Intermittent Auscultation for Intrapartum Fetal Heart Rate Surveillance: American College of Nurse‐Midwives

How well can the fetal heart rate baseline be assessed by intrapartum intermittent auscultation? An interrater reliability and agreement study

BACKGROUND

We aimed to examine the inter-reliability and agreement among midwives when assessing the fetal heart rate (FHR) using the handheld Doppler. The primary aim was to measure the reliability and agreement of FHR baseline (baseline) as beats per minute (bpm). The secondary aims were to measure fluctuations from the baseline, defined as increases and decreases, and classifications (normal or abnormal) of FHR soundtracks. This is the first interrater reliability and agreement study on intermittent auscultation (IA) to our knowledge.

METHODS

The participant population consisted of 154 women in labor, from a mixed-risk population and admitted to hospital for intrapartum care. The rater population were 16 midwives from various maternity care settings in Norway. A total of 154 soundtracks were recorded with a handheld Doppler device, and the 16 raters assessed 1-min soundtracks once, through an online survey (Nettskjema). They assessed the baseline, FHR increase or decrease, and the FHR classification. The primary outcome, baseline, was measured with intraclass correlation coefficient (ICC). The secondary outcomes were measured with kappa and proportion of agreement.

RESULTS

The interrater reliability for the baseline (bpm) was ICC(A,1) 0.74 (95% CI 0.69-0.78). On average, an absolute difference of 7.9 bpm (95% CI 7.3-8.5 bpm) was observed between pairs of raters.

CONCLUSION

Our results demonstrate an acceptable level of reliability and agreement in assessing the baseline using a handheld Doppler.

Fetal Heart Rate Auscultation, 4th Edition

Intermittent auscultation (IA) is an evidence-based method of fetal surveillance during labor for birthing people with low-risk pregnancies. It is a central component of efforts to reduce the primary cesarean rate and promote vaginal birth (American College of Obstetricians and Gynecologists, 2019; Association of Women's Health, Obstetric and Neonatal Nurses, 2022a). The use of intermittent IA decreased with the introduction of electronic fetal monitoring, while the increased use of electronic fetal monitoring has been associated with an increase of cesarean births. This practice monograph includes information on IA techniques; interpretation and documentation; clinical decision-making and interventions; communication; education, staffing, legal issues; and strategies to implement IA.

Fetal Heart Rate Auscultation, 4th Edition

Intermittent auscultation (IA) is an evidence-based method of fetal surveillance during labor for birthing people with low-risk pregnancies. It is a central component of efforts to reduce the primary cesarean rate and promote vaginal birth (American College of Obstetricians and Gynecologists, 2019; Association of Women's Health, Obstetric and Neonatal Nurses, 2022a). The use of intermittent IA decreased with the introduction of electronic fetal monitoring, while the increased use of electronic fetal monitoring has been associated with an increase of cesarean births. This practice monograph includes information on IA techniques; interpretation and documentation; clinical decision-making and interventions; communication; education, staffing, legal issues; and strategies to implement IA.

Birth Outcomes for Planned Home and Licensed Freestanding Birth Center Births in Washington State

OBJECTIVE

To describe rates of maternal and perinatal birth outcomes for community births and to compare outcomes by planned place of birth (home vs state-licensed, freestanding birth center) in a Washington State birth cohort, where midwifery practice and integration mirrors international settings.

METHODS

We conducted a retrospective cohort study including all births attended by members of a statewide midwifery professional association that were within professional association guidelines and met eligibility criteria for planned birth center birth (term gestation, singleton, vertex fetus with no known fluid abnormalities at term, no prior cesarean birth, no hypertensive disorders, no prepregnancy diabetes), from January 1, 2015 through June 30, 2020. Outcome rates were calculated for all planned community births in the cohort. Estimated relative risks were calculated comparing delivery and perinatal outcomes for planned births at home to state-licensed birth centers, adjusted for parity and other confounders.

RESULTS

The study population included 10,609 births: 40.9% planned home and 59.1% planned birth center births. Intrapartum transfers to hospital were more frequent among nulliparous individuals (30.5%; 95% CI 29.2-31.9) than multiparous individuals (4.2%; 95% CI 3.6-4.6). The cesarean delivery rate was 11.4% (95% CI 10.2-12.3) in nulliparous individuals and 0.87% (95% CI 0.7-1.1) in multiparous individuals. The perinatal mortality rate after the onset of labor (intrapartum and neonatal deaths through 7 days) was 0.57 (95% CI 0.19-1.04) per 1,000 births. Rates for other adverse outcomes were also low. Compared with planned birth center births, planned home births had similar risks in crude and adjusted analyses.

CONCLUSION

Rates of adverse outcomes for this cohort in a U.S. state with well-established and integrated community midwifery were low overall. Birth outcomes were similar for births planned at home or at a state-licensed, freestanding birth center.

Neonatal Outcomes After Delivery in Water

OBJECTIVE

To assess neonatal intensive care unit (NICU) admissions and neonatal outcomes after water birth or land birth in an alternative birthing center.

METHODS

We conducted a prospective observational study of preselected low-risk parturients separated into three groups depending on their location for labor and delivery: land-land, water-land, and water-water. Delivery outcomes, labor length, maternal pain assessment, need for newborn resuscitation, and NICU admission and diagnoses were collected. The primary outcome was admission to the NICU.

RESULTS

There were 2,077 total deliveries from April 2015 to December 2019, consisting of 458 land-land deliveries, 730 water-land deliveries, and 889 water-water deliveries. The rate of NICU admission was 2.8% (95% CI 1.5-4.8%) for land-land deliveries, 4.1% (2.8-5.8%) for water-land deliveries, and 2.0% (1.2-3.2%) for water-water deliveries. A post hoc power analysis revealed a 70% power to detect a 2.1% difference in NICU admissions between the water-land and water-water groups.

CONCLUSION

In this cohort of low-risk pregnant women, births in water and on land were associated with similar rates of admission to the NICU.

What Do Women Want? Consent for the Use of Electronic Fetal Monitoring

BACKGROUND

Guidelines published by professional associations of midwives, obstetricians, and nurses in the United States recommend against using continuous cardiotocography (CTG) in low-risk patients. In the United States, CTG or electronic fetal/uterine monitoring (EFM) rather than auscultation with a fetoscope or Pinard horn is the norm. Interpretation of the fetal heart rate (FHR) and uterine activity (UA) tracings provided by continuous EFM may be associated with the decision for a cesarean birth. Typically, consent is not sought in the decision about type of monitoring. No studies were identified where women's attitudes about the need to consent to the type of fetal monitoring used during labor have been explored. Therefore, the purpose of this research was to examine women's attitudes about the use of EFM in a healthcare setting.

METHODS

We asked a sample of women aged 18–50 years to respond to one of three monitoringscenarios. The scenarios were used to distinguish between attitudes about monitoring in general, monitoring the health of a mother in labor, and monitoring the health of the fetus during labor. Wemeasured their level of interest in being monitored and their opinions about whether healthcare providers should be required to obtain consent for the monitoring described in the scenario.

RESULTS

Interest in receiving monitoring (across all three scenarios) was moderate, with the highest level of interest in monitoring the fetus during labor and the least interest in monitoring a general health context. Across all scenarios, 82% of respondents believed that practitioners should obtain consent for monitoring, 14% were unsure, and 4% said there should not be a requirement for consent. While low (6%), the percentage responding that consent was not needed was highest in monitoring a fetus in labor.

CONCLUSIONS

Women in our study expressed a strong preference for the opportunity to consent to the use of monitoring regardless of the healthcare scenario. There is findings suggest the need for further research exploring what women do and do not know about CTG and what their informed performance are a pressing need to rethink the role of a pressing need to rethink the role of shared decision-making and informed consent about the type of monitoring use during labor.

Low-Intervention Birth Suites Within a Community Hospital: An Innovative Approach to Perinatal Services

Perinatal care leaders at a community hospital located in the Denver, Colorado metropolitan area searched for an innovative way to provide a low-intervention option that promoted physiologic birth for women seeking intrapartum care. This reasonably priced project focused on the transformation of traditional labor and delivery rooms into birth suites and included installation of birth slings, full-size beds with home-like mattresses, new sleep sofas for the partners, and the removal of computer screens and electronic fetal monitors. In addition, the team wrote a specific birth suite policy, provided nurse education focused on intermittent auscultation and labor support techniques, and developed a birth suite curriculum for patient education. This innovative model of care demonstrated outcomes similar to those seen in community-based birth centers and received positive feedback from families who labored and gave birth in these suites. In the instance when the birth suite is no longer the appropriate environment for intrapartum care secondary to risk factors, a woman's preference, or obstetric emergency management, this model allows for expeditious transfer of the woman or newborn to a location where an appropriate higher level of care can be provided. Converting 2 labor and delivery rooms to low-intervention birth suites required minimal funding and enabled a community hospital in Colorado to expand its perinatal services to women who are seeking low-intervention birth options that promote physiologic birth.

[Normal childbirth: Physiologic labor support and medical procedures. Guidelines of the French National Authority for Health (HAS) with the collaboration of the French College of Gynaecologists and Obstetricians (CNGOF) and the French College of Midwives (CNSF) - Initial assessment on admission and fetal monitoring during labor]

OBJECTIVES

The purpose of this literature's review is to provide recommendations for measures to assess fetal "well-being" at admission and during labor in order to identify a non-reassuring fetal condition.

METHODS

Consultation of the Medline database, and of national and international guidelines.

RESULTS

Two fetal heart rate monitoring techniques are available at admission and during labor. In comparison with intermittent auscultation (AI), continuous cardiotocography (CTG) monitoring was associated, in a meta-analysis involving 13 trials including more than 37,000 women, with a reduction in RR neonatal seizures by half. Relative risk (RR)=0.50 with a 95% CI [0.31-0.80] without significant difference objectified with respect to cerebral palsy RR=1.75 95% CI [0.84-3.63]. In contrast, a significant increase in cesarean sections was associated with continuous CTG RR=1.63 95% CI [1.29-2.07] and women were also at greater risk for operative vaginal delivery RR=1.15 95% CI [1.01-1.33]. Current results are insufficient to demonstrate the actual impact of surveillance methods (continuous or discontinuous) on the overall perinatal mortality rate. Larger randomized trials remain to be conducted.

CONCLUSION

The systematic search for the confirmation of the reassuring character of the fetal state at admission and during labor makes it possible to identify intrapartum hypoxic events.

Intermittent auscultation (surveillance) of fetal heart rate in labor: a progressive evidence-backed approach with aim to improve methodology, reliability and safety

Intermittent auscultation (IA) of fetal heart has become acceptable in low risk labors even in the developed countries. However, the instances of birth asphyxia occur despite adhering to the guidelines. Such outcomes need not be the inherent limitations of IA, but improvements in the IA regime are highly desirable. The systematic analyses of available studies have been unhelpful to ascertain an optimal regime or suggest improvements. This analytical review uses detailed modeling and reasoning to examine/propose safe and effective regime. It counters a misconception that the Doppler-device is not superior to Pinard stethoscope in usability, accuracy and thereby decision making. Importantly, the Doppler-device should not be used to actually count the fetal heart tones (like a Pinard stethoscope) as insisted by many guidelines. The review demonstrates that counting to 120-160 over a minute is arduous, superfluous and fraught with fallacies and risks. Observation of the digital read-out of the fetal heart rate (FHR) and its trend during the auscultation duration is far more informative. IA should focus on the two FHR parameters namely the baseline and late decelerations. Detection of additional FHR changes like overshoots, cycling or accelerations do not add value. Doppler-device FHR readouts over a steady pattern (commonly just before the contraction) best represent the baseline. FHR observation (IA) should commence in the later part of the contraction and continue till the beginning of next contraction and need not arbitrarily end at 1 min (a legacy of preoccupation with actual counting). Heightened awareness is required to detect late decelerations at the end of contractions. It would suffice to perform IA over a couple of contractions every 20-30 min during the first stage of labor. This improved methodology would avoid mistakes and improve the detection of FHR abnormalities to enhance patient safety in future practice guidelines.

A Multimethod Improvement Project to Strengthen Intermittent Auscultation Practice Among Nurse-Midwives and Nurses

INTRODUCTION

Intermittent auscultation (IA) is an accepted standard of care for intrapartum fetal assessment for low-risk individuals and is the exclusive method used to monitor fetal status in birth centers. However, there are conflicting national guidelines for practice and skill training. As a result, IA technique and skills vary across the perinatal care workforce, with many health care providers receiving no or minimal formal training. This article describes the design, implementation, and evaluation of a quality improvement program aimed at strengthening the IA skills of nurse-midwives and nurses.

PROCESS

The project was implemented in a multisite network of freestanding birth centers and involved clinical practice guideline development, simulation-based training, audit and feedback, in-person training, and electronic health record configuration.

OUTCOMES

The training resulted in self-reported increases in knowledge in all areas assessed. The integrated quality improvement initiative resulted in substantial improvements in consistency of practice and documentation.

DISCUSSION

Policy change was not sufficient to improve use of IA, a nuanced skill that many midwives and nurses have limited exposure to in basic education programs and hospital-based clinical practice. Clinical improvement was possible when the policy change was accompanied by a comprehensive training and implementation strategy including interactive, simulation-based learning, audit and feedback, and an electronic health record configuration that better reflected the documentation standards.

Maternity Providers' Perspectives on Barriers to Utilization of Intermittent Fetal Monitoring: A Qualitative Study

There are 2 approaches to fetal assessment during labor: continuous electronic fetal monitoring (EFM) and intermittent auscultation (IA). The vast majority of healthy labors in the United States use EFM, despite professional organization recommendations against its use for low-risk pregnancies. This qualitative investigation explores maternity care team members' perspectives on why EFM is the dominant approach to fetal assessment instead of IA. Focus groups comprised of nurses, midwives, and physicians were conducted using a semistructured interview guide. Transcripts were analyzed using directed content analysis to identify themes related to clinical and nonclinical factors influencing the type of fetal assessment employed during labor. Seven focus groups with a total of 41 participants were completed. Seven themes were identified: clinical environment; technology; policies, procedures, and evidence-based protocols; patient-centered influences; fear of liability; providers as members of healthcare team; and deflection of responsibility. All maternity care team members had knowledge of the evidence base supporting IA use for low-risk care. Nurses identified unique challenges in having agency over monitoring decision making and executing best practices. Improved communication among team members can facilitate evidence-based approaches to IA use, facilitating increased utilization for low-risk labor care.

Prevalence and causes of cesarean births among women residing at high altitude in Lhasa, Tibet: A retrospective observational study of 7365 women

OBJECTIVE

Currently, there is paucity of data on the rate of vaginal deliveries and cesarean section among women in Tibet. In this study, we carried out an observational study of 7365 consecutive pregnant women in Lhasa, Tibet who gave birth at our tertiary care institution between 2012 and 2015.

MATERIALS AND METHODS

In this retrospective study, we reviewed the hospital records for demographic data, obstetric history, and the number of vaginal and emergency cesarean section deliveries. The overall and annual rate of vaginal and cesarean section deliveries was calculated. Causes, indications or risks for cesarean section were also analyzed.

RESULTS

During the review period, 7365 neonates were delivered at our hospital, including 1690 (23.0%) deliveries via cesarean section. The yearly rate of cesarean section progressively declined from 26.7% in 2012 to 18% in 2015 (P < 0.001). Furthermore, the annual rate of emergency cesarean section declined 53.9%between 2012 and 2015(P < 0.001). Fetal risk factors (39.9%) and maternal risk factors (40.3%) were the major causes of cesarean section in the women. Social factors as a cause of cesarean section fluctuated between 7.9% and 11.1%.

CONCLUSION

This study has demonstrated a steady decline in the annual rate of cesarean section in women in Tibet between 2012 and 2015. A decrease in the rate of emergency cesarean section contributed substantially to this decline. Moreover, approximately 10% caesarian sections were performed without clear indications, highlighting the need for strengthening prenatal counseling for pregnant women in Tibet.

Intermittent auscultation fetal monitoring during labour: A systematic scoping review to identify methods, effects, and accuracy

BACKGROUND

Intermittent auscultation (IA) is the technique of listening to and counting the fetal heart rate (FHR) for short periods during active labour and continuous cardiotocography (CTC) implies FHR monitoring for longer periods. Although the evidence suggests that IA is the best way to monitor healthy women at low risk of complications, there is no scientific evidence for the ideal device, timing, frequency and duration for IA. We aimed to give an overview of the field, identify and describe methods and practices for performing IA, map the evidence and accuracy for different methods of IA, and identify research gaps.

METHODS

We conducted a systematic scoping review following the Joanna Briggs methodology. Medline, EMBASE, Cinahl, Maternity & Infant Care, Cochrane Library, SveMed+, Web of Science, Scopus, Lilacs and African Journals Online were searched for publications up to January 2019. We did hand searches in relevant articles and databases. Studies from all countries, international guidelines and national guidelines from Denmark, United Kingdom, United States, New Zealand, Australia, The Netherlands, Sweden, Denmark, and Norway were included. We did quality assessment of the guidelines according to the AGREEMENT tool. We performed a meta-analysis assessing the effects of IA with a Doppler device vs. Pinard device using methods described in The Cochrane Handbook, and we performed an overall assessment of the summary of evidence using the GRADE approach.

RESULTS

The searches generated 6408 hits of which 26 studies and 11 guidelines were included in the review. The studies described slightly different techniques for performing IA, and some did not provide detailed descriptions. Few of the studies provided details of normal and abnormal IA findings. All 11 guidelines recommended IA for low risk women, although they had slightly different recommendations on the frequency, timing, and duration for IA, and the FHR characteristics that should be observed. Four of the included studies, comprising 8436 women and their babies, were randomised controlled trials that evaluated the effect of IA with a Doppler device vs. a Pinard device. Abnormal FHRs were detected more often using the Doppler device than in those using the Pinard device (risk ratio 1.77; 95% confidence interval 1.29-2.43). There were no significant differences in any of the other maternal or neonatal outcomes. Four studies assessed the accuracy of IA findings. Normal FHR was easiest to identify correctly, whereas identifying periodic FHR patterns such as decelerations and saltatory patterns were more difficult.

CONCLUSION

Although IA is the recommended method, no trials have been published that evaluate protocols on how to perform it. Nor has any study assessed interrater agreements regarding interpretations of IA findings, and few have assessed to what degree clinicians can describe FHR patterns detected by IA. We found no evidence to recommend Doppler device instead of the Pinard for IA, or vice versa.

Healthy Birth Practice #1: Let Labor Begin on Its Own

Current evidence and professional organizations identify letting labor begin on its own as one of the most important strategies for promoting normal, physiologic birth. It also prevents iatrogenic prematurity and the need for high-tech medical interventions required for labor induction. Because the American College of Obstetricians and Gynecologists (ACOG) now states that it is reasonable for obstetric care providers to offer induction at 39 weeks to low-risk nulliparous women, it is more important than ever for childbirth educators to be familiar with best evidence on letting labor begin on its own.

Healthy Birth Practice #4: Avoid Interventions Unless They Are Medically Necessary

Maternity care in the United States continues to be intervention intensive. The routine use of intravenous fluids, restrictions on eating and drinking, continuous electronic fetal monitoring, epidural analgesia, and augmentation of labor characterize most U.S. births. The use of episiotomy has decreased but is still higher than it should be. These interventions disturb the normal physiology of labor and birth and restrict women's ability to cope with labor. The result is a cascade of interventions that increase risk, including the risk of cesarean surgery, for women and babies. This paper describes the use and effect of routine interventions on the physiologic process of labor and birth and identifies the unintended consequences resulting from the routine use of these interventions in labor and birth.

Fetal Heart Rate Auscultation, 3rd edition

The use of intermittent auscultation (IA) for fetal surveillance during labor decreased with the introduction of electronic fetal monitoring (EFM). The increased use of EFM is associated with an increase in cesarean births. IA is an evidence-based method of fetal surveillance during labor for women with low risk pregnancies and considered one component of comprehensive efforts to reduce the primary cesarean rate and promote vaginal birth. Many clinicians are not familiar with IA practice. This practice monograph includes information on IA techniques; interpretation and documentation; clinical decision-making and interventions; communication; education, staffing, legal issues, and strategies to promote implementation of IA into practice.

Electronic Fetal Monitoring Documentation: Connecting Points for Quality Care and Communication

Contemporaneous, complete, and objective documentation is the foundation for continuity of patient care and facilitates communication between all levels of healthcare clinicians. The impact of electronic fetal monitoring on obstetric safety has become a high priority, with documentation being essential to evaluating care quality. Over several decades, electronic fetal monitoring documentation has reached a higher level of precision because paper is being replaced with health information technology that incorporates system's features such as checklists, drop-down boxes, and decision analysis. The intent of this article is to provide a synopsis of important concepts regarding electronic fetal monitoring documentation and liability-reduction strategies for perinatal nurses.

Inadequate fetal heart rate monitoring and poor use of partogram associated with intrapartum stillbirth: a case-referent study in Nepal

Background

Newborns are at the greatest risk for dying during the intrapartum period, including labor and delivery, and the first day of life. Fetal heart rate monitoring (FHRM) and partogram use to track labor progress are evidence-based techniques that can help to identify maternal and fetal risk factors so that these can be addressed early. The objective of this study was to assess health worker adherence to protocols for FHRM and partogram use during the intrapartum period, and to assess the association between adherence and intrapartum stillbirth in a tertiary hospital of Nepal.

Methods

A case-referent study was conducted over a 15-month period. Cases included all intrapartum stillbirths, while 20 % of women with live births were randomly selected on admission to make up the referent population. The frequency of FHRM and the use of partogram were measured and their association to intrapartum stillbirth was assessed using logistic regression analysis.

Results

During the study period, 4,476 women with live births were enrolled as referents and 136 with intrapartum stillbirths as cases. FHRM every 30 min was only completed in one-fourth of the deliveries, and labor progress was monitored using a partogram in just over half. With decreasing frequency of FHRM, there was an increased risk of intrapartum stillbirth; FHRM at intervals of more than 30 min resulted in a four-fold risk increase for intrapartum stillbirth (aOR 4.17, 95 % CI 2.0–8.7), and the likelihood of intrapartum stillbirth increased seven times if FHRM was performed less than every hour or not at all (aOR 7.38, 95 % CI 3.5–15.4). Additionally, there was a three-fold increased risk of intrapartum stillbirth if the partogram was not used (aOR 3.31, 95 % CI 2.0–5.4).

Conclusion

The adherence to FHRM and partogram use was inadequate for monitoring intrapartum progress in a tertiary hospital of Nepal. There was an increased risk of intrapartum stillbirth when fetal heart rate was inadequately monitored and when the progress of labor was not monitored using a partogram. Further exploration is required in order to determine and understand the barriers to adherence; and further, to develop tools, techniques and interventions to prevent intrapartum stillbirth.

Clinical trial registration

ISRCTN97846009.

The More Things Change, the More They Stay the Same: Thirty Years of Fetal Monitoring in Perspective

Thirty years ago, the inaugural issue of The Journal of Perinatal & Neonatal Nursing was published and the entire perinatal portion of the journal was devoted to electronic fetal monitoring (EFM). This article provides a historical perspective on EFM in perinatal care since the 1980s by exploring the similarities and differences of the state of the science presented in that first issue. Both EFM and intermittent auscultation are discussed.