Birth Outcomes, Intervention Frequency, and the Disappearing Midwife-Potential Hazards of Central Fetal Monitoring: A Single Center Review

Factors associated with spontaneous vaginal birth in nulliparous women: A descriptive systematic review

PROBLEM

Spontaneous vaginal birth (SVB) rates for nulliparous women are declining internationally.

BACKGROUND

There is inadequate understanding of factors affecting this trend overall and limited large-scale responses to improve women's opportunity to birth spontaneously.

AIM

To undertake a descriptive systematic review identifying factors associated with spontaneous vaginal birth at term, in nulliparous women with a singleton pregnancy.

METHODS

Quantitative studies of all designs, of nulliparous women with a singleton pregnancy and cephalic presentation, who experienced a SVB at term were included. Nine databases were searched (inception to October 2022). Two reviewers undertook quality appraisal; Randomised Controlled Trials (RCTs) with high risk of bias (ROB 2.0) and other designs with (QATSDD) scoring ≤ 50% were excluded.

FINDINGS

Data were abstracted from 90 studies (32 RCTs, 39 cohort, 9 cross-sectional, 4 prevalence, 5 case control, 1 quasi-experimental). SVB rates varied (13%-99%). Modifiable factors associated with SVB included addressing fear of childbirth, low impact antenatal exercise, maternal positioning during second-stage labour and midwifery led care. Complexities arising during pregnancy and regional analgesia were shown to decrease SVB and other interventions, such as routine induction of labour were equivocal.

DISCUSSION

Antenatal preparation (low impact exercise, childbirth education, addressing fear of childbirth) may increase SVB, as does midwifery continuity-of-care. Intrapartum strategies to optimise labour progression emerged as promising areas for further research.

CONCLUSION

Declining SVB rates may be improved through multi-factorial approaches inclusive of maternal, fetal and clinical care domains. However, the variability of SVB rates testifies to the complexity of the issue.

"My whole room went into chaos because of that thing in the corner": Unintended consequences of a central fetal monitoring system

OBJECTIVE

Technologies for fetal heart rate monitoring have been widely introduced despite evidence of no improvement in perinatal outcomes. A significant body of research has raised concerns that healthcare information technologies can have unintended consequences. We sought to describe an unintended consequence of central fetal monitoring technology.

DESIGN

The research was conducted as an Institutional Ethnography. Data generated from interviews, focus groups, and observations were analysed to generate an account of midwives' experiences with the central fetal monitoring system.

SETTING

The birthing unit of one Australian maternity service with a central fetal monitoring system.

INFORMANTS

34 midwives and midwifery students who worked with the central fetal monitoring system.

FINDINGS

Midwives described a disruptive social event they named being K2ed. Clinicians responded to perceived cardiotocograph abnormalities by entering the birth room despite the midwife not having requested assistance. Being K2ed disrupted midwives' clinical work and generated anxiety. Clinical communication was undermined, and midwives altered their clinical practice. Midwives performed additional documentation work to attempt to avoid being K2ed.

KEY CONCLUSIONS

This is the first report of an unintended consequence relating to central fetal monitoring, demonstrating how central fetal monitoring technology potentially undermines safety by impacting on clinical and relational processes and outcomes in maternity care.

IMPLICATIONS FOR PRACTICE

Current evidence does not support implementation or ongoing use of central fetal monitoring systems. Further research is needed to inform scaling down central fetal monitoring systems in a safe and supported way.

"I'm not doing what I should be doing as a midwife": An ethnographic exploration of central fetal monitoring and perceptions of clinical safety

BACKGROUND

Central fetal monitoring systems transmit cardiotocograph data to a central site in a maternity service. Despite a paucity of evidence of safety, the installation of central fetal monitoring systems is common.

AIM

This qualitative research sought to explore whether, and how, clinicians modified their clinical safety related behaviours following the introduction of a central monitoring system.

METHODS

An Institutional Ethnographic enquiry was conducted at an Australian hospital where a central fetal monitoring system had been installed in 2016. Informants (n=50) were midwifery and obstetric staff. Data collection consisted of interviews and observations that were analysed to understand whether and how clinicians modified their clinical safety related behaviours.

FINDINGS

The introduction of the central monitoring system was associated with clinical decision making without complete clinical information. Midwives' work was disrupted. Higher levels of anxiety were described for midwives and birthing women. Midwives reported higher rates of intervention in response to the visibility of the cardiotocograph at the central monitoring station. Midwives described a shift in focus away from the birthing woman towards documenting in the central monitoring system.

DISCUSSION

The introduction of central fetal monitoring prompted new behaviours among midwifery and obstetric staff that may potentially undermine clinical safety.

CONCLUSION

This research raises concerns that central fetal monitoring systems may not promote safe intrapartum care. We argue that research examining the safety of central fetal monitoring systems is required.

Midwives must, obstetricians may: An ethnographic exploration of how policy documents organise intrapartum fetal monitoring practice

BACKGROUND

The capacity for midwifery to improve maternity care is under-utilised. Midwives have expressed limits on their autonomy to provide quality care in relation to intrapartum fetal heart rate monitoring.

AIM

To explore how the work of midwives and obstetricians was textually structured by policy documents related to intrapartum fetal heart rate monitoring.

METHODS

Institutional Ethnography, a critical qualitative approach was used. Data were collected in an Australian hospital with a central fetal monitoring system. Midwives (n=34) and obstetricians (n=16) with experience working with the central fetal monitoring system were interviewed and observed. Policy documents were collected and analysed.

FINDINGS

Midwives' work was strongly structured by policy documents that required escalation of care for any CTG abnormality. Prior to being able to escalate care, midwives were often interrupted by other clinicians uninvited entry into the room in response to the CTG seen at the central monitoring station. While the same collection of documents guided the work of both obstetricians and midwives, they generated the expectation that midwives must perform certain tasks while obstetricians may perform others. Midwifery work was textually invisible.

DISCUSSION AND CONCLUSION

Our findings provide a concrete example of the way policy documents both reflect and generate power imbalances in maternity care. Obstetric ways of knowing and doing are reinforced within these documents and continue to diminish the visibility and autonomy of midwifery. Midwifery organisations are well placed to co-lead policy development and reform in collaboration with maternity consumer and obstetric organisations.

Computerized analysis of cardiotocograms and ST signals is associated with significant reductions in hypoxic-ischemic encephalopathy and cesarean delivery: an observational study in 38,466 deliveries

BACKGROUND

Intrapartum cardiotocography is widely used in high-resource countries and remains at the center of fetal monitoring and the decision to intervene, but there is ample evidence of poor reliability in visual interpretation as well as limited accuracy in identifying fetal hypoxia. Combined monitoring of intrapartum cardiotocography and ST segment signals was developed to increase specificity, but analysis relies heavily on intrapartum cardiotocography interpretation and is therefore also affected by the previously referred problems. Computerized analysis was developed to overcome these limitations, aiding in the quantification of parameters that are difficult to evaluate visually, such as variability, integrating the complex guidelines of combined intrapartum cardiotocography and ST analysis, and using visual and sound alerts to prompt health care professionals to reevaluate features associated with fetal hypoxia.

OBJECTIVE

The objective of the study was to evaluate the effect of introducing a central fetal monitoring system with computerized analysis of intrapartum cardiotocography and ST signals into the labor ward of a tertiary care university hospital in which all women are continuously monitored with intrapartum cardiotocography. The incidence of adverse perinatal outcomes and intervention rates was evaluated over time.

STUDY DESIGN

In this retrospective cohort study, yearly rates of hypoxic-ischemic encephalopathy, instrumental vaginal delivery, overall cesarean delivery, and urgent cesarean delivery were obtained from the hospital's clinical databases. The rates occurring in the period from January 2001 to December 2003, before the introduction of the central monitoring system with computerized analysis of intrapartum cardiotocography and ST signals (Omniview-SisPorto), were compared with those occurring from January 2004 to December 2014, after the introduction of the system. All rates were calculated with 95% confidence intervals.

RESULTS

A total of 38,466 deliveries occurred during this period. After introduction of the system, there was a significant decrease in the number of hypoxic-ischemic encephalopathy cases per 1000 births (5.3%, 95% confidence interval [4.0-7.0] vs 2.2%, 95% confidence interval [1.7-2.8]; relative risk, 0.42, 95% confidence interval [0.29-0.61]), overall cesarean delivery rates (29.9%, 95% confidence interval [28.9-30.8] vs 28.3%, 95% confidence interval [27.8-28.8]; relative risk, 0.96, 95% confidence interval [0.92-0.99]), and urgent cesarean deliveries (21.6%, 95% confidence interval [20.7-22.4] vs 19.2%, 95% confidence interval [18.8-19.7]; relative risk, 0.91, 95% confidence interval [0.87-0.95]). The instrumental vaginal delivery rate increased (19.5%, 95% confidence interval [18.7-20.3] vs 21.4%, 95% confidence interval [21.0-21.9; relative risk, 1.07, 95% confidence interval 1.02-1.13].

CONCLUSION

Introduction of computerized analysis of intrapartum cardiotocography and ST signals in a tertiary care hospital was associated with a significant reduction in the incidence of hypoxic-ischemic encephalopathy and a modest reduction in cesarean deliveries.