Society for Maternal-Fetal Medicine Consult Series #54: Assessing the risk of maternal morbidity and mortality

Relationship between nurse staffing during labor and cesarean birth rates in U.S. hospitals

BACKGROUND

Cesarean birth increases risk of maternal morbidity and mortality.

PURPOSE

Examine the relationship between labor and delivery staffing and hospital cesarean and vaginal birth after cesarean (VBAC) rates.

METHODS

Survey of U.S. labor nurses in 2018 and 2019 on adherence to AWHONN nurse staffing standards with data linked to American Hospital Association Survey data, patient discharge data, and cesarean birth and VBAC rates.

FINDINGS

In total, 2,786 nurses from 193 hospitals in 23 states were included. Mean cesarean rate was 27.3% (SD 5.9, range 11.7%-47.2%); median VBAC rate 11.1% (IQR 1.78%-20.2%; range 0%-40.1%). There was relatively high adherence to staffing standards (mean, 3.12 of possible 1-4 score). After adjusting for hospital characteristics, nurse staffing was an independent predictor of hospital-level cesarean and VBAC rates (IRR 0.89, 95% CI 0.84-0.95 and IRR 1.58, 95% CI 1.25-1.99, respectively).

DISCUSSION

Better nurse staffing predicted lower cesarean birth rates and higher VBAC rates.

CONCLUSION

Hospitals should be accountable for providing adequate nurse staffing during childbirth.

External validation and comparison of four prediction scores for severe maternal morbidity

BACKGROUND

Severe maternal morbidity (SMM) is increasing in the United States. Several tools and scores exist to stratify an individual's risk of SMM.

OBJECTIVE

We sought to examine and compare the validity of four scoring systems for predicting SMM.

STUDY DESIGN

This was a retrospective cohort study of all individuals in the Consortium on Safe Labor dataset, which was conducted from 2002 to 2008. Individuals were excluded if they had missing information on risk factors. SMM was defined based on the Centers for Disease Control and Prevention excluding blood transfusion. Blood transfusion was excluded due to concerns regarding the specificity of International Classification of Diseases codes for this indicator and its variable clinical significance. Risk scores were calculated for each participant using the Assessment of Perinatal Excellence (APEX), California Maternal Quality Care Collaborative (CMQCC), Obstetric Comorbidity Index (OB-CMI), and modified OB-CMI. We calculated the probability of SMM according to the risk scores. The discriminative performance of the prediction score was examined by the areas under receiver operating characteristic curves and their 95% confidence intervals (95% CI). The area under the curve for each score was compared using the bootstrap resampling. Calibration plots were developed for each score to examine the goodness-of-fit. The concordance probability method was used to define an optimal cutoff point for the best-performing score.

RESULTS

Of 153, 463 individuals, 1115 (0.7%) had SMM. The CMQCC scoring system had a significantly higher area under the curve (95% CI) (0.78 [0.77-0.80]) compared to the APEX scoring system, OB-CMI, and modified OB-CMI scoring systems (0.75 [0.73-0.76], 0.67 [0.65-0.68], 0.66 [0.70-0.73]; P<.001). Calibration plots showed excellent concordance between the predicted and actual SMM for the APEX scoring system and OB-CMI (both Hosmer-Lemeshow test P values=1.00, suggesting goodness-of-fit).

CONCLUSION

This study validated four risk-scoring systems to predict SMM. Both CMQCC and APEX scoring systems had good discrimination to predict SMM. The APEX score and the OB-CMI had goodness-of-fit. At ideal calculated cut-off points, the APEX score had the highest sensitivity of the four scores at 71%, indicating that better scoring systems are still needed for predicting SMM.

Society for Maternal-Fetal Medicine Consult Series #71: Management of previable and periviable preterm prelabor rupture of membranes

Previable and periviable preterm prelabor rupture of membranes are challenging obstetrical complications to manage given the substantial risk of maternal morbidity and mortality, with no guarantee of fetal benefit. The following are the Society for Maternal-Fetal Medicine recommendations for the management of previable and periviable preterm prelabor rupture of membranes before the period when a trial of neonatal resuscitation and intensive care would be considered appropriate by the healthcare team and desired by the patient: (1) we recommend that pregnant patients with previable and periviable preterm prelabor rupture of membranes receive individualized counseling about the maternal and fetal risks and benefits of both abortion care and expectant management to guide an informed decision; all patients with previable and periviable preterm prelabor rupture of membranes should be offered abortion care, and expectant management can also be offered in the absence of contraindications (GRADE 1C); (2) we recommend antibiotics for pregnant individuals who choose expectant management after preterm prelabor rupture of membranes at ≥24 0/7 weeks of gestation (GRADE 1B); (3) antibiotics can be considered after preterm prelabor rupture of membranes at 20 0/7 to 23 6/7 weeks of gestation (GRADE 2C); (4) administration of antenatal corticosteroids and magnesium sulfate is not recommended until the time when a trial of neonatal resuscitation and intensive care would be considered appropriate by the healthcare team and desired by the patient (GRADE 1B); (5) serial amnioinfusions and amniopatch are considered investigational and should be used only in a clinical trial setting; they are not recommended for routine care of previable and periviable preterm prelabor rupture of membranes (GRADE 1B); (6) cerclage management after previable or periviable preterm prelabor rupture of membranes is similar to cerclage management after preterm prelabor rupture of membranes at later gestational ages; it is reasonable to either remove the cerclage or leave it in situ after discussing the risks and benefits and incorporating shared decision-making (GRADE 2C); and (7) in subsequent pregnancies after a history of previable or periviable preterm prelabor rupture of membranes, we recommend following guidelines for management of pregnant persons with a previous spontaneous preterm birth (GRADE 1C).

The global burden, risk and inequality of maternal obstructed labor and uterine rupture from 1990 to 2019

BACKGROUND

Obstructed labor (OL) and uterine rupture (UR) are common obstetric complications. This study explored the burden, risk factors, decomposition, and health inequalities associated with OL and UR to improve global maternal health.

METHODS

This was a cross-sectional analysis study including data on OL and UR from the Global Burden of Diseases, and Risk Factors Study (GBD) 2019. The main outcome measures included the number and age-standardized rate (ASR) of incidence, disability-adjusted life years (DALYs), prevalence, and deaths.

RESULTS

The global burden of OL and UR has declined, with a decrease in incidence (number in 2019: 9,410,500.87, 95%UI 11,730,030.94 to 7,564,568.91; ASR in 2019: 119.64 per 100,000, 95%UI 149.15 to 96.21; estimated annual percentage change [EAPC] from 1990 to 2019: -1.34, 95% CI -1.41 to -1.27) and prevalence over time. However, DALYs (number in 2019: 999,540.67, 95%UI 1,209,749.35 to 817,352.49; ASR in 2019: 12.92, 95%UI 15.63 to 10.56; EAPC from 1990 to 2019: -0.91, 95% CI -1.26 to -0.57) and deaths remain significant. ASR of DALYs increased for the 10-14 year-old age group (2.01, 95% CI 1.53 to 2.5), the 15-19 year-old age group (0.07, 95% CI -0.47 to 0.61), Andean Latin America (3.47, 95% CI 3.05 to 3.89), and Caribbean (4.16, 95% CI 6 to 4.76). Iron deficiency was identified as a risk factor for OL and UR, and its impact varied across different socio-demographic indices (SDIs). Decomposition analysis showed that population growth primarily contributed to the burden, especially in low SDI regions. Health inequalities were evident, the slope and intercept for DALYs were - 47.95 (95% CI -52.87 to -43.02) and - 29.29 (95% CI -32.95 to -25.63) in 1990, 39.37 (95%CI 36.29 to 42.45) and 24.87 (95%CI 22.56 to 27.18) in 2019. Concentration indices of ASR-DALYs were - 0.2908 in 1990 and - 0.2922 in 2019.

CONCLUSION

This study highlights the significant burden of OL and UR and emphasizes the need for continuous efforts to reduce maternal mortality and morbidity. Understanding risk factors and addressing health inequalities are crucial for the development of effective interventions and policies to improve maternal health outcomes globally.

Impact of post-Dobbs abortion restrictions on maternal-fetal medicine physicians in the Southeast: a qualitative study

BACKGROUND

The United States Supreme Court overturned federal abortion protections in Dobbs v Jackson Women's Health Organization. Many states in the Southeastern United States responded with restrictive policies that limit and criminalize abortion care.

OBJECTIVE

This study aimed to characterize the effect of abortion restrictions on maternal-fetal medicine physicians in the Southeastern United States after the Dobbs decision.

STUDY DESIGN

Qualitative, semistructured interviews with 35 maternal-fetal medicine physicians in 10 Southeastern states between February 2023 and June 2023 were conducted. Our recruitment strategy relied on convenience and snowball sampling. Audio-recorded interviews were analyzed using Dedoose software and a descriptive qualitative approach that incorporated deductive and inductive approaches.

RESULTS

Emergent themes were identified, and a conceptual framework was developed on the basis of overarching themes. This study found that abortion laws and external constraints after the Dobbs decision resulted in ethical, professional, and legal challenges for maternal-fetal medicine physicians that led to changes in clinical practice and deviations from patient-centered care. These forced changes resulted in negative effects on maternal-fetal medicine physicians, such as increased fear, hypervigilance, and increased workload. In addition, these changes prompted concerns about health risks and negative emotional effects for patients. Supportive colleagues, hospital systems, and policies were associated with decreased stress, emotional distress, and disruption of healthcare delivery.

CONCLUSION

Abortion restrictions in the Southeastern United States limit the ability of maternal-fetal medicine physicians to provide or facilitate abortions in the setting of fetal anomalies and maternal health risks. Maternal-fetal medicine physicians perceived these restrictions to have negative professional and emotional repercussions for themselves and negative effects on patients. Supportive colleagues and clear guidance from hospital systems and departments on how to interpret the laws were protective. Our findings have implications for the maternal-fetal medicine workforce and patient care in the region.

The Association between Grand Multiparity and Adverse Neonatal Outcomes: A Retrospective Cohort Study from Ha'il, Saudi Arabia

Inconsistent evidence exists regarding the association of grand multiparity with adverse neonatal outcomes. This study aims to compare specific adverse outcomes in grand multiparas (those with five or more births at twenty or more weeks of gestation, regardless of fetal outcome) compared to those with lower parity (those with less than five births at twenty or more weeks of gestation, regardless of fetal outcome). A retrospective cohort study was undertaken at the Maternity and Children Hospital in Ha'il region, Saudi Arabia. After calculating the required sample size, data were collected from consenting participants with a viable singleton delivery. Socio-demographic variables, select maternal characteristics, and adverse neonatal outcomes (admission to the neonatal intensive care unit, low birth weight, prematurity, and APGAR score less than 7 in the first 5 min) were compared between grand multiparas and women with lower parity. Two hundred ninety-four participants were recruited (ninety-eight grand multiparas and one hundred ninety-six of lower parity). There was a statistically significant difference between the two groups in relation to age, level of education, body mass index, and the occurrence of gestational diabetes. Out of the studied adverse neonatal outcomes after the adjustment for maternal age between the two groups, no statistically significant difference in the adverse neonatal outcomes was found between the two groups. Grand multiparity does not incur an additional risk of adverse neonatal outcomes compared to women of lower parity. Furthermore, increasing maternal age and comorbid conditions might have a more detrimental effect on neonatal outcomes than grand multiparity per se.

Vaginal cleansing before unscheduled cesarean delivery to reduce infection: a randomized clinical trial

BACKGROUND

Cesarean delivery is the most performed major surgery among women, and surgical-site infections following a cesarean delivery are a significant source of postoperative morbidity. It is unclear if vaginal cleansing before a cesarean delivery decreases post-cesarean delivery infectious morbidity.

OBJECTIVE

This study aimed to evaluate if preoperative vaginal cleansing with povidone-iodine among women undergoing a cesarean delivery after labor decreases postoperative infectious morbidity.

STUDY DESIGN

This randomized clinical trial was conducted from August 3, 2015 to January 28, 2021, with 30 days of follow-up and the final follow-up completed on February 27, 2021. Patients met the inclusion criteria if they underwent a cesarean delivery after regular contractions with cervical dilation, rupture of membranes, or any cesarean delivery performed at >4 cm dilation. Participants were randomly assigned in a 1:1 ratio to either abdominal cleansing plus vaginal cleansing with 1% povidone-iodine or abdominal cleansing alone. The primary outcome was composite infectious morbidity including surgical-site infection, fever, endometritis, and wound complications within 30 days after the cesarean delivery. Secondary outcomes included individual components of the composite, length of hospital stay, postoperative hospitalization or outpatient treatment related to infectious morbidity, and empirical treatment for neonatal sepsis.

RESULTS

A total of 608 subjects (304 vaginal cleansing group, 304 control group) were included in the intention-to-treat analysis. Patient characteristics were similar between groups. There was no significant difference in the primary composite outcome between the 2 groups (11.8% vs 11.5%; P=.90; relative risk, 1.0; 95% confidence interval, 0.7-1.6). Individual components of the composite and secondary outcomes were also not significantly different between the groups. Similar findings were observed in the as-treated analysis (11.3% vs 11.8%; P=.9; relative risk, 1.0; 95% confidence interval, 0.7-1.6).

CONCLUSION

Vaginal cleansing with povidone-iodine before an unscheduled cesarean delivery occurring after labor did not reduce the postoperative infectious morbidity. These findings do not support the routine use of vaginal cleansing for women undergoing a cesarean delivery after labor.

Hospital characteristics associated with nurse staffing during labor and birth: Inequities for the most vulnerable maternity patients

BACKGROUND

Evidence is limited on nurse staffing in maternity units.

PURPOSE

To estimate the relationship between hospital characteristics and adherence with Association of Women's Health, Obstetric and Neonatal Nurses nurse staffing guidelines.

METHODS

We enrolled 3,471 registered nurses in a cross-sectional survey and obtained hospital characteristics from the 2018 American Hospital Association Annual Survey. We used mixed-effects linear regression models to estimate associations between hospital characteristics and staffing guideline adherence.

FINDINGS

Overall, nurses reported strong adherence to AWHONN staffing guidelines (rated frequently or always met by ≥80% of respondents) in their hospitals. Higher birth volume, having a neonatal intensive care unit, teaching status, and higher percentage of births paid by Medicaid were all associated with lower mean guideline adherence scores.

DISCUSSION AND CONCLUSIONS

Important gaps in staffing were reported more frequently at hospitals serving patients more likely to have medical or obstetric complications, leaving the most vulnerable patients at risk.

Maternal early warning criteria predict postpartum severe maternal morbidity and mortality after delivery hospitalization discharge: a case-control study

BACKGROUND

The predictors of postpartum severe maternal morbidity and mortality have not been well-described using patient-level data.

OBJECTIVE

This study aimed to evaluate the application of maternal early warning criteria in the postpartum period and generate a preliminary predictive model for severe maternal morbidity and mortality occurring after delivery hospitalization discharge until 42 days postpartum.

STUDY DESIGN

A retrospective case-control study was conducted from January 2013 to September 2020. Cases were identified from electronic medical records using the International Classification of Diseases, Tenth Revision codes for Centers for Disease Control and Prevention-defined severe maternal morbidity. Patients meeting the criteria for severe maternal morbidity and mortality from delivery hospitalization discharge until 42 days postpartum were matched for delivery hospital and year with the controls in an approximate 1:2 fashion. The objective was to identify the demographic and clinical risk factors during the antepartum through postpartum periods for postpartum severe maternal morbidity and mortality. Multivariable logistic regression was performed to estimate the risks, and a receiver operating characteristic curve was derived to evaluate the model.

RESULTS

Ninety cases of postpartum severe maternal morbidity and mortality that occurred following delivery hospitalization discharge were identified. These were matched with 175 controls. Women with postpartum severe maternal morbidity and mortality had more postpartum assessments (mean: 1.7 vs 1.4, P=.005) and a higher frequency of maternal early warning criteria (58% [52/90] vs 2% [3/175]; P<.001) preceding the diagnosis of severe maternal morbidity and mortality than controls. Black women had higher odds of postpartum severe maternal morbidity and mortality than White women (odds ratio, 1.93; 95% confidence interval, 1.14-3.27). Women with maternal early warning criteria during postpartum assessments were more likely to experience subsequent postpartum severe maternal morbidity and mortality (odds ratio, 67.2; 95% confidence interval, 21.3-211.6) than women with no maternal early warning criteria. Although the point estimate was different in Black women (odds ratio, 161.8; 95% confidence interval, 8.9 to >999) than White women (odds ratio, 47.9; 95% confidence interval, 13.8-167.1), the effect modification between the maternal early warning criteria and race was not statistically significant (P=.93). In a multivariable model, race, body mass index, cesarean delivery, and maternal early warning criteria at postpartum assessments were associated with subsequent severe maternal morbidity and mortality, with an area under the curve of 0.905 (95% confidence interval, 0.864-0.946).

CONCLUSION

Maternal early warning criteria are associated with increased odds of postpartum severe maternal morbidity and mortality. A straightforward model that includes race, body mass index, cesarean delivery, and presence of maternal early warning criteria appears to be a promising tool to identify those at risk for postpartum severe maternal morbidity and mortality following delivery hospitalization discharge. This is an important first step in improving the ability to recognize and respond to conditions preceding postpartum severe maternal morbidity. These findings should be validated in a prospective cohort.

Society for Maternal-Fetal Medicine Special Statement: Postpartum visit checklists for normal pregnancy and complicated pregnancy

Rising maternal morbidity and mortality rates, widening healthcare disparities, and increasing focus on cardiometabolic risk modification in at-risk patients have together catalyzed a shift in the postpartum care paradigm. What was once a single office visit in the 6 weeks after delivery is now being reimagined as a continuum of care that transitions patients from pregnancy to life-long health optimization. However, this shift in postpartum care also comes with increased visit complexity and additional provider burden, particularly when patients have had significant pregnancy complications or have chronic diseases. To ensure that the comprehensive needs of both healthy and medically complex people are consistently met under this revised postpartum care paradigm, a postpartum visit checklist for uncomplicated postpartum patients and another checklist for those with major medical or obstetric morbidities are presented. These checklists are designed to ensure that essential elements of physical and mental well-being are routinely considered, that adequate follow-up or specialty referrals are made, and that relevant future health risks are appropriately reviewed and discussed.

Acuity-Based Staffing in Labor and Delivery Using Electronic Health Record Data

ABSTRACT

Background: Planning safe and effective nurse staffing can be challenging for nurse leaders of labor and delivery units due to the dynamic nature of birth and unpredictable fluctuations in census and acuity. The electronic health record (EHR) has a vast source of patient data that can be used to retrospectively review patient needs and nurse staffing gaps that can serve as a basis for prospective planning for nurse staffing.Purpose: This quality improvement project was initiated with the goal of developing real-time and longitudinal reports to quantify hourly nurse staffing needs based on patient census, acuity, and required clinical interventions from data that are contained with the EHR. The plan was to determine trends and nurse staffing needs for each 24-hour period every day of the week and identify ongoing staffing patterns to meet the Association of Women's Health, Obstetric, and Neonatal Nurses' (AWHONN) staffing guidelines.Methods: The obstetric nursing leadership team worked with the information technology specialists and developed an algorithm that identifies patient acuity level, indicated clinical interventions, and outlines necessary staffing requirements to provide safe high-quality care. Various reports were built in the EHR to inform the nursing leadership team about nurse staffing on a real-time and historical basis.Results: The reports provided quantitative data that supported a budgetary increase in nurse staffing and a more flexible nurse staffing scheduling system to meet the needs of the patients. The project was successfully implemented in all four of the hospital system maternity units.Clinical Implications: Use of EHR in labor and delivery units is nearly universal. Working with the information technology specialists to integrate nurse staffing data into the EHR is one way to align nurse staffing with the AWHONN nurse staffing standards in real-time and for projections of nurse staffing needs based on unit historical patient data.

Psychometric properties of the perinatal missed care survey and missed care during labor and birth

Aim:

To evaluate the psychometric characteristics of the Perinatal Missed Care Survey and assess the prevalence of nurse-reported missed care during labor and birth.

Background:

Nursing care during labor and birth differs from other nursing care. Empirical evidence is scant regarding nursing quality and missed nursing care during labor and birth, which are important aspects of quality in maternity care.

Methods:

We conducted exploratory and confirmatory factor analysis on a previously developed perinatal missed nursing care instrument using data from 3,466 registered nurses. Measures included missed nursing care, reasons for missed nursing care, and demographic characteristics. All birth hospitals in each of 37 states were invited to distribute surveys electronically via email to their labor and delivery RN staff. The overall response rate from 277 hospitals that facilitated the survey was 35%.

Results:

Some missed care was reported for each of 25 missed care items. Labor support, intake and output, patient teaching, timely documentation, timely medication administration, and thorough review of prenatal records were missed at least occasionally by >50% respondents. Labor resources (83%), material resources (77%), and communication (60%) were reported reasons for missed nursing care. Exploratory factor analysis aligned with previous testing. Confirmatory factor analysis demonstrated good model fit.

Conclusions:

The Perinatal Missed Care Survey demonstrates good validity and reliability as a measure of missed nursing care during labor and birth. Our findings suggest missed nursing care during labor and birth is prevalent and occurs in aspects of care that could contribute to patient harm when missed.

Maternal-Fetal Surgery: Does Recognising Fetal Patienthood Pose a Threat to Pregnant Women's Autonomy?

Maternal–fetal surgery (MFS) encompasses a range of innovative procedures aiming to treat fetal illnesses and anomalies during pregnancy. Their development and gradual introduction into healthcare raise important ethical issues concerning respect for pregnant women’s bodily integrity and autonomy. This paper asks what kind of ethical framework should be employed to best regulate the practice of MFS without eroding the hard-won rights of pregnant women. I examine some existing models conceptualising the relationship between a pregnant woman and the fetus to determine what kind of framework is the most adequate for MFS, and conclude that an ecosystem or maternal–fetal dyad model is best suited for upholding women’s autonomy. However, I suggest that an appropriate framework needs to incorporate some notion of fetal patienthood, albeit a very limited one, in order to be consistent with the views of healthcare providers and their pregnant patients. I argue that such an ethical framework is both theoretically sound and fundamentally respectful of women’s autonomy, and is thus best suited to protect women from coercion or undue paternalism when deciding whether to undergo MFS.

AWHONN Members' Recommendations on What to Include in Updated Standards for Professional Registered Nurse Staffing for Perinatal Units

OBJECTIVE

To solicit advice from members of the Association of Women's Health, Obstetric, and Neonatal Nurses (AWHONN) on what to include in an update of nurse staffing standards.

DESIGN

Online, single-question survey with thematic analysis of responses.

SETTING

Electronic survey link sent via e-mail.

PARTICIPANTS

AWHONN members who shared their e-mail with the association and who responded to the survey (n = 1,813).

MEASURES

Participants were asked to answer this single question: "The AWHONN (2010) Guidelines for Professional Registered Nurse Staffing for Perinatal Units are being updated. During their initial development, feedback from nearly 900 AWHONN members was extremely helpful in providing specific details for the nurse staffing guidelines. We'd really like to hear from you again. Please give the writing team your input. What should AWHONN consider when updating the AWHONN nurse staffing guidelines?"

RESULTS

The e-mail was successfully delivered to 20,463 members; 8,050 opened the e-mail, and 3,050 opened the link to the survey. There were 1,892 responses. After removing duplicate and blank responses, 1,813 responses were available for analysis. They represented all hospital practice settings for maternity and newborn care and included nurses from small-volume and rural hospitals. Primary concerns of respondents centered on two aspects of patient acuity-the increasing complexity of clinical cases and the need to link nurse staffing standards to patient acuity. Other themes included maintaining current nurse-to-patient ratios, needing help with implementation in the context of economic challenges, and changing wording from "guidelines" to "standards" to promote widespread adoption.

CONCLUSION

In a single-question survey, AWHONN members offered rich, detailed recommendations that were used in the updating of the AWHONN nurse staffing standards.