and results are unknown. The objectives of this study are to evaluate patient characteristics, pregnancy screening frequency, and rate of positive pregnancy screens in adolescent females of childbearing age who require critical care services. We hypothesize that when adolescent pregnancy screening is performed in the critical care setting, it occurs in a higher frequency in older subjects.

METHODS

This is a multicenter retrospective observational cohort study utilizing TriNetX, an electronic health record database. The following electronic health record data were collected and evaluated in adolescent females aged 12-18 years and billed for critical care services: age, race, ethnicity, diagnostic codes, selected radiology and surgical procedure codes, number of deaths, pregnancy screening laboratory codes, and pregnancy screening results.

RESULTS

A total of 5,241 subjects (2,242 [42.8%] subjects for whom pregnancy screen was noted and 2,999 [57.2%] subjects for whom it was not noted) were included in this study. Subjects aged 15-18 years (odds ratio = 1.56, 95% confidence interval = 1.38-1.77, p value < .0001) and had Hispanic or Latina ethnicity (odds ratio = 1.46, 95% confidence interval = 1.28-1.66, p value < .0001) had a higher association with pregnancy screening. A positive pregnancy screen was identified in 18 (0.8%) subjects.

DISCUSSION

In our study, positive pregnancy screens were infrequent, not all subjects were screened, and there was an association between pregnancy screening and ethnicity. Because of the potential for screening bias, this study suggests that clinicians should strongly consider routine pregnancy screening for all females of childbearing age and that hospital policies should require this type of screening.

Comparison of the CIPHER prognostic model with the existing scores in predicting severe maternal outcomes during intensive care unit admission

OBJECTIVE

To compare the performance of the Collaborative Integrated Pregnancy High-Dependency Estimate of Risk (CIPHER) model in predicting maternal death and near-miss morbidity (Severe Maternal Outcome [SMO]) with the Sequential Organ Failure Assessment (SOFA), the Acute Physiology and Chronic Health Evaluation (APACHE) II, and the Simplified Acute Physiology Score (SAPS) III scores.

METHODS

A retrospective and a prospective study was conducted at two centers in Brazil. For each score, area under curve (AUC) was used and score calibration was assessed using the Hosmer-Lemeshow statistic (H-L) test and the standardized mortality ratio (SMR).

RESULTS

A cohort of 590 women was analyzed. A SMO was observed in 216 (36.6%) women. Of these, 13 (2.2%) were maternal deaths and 203 (34.4%) met one or more maternal near-miss criteria. The CIPHER model did not show significant diagnostic ability (AUC 0.52) and consequently its calibration was poor (H-L P<0.05). The SAPS III had the best performance (AUC 0.77, H-L P>0.05 and SMR 0.85).

CONCLUSION

The performance of the CIPHER model was lower compared to the other scores. Since the CIPHER model is not ready for clinical use, the SAPS III score should be considered for the prediction of SMO.

Prognosticating Fetomaternal ICU Outcomes

Although no scoring system is as yet fully validated for predicting maternal outcomes in critically ill obstetric patients, prognostication may be done objectively using severity predicting models. General critical care scoring systems which have been studied in obstetric patients are outcome prediction models (Acute Physiology and Chronic Health Evaluation [APACHE] I-IV, Simplified Acute Physiology Score [SAPS] I-III, Mortality Probability Model [MPM] I-IV) and organ dysfunction scores (Multiple Organ Dysfunction Score [MODS], Logistic Organ Dysfunction Score [LODS], Sequential Organ Failure Assessment [SOFA]). General critical care scoring systems may overpredict mortality rates in obstetric patients secondary to an altered physiology of organ systems during pregnancy. Obstetric prediction models were developed keeping in mind the physiological characteristics of obstetric population. They are Modified Early Obstetric Warning System (MEOWS), Obstetric Early Warning Score (OEWS), Maternal Early Warning Trigger (MEWT), and disease-specific obstetric scoring systems. The APACHE II model and MPM II are most often used scoring systems for predicting maternal mortality. The SOFA model is the best predictive model for sepsis in obstetrics. APACHE II and SAPS are more useful for nonobstetric population. Recent studies have also underscored the applicability of the OEWS in intensive care unit (ICU) settings with results comparable to the more elaborate APACHE II and SOFA scores. The Early Warning System helps in identifying acutely deteriorating pregnant and postpartum women in non-ICU settings who may require critical care. Fetal outcomes are largely dependent upon maternal outcomes. Prognostic systems applied to mothers may help in estimation of perinatal mortality and morbidity.

Prognostic Value of an Estimate-of-Risk Model in Critically Ill Obstetric Patients in Brazil

The CIPHER (Collaborative Integrated Pregnancy High-Dependency Estimate of Risk) prognostic model was not predictive of risk of death, prolonged organ support, or lifesaving intervention among critically ill patients in Brazil.

To externally validate the CIPHER (Collaborative Integrated Pregnancy High-Dependency Estimate of Risk) prognostic model for pregnant and postpartum women admitted to the intensive care unit.

Predictability of adverse outcomes in hypertensive disorders of pregnancy: a multicenter prospective cohort study

OBJECTIVES

To explore variables associated with adverse maternal/fetal/neonatal outcomes among pregnant/postpartum patients admitted to ICU for hypertensive disorders of pregnancy (HDP).

METHODS

Multicenter, prospective, national cohort study.

RESULTS

Variables independently associated with maternal/fetal/neonatal mortality among 172 patients were as follows: Acute Physiology and Chronic Health Evaluation-II (APACHE-II)(OR1.20[1.06-1.35]), gestational age (OR0.698[0.59-0.82]) and aspartate aminotransferase (AST)(OR1.004[1.001-1.006]). Positive likelihood ratio for headache, epigastric pain, and visual disturbances to predict composite adverse outcomes were 1.23(1.16-1.30), 0.76(0.59-1.02), and 1.1(0.98-1.2), respectively.

CONCLUSIONS

Maternal/fetal mortality due to HDP was independently associated with severity of illness on admission, gestational age, and elevated AST. Accuracy of clinical symptoms to predict composite adverse outcomes was low.

A Detailed Review of Critical Care Considerations for the Pregnant Cardiac Patient

Maternal cardiovascular disease is a leading cause of maternal death worldwide and recently, maternal mortality has increased secondary to cardiovascular causes. Maternal admissions to critical care encompass 1%-2% of all critical care admissions, and although not common, the management of the critically ill pregnant patient is complex. Caring for the critically ill pregnant cardiac patient requires integration of pregnancy-associated physiologic changes, understanding pathophysiologic disease states unique to pregnancy, and a multidisciplinary approach to timing around delivery as well as antenatal and postpartum care. Herein we describe cardiorespiratory changes that occur during pregnancy and the differential diagnosis for cardiorespiratory failure in pregnancy. Cardiorespiratory diseases that are either associated or exacerbated by pregnancy are highlighted with emphasis on perturbations secondary to pregnancy and appropriate management strategies. Finally, we describe general management of the pregnant cardiac patient admitted to critical care.

Racial/Ethnic Disparities in Intensive Care Admissions in a Pregnant and Postpartum Population, Hawai'i, 2012-2017

OBJECTIVE

Maternal morbidity and mortality is a global concern despite advances in medical care and technology and improved economic resources of nations worldwide. The primary objective of our study was to describe racial/ethnic disparities in severe maternal morbidity by using admission to an intensive care unit (ICU) as a marker. The secondary objective was to evaluate associations between patient characteristics, including obstetric outcomes, and severe maternal morbidity.

METHODS

This retrospective cohort study used a large inpatient database to identify pregnancy and postpartum hospitalizations in Hawai'i from January 2012 through September 2017. We evaluated associations between sociodemographic and clinical characteristics and race/ethnicity by using χ² tests. We used multivariable logistic regression to assess associations between race/ethnicity and ICU admission. We used a post hoc analysis to assess associations between ICU admission and obstetric outcomes by race/ethnicity.

RESULTS

After adjustment, we found a significantly higher ICU admission rate among Asian (adjusted odds ratio [aOR] = 1.30; 95% CI, 1.04-1.62; P = .02), Filipino (aOR = 1.45; 95% CI, 1.17-1.79; P < .001), and Native Hawaiian/Other Pacific Islander (aOR = 1.39; 95% CI, 1.15-1.68; P < .001) women compared with non-Hispanic White women. Multiple clinical characteristics and outcomes were associated with ICU admission, such as preexisting chronic conditions and pregnancy-induced hypertensive disorders.

CONCLUSION

We found that severe maternal morbidity represented by ICU admission is higher among Asian, Filipino, and Native Hawaiian/Other Pacific Islander women than among non-Hispanic White women in Hawai'i. Our findings reemphasize the need for health care providers to be vigilant in caring for members of racial/ethnic minority groups and managing their comorbidities.

Pregnant adolescents admitted to the intensive care unit have better outcomes than pregnant adult women: A retrospective cohort study in Brazil

OBJECTIVE

To compare the outcomes of adolescent versus adult women during pregnancy and puerperium admitted to a dedicated intensive care unit (ICU) in Manaus, Amazonas, Brazil.

METHODS

In a retrospective cohort study, we retrieved data from the medical charts of 557 adolescent (<20 years) and adult (≥20 years) women. The association between demographic and clinical variables and the outcomes were compared in univariate and multivariate analyses.

RESULTS

The maternal severity index (MSI) of adult women was significantly higher than in adolescents. In univariate log-binomial regression analysis, pneumothorax and circulatory dysfunction were positively associated with the composite primary outcome of death or transfer (for more complex care), whereas eclampsia was negatively associated. Being an adolescent was not associated with this outcome, not even when adjusting for potential confounders. Conversely, being an adolescent was associated with fewer complications (secondary outcome) even after adjusting for potential confounders (type of admission, eclampsia, pre-eclampsia, surgical site infection, abdominal hemorrhage, drug abuse, metabolic syndrome, malnutrition, pneumothorax, or circulatory dysfunction).

CONCLUSION

In Manaus, Amazonas, Brazil, adult women admitted to the ICU because of gestational or birth complications had worse outcomes compared with adolescents.

Epidemiology, Outcomes, and Risk Factors for Mortality in Critically Ill Women Admitted to an Obstetric High-Dependency Unit in Sierra Leone

A better understanding of the context-specific epidemiology, outcomes, and risk factors for death of critically ill parturients in resource-poor hospitals is needed to tackle the still alarming in-hospital maternal mortality in African countries. From October 2017 to October 2018, we performed a 1-year retrospective cohort study in a referral maternity hospital in Freetown, Sierra Leone. The primary endpoint was the association between risk factors and high-dependency unit (HDU) mortality. Five hundred twenty-three patients (median age 25 years, interquartile range [IQR]: 21-30 years) were admitted to the HDU for a median of 2 (IQR: 1-3) days. Among them, 65% were referred with a red obstetric early warning score (OEWS) code, representing 1.17 cases per HDU bed per week; 11% of patients died in HDU, mostly in the first 24 hours from admission. The factors independently associated with HDU mortality were ward rather than postoperative referrals (odds ratio [OR]: 3.21; 95% CI: 1.48-7.01; P = 0.003); admissions with red (high impairment of patients' vital signs) versus yellow (impairment of vital signs) or green (little or no impairment of patients' vital signs) OEWS (OR: 3.66; 95% CI: 1.15-16.96; P = 0.04); responsiveness to pain or unresponsiveness on the alert, voice, pain unresponsive scale (OR: 5.25; 95% CI: 2.64-10.94; P ≤ 0.0001); and use of vasopressors (OR: 3.24; 95% CI: 1.32-7.66; P = 0.008). Critically ill parturients were predominantly referred with a red OEWS code and usually required intermediate care for 48 hours. Despite the provided interventions, death in the HDU was frequent, affecting one of 10 critically ill parturients. Medical admission, a red OEWS code, and a poor neurological and hemodynamic status were independently associated with mortality, whereas adequate oxygenation was associated with survival.

Comparison of Sequential Organ Failure Assessment (SOFA) and Sepsis in Obstetrics Score (SOS) in Women with Pregnancy-Associated Sepsis with Respect to Critical Care Admission and Mortality: A Prospective Observational Study

Objective

We aimed to determine performance of sequential organ failure assessment (SOFA) and Sepsis in Obstetrics Score (SOS), in women with pregnancy-associated sepsis (PAS) with respect to critical care admission and mortality.

Methods

Obstetric patients with PAS fulfilling any 2 of the quick SOFA (qSOFA) criteria were enrolled as cases. The various parameters of SOFA and SOS were recorded at admission and compared for outcomes.

Results

Critical care was required in 32 (50.7%) patients and associated mortality was high (31.7%). For our study population, a threshold of SOFA ≥ 6 had the best combination of sensitivity (84.4%) and specificity (61.3%) for critical care admission. For SOS, a cut-off value of ≥ 6 gave best sensitivity (64%) and specificity (40%) for the same.

Conclusions

SOFA was far more predictive of patient's critical condition as well as mortality compared to SOS. SOFA was superior to SOS in determining critical care admission and mortality for PAS.

Extracorporeal membrane oxygenation in pregnant and postpartum women: a ten-year case series

Objective

tExtracorporeal membrane oxygenation (ECMO) is a life-saving therapy for severe, reversible cardiopulmonary failure, but data regarding its use in pregnancy and the postpartum period are limited. We sought to quantify survival of pregnant and postpartum women necessitating ECMO in a contemporary cohort at a single tertiary institution.

Study Design

All women of reproductive age (14–44 years), who underwent ECMO at our institution between January 1, 2008, and December 31, 2017, were identified using a query of hospital encounters for ECMO-related CPT codes. We manually reviewed all charts of women of reproductive age; women who were pregnant or <6 weeks postpartum at the time of ECMO initiation were included. Clinical characteristics and maternal and fetal outcomes are described.

Results

In this study, 54 women of reproductive age underwent ECMO for cardiopulmonary failure. Of those, 9 (17%) were pregnant or <6 weeks postpartum at the time of ECMO initiation: 4 antepartum, 1 intraoperative at the time of cesarean delivery, and 4 postpartum (including 2 in whom ECMO was initiated on postpartum day 0 or 1). Overall, maternal survival was 33%. The median maternal age was 24 years (range 19–39 years); most women were nonsmokers without underlying medical comorbidities. The most common indication for ECMO use in pregnant and postpartum women was acute respiratory distress syndrome, which was present in 7 cases (78%), including 5 cases that were due to infectious etiologies and 2 cases that were attributed to preeclampsia. The median number of days on ECMO was 6 (range 1–14). There were no cases of obstetric hemorrhage. Venovenous ECMO was utilized in all but 1 case, in which emergent attempted venoarterial ECMO was unsuccessful in resuscitating a postpartum patient with cardiac arrest and a massive pulmonary embolism. A total of 4 women were initiated on ECMO during pregnancy: their gestational ages at ECMO initiation were 21, 22, 29, and 30 weeks; maternal survival was 50%, and fetal mortality was 50%. A case of ECMO initiated during cesarean section at 29 weeks’ gestation resulted in both maternal and fetal survival. Among 4 mothers with ECMO initiation after childbirth, none survived. Finally, we found a tendency toward survival in those patients for whom ECMO was initiated soon after mechanical ventilation, earlier in the disease process. In contrast, in this study, 23 of 45 women of reproductive age (51%) who were not pregnant but underwent ECMO survived.

Conclusion

When ECMO was initiated during pregnancy or during childbirth, 60% of mothers and fetuses survived, supporting current use of ECMO as a salvage therapy in pregnant and intrapartum women. In this generally young and healthy population, ECMO has the potential to increase the survival rates of both mother and fetus and should be considered a salvage therapy for peripartum women with reversible forms of cardiorespiratory failure.

Intimate partner violence and severe acute maternal morbidity in the intensive care unit: A case-control study in Peru

BACKGROUND

Intimate partner violence is a prevalent public health issue associated with all-cause maternal mortality. This study investigated the relationship between intimate partner violence, severe acute maternal morbidity in the intensive care unit (ICU), and neonatal outcomes.

METHODS

This was a prospective case-control study in a hospital in Lima, Peru, with 109 cases (maternal ICU admissions) and 109 controls (obstetric patients not admitted to the ICU). Data were collected through face-to-face interviews and medical record review. Partner violence was assessed using the World Health Organization instrument. Multivariate logistic regression was used to model the association between intimate partner violence and severe acute maternal morbidity.

RESULTS

There was a significantly higher rate of intimate partner violence both before and during pregnancy among cases (58.7%) than controls (27.5%). In multivariate analysis, intimate partner violence both before and during pregnancy (aOR 3.83 (95% CI: 1.99-7.37)), being married (3.86 (1.27-11.73)), having <8 antenatal care visits (2.78 (1.14-6.80)), and having previous abortions (miscarriage, therapeutic, or unsafe) (1.69 (1.13-2.51)) were significantly associated with severe acute maternal morbidity. The ICU admission rate was 18.8 (per 1000 live births), and ICU maternal mortality was 1.7%. The perinatal mortality rate was higher in cases (9.3%) than in controls (1.8%).

CONCLUSIONS

Intimate partner violence was associated with an increased risk of severe acute maternal morbidity. This suggests a more severe impact of intimate partner violence on pregnancy than has been previously identified. Inquiring about intimate partner violence during prenatal visits may prevent further harm to the mother-baby dyad.

ACOG Practice Bulletin No. 211: Critical Care in Pregnancy

Critical care in pregnancy relies predominantly on recommendations from nonpregnant adult critical care with only limited research available for obstetric critical care specifically. The purpose of this document is to review available evidence, propose strategies for obstetric-related critical care, and highlight the need for additional research. Much of the review will, of necessity, focus on general principles of critical care, extrapolating when possible to critical care in pregnancy and the puerperium. This Practice Bulletin is updated to include information about unique issues to pregnancy when conditions such as sepsis or acute respiratory distress syndrome (ARDS) are encountered and the obstetrician's role in the management of the critically ill pregnant woman, which is dependent upon the care setting and the intensive care unit (ICU) model used. The role of the tele-intensive care unit in the care of critically ill pregnant women also is explored.

Obstetric Early Warning Score for Prognostication of Critically Ill Obstetric Patient

Introduction

Obstetric early warning score (OEWS) has been used conventionally for early identification of deteriorating obstetric patients in the labor room and ward settings. This study was conducted to determine if this simple clinical score could be used for prognosticating a critically ill patient in the ICU setting instead of sequential organ failure assessment score (SOFA) and acute physiology and chronic health evaluation (APACHE II) score.

Materials and Methods

A cohort study was conducted at Obstetrics Critical Care Unit, Vardhman Mahavir Medical College and Safdarjung Hospital, New Delhi. A total of 250 obstetric patients were recruited after informed consent. The OEWS, SOFA, and APACHE II scores were calculated within 24 hours of admission. The patients were followed to study the maternal outcome.

Results

The area under receiver operator characteristic (AUROC) curve of OEWS, SOFA, and APACHE II for prediction of maternal mortality was 0.894 (95% CI, 0.849–0.929), 0.924 (95% CI, 0.884–0.954), and 0.93 (95% CI, 0.891–0.958), respectively. The standardized mortality ratio (SMR) for OEWS, SOFA, and APACHE II was 66.3, 62.5, and 69.15%, respectively.

Conclusion

Obstetric early warning score is as effective as the conventional SOFA and APACHE II to prognosticate the obstetric patient. Since OEWS is based only on clinical criteria, it can be done immediately on admission and can help in early allocation of appropriate manpower and resources for optimum outcome.

Clinical significance

The clinical application of this study will help intensivists to prognosticate the critically ill obstetric patients immediately following admission to the critical care unit.

How to cite this article

Khergade M, Suri J, Bharti R, Pandey D, Bachani S, Mittal P. Obstetric Early Warning Score for Prognostication of Critically Ill Obstetric Patient. Indian J Crit Care Med 2020;24(6):398–403.

Characteristics of obstetric admissions to intensive care unit: APACHE II, SOFA and the Glasgow Coma Scale

Objective To evaluate the characteristics of obstetric admissions to an intensive care unit (ICU) and assess the utility of Acute Physiology and Chronic Health Evaluation II (APACHE II), Sequential Organ Failure Assessment (SOFA) and the Glasgow Coma Scale (GCS). Methods This study is consisted of 160 patients admitted to an ICU during the antenatal period or within 7 days at the postpartum period. Clinical characteristics and ICU scores were evaluated. Results The rate of admission to the ICU was 7.8/1000 deliveries. Four cases ended with maternal mortality (2.5%). The most common hospitalization indications were hypertensive disorders of pregnancy, cardiovascular disorders and obstetric hemorrhage, at 40 (25%), 34 (21.2%), and 31 (19.3%) cases, respectively. The receiver operating characteristics (ROC) curve analysis for prediction of maternal mortality revealed area under curve (AUC) values as 0.971 both for APACHE II and predicted mortality rate (PMR), and 24.5 and 47.1 were determined as the cut-offs with sensitivities of 100%. AUCs were also 0.901 and 0.929 for the initial and worst SOFA score, respectively. The cut-off value for the initial and worst SOFA score was 3.5, with a sensitivity of 100%, and was 10 with a specificity of 98.9%, respectively. Conclusion APACHE II and PMR overpredict maternal mortality, but those higher scores predict maternal mortality. Higher SOFA scores are related with maternal mortalities with high specificity.

Prediction of Severe Maternal Outcome Among Pregnant and Puerperal Women in Obstetric ICU

OBJECTIVE

World Health Organization recommends the use of maternal near miss as a tool to monitor and improve quality of obstetric care. Severe maternal outcome corresponds to the sum of maternal near miss and maternal death cases. This study was aimed at validating Acute Physiology and Chronic Health Evaluation II and IV, Simplified Acute Physiology Score III, and Sequential Organ Failure Assessment in pregnant and postpartum women in predicting severe maternal outcome.

DESIGN

A retrospective cohort study.

SETTING

Obstetric ICU in a tertiary care hospital in Brazil.

PATIENTS

Pregnant and postpartum women admitted to the obstetric ICU during a 3-year period.

INTERVENTIONS

None.

MEASUREMENTS AND MAIN RESULTS

A total of 279 women were admitted to ICU, an admission rate of 34.6/1,000 live births, and the mortality index to severe maternal outcome (maternal death/maternal near miss + maternal death) was 7.7%. Total Sequential Organ Failure Assessment had a better overall performance than remaining scores for total hospitalizations (area under the curve, 0.86; standardized mortality ratio, 0.96; 95% CI, 0.74-1.22), for hypertensive direct causes (area under the curve, 0.81; standardized mortality ratio, 0.73; 95% CI, 0.31-1.43), and indirect causes (area under the curve, 0.89; standardized mortality ratio, 0.85; 95% CI, 0.59-1.19). The Acute Physiology and Chronic Health Evaluation II had a better overall performance than total Sequential Organ Failure Assessment for hemorrhagic causes (area under the curve, 0.75; standardized mortality ratio, 1.0; 95% CI, 0.61-1.54).

CONCLUSIONS

Total Sequential Organ Failure Assessment may be used to predict severe maternal outcome in obstetric populations admitted to ICU. The Acute Physiology and Chronic Health Evaluation II may be applied to predict severe maternal outcome in hemorrhagic complications. We do not recommend Acute Physiology and Chronic Health Evaluation IV and Simplified Acute Physiology Score III for the prediction of severe maternal outcome.

Maternal and neonatal characteristics in obstetric intensive care unit admissions

BACKGROUND

The objective of this study was to evaluate the course of pregnancy and delivery of obstetric patients admitted for intensive care, and determine the health status of their infants.

METHODS

This was a retrospective register-based study. Four university hospitals in Finland participated. Obstetric patients admitted to the intensive care unit in any trimester of pregnancy, during delivery or up to 42 days post partum were identified from clinical information systems over a five-year study period. Parturient and infant data were collected from the Medical Birth Register.

RESULTS

During the study period (2007-2011), 283 obstetric patients were identified from the clinical information system. The most common reason for admission was hypertensive complications (58%), followed by obstetric haemorrhage (25.1%). Advanced maternal age, nulliparity and multiple pregnancies were associated with obstetric intensive care unit admissions. Of patients admitted to intensive care, 68.9% delivered by unscheduled caesarean section. Nearly 60% of neonates were born preterm, 56.1% needed treatment in a neonatal intensive care unit or an observation unit and 4.6% died within one week.

CONCLUSION

Advanced maternal age, nulliparity and multiple pregnancy were more common among intensive care unit-admitted women than in the general obstetric population. The main causes for admission were hypertensive complications and obstetric haemorrhage. Compared with the general obstetric population, neonates of intensive care unit-admitted mothers were eight times more likely to require treatment on a neonatal ward and their risk of neonatal death was also eight times greater.

Critically Ill Obstetric Admissions to an Intensive Care Unit: A Prospective Analysis from a Tertiary Care University Hospital in South India

Background

Critically ill obstetric patients represent a small proportion of intensive care unit (ICU) admissions. Physiological changes of pregnancy along with pregnancy specific diseases may lead to rapid deterioration of the health status of the parturient warranting ICU care. The present study aims to study the clinical profile and outcomes of the obstetric patients requiring ICU care.

Study design and settings

Prospective observational study in the multidisciplinary ICU of a tertiary care teaching hospital conducted for a period of 2 years.

Materials and methods

Demographic details, indication for ICU admission, severity of illness scores, interventions, complications and outcomes of the consecutive obstetric patients transferred to ICU were studied.

Results

Ninety-one patients were admitted (26 per 1000 deliveries) to the ICU. Majority of them were postpartum (84.6%) and unbooked or referred (63.8%). Hypertensive disorders (24.2%) and obstetric hemorrhage (23.1%) were the major cause for admission to ICU. Forty three patients (47.3%) underwent cesarean delivery. Mechanical ventilation (54.9%), blood transfusion (46%), vasopressor therapy (22%) and dialysis (9.9%) were the various interventions provided in the ICU. Patients with sepsis had high mortality accounting for one third of ICU mortality. The ICU mortality rate was 9.9%.

Conclusion

The present study showed a clinical profile and outcomes similar to the current scenario of critically ill obstetric patients nationwide. Further studies with a larger sample size may provide a better insight in this population.

How to cite this article

Sailaja B, Renuka MK, et al. Critically Ill Obstetric Admissions to an Intensive Care Unit: A Prospective Analysis from a Tertiary Care University Hospital in South India. Indian J of Crit Care Med 2019;23(2):78-82.

Epidemiology, lung mechanics and outcomes of ARDS: A comparison between pregnant and non-pregnant subjects

PURPOSE

We describe the epidemiology, lung mechanics and outcomes of acute respiratory distress syndrome (ARDS) complicating pregnancy. We also compare the outcomes of ARDS in pregnant and non-pregnant females.

METHODS

Retrospective observational study of all women admitted with ARDS.

RESULTS

211 women with ARDS were admitted, which included 27 (12.8%) pregnant subjects. All were ventilated with a low tidal volume strategy. Most pregnant females presented during the third trimester. There was no difference in the lung compliance, the applied PEEP and the plateau pressures across trimesters. The pregnant females had a lower median age (25 [22-28] vs. 32 [22-42] years, p = 0.003), higher proportion of severe ARDS (40.8% vs. 10.3%, p < 0.0001), and higher driving pressure (18.2 vs. 15.5 cm H₂O, p = 0.03) compared to non-pregnant females. The maternal (18.5%) and perinatal (37%) mortality was high. However, the mortality was not different between pregnant and non-pregnant subjects with ARDS. On a multivariate logistic regression analysis, the baseline APACHE II score, driving pressure and the delta SOFA score were independent predictors of mortality.

CONCLUSIONS

ARDS complicating pregnancy is severe and is associated with high perinatal mortality. However, the outcomes of ARDS in pregnant females were similar to non-pregnant females.

Risk prediction models for maternal mortality: A systematic review and meta-analysis

PURPOSE

Pregnancy-related critical illness leads to death for 3-14% of affected women. Although identifying patients at risk could facilitate preventive strategies, guide therapy, and help in clinical research, no prior systematic review of this literature exploring the validity of risk prediction models for maternal mortality exists. Therefore, we have systematically reviewed and meta-analyzed risk prediction models for maternal mortality.

METHODS

Search strategy: MEDLINE, EMBASE and Scopus, from inception to May 2017. Selection criteria: Trials or observational studies evaluating risk prediction models for maternal mortality. Data collection and analysis: Two reviewers independently assessed studies for eligibility and methodological quality, and extracted data on prediction performance.

RESULTS

Thirty-eight studies that evaluated 12 different mortality prediction models were included. Mortality varied across the studies, with an average rate 10.4%, ranging from 0 to 41.7%. The Collaborative Integrated Pregnancy High-dependency Estimate of Risk (CIPHER) model and the Maternal Severity Index had the best performance, were developed and validated from studies of obstetric population with a low risk of bias. The CIPHER applies to critically ill obstetric patients (discrimination: area under the receiver operating characteristic curve (AUC) 0.823 (0.811-0.835), calibration: graphic plot [intercept-0.09, slope 0.92]). The Maternal Severity Index applies to hospitalized obstetric patients (discrimination: AUC 0.826 [0.802-0.851], calibration: standardized mortality ratio 1.02 [0.86-1.20]).

CONCLUSIONS

Despite the high heterogeneity of the study populations and the limited number of studies validating the finally eligible prediction models, the CIPHER and the Maternal Severity Index are recommended for use among critically ill and hospitalized pregnant and postpartum women for risk adjustment in clinical research and quality improvement studies. Neither index has sufficient discrimination to be applicable for clinical decision making at the individual patient level.

Exploring Epidemiological Aspects, Distribution of WHO Maternal Near Miss Criteria, and Organ Dysfunction Defined by SOFA in Cases of Severe Maternal Outcome Admitted to Obstetric ICU: A Cross-Sectional Study

Objective

To explore the epidemiological aspects, to describe the frequency and distribution of WHO maternal near miss (MNM) criteria and the presence of organ dysfunction and failure measured by the maximum SOFA (Sequential Organ Failure Assessment) score (SOFA max) in cases of severe maternal outcome (SMO).

Methods

In an observational cross-sectional study performed between January 2013 and December 2015, 279 pregnant or postpartum women were admitted to an obstetric ICU (intensive care unit) in Brazil. MNM, maternal death (grouped as SMO), and potentially life-threatening conditions (PLTC) were defined according to WHO criteria. For categorical variables, a descriptive analysis was carried out. Frequency and distribution of WHO criteria, organ dysfunction, or failure defined by SOFA max were performed.

Results

WHO criteria identified 65 SMO and 214 PLTC. Management criteria were present in 58/65 (89.2%) while 61/65 (93.8%) of SMO cases had dysfunction or failure by SOFA.

Conclusions

The systematic evaluation of the organic function by SOFA max score identified the presence of organic dysfunction or failure in almost all SMO cases. Management criteria were present in all MD cases. Our results indicate the need for new studies evaluating the parameterization of the WHO laboratory criteria for values compatible with the definition of organic dysfunction by the SOFA to identify MNM.

Framework for Critical Care in Obstetrics

In 2015, The American College of Obstetricians and Gynecologists and the Society for Maternal Fetal Medicine issued a joint care consensus document intended to develop standards for designations of levels of maternal care that are complimentary to, but distinct from, neonatal levels of care. Level III and Level IV centers must be prepared to provide obstetric intensive care services. Developing a critical care obstetric program is a resource-intensive process that requires a carefully planned strategic effort essential for successful program implementation and sustainability. In this article, a framework utilizing key components of program development is discussed including environment, scope, model, education and training, maternal transport, and unique aspects of care for women who become critically ill during pregnancy or the postpartum period.

Evaluation of Admission Indications, Clinical Characteristics and Outcomes of Obstetric Patients Admitted to the Intensive Care Unit of a Teaching Hospital Center: A Five-Year Retrospective Review

Background

Care of obstetric patients has always been a challenge for critical care physicians, because in addition to their complex pregnancy-related disease, fetal viability is considered.

Objectives

The aim of this study was to review the admission indications, clinical characteristics and outcomes of obstetric patients, admitted to the intensive care unit of Alzzahra teaching hospital affiliated to Guilan University of Medical Sciences, Rasht, Iran.

Methods

This retrospective cohort study was conducted on pregnant /post-partum (up to 6 weeks) patients admitted to the ICU over a 5-year period from April 2009 to April, 2014.

Results

Data from 1019 subjects were analyzed. Overall, 90.1% of the patients were admitted in the postpartum period. The most common indications for admission were pregnancy related hypertensive disorders (27.5%) and obstetric hemorrhage (13.5%). Epilepsy (5.4%) and cardiac disease (5.2%) were the most common non-obstetric indications.

Conclusions

Pregnancy-related hypertensive disorders and obstetric hemorrhage were the main reasons for admission, and epilepsy and cardiac disease were the most common non-obstetric indications. Efforts must be concentrated on increasing antenatal care.

Registered nurses' experiences of caring for pregnant and postpartum women in general hospital settings: a systematic review and meta-synthesis of qualitative data

AIMS AND OBJECTIVES

To understand how nurses view and experience caring for pregnant and postpartum women in nonmaternity care settings.

BACKGROUND

A degree of apprehension is perceived to exist among nurses in relation to caring for pregnant or postpartum women in nonmaternity care settings. The nature of nonmidwife nurses' concerns about caring for this group of women in these contexts, however, is not known.

DESIGN

A six-step systematic approach was employed for this review.

METHODS

In Step 1, the research question was developed; Step 2 involved developing the inclusion criteria for articles; the literature search strategy was devised in Step 3; Step 4 comprised the conduct of the literature search and selection of articles for review; in Step 5, the critical appraisal of selected studies and synthesis of data was undertaken; interpretation of the findings occurred in Step 6.

RESULTS

Following a process of elimination, the final number of articles retained for this review was three. Fifty-four Level 1 findings were extracted from these three articles which were subsequently collapsed into four Level 2 categories. Two Level 3 synthesised findings that characterise what is known about the topic of interest were then derived from these four Level two categories.

CONCLUSIONS

Nurses are reportedly ill prepared for the experience of caring for pregnant and postpartum women in general care settings. A combination of a lack of education and a need to 'learn on the job' reportedly evokes stress, trauma and a sense of professional inadequacy.

RELEVANCE TO CLINICAL PRACTICE

This review identifies lack of knowledge and of adequate supervision for nurses in this context, which in turn poses a clinical risk to pregnant and postpartum women in their care. Effective strategies to establish initial and ongoing collaborative education and clinical practice guidelines are required.

The Usefulness of the APACHE II Score in Obstetric Critical Care: A Structured Review

OBJECTIVE

To assess the performance of the Acute Physiology and Chronic Health Evaluation II (APACHE II) mortality prediction model in pregnant and recently pregnant women receiving critical care in low-, middle-, and high-income countries during the study period (1985-2015), using a structured literature review.

DATA SOURCES

Ovid MEDLINE, Embase, Web of Science, and Evidence-Based Medicine Reviews, searched for articles published between 1985 and 2015.

STUDY SELECTION

Twenty-five studies (24 publications), of which two were prospective, were included in the analyses. Ten studies were from high-income countries (HICs), and 15 were from low- and middle-income countries (LMICs). Median study duration and size were six years and 124 women, respectively.

DATA SYNTHESIS

ICU admission complicates 0.48% of deliveries, and pregnant and recently pregnant women account for 1.49% of ICU admissions. One quarter were admitted while pregnant, three quarters of these for an obstetric indication and for a median of three days. The median APACHE II score was 10.9, with a median APACHE II-predicted mortality of 16.6%. Observed mortality was 4.6%, and the median standardized mortality ratio was 0.36 (interquartile range 0.23 to 0.73). The standardized mortality ratio was < 0.9 in 24 of 25 studies. Women in HICs were more frequently admitted with a medical comorbidity but were less likely to die than were women in LMICs.

CONCLUSION

The APACHE II score consistently overestimates mortality risks for pregnant and recently pregnant women receiving critical care, whether they reside in HICs or LMICs. There is a need for a pregnancy-specific outcome prediction model for these women.