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Geva N, Geva Y, Katz L, Binyamin Y, Rotem R, Weintraub AY, Yaniv Salem S. Correlation between total deceleration area in CTG records and cord blood pH in pregnancies with IUGR. Arch Gynecol Obstet 2024; 310:1425-1431. [PMID: 38225432 DOI: 10.1007/s00404-023-07240-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Accepted: 09/14/2023] [Indexed: 01/17/2024]
Abstract
PURPOSE Fetal cardiotocography is the most common method to assess fetal well-being during labor. Nevertheless, its predictive ability for acidemia is limited, both in low-risk and high-risk pregnancies (Nelson et al. in N Engl J Med 334: 613-9, 1996; Rinciples P et al. in Health and Human Development Workshop Report on Electronic Fetal Monitoring : Update on Definitions. no. 2007, 510-515, 2008), especially in high-risk pregnancies, such as those complicated by growth restriction. In this study we aim examine the association between deceleration and acceleration areas and other measure of fetal heart rate in intrapartum fetal monitoring and neonatal arterial cord blood pH in pregnancies complicated by growth restriction. MATERIALS AND METHODS A retrospective cohort study of 100 deliveries complicated by growth restriction, delivered during 2018, was conducted. Known major fetal anomalies, non-vertex presentation and elective cesarean deliveries were excluded. Total deceleration and acceleration areas were calculated as the sum of the areas within the deceleration and acceleration, respectively. RESULTS In deliveries complicated by growth restriction, cord blood pH is significantly associated with total deceleration area (p = 0.05) and correlates with cumulative duration of the decelerations (Spearman's rank -0.363, p < 0.05), and total acceleration area (-0.358, p < 0.05). By comparing the cord blood pH in deliveries with a total deceleration area that was above and below the median total deceleration area, we demonstrated a significant difference between the categories. CONCLUSIONS Cord blood pH significantly correlates with total deceleration area and other fetal monitoring characteristics in neonates with growth restriction. Future studies using real-time, machine-learning based techniques of fetal heart rate monitoring, may provide population specific threshold values that will support bedside clinical decision making and perhaps achieve better outcomes.
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Affiliation(s)
- Neta Geva
- Department of Neonatology, Ben-Gurion University of the Negev Faculty of Health Sciences, Sheril and Hain Saban Children Hospital, Soroka Medical Center, Beer-Sheva, Israel.
| | - Yael Geva
- Department of Obstetrics and Gynecology, Faculty of Health Sciences, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Lior Katz
- Pediatric Division, Rambam Health Care Campus, Haifa, Israel
| | - Yair Binyamin
- Department of Anesthesiology, Faculty of Health Sciences, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Reut Rotem
- Division of Obstetrics and Gynecology, Shaare Zedek Medical Center, Hebrew University Medical School, Jerusalem, Israel
| | - Adi Yehuda Weintraub
- Department of Obstetrics and Gynecology, Faculty of Health Sciences, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Shimrit Yaniv Salem
- Department of Obstetrics and Gynecology, Faculty of Health Sciences, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel
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McCoy JA, Levine LD, Wan G, Chivers C, Teel J, La Cava WG. Intrapartum electronic fetal heart rate monitoring to predict acidemia at birth with the use of deep learning. Am J Obstet Gynecol 2024:S0002-9378(24)00528-3. [PMID: 38663662 DOI: 10.1016/j.ajog.2024.04.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 04/17/2024] [Accepted: 04/18/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Electronic fetal monitoring is used in most US hospital births but has significant limitations in achieving its intended goal of preventing intrapartum hypoxic-ischemic injury. Novel deep learning techniques can improve complex data processing and pattern recognition in medicine. OBJECTIVE This study aimed to apply deep learning approaches to develop and validate a model to predict fetal acidemia from electronic fetal monitoring data. STUDY DESIGN The database was created using intrapartum electronic fetal monitoring data from 2006 to 2020 from a large, multisite academic health system. Data were divided into training and testing sets with equal distribution of acidemic cases. Several different deep learning architectures were explored. The primary outcome was umbilical artery acidemia, which was investigated at 4 clinically meaningful thresholds: 7.20, 7.15, 7.10, and 7.05, along with base excess. The receiver operating characteristic curves were generated with the area under the receiver operating characteristic assessed to determine the performance of the models. External validation was performed using a publicly available Czech database of electronic fetal monitoring data. RESULTS A total of 124,777 electronic fetal monitoring files were available, of which 77,132 had <30% missingness in the last 60 minutes of the electronic fetal monitoring tracing. Of these, 21,041 were matched to a corresponding umbilical cord gas result, of which 10,182 were time-stamped within 30 minutes of the last electronic fetal monitoring reading and composed the final dataset. The prevalence rates of the outcomes in the data were 20.9% with a pH of <7.2, 9.1% with a pH of <7.15, 3.3% with a pH of <7.10, and 1.3% with a pH of <7.05. The best performing model achieved an area under the receiver operating characteristic of 0.85 at a pH threshold of <7.05. When predicting the joint outcome of both pH of <7.05 and base excess of less than -10 meq/L, an area under the receiver operating characteristic of 0.89 was achieved. When predicting both pH of <7.20 and base excess of less than -10 meq/L, an area under the receiver operating characteristic of 0.87 was achieved. At a pH of <7.15 and a positive predictive value of 30%, the model achieved a sensitivity of 90% and a specificity of 48%. CONCLUSION The application of deep learning methods to intrapartum electronic fetal monitoring analysis achieves promising performance in predicting fetal acidemia. This technology could help improve the accuracy and consistency of electronic fetal monitoring interpretation.
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Affiliation(s)
- Jennifer A McCoy
- Maternal Fetal Medicine Research Program, Department of Obstetrics and Gynecology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA.
| | - Lisa D Levine
- Maternal Fetal Medicine Research Program, Department of Obstetrics and Gynecology, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - Guangya Wan
- School of Data Science, University of Virginia, Charlottesville, VA
| | | | - Joseph Teel
- Department of Family Medicine and Community Health, Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA
| | - William G La Cava
- Computational Health Informatics Program, Department of Pediatrics, Boston Children's Hospital, Harvard Medical School, Boston, MA
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Zullo F, Di Mascio D, Raghuraman N, Wagner S, Brunelli R, Giancotti A, Mendez-Figueroa H, Cahill AG, Gupta M, Berghella V, Blackwell SC, Chauhan SP. Three-tiered fetal heart rate interpretation system and adverse neonatal and maternal outcomes: a systematic review and meta-analysis. Am J Obstet Gynecol 2023; 229:377-387. [PMID: 37044237 DOI: 10.1016/j.ajog.2023.04.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 04/03/2023] [Accepted: 04/03/2023] [Indexed: 04/14/2023]
Abstract
OBJECTIVE This study aimed to evaluate the rate of adverse neonatal or maternal outcomes in parturients with fetal heart rate tracings categorized as I, II or, III within the last 30 to 120 minutes of delivery. DATA SOURCES The MEDLINE Ovid, Scopus, Embase, CINAHL, and Clinicaltrials.gov databases were searched electronically up to May 2022, using combinations of the relevant medical subject heading terms, keywords, and word variants that were considered suitable for the topic. STUDY ELIGIBILITY CRITERIA Only observational studies of term infants reporting outcomes of interest with category I, II, or III fetal heart rate tracings were included. STUDY APPRAISAL AND SYNTHESIS METHODS The coprimary outcome was the rate of either Apgar score <7 at 5 minutes or umbilical artery pH <7.00. Secondary outcomes were divided into neonatal and maternal adverse outcomes. Quality assessment of the included studies was performed using the Newcastle-Ottawa Scale. Random-effect meta-analyses of proportions were used to estimate the pooled rates of each categorical outcome in fetal heart rate tracing category I, II, and III patterns, and random-effect head-to-head meta-analyses were used to directly compare fetal heart rate tracings category I vs II and fetal heart rate tracing category II vs III, expressing the results as summary odds ratio or as mean differences with relative 95% confidence intervals. RESULTS Of the 671 articles reviewed, 3 publications met the inclusion criteria. Among them were 47,648 singletons at ≥37 weeks' gestation. Fetal heart rate tracings in the last 30 to 120 minutes before delivery were characterized in the following manner: 27.0% of deliveries had category I tracings, 72.9% had category II tracings, and 0.1% had category III tracings. A single study, which was rated to be of poor quality, contributed 82.1% of the data and it did not provide any data for category III fetal heart rate tracings. When compared with category I fetal heart rate tracings (0.74%), the incidence of an Apgar score <7 at 5 minutes were significantly higher among deliveries with category II fetal heart rate tracings (1.51%) (odds ratio, 1.56; 95% confidence interval, 1.23-1.99) and among those with category III tracings (14.63%) (odds ratio, 14.46; 95% confidence interval, 2.77-75.39). When compared with category II tracings, category III tracings also had a significantly higher likelihood of a low Apgar score at 5 minutes (odds ratio, 14.46; 95% confidence interval, 2.77-75.39). The incidence of an umbilical artery pH <7.00 were similar among those with category I and those with category II tracings (0.08% vs 0.24%; odds ratio, 2.85; 95% confidence interval, 0.41-19.55). When compared with category I tracings, the incidence of an umbilical artery pH <7.00 was significantly more common among those with category III tracings (31.04%; odds ratio, 161.56; 95% confidence interval, 25.18-1036.42); likewise, when compared with those with category II tracings, those with category III tracings had a significantly higher likelihood of having an umbilical artery pH <7.00 (odds ratio, 42.29; 95% confidence interval, 14.29-125.10). Hypoxic-ischemic encephalopathy occurred with similar frequency among those with categories I and those with category II tracings (0 vs 0.81%; odds ratio, 5.86; 95% confidence interval, 0.75-45.89) but was significantly more common among those with category III tracings (0 vs 18.97%; odds ratio, 61.43; 95% confidence interval, 7.49-503.50). Cesarean delivery occurred with similar frequency among those with category I (13.41%) and those with category II tracings (11.92%) (odds ratio, 0.87; 95% confidence interval, 0.72-1.05) but was significantly more common among those with with category III tracings (14.28%) (odds ratio, 3.97; 95% confidence interval, 1.62-9.75). When compared with those with category II tracings, cesarean delivery was more common among those with category III tracings (odds ratio, 4.55; 95% confidence interval, 1.88-11.01). CONCLUSION Although the incidence of an Apgar score <7 at 5 minutes and umbilical artery pH <7.00 increased significantly with increasing fetal heart rate tracing category, about 98% of newborns with category II tracings do not have these adverse outcomes. The 3-tiered fetal heart rate tracing interpretation system provides an approximate but imprecise measurement of neonatal prognosis.
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Affiliation(s)
- Fabrizio Zullo
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Daniele Di Mascio
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Nandini Raghuraman
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, MO
| | - Steve Wagner
- Department of Obstetrics and Gynecology, The Warren Alpert Medical School of Brown University, Providence, RI
| | - Roberto Brunelli
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Antonella Giancotti
- Department of Maternal and Child Health and Urological Sciences, Sapienza University of Rome, Rome, Italy
| | - Hector Mendez-Figueroa
- Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX
| | - Alison G Cahill
- Department of Women's Health, Dell Medical School, The University of Texas at Austin, Austin, TX
| | - Megha Gupta
- Department of Obstetrics and Gynecology, Beth Israel Deaconess Medical Center, Boston, MA
| | - Vincenzo Berghella
- Department of Obstetrics and Gynecology, Sidney Kimmel Medical College of Thomas Jefferson University, Philadelphia, PA
| | - Sean C Blackwell
- Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX
| | - Suneet P Chauhan
- Department of Obstetrics, Gynecology and Reproductive Sciences, McGovern Medical School, The University of Texas Health Science Center at Houston, Houston, TX.
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Rimsza RR, Frolova AI, Kelly JC, Carter EB, Cahill AG, Raghuraman N. Intrapartum electronic fetal monitoring features associated with a clinical diagnosis of nonreassuring fetal status. Am J Obstet Gynecol MFM 2023; 5:101068. [PMID: 37380056 DOI: 10.1016/j.ajogmf.2023.101068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Revised: 06/20/2023] [Accepted: 06/22/2023] [Indexed: 06/30/2023]
Abstract
BACKGROUND Nonreassuring fetal status detected by continuous electronic fetal monitoring accounts for almost 1 in 4 primary cesarean deliveries. However, given the subjective nature of the diagnosis, there is a need to identify the electronic fetal monitoring patterns that are clinically considered nonreassuring. OBJECTIVE This study aimed to describe which electronic fetal monitoring features are most commonly associated with first-stage cesarean delivery for nonreassuring fetal status, and to evaluate the risk of neonatal acidemia following cesarean delivery for nonreassuring fetal status. STUDY DESIGN This was a nested case-control study in a prospectively collected cohort of patients with singleton pregnancies at ≥37 weeks' gestation, admitted in spontaneous labor or for induction of labor from 2010 to 2014 at a single tertiary care center. Patients with preterm pregnancies, multiple gestations, planned cesarean delivery, or nonreassuring fetal status in the second stage of labor were excluded. Cases were identified as having nonreassuring fetal status on the basis of what was documented in the operative note by the delivering physician. Controls were patients without nonreassuring fetal status within 1 hour of delivery. Cases were matched to controls in a 1:2 ratio by parity, obesity, and history of cesarean delivery. Electronic fetal monitoring data were abstracted by credentialed obstetrical research nurses for the 60 minutes before delivery. The primary exposure of interest was the incidence of high-risk category II electronic fetal monitoring features in the 60 minutes before delivery; in particular, the incidence of minimal variability, recurrent late decelerations, recurrent variable decelerations, tachycardia, and >1 prolonged deceleration were compared between groups. We also compared neonatal outcomes between cases and controls, including fetal acidemia (umbilical artery pH <7.1), other umbilical artery gas analytes, and neonatal and maternal outcomes. RESULTS Of the 8580 patients in the parent study, 714 (8.3%) underwent cesarean delivery for nonreassuring fetal status in the first stage of labor. Patients diagnosed with nonreassuring fetal status requiring cesarean delivery were more likely to have recurrent late decelerations, >1 prolonged deceleration, and recurrent variable decelerations compared with controls. More than 1 prolonged deceleration was associated with 6 times increased rate of nonreassuring fetal status diagnosis resulting in cesarean delivery (adjusted odds ratio, 6.73 [95% confidence interval, 2.47-8.33]). Rates of fetal tachycardia were similar between groups. Minimal variability was less common in the nonreassuring fetal status group compared with controls (adjusted odds ratio, 0.36 [95% confidence interval, 0.25-0.54]). Compared with control deliveries, cesarean delivery for nonreassuring fetal status was associated with nearly 7 times higher risk of neonatal acidemia (7.2% vs 1.1%; adjusted odds ratio, 6.93 [95% confidence interval, 3.83-12.54]). Composite neonatal morbidity and composite maternal morbidity were more likely among patients delivered for nonreassuring fetal status in the first stage (3.9% vs 1.1%; adjusted odds ratio, 5.70 [2.60-12.49]; and 13.3% vs 8.0%; adjusted odds ratio, 1.99 [1.41-2.80]). CONCLUSION Although multiple category II electronic fetal monitoring features have been traditionally linked to acidemia, the presence of recurrent late decelerations, recurrent variable decelerations, and prolonged decelerations seemed to concern obstetricians enough to surgically intervene for nonreassuring fetal status. A clinical intrapartum diagnosis of nonreassuring fetal status in the setting of these electronic fetal monitoring features is also associated with increased risk of acidemia, suggesting clinical validity to the diagnosis of nonreassuring fetal status.
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Affiliation(s)
- Rebecca R Rimsza
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, MO (Drs Rimsza, Frolova, Kelly, Carter, and Raghuraman).
| | - Antonina I Frolova
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, MO (Drs Rimsza, Frolova, Kelly, Carter, and Raghuraman)
| | - Jeannie C Kelly
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, MO (Drs Rimsza, Frolova, Kelly, Carter, and Raghuraman)
| | - Ebony B Carter
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, MO (Drs Rimsza, Frolova, Kelly, Carter, and Raghuraman)
| | - Alison G Cahill
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Dell Medical School, The University of Texas at Austin, Austin, TX (Dr Cahill)
| | - Nandini Raghuraman
- Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Washington University in St. Louis, St. Louis, MO (Drs Rimsza, Frolova, Kelly, Carter, and Raghuraman)
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Monitoring uterine contractions during labor: current challenges and future directions. Am J Obstet Gynecol 2023; 228:S1192-S1208. [PMID: 37164493 DOI: 10.1016/j.ajog.2022.10.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 10/22/2022] [Accepted: 10/27/2022] [Indexed: 03/21/2023]
Abstract
Organ-level models are used to describe how cellular and tissue-level contractions coalesce into clinically observable uterine contractions. More importantly, these models provide a framework for evaluating the many different contraction patterns observed in laboring patients, ideally offering insight into the pitfalls of currently available recording modalities and suggesting new directions for improving recording and interpretation of uterine contractions. Early models proposed wave-like propagation of bioelectrical activity as the sole mechanism for recruiting the myometrium to participate in the contraction and increase contraction strength. However, as these models were tested, the results consistently revealed that sequentially propagating waves do not travel long distances and do not encompass the gravid uterus. To resolve this discrepancy, a model using 2 mechanisms, or a "dual model," for organ-level signaling has been proposed. In the dual model, the myometrium is recruited by action potentials that propagate wave-like as far as 10 cm. At longer distances, the myometrium is recruited by a mechanotransduction mechanism that is triggered by rising intrauterine pressure. In this review, we present the influential models of uterine function, highlighting their main features and inconsistencies, and detail the role of intrauterine pressure in signaling and cervical dilation. Clinical correlations demonstrate the application of organ-level models. The potential to improve the recording and clinical interpretation of uterine contractions when evaluating labor is discussed, with emphasis on uterine electromyography. Finally, 7 questions are posed to help guide future investigations on organ-level signaling mechanisms.
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Olofsson P, Ekengård F, Herbst A. Time to reconsider: Have the 2015 FIGO and 2017 Swedish intrapartum cardiotocogram classifications led us from Charybdis to Scylla? Acta Obstet Gynecol Scand 2021; 100:1549-1556. [PMID: 34060661 DOI: 10.1111/aogs.14201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 05/11/2021] [Accepted: 05/25/2021] [Indexed: 11/28/2022]
Abstract
In 2015, FIGO revised the 1987 intrapartum cardiotocography (CTG) classification (FIGO1987). A less radical FIGO2015 version was introduced in Sweden 2017 (SWE2017). Now, post hoc simulation studies show that FIGO2015 and SWE2017 are less reliable than (a modified) FIGO1987. FIGO2015 shows significantly better interobserver agreement for normal CTG traces than FIGO1987, but significantly worse for pathological traces. Agreements between templates are moderate to good, but different classifications of mainly variable decelerations and tachycardia cause significant heterogeneities. FIGO2015 shows insufficient sensitivity to identify fetal acidemia compared with FIGO1987. In connection with fetal electrocardiogram ST analysis, one study showed no template was superior in identifying fetal acidemia, but in a series of only academia, FIGO1987 had significantly higher sensitivity than FIGO2015 (73% vs. 43%) and set of an alarm for fetal acidemia considerably earlier. With SWE2017, operative interventions declined significantly in Sweden but several adverse neonatal outcomes increased significantly. It remains to investigate the development with FIGO2015.
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Affiliation(s)
- Per Olofsson
- Department of Clinical Sciences Malmö, Lund University, Malmö, Sweden.,Cura Mödravård, Malmö, Sweden
| | - Frida Ekengård
- Institution of Clinical Sciences Lund, Lund University, Lund, Sweden.,Department of Obstetrics and Gynecology, Skåne University Hospital, Lund, Malmö, Sweden
| | - Andreas Herbst
- Institution of Clinical Sciences Lund, Lund University, Lund, Sweden.,Department of Obstetrics and Gynecology, Skåne University Hospital, Lund, Malmö, Sweden
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Akyıldız D, Çoban A, Gör Uslu F, Taşpınar A. Effects of Obstetric Interventions During Labor on Birth Process and Newborn Health. FLORENCE NIGHTINGALE JOURNAL OF NURSING 2021; 29:9-21. [PMID: 34263219 PMCID: PMC8137733 DOI: 10.5152/fnjn.2021.19093] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 03/26/2020] [Indexed: 11/25/2022]
Abstract
AIM This study aimed to investigate the effects of the interventions in the delivery room on the delivery process and the newborn health. METHOD The analytical-cross-sectional study was carried out with 354 puerperal women who gave birth in hospital between December 2016 and June 2017 in a public hospital. The data were collected by the data collection form developed by the researchers. Data analysis was done by using descriptive statistics and chi-square test in SPSS 21.00 program. RESULTS The interventions were determined in continuous electro fetal monitoring (80.5%), oxytocin induction (79.9%), restriction of free movement (56.8%), amniotomy (49.7%), enema (44.1%), and movement restriction (56.8%). The intervention period of the second phase of delivery was longer and the rate of cesarean section was higher, and the need for NICU, suction difficulty, 5th APGAR score less than 7, trauma development, difficulty in suction, and higher trauma rates were found in infants. It was determined that the rate of oxygen need in puerperals admitted to the delivery room with cervical dilatation below five cm, vacuum and episiotomy applications in those who underwent amniotomy, and vacuum application rates in those undergoing oxytocin inductions were found to be high. In addition, the rate of fundal compression and episiotomy was significantly higher in patients who used continuous electro fetal monitoring, fundal compression and vacuum rate in patients who were administered analgesic drugs, and episiotomy rates in patients using analgesic drugs. CONCLUSION It has been concluded that interventions in the first phase of labor negatively affect the delivery process and neonatal health and increase the need for intervention in the second phase.
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Affiliation(s)
- Deniz Akyıldız
- Department of Midwifery, Kahramanmaras Sütçü İmam University, Faculty of Health Sciences, Kahramanmaraş, Turkey
| | - Ayden Çoban
- Department of Midwifery, Faculty of Health Sciences, Aydın Adnan Menderes University, Aydın, Turkey
| | | | - Ayten Taşpınar
- Department of Midwifery, Faculty of Health Sciences, Aydın Adnan Menderes University, Aydın, Turkey
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An Efficient and Robust Deep Learning Method with 1-D Octave Convolution to Extract Fetal Electrocardiogram. SENSORS 2020; 20:s20133757. [PMID: 32635568 PMCID: PMC7374297 DOI: 10.3390/s20133757] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/30/2020] [Accepted: 07/01/2020] [Indexed: 11/17/2022]
Abstract
The invasive method of fetal electrocardiogram (fECG) monitoring is widely used with electrodes directly attached to the fetal scalp. There are potential risks such as infection and, thus, it is usually carried out during labor in rare cases. Recent advances in electronics and technologies have enabled fECG monitoring from the early stages of pregnancy through fECG extraction from the combined fetal/maternal ECG (f/mECG) signal recorded non-invasively in the abdominal area of the mother. However, cumbersome algorithms that require the reference maternal ECG as well as heavy feature crafting makes out-of-clinics fECG monitoring in daily life not yet feasible. To address these challenges, we proposed a pure end-to-end deep learning model to detect fetal QRS complexes (i.e., the main spikes observed on a fetal ECG waveform). Additionally, the model has the residual network (ResNet) architecture that adopts the novel 1-D octave convolution (OctConv) for learning multiple temporal frequency features, which in turn reduce memory and computational cost. Importantly, the model is capable of highlighting the contribution of regions that are more prominent for the detection. To evaluate our approach, data from the PhysioNet 2013 Challenge with labeled QRS complex annotations were used in the original form, and the data were then modified with Gaussian and motion noise, mimicking real-world scenarios. The model can achieve a F1 score of 91.1% while being able to save more than 50% computing cost with less than 2% performance degradation, demonstrating the effectiveness of our method.
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Abstract
PURPOSE Reducing primary cesarean births is a national priority in the United States. Recommendations include delaying admission of low-risk pregnant women to the hospital until they are in active labor, considered to be 6 cm cervical dilatation. How this recommendation affects decision-making during triage requires further exploration. The purpose of this study was to explore the clinician's perspective on the triage process and deferral of hospital admission for low-risk pregnant women who were not yet in active labor. METHODS A qualitative descriptive approach was used via semistructured interviews with physicians, midwives, and nurses. Data analysis used an inductive approach and identified codes, a theme and subthemes. RESULTS Twenty-five clinicians participated. A triad of decision-making occurred between three main stakeholders: the low-risk pregnant woman, the triage nurse, and the physician or midwife. One theme and four subthemes related to this triad were identified. The theme Admission of Low-Risk Pregnant Women Depends on Many Factors provides context to the maternity care triage process. There are many factors clinicians consider prior to admitting women, including situational and clinical factors. Subthemes related to the woman are her expectation and knowledge about birth and her ability to cope with labor. Subthemes associated with the provider and triage nurse are care variation and concern for maternal and fetal safety. CLINICAL IMPLICATIONS From the clinician's perspective, triage is a complex, dynamic process, even for low-risk pregnant women. There is an interplay of different factors affecting clinical decision-making, thus the decision-making triad provides a possible framework for shared decision-making.
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Abstract
Electronic fetal monitoring (EFM) is the most commonly used tool to screen for intrapartum fetal hypoxia. Category II EFM is present in over 80% of laboring patients and poses a unique challenge to management given the breadth of EFM features that fall within this category. Certain Category II patterns, such as recurrent late or recurrent variable decelerations, are more predictive of neonatal acidemia than others. A key feature among many published algorithms for Category II management is the use of intrauterine fetal resuscitation techniques including maternal oxygen administration, amnioinfusion, intravenous fluid bolus, discontinuation of oxytocin, and tocolytic administration. The goal of intrauterine resuscitation is to prevent or reverse fetal hypoxia. This is most likely to be successful if the etiology of the Category II EFM pattern is identified and targeted resuscitative measures are performed.
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Affiliation(s)
- Nandini Raghuraman
- Department of Obstetrics and Gynecology, Washington University School of Medicine in St Louis, Center for Outpatient Health, 10th floor, 4901 Forest Park Ave, St Louis, MO 63110, United States.
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Hamelmann P, Vullings R, Kolen AF, Bergmans JWM, van Laar JOEH, Tortoli P, Mischi M. Doppler Ultrasound Technology for Fetal Heart Rate Monitoring: A Review. IEEE TRANSACTIONS ON ULTRASONICS, FERROELECTRICS, AND FREQUENCY CONTROL 2020; 67:226-238. [PMID: 31562079 DOI: 10.1109/tuffc.2019.2943626] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Fetal well-being is commonly assessed by monitoring the fetal heart rate (fHR). In clinical practice, the de facto standard technology for fHR monitoring is based on the Doppler ultrasound (US). Continuous monitoring of the fHR before and during labor is performed using a US transducer fixed on the maternal abdomen. The continuous fHR monitoring, together with simultaneous monitoring of the uterine activity, is referred to as cardiotocography (CTG). In contrast, for intermittent measurements of the fHR, a handheld Doppler US transducer is typically used. In this article, the technology of Doppler US for continuous fHR monitoring and intermittent fHR measurements is described, with emphasis on fHR monitoring for CTG. Special attention is dedicated to the measurement environment, which includes the clinical setting in which fHR monitoring is commonly performed. In addition, to understand the signal content of acquired Doppler US signals, the anatomy and physiology of the fetal heart and the surrounding maternal abdomen are described. The challenges encountered in these measurements have led to different technological strategies, which are presented and critically discussed, with a focus on the US transducer geometry, Doppler signal processing, and fHR extraction methods.
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Amer-Wåhlin I, Ugwumadu A, Yli BM, Kwee A, Timonen S, Cole V, Ayres-de-Campos D, Roth GE, Schwarz C, Ramenghi LA, Todros T, Ehlinger V, Vayssiere C. Fetal electrocardiography ST-segment analysis for intrapartum monitoring: a critical appraisal of conflicting evidence and a way forward. Am J Obstet Gynecol 2019; 221:577-601.e11. [PMID: 30980794 DOI: 10.1016/j.ajog.2019.04.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 03/31/2019] [Accepted: 04/01/2019] [Indexed: 10/27/2022]
Abstract
BACKGROUND In the past century, some areas of obstetric including intrapartum care have been slow to benefit from the dramatic advances in technology and medical care. Although fetal heart rate monitoring (cardiotocography) became available a half century ago, its interpretation often differs between institutions and countries, its diagnostic accuracy needs improvement, and a technology to help reduce the unnecessary obstetric interventions that have accompanied the cardiotocography is urgently needed. STUDY DESIGN During the second half of the 20th century, key findings in animal experiments captured the close relationship between myocardial glycogenolysis, myocardial workload, and ST changes, thus demonstrating that ST waveform analysis of the fetal electrocardiogram can provide information on oxygenation of the fetal myocardium and establishing the physiological basis for the use of electrocardiogram in intrapartum fetal surveillance. RESULTS Six randomized controlled trials, 10 meta-analyses, and more than 20 observational studies have evaluated the technology developed based on this principle. Nonetheless, despite this intensive assessment, differences in study protocols, inclusion criteria, enrollment rates, clinical guidelines, use of fetal blood sampling, and definitions of key outcome parameters, as well as inconsistencies in randomized controlled trial data handling and statistical methodology, have made this voluminous evidence difficult to interpret. Enormous resources spent on randomized controlled trials have failed to guarantee the generalizability of their results to other settings or their ability to reflect everyday clinical practice. CONCLUSION The latest meta-analysis used revised data from primary randomized controlled trials and data from the largest randomized controlled trials from the United States to demonstrate a significant reduction of metabolic acidosis rates by 36% (odds ratio, 0.64; 95% confidence interval, 0.46-0.88) and operative vaginal delivery rates by 8% (relative risk, 0.92; 95% confidence interval, 0.86-0.99), compared with cardiotocography alone.
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Significant reduction in umbilical artery metabolic acidosis after implementation of intrapartum ST waveform analysis of the fetal electrocardiogram. Am J Obstet Gynecol 2019; 221:63.e1-63.e13. [PMID: 30826340 DOI: 10.1016/j.ajog.2019.02.049] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Revised: 01/17/2019] [Accepted: 02/22/2019] [Indexed: 11/24/2022]
Abstract
BACKGROUND Although the evidence regarding the benefit of using ST waveform analysis of the fetal electrocardiogram is conflicting, ST waveform analysis is considered as adjunct to identify fetuses at risk for asphyxia in our center. Most randomized controlled trials and meta-analyses have not shown a significant decrease in umbilical metabolic acidosis, while some observational studies have shown a gradual decrease of this outcome over a longer period of time. Observational studies can give more insight into the effect of implementation of the ST technology in daily clinical practice. OBJECTIVE To evaluate the change in frequency of perinatal intervention and adverse neonatal outcome after the implementation of ST waveform analysis of the fetal electrocardiogram from 2000 to 2013. STUDY DESIGN This retrospective longitudinal study was conducted in a tertiary referral center. A total of 19,664 medium- and high-risk singleton pregnancies with fetuses in cephalic presentation, a gestational age of ≥36 weeks, and the intention to deliver vaginally were included. ST waveform analysis of the fetal electrocardiogram was implemented in the year 2000 and by 2010 all deliveries were monitored using this technology. Data were collected on the following perinatal outcomes: fetal blood sampling, mode of delivery, umbilical cord blood gases, Apgar scores, neonatal encephalopathy, and perinatal death. Longitudinal trend analysis was used to detect changes over time in all deliveries monitored by cardiotocography either alone or in adjunct to ST waveform analysis of the fetal electrocardiogram. Logistic regression was used to correct for possible confounders. RESULTS The umbilical artery metabolic acidosis rate declined from 2.5% (average rate of 2000 + 2001 + 2002) to 0.4% (average of 2011 + 2012 + 2013) (P < .001), which represents an 84% decrease. This decrease largely occurred between 2006 and 2008, during the Dutch randomized trial on fetal electrocardiogram ST waveform analysis. At this time, approximately 20% of deliveries were monitored using this method. Furthermore, there were significant reductions in fetal blood sampling rate (P < .001). Overall cesarean and vaginal instrumental deliveries decreased significantly (P < .001), but not for fetal distress. There were no changes in the Apgar scores. The incidence of neonatal encephalopathy was significantly lower in the second part of the study (odds ratio 0.39, 95% confidence interval 0.17-0.89). CONCLUSION There was an 84% decrease in the incidence of umbilical artery metabolic acidosis in all deliveries between 2000 and 2013. The neonatal encephalopathy rate, fetal blood sampling rate, and the total number of cesarean and vaginal instrumental deliveries also decreased.
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Thellesen L, Bergholt T, Sorensen JL, Rosthoej S, Hvidman L, Eskenazi B, Hedegaard M. The impact of a national cardiotocography education program on neonatal and maternal outcomes: A historical cohort study. Acta Obstet Gynecol Scand 2019; 98:1258-1267. [PMID: 31140581 DOI: 10.1111/aogs.13666] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 05/16/2019] [Accepted: 05/20/2019] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Studies indicate an association between errors in cardiotocography (CTG) management and hypoxic brain injuries among newborns. Continuing professional education is recommended. We aimed to examine whether the implementation of a national interprofessional CTG education program in Denmark was associated with a decrease in risk of fetal hypoxia measured by umbilical cord pH < 7.00, 5-minute Apgar score <7 or neonatal therapeutic hypothermia. As a secondary aim, we assessed whether the educational intervention was associated with an increase in operative deliveries. MATERIAL AND METHODS We conducted a historical cohort study from 2009 to 2015 including all intended vaginal deliveries with liveborn singletons in cephalic presentation and gestational age ≥37 weeks. Data were retrieved from the Medical Birth Register and the National Patient Register. The study period was divided in three: pre-implementation (2009-2012), implementation (2013) and post-implementation (2014-2015). Using logistic regression we estimated odds ratios (OR) of fetal hypoxia outcomes using the pre-implementation period as reference. Analyses were adjusted for potential maternal, neonatal and delivery-associated confounders. Missing data were accounted for by multiple imputation. RESULTS In all, 331 282 deliveries were included. Overall risks of pH < 7.00, Apgar score <7 and therapeutic hypothermia were respectively 0.45%, 0.58% and 0.06%. Adjusted OR in the post-implementation period were 1.12 (95% confidence interval [CI] 1.00-1.26), 0.99 (95% CI 0.90-1.10) and 1.34 (95% CI 0.99-1.82) for the three outcomes, respectively. The pH missingness equaled 12.4%. Odds of emergency cesarean section was unaltered, whereas the odds of assisted vaginal delivery decreased by 14% (0.86, 95% CI 0.84-0.89). CONCLUSIONS Healthcare professionals are considered the weakest link of CTG technology. We did not find that increasing healthcare professionals' CTG interpretation skills affected the risk of fetal hypoxia. Missing data for pH values were substantial and represent a limitation of the study. We cannot with certainty rule out that missingness masked a true effect of the intervention. Our study indicates that assisted vaginal deliveries can be decreased without an increased risk of fetal hypoxia. Dilution of effect in a complex clinical setting, rare outcomes, insufficient intervention and a possible overestimation of the impact of errors in CTG management might explain the lack of effect.
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Affiliation(s)
- Line Thellesen
- Department of Obstetrics, The Juliane Marie Center for Children, Women, and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Bergholt
- Department of Obstetrics, The Juliane Marie Center for Children, Women, and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Jette Led Sorensen
- Department of Obstetrics, The Juliane Marie Center for Children, Women, and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Susanne Rosthoej
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Lone Hvidman
- Department of Obstetrics and Gynecology, Aarhus University Hospital, Aarhus, Denmark
| | - Brenda Eskenazi
- Center for Environmental Research and Children's Health (CERCH), School of Public Health, University of California, Berkeley, CA, USA
| | - Morten Hedegaard
- Department of Obstetrics, The Juliane Marie Center for Children, Women, and Reproduction, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
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Cheyney M, Bovbjerg ML, Leeman L, Vedam S. Community Versus Out-of-Hospital Birth: What's in a Name? J Midwifery Womens Health 2019; 64:9-11. [DOI: 10.1111/jmwh.12947] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 12/04/2018] [Accepted: 12/07/2018] [Indexed: 01/21/2023]
Affiliation(s)
- Melissa Cheyney
- Department of Anthropology; Oregon State University; Corvallis Oregon
| | - Marit L. Bovbjerg
- Epidemiology Program, College of Public Health & Human Sciences; Oregon State University; Corvallis Oregon
| | - Lawrence Leeman
- Department of Family and Community Medicine and Department of Obstetrics and Gynecology; University of New Mexico School of Medicine; Albuquerque New Mexico
| | - Saraswathi Vedam
- Division of Midwifery, Department of Family Practice; University of British Columbia; Vancouver British Columbia
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Chauhan SP, Weiner SJ, Saade GR, Belfort MA, Reddy UM, Thorp JM, Tita ATN, Miller RS, Dinsmoor MJ, McKenna DS, Stetzer B, Rouse DJ, Gibbs RS, El-Sayed YY, Sorokin Y, Caritis SN. Intrapartum Fetal Heart Rate Tracing Among Small-for-Gestational Age Compared With Appropriate-for-Gestational-Age Neonates. Obstet Gynecol 2018; 132:1019-1025. [PMID: 30204687 PMCID: PMC6247114 DOI: 10.1097/aog.0000000000002855] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To compare fetal heart rate (FHR) patterns during the last hour of labor between small-for-gestational-age (SGA; birth weight less than the 10th percentile for gestational age) and appropriate-for-gestational-age (AGA; birth weight at the 10-90th percentile) neonates at 36 weeks of gestation or greater. We also compared the rate of cesarean delivery and composite neonatal morbidity among SGA and AGA newborns. METHODS This is a secondary analysis of a randomized trial of intrapartum fetal electrocardiographic ST-segment analysis. We excluded women with chorioamnionitis, insufficient duration of FHR tracing in the hour before delivery, and anomalous newborns. Fetal heart rate patterns were categorized by computerized pattern recognition software (PeriCALM Patterns). Composite neonatal morbidity was defined as any of the following: intrapartum fetal death, Apgar score 3 or less at 5 minutes, cord artery pH 7.05 or less, base deficit 12 mmol/L or greater, neonatal seizure, intubation at delivery, neonatal encephalopathy, and neonatal death. Logistic regression was used to evaluate the association between FHR patterns and SGA adjusted for magnesium sulfate exposure and stage of labor. RESULTS Of the 11,108 women randomized, 85% (n=9,402) met inclusion criteria, of whom 9% were SGA. In the last hour, the likelihood of accelerations was significantly lower among SGA than AGA neonates (72.4% vs 66.8%; P=.001). Variable decelerations lasting greater than 60 seconds, with depth greater than 60 beats per minute (bpm) or nadir less than 60 bpm, were significantly more common with SGA than AGA (all P<.001). The rate of late decelerations, prolonged decelerations, or bradycardia were similar between SGA and AGA (all P>.05). Cesarean delivery for fetal indications was significantly more common with SGA (7.0%) than AGA (4.0%; P<.001). The composite neonatal morbidity was 1.4% among SGA and 1.0% among AGA (odds ratio 1.40, 95% CI 0.74-2.64). CONCLUSION Although the FHR patterns in the last hour of labor differ among SGA and AGA neonates, as does the rate of cesarean delivery, the composite neonatal morbidity was similar.
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Affiliation(s)
- Suneet P Chauhan
- Departments of Obstetrics and Gynecology, University of Texas Health Science Center at Houston, McGovern Medical School-Children's Memorial Hermann Hospital, Houston, Texas; University of Texas Medical Branch, Galveston, Texas; University of Utah Health Sciences Center, Salt Lake City, Utah; University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; University of Alabama at Birmingham, Birmingham, Alabama; Columbia University, New York, New York; Northwestern University, Chicago, Illinois; The Ohio State University, Columbus, Ohio; MetroHealth Medical Center-Case Western Reserve University, Cleveland, Ohio; Brown University, Providence, Rhode Island; University of Colorado School of Medicine, Anschutz Medical Campus, Aurora, Colorado; Stanford University, Stanford, California; Wayne State University, Detroit, Michigan; and University of Pittsburgh, Pittsburgh, Pennsylvania; the George Washington University Biostatistics Center, Washington, DC; and the Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, Maryland
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Raghuraman N, Cahill AG. Update on Fetal Monitoring: Overview of Approaches and Management of Category II Tracings. Obstet Gynecol Clin North Am 2018; 44:615-624. [PMID: 29078943 DOI: 10.1016/j.ogc.2017.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Electronic fetal monitoring (EFM) is widely used to assess fetal status in labor. Use of intrapartum continuous EFM is associated with a lower risk of neonatal seizures but a higher risk of cesarean or operative delivery. Category II fetal heart tracings (FHTs) are indeterminate in their ability to predict fetal acidemia. Certain patterns of decelerations and variability within this category may be predictive of neonatal morbidity. Adjunct tests of fetal well-being can be used during labor to further triage patients. Intrauterine resuscitation techniques should target the suspected etiology of intrapartum fetal hypoxia. Clinical factors play a role in the interpretation of EFM.
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Affiliation(s)
- Nandini Raghuraman
- Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Washington University School of Medicine in St. Louis, 660 South Euclid Avenue, Maternity Building, 5th Floor, St Louis, MO 63110, USA.
| | - Alison G Cahill
- Department of Obstetrics and Gynecology, Division of Maternal-Fetal Medicine, Washington University School of Medicine in St. Louis, 660 South Euclid Avenue, Maternity Building, 5th Floor, St Louis, MO 63110, USA
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Timonen S, Holmberg K. The importance of the learning process in ST analysis interpretation and its impact in improving clinical and neonatal outcomes. Am J Obstet Gynecol 2018; 218:620.e1-620.e7. [PMID: 29577914 DOI: 10.1016/j.ajog.2018.03.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 03/06/2018] [Accepted: 03/16/2018] [Indexed: 11/24/2022]
Abstract
BACKGROUND Intrapartum fetal heart rate monitoring was introduced with the goal to reduce fetal hypoxia and deaths. However, continuous fetal heart rate monitoring has been shown to have a high sensitivity but also a high false-positive rate. To improve specificity, adjunctive technologies have been developed to identify fetuses at risk for intrapartum asphyxia. Intensive research on the value of ST-segment analysis of the fetal electrocardiogram as an adjunct to standard electronic fetal monitoring in lowering the rates of fetal metabolic acidosis and operative deliveries has been ongoing. The conflicting results in randomized and observational studies may partly be due to differences in study design. OBJECTIVE This study aims to determine the significance of the learning process for the introduction of ST analysis into clinical practice and its impact on initial and subsequent obstetric outcomes. STUDY DESIGN This was a prospective observational study with the primary objective to evaluate the importance of the learning period on the rates of metabolic acidosis and operative deliveries after the implementation of ST analysis. The study was conducted at the Turku University Hospital, Turku, Finland, with 3400-4200 annual deliveries. The whole study population consisted of all 42,146 deliveries during the study period 2001 through 2011. The ST analysis usage rate was 18%. The data were collected prospectively from labors monitored with ST analysis as an adjunct to conventional intrapartum fetal heart rate monitoring. Primary endpoints were the rates of metabolic acidosis (cord artery pH <7.05 and an extracellular fluid compartment base deficit >12.0 mmol/L), fetal scalp blood sampling, and operative deliveries. Comparisons of these outcomes were made between the initiation period (the first 2 years) and the subsequent usage period (the next 9 years). RESULTS In the whole study population the prevalence of cord pH <7.05 decreased from 1.5-0.81% (relative risk, 0.54; 95% confidence interval, 0.43-0.67), the rate of cesarean deliveries from 17.2-14.1% (relative risk, 0.82; 95% confidence interval, 0.89-0.97), and the rate of fetal scalp blood sampling from 1.75-0.82% (relative risk, 0.47; 95% confidence interval, 0.38-0.58) when the 2 study periods were compared. In the ST analysis group, the frequency of cord metabolic acidosis rate was reduced from 1.0-0.25% (relative risk, 0.33; 95% confidence interval, 0.15-0.72). CONCLUSION We provide evidence that the results improve over time and there is a learning curve in the introduction of the ST analysis method. This was demonstrated by the lower rates of metabolic acidosis and operative deliveries after the initial implementation period.
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Cahill AG, Tuuli MG, Stout MJ, López JD, Macones GA. A prospective cohort study of fetal heart rate monitoring: deceleration area is predictive of fetal acidemia. Am J Obstet Gynecol 2018; 218:523.e1-523.e12. [PMID: 29408586 PMCID: PMC5916338 DOI: 10.1016/j.ajog.2018.01.026] [Citation(s) in RCA: 90] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 01/12/2018] [Accepted: 01/22/2018] [Indexed: 11/24/2022]
Abstract
BACKGROUND Intrapartum electronic fetal monitoring is the most commonly used tool in obstetrics in the United States; however, which electronic fetal monitoring patterns predict acidemia remains unclear. OBJECTIVE This study was designed to describe the frequency of patterns seen in labor using modern nomenclature, and to test the hypothesis that visually interpreted patterns are associated with acidemia and morbidities in term infants. We further identified patterns prior to delivery, alone or in combination, predictive of acidemia and neonatal morbidity. STUDY DESIGN This was a prospective cohort study of 8580 women from 2010 through 2015. Patients were all consecutive women laboring at ≥37 weeks' gestation with a singleton cephalic fetus. Electronic fetal monitoring patterns during the 120 minutes prior to delivery were interpreted in 10-minute epochs. Interpretation included the category system and individual electronic fetal monitoring patterns per the Eunice Kennedy Shriver National Institute of Child Health and Human Development criteria as well as novel patterns. The primary outcome was fetal acidemia (umbilical artery pH ≤7.10); neonatal morbidities were also assessed. Final regression models for acidemia adjusted for nulliparity, pregestational diabetes, and advanced maternal age. Area under the receiver operating characteristic curves were used to assess the test characteristics of individual models for acidemia and neonatal morbidity. RESULTS Of 8580 women, 149 (1.7%) delivered acidemic infants. Composite neonatal morbidity was diagnosed in 757 (8.8%) neonates within the total cohort. Persistent category I, and 10-minute period of category III, were significantly associated with normal pH and acidemia, respectively. Total deceleration area was most discriminative of acidemia (area under the receiver operating characteristic curves, 0.76; 95% confidence interval, 0.72-0.80), and deceleration area with any 10 minutes of tachycardia had the greatest discriminative ability for neonatal morbidity (area under the receiver operating characteristic curves, 0.77; 95% confidence interval, 0.75-0.79). Once the threshold of deceleration area is reached the number of cesareans needed-to-be performed to potentially prevent 1 case of acidemia and morbidity is 5 and 6, respectively. CONCLUSION Deceleration area is the most predictive electronic fetal monitoring pattern for acidemia, and combined with tachycardia for significant risk of morbidity, from the electronic fetal monitoring patterns studied. It is important to acknowledge that this study was performed in patients delivering ≥37 weeks, which may limit the generalizability to preterm populations. We also did not use computerized analysis of the electronic fetal monitoring patterns because human visual interpretation was the basis for the Eunice Kennedy Shriver National Institute of Child Health and Human Development categories, and importantly, it is how electronic fetal monitoring is used clinically.
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Affiliation(s)
- Alison G Cahill
- Department of Obstetrics and Gynecology, Washington University in St Louis, St Louis, MO.
| | - Methodius G Tuuli
- Department of Obstetrics and Gynecology, Washington University in St Louis, St Louis, MO
| | - Molly J Stout
- Department of Obstetrics and Gynecology, Washington University in St Louis, St Louis, MO
| | - Julia D López
- Department of Obstetrics and Gynecology, Washington University in St Louis, St Louis, MO
| | - George A Macones
- Department of Obstetrics and Gynecology, Washington University in St Louis, St Louis, MO
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Linear Phase Sharp Transition BPF to Detect Noninvasive Maternal and Fetal Heart Rate. JOURNAL OF HEALTHCARE ENGINEERING 2018; 2018:5485728. [PMID: 29796231 PMCID: PMC5896252 DOI: 10.1155/2018/5485728] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 01/21/2018] [Indexed: 11/17/2022]
Abstract
Fetal heart rate (FHR) detection can be monitored using either direct fetal scalp electrode recording (invasive) or by indirect noninvasive technique. Weeks before delivery, the invasive method poses a risk factor to the fetus, while the latter provides accurate fetal ECG (FECG) information which can help diagnose fetal's well-being. Our technique employs variable order linear phase sharp transition (LPST) FIR band-pass filter which shows improved stopband attenuation at higher filter orders. The fetal frequency fiduciary edges form the band edges of the filter characterized by varying amounts of overlap of maternal ECG (MECG) spectrum. The one with the minimum maternal spectrum overlap was found to be optimum with no power line interference and maximum fetal heart beats being detected. The improved filtering is reflected in the enhancement of the performance of the fetal QRS detector (FQRS). The improvement has also occurred in fetal heart rate obtained using our algorithm which is in close agreement with the true reference (i.e., invasive fetal scalp ECG). The performance parameters of the FQRS detector such as sensitivity (Se), positive predictive value (PPV), and accuracy (F1) were found to improve even for lower filter order. The same technique was extended to evaluate maternal QRS detector (MQRS) and found to yield satisfactory maternal heart rate (MHR) results.
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Brocato B, Lewis D, Mulekar M, Baker S. Obesity’s impact on intrapartum electronic fetal monitoring. J Matern Fetal Neonatal Med 2017; 32:92-94. [DOI: 10.1080/14767058.2017.1371696] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Brian Brocato
- Department of Obstetrics and Gynecology, University of South Alabama, Mobile, AL, USA
| | - David Lewis
- Department of Obstetrics and Gynecology, Louisiana State University – Shreveport, Shreveport, LA, USA
| | - Madhuri Mulekar
- Department of Mathematics and Statistics, University of South Alabama, Mobile, AL, USA
| | - Susan Baker
- Department of Obstetrics and Gynecology, University of South Alabama, Mobile, AL, USA
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Thellesen L, Sorensen JL, Hedegaard M, Rosthoej S, Colov NP, Andersen KS, Bergholt T. Cardiotocography interpretation skills and the association with size of maternity unit, years of obstetric work experience and healthcare professional background: a national cross-sectional study. Acta Obstet Gynecol Scand 2017; 96:1075-1083. [PMID: 28524258 DOI: 10.1111/aogs.13171] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2016] [Accepted: 05/09/2017] [Indexed: 11/30/2022]
Abstract
INTRODUCTION We aimed to examine whether cardiotocography (CTG) knowledge, interpretation skills and decision-making measured by a written assessment were associated with size of maternity unit, years of obstetric work experience and healthcare professional background. MATERIAL AND METHODS A national cross-sectional study in the setting of a CTG teaching intervention involving all 24 maternity units in Denmark. Participants were midwives (n = 1260) and specialists (n = 269) and residents (n = 142) in obstetrics and gynecology who attended a 1-day CTG course and answered a 30-item multiple-choice question test. Associations between mean test score and work conditions were analyzed using multivariable robust regression, in which the three variables were mutually adjusted. RESULTS Participants from units with > 3000 deliveries/year scored higher on the test than participants from units with < 1000 deliveries/year (3000-3999 deliveries/year: mean difference 0.8, p < 0.0001; > 4000 deliveries/year: mean difference 0.5, p = 0.006). Participants with < 15 years of work experience scored higher than participants with > 15 years of experience (15-20 years of experience: mean difference - 0.6, p = 0.007; > 20 years experience: mean difference - 0.9, p < 0.0001). No differences were detected concerning professional background. CONCLUSIONS CTG knowledge, interpretation skills and decision-making measured by a written assessment were positively associated with working in large maternity units and having < 15 years of obstetric work experience. This might indicate a challenge in maintaining CTG skills in small units and among experienced staff but could also reflect different levels of motivation, test familiarity and learning culture. Whether the findings are transferable to the clinical setting was not examined.
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Affiliation(s)
- Line Thellesen
- Department of Obstetrics, Juliane Marie Center for Children, Women and Reproduction, Rigshospitalet University Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Jette L Sorensen
- Department of Obstetrics, Juliane Marie Center for Children, Women and Reproduction, Rigshospitalet University Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Morten Hedegaard
- Department of Obstetrics, Juliane Marie Center for Children, Women and Reproduction, Rigshospitalet University Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Susanne Rosthoej
- Section of Biostatistics, Department of Public Health, University of Copenhagen, Copenhagen, Denmark
| | - Nina P Colov
- Department of Obstetrics, Juliane Marie Center for Children, Women and Reproduction, Rigshospitalet University Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Kristine S Andersen
- Department of Obstetrics, Juliane Marie Center for Children, Women and Reproduction, Rigshospitalet University Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Bergholt
- Department of Obstetrics, Juliane Marie Center for Children, Women and Reproduction, Rigshospitalet University Hospital, University of Copenhagen, Copenhagen, Denmark
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Martinek R, Nedoma J, Fajkus M, Kahankova R, Konecny J, Janku P, Kepak S, Bilik P, Nazeran H. A Phonocardiographic-Based Fiber-Optic Sensor and Adaptive Filtering System for Noninvasive Continuous Fetal Heart Rate Monitoring. SENSORS 2017; 17:s17040890. [PMID: 28420215 PMCID: PMC5426540 DOI: 10.3390/s17040890] [Citation(s) in RCA: 63] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/05/2017] [Revised: 03/28/2017] [Accepted: 04/12/2017] [Indexed: 11/21/2022]
Abstract
This paper focuses on the design, realization, and verification of a novel phonocardiographic- based fiber-optic sensor and adaptive signal processing system for noninvasive continuous fetal heart rate (fHR) monitoring. Our proposed system utilizes two Mach-Zehnder interferometeric sensors. Based on the analysis of real measurement data, we developed a simplified dynamic model for the generation and distribution of heart sounds throughout the human body. Building on this signal model, we then designed, implemented, and verified our adaptive signal processing system by implementing two stochastic gradient-based algorithms: the Least Mean Square Algorithm (LMS), and the Normalized Least Mean Square (NLMS) Algorithm. With this system we were able to extract the fHR information from high quality fetal phonocardiograms (fPCGs), filtered from abdominal maternal phonocardiograms (mPCGs) by performing fPCG signal peak detection. Common signal processing methods such as linear filtering, signal subtraction, and others could not be used for this purpose as fPCG and mPCG signals share overlapping frequency spectra. The performance of the adaptive system was evaluated by using both qualitative (gynecological studies) and quantitative measures such as: Signal-to-Noise Ratio—SNR, Root Mean Square Error—RMSE, Sensitivity—S+, and Positive Predictive Value—PPV.
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Affiliation(s)
- Radek Martinek
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Jan Nedoma
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Marcel Fajkus
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Radana Kahankova
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Jaromir Konecny
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Petr Janku
- Department of Obstetrics and Gynecology, Masaryk University and University Hospital Brno, Jihlavska 20, 625 00 Brno, Czech Republic.
| | - Stanislav Kepak
- Department of Telecommunications, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Petr Bilik
- Department of Cybernetics and Biomedical Engineering, Faculty of Electrical Engineering and Computer Science, VSB-Technical University of Ostrava, 17 Listopadu 15, Ostrava 70833, Czech Republic.
| | - Homer Nazeran
- Department of Electrical and Computer Engineering, University of Texas El Paso, 500 W University Ave, El Paso, TX 79968, USA.
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Paterno MT, McElroy K, Regan M. Electronic Fetal Monitoring and Cesarean Birth: A Scoping Review. Birth 2016; 43:277-284. [PMID: 27565450 DOI: 10.1111/birt.12247] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/19/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND In many United States hospitals, electronic fetal monitoring (EFM) is used continuously during labor for all patients regardless of risk status. Application of EFM, particularly at labor admission, may trigger a chain of interventions resulting in increased risk for cesarean birth among low-risk women. The goal of this review was to summarize evidence on use of EFM during low-risk labors and identify gaps in research. METHODS We conducted a scoping review of studies published in English since 1996 that addressed the relationship between EFM use and cesarean among low-risk women. We screened 57 full-text articles for appropriateness. Seven articles were included in the final review. RESULTS The largest study demonstrated an 81 percent increased risk of primary cesarean birth when EFM was used in labor, but did not differentiate between high- and low-risk pregnancies. Four randomized controlled trials examined the association of admission EFM with obstetric outcomes; only one considered cesarean birth as a primary outcome and found a 23 percent increase in operative birth when EFM lasted more than 1 hour. A study examining application of continuous EFM before and after 4 centimeters dilatation found no differences between groups. CONCLUSIONS In general, the research on this topic suggests an association between the use of EFM and cesarean birth; however, more well-designed studies are needed to examine benefits of EFM versus auscultation, determine if EFM is associated with use of other technologies that could cumulatively increase risk of cesarean birth, and understand provider motivation to use EFM over auscultation.
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Affiliation(s)
| | | | - Mary Regan
- University of Maryland's School of Nursing, Baltimore, MD, USA
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Nelson KB, Sartwelle TP, Rouse DJ. Electronic fetal monitoring, cerebral palsy, and caesarean section: assumptions versus evidence. BMJ 2016; 355:i6405. [PMID: 27908902 PMCID: PMC6883481 DOI: 10.1136/bmj.i6405] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Karin B Nelson
- National Institute of Neurological Disorders and Stroke, Bethesda, MD, 20892, USA
| | | | - Dwight J Rouse
- Women and Infants' Hospital of Rhode Island and Brown University, Providence, RI, USA
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Toivonen E, Palomäki O, Huhtala H, Uotila J. Cardiotocography in breech versus vertex delivery: an examiner-blinded, cross-sectional nested case-control study. BMC Pregnancy Childbirth 2016; 16:319. [PMID: 27769196 PMCID: PMC5073907 DOI: 10.1186/s12884-016-1115-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2015] [Accepted: 10/14/2016] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND The safety of vaginal breech delivery has been debated for decades. Although it has been shown to predispose infants to immediate depression, several observational studies have also shown that attempting vaginal breech delivery does not increase perinatal morbidity or low Apgar score at the age of five minutes. Cardiotocography monitoring is recommended during vaginal breech delivery, but comparative data describing differences between cardiotocography tracings in breech and vertex deliveries is scarce. This study aims to evaluate differences in intrapartum cardiotocography tracings between breech and vertex deliveries in the final 60 min of delivery. A secondary goal is to identify risk factors for suboptimal neonatal outcome in the study population. METHODS One hundred eight breech and 108 vertex singleton, intended vaginal deliveries at term from a tertiary hospital with 5000 annual deliveries were included. Two experienced obstetricians, blinded to fetal presentation, neonatal outcome and actual mode of delivery, evaluated traces recorded 60 min before delivery. They provided a three-tier classification and evaluated different trace features according to FIGO (1987) guidelines. Factors associated with acidemia and low Apgar scores were identified by univariate and multivariable analyses performed with binary logistic regression. Student's T-test and chi-square test were used, as appropriate. RESULTS Late decelerations were seen in 13.9 % of breech and 2.8 % of vertex deliveries (p = 0.003) and decreased variability in 26.9 % of breech and 8.3 % of vertex deliveries (p < 0.001). In multivariable analysis complicated variable decelerations and breech presentation were identified as risk factors for neonatal acidemia and low Apgar score at the age of five minutes. Pathological trace and breech presentation were independent risk factors for low Apgar score at the age of one minute. CONCLUSIONS Decreased variability and late decelerations were more prevalent in breech compared to vertex deliveries. Pathological trace predicts immediate neonatal depression and especially complicated variable decelerations may signal more severe distress. Further research is needed to create guidelines for safe management of vaginal breech delivery.
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Affiliation(s)
- Elli Toivonen
- School of Medicine, University of Tampere, 33014 Tampere, Finland
| | - Outi Palomäki
- Department of Obstetrics and Gynecology, Tampere University Hospital, PL 2000, 33521 Tampere, Finland
| | - Heini Huhtala
- School of Health Sciences, University of Tampere, 33014 Tampere, Finland
| | - Jukka Uotila
- School of Medicine, University of Tampere, 33014 Tampere, Finland
- Department of Obstetrics and Gynecology, Tampere University Hospital, PL 2000, 33521 Tampere, Finland
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Brown LD, Permezel M, Holberton JR, Whitehead CL. Neonatal outcomes after introduction of a national intrapartum fetal surveillance education program: a retrospective cohort study. J Matern Fetal Neonatal Med 2016; 30:1777-1781. [PMID: 27534984 DOI: 10.1080/14767058.2016.1224839] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVE To determine the impact of a multidisciplinary fetal surveillance education program (FSEP) on term neonatal outcomes. METHODS A retrospective cohort study of term neonatal outcomes before (1998-2004) and after (2005-2010) introduction of a FSEP. Clinical data was collected for all term infants admitted to a neonatal intensive care unit (NICU) in Australia between 1998 and 2010. Infants with congenital abnormalities were excluded. Neonatal mortality and severe neonatal morbidity (admission to a NICU, respiratory support, hypoxic encephalopathy) were compared before and after the FSEP was introduced. The rates of operative delivery during this time were assessed. RESULTS There were 3 512 596 live term births between 1998 and 2010. The intrapartum hypoxic death rate at term decreased from 2.02 to 1.07 per 10 000 total births. More neonates were admitted to NICU after 2005 (10.6 versus 14.6 per 10 000 live births), however fewer babies admitted to the neonatal unit had Apgar scores < 5 at five minutes (55.1-45.5%, RR 0.82, 95% CI 0.7-0.87); and rates of hypoxic ischemic encephalopathy fell from 36% to 30% (RR 0.83, 95% CI 0.76-0.90). There was no increase in rates of emergency in labour caesarean sections (11.7% pre versus 11.1% post, RR 0.95, 95% CI 0.95-0.96). CONCLUSIONS Introduction of a national FSEP was associated with increased neonatal admissions but a reduction in intrapartum hypoxia, without increasing emergency caesarean section rates.
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Affiliation(s)
- L D Brown
- a Department of Obstetrics and Gynaecology , Mercy Hospital for Women , Heidelberg , Victoria , Australia
| | - M Permezel
- a Department of Obstetrics and Gynaecology , Mercy Hospital for Women , Heidelberg , Victoria , Australia.,b Department of Obstetrics and Gynaecology , University of Melbourne, Mercy Hospital for Women , Heidelberg , Victoria , Australia , and
| | - J R Holberton
- c On behalf of the Australian and New Zealand Neonatal Network , Lismore , NSW , Australia
| | - C L Whitehead
- b Department of Obstetrics and Gynaecology , University of Melbourne, Mercy Hospital for Women , Heidelberg , Victoria , Australia , and
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Lavery JA, Friedman AM, Keyes KM, Wright JD, Ananth CV. Gestational diabetes in the United States: temporal changes in prevalence rates between 1979 and 2010. BJOG 2016; 124:804-813. [PMID: 27510598 DOI: 10.1111/1471-0528.14236] [Citation(s) in RCA: 202] [Impact Index Per Article: 25.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/26/2016] [Indexed: 12/16/2022]
Abstract
OBJECTIVE To examine age-period-cohort effects on trends in gestational diabetes mellitus (GDM) prevalence in the US, and to evaluate how these trends have affected the rates of stillbirth and large for gestational age (LGA)/macrosomia. DESIGN Retrospective cohort study. SETTING USA, 1979-2010. POPULATION Over 125 million pregnancies (3 337 284 GDM cases) associated with hospitalisations. METHODS Trends in GDM prevalence were examined via weighted Poisson models to parse out the extent to which GDM trends can be attributed to maternal age, period of delivery, and maternal birth cohort. Multilevel models were used to assess the contribution of population effects to the rate of GDM. Log-linear Poisson regression models were used to estimate the contributions of the increasing GDM rates to changes in the rates of LGA and stillbirth between 1979-81 and 2008-10. MAIN OUTCOME MEASURES Rates and rate ratios (RRs). RESULTS Compared with 1979-1980 (0.3%), the rate of GDM has increased to 5.8% in 2008-10, indicating a strong period effect. Substantial age and modest cohort effects were evident. The period effect is partly explained by period trends in body mass index (BMI), race, and maternal smoking. The increasing prevalence of GDM is associated with a 184% (95% CI 180-188%) decline in the rate of LGA/macrosomia and a 0.75% (95% CI 0.74-0.76) increase in the rate of stillbirths for 2008-10, compared with 1979-81. CONCLUSIONS The temporal increase in GDM can be attributed to period of pregnancy and age. Increasing BMI appears to partially contribute to the GDM increase in the US. TWEETABLE ABSTRACT The increasing prevalence of GDM can be attributed to period of delivery and increasing maternal age.
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Affiliation(s)
- J A Lavery
- Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA.,Biostatistics Coordinating Center, Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - A M Friedman
- Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - K M Keyes
- Department of Epidemiology, Joseph L. Mailman School of Public Health, Columbia University, New York, NY, USA
| | - J D Wright
- Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA
| | - C V Ananth
- Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA.,Biostatistics Coordinating Center, Department of Obstetrics and Gynecology, College of Physicians and Surgeons, Columbia University, New York, NY, USA.,Department of Epidemiology, Joseph L. Mailman School of Public Health, Columbia University, New York, NY, USA
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31
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Simpson KR, Lyndon A, Davidson LA. Patient Safety Implications of Electronic Alerts and Alarms of Maternal - Fetal Status During Labor. Nurs Womens Health 2016; 20:358-366. [PMID: 27520600 DOI: 10.1016/j.nwh.2016.07.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Revised: 03/16/2016] [Indexed: 06/06/2023]
Abstract
When nurses care for women during labor, they encounter numerous alerts and alarms from electronic fetal monitors and their surveillance systems. Notifications of values of physiologic parameters for a woman and fetus that may be outside preset limits are generated via visual and audible cues. There is no standardization of these alert and alarm parameters among electronic fetal monitoring vendors in the United States, and there are no data supporting their sensitivity and specificity. Agreement among professional organizations about physiologic parameters for alerts and alarms commonly used during labor is lacking. It is unknown if labor nurses view the alerts and alarms as helpful or a nuisance. There is no evidence that they promote or hinder patient safety. This clinical issue warrants our attention as labor nurses.
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Leffert L. What's New in Obstetric Anesthesia: The 2014 Gerard W. Ostheimer Lecture. Anesth Analg 2016; 120:1065-1073. [PMID: 25811260 DOI: 10.1213/ane.0000000000000686] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Lisa Leffert
- From the Department of Anesthesia, Critical Care and Pain Medicine, Massachusetts General Hospital, Boston, Massachusetts
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Preterm cesarean delivery for nonreassuring fetal heart rate: neonatal and neurologic morbidity. Obstet Gynecol 2015; 125:636-642. [PMID: 25730227 DOI: 10.1097/aog.0000000000000673] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
OBJECTIVE To compare the rates of neonatal morbidity and cerebral palsy among preterm neonates (less than 37 weeks of gestation) delivered by cesarean for a nonreassuring fetal heart rate (FHR) tracing compared with those who did not. METHODS This was a secondary analysis of a multicenter randomized trial of MgSO4 for the prevention of cerebral palsy. Newborns of women delivered by cesarean delivery for nonreassuring FHR were compared with a control group composed of the offspring of women who labored for 2 hours or longer but did not undergo cesarean delivery for nonreassuring FHR regardless of the mode of delivery. Using multivariable analysis to adjust for potential confounders, our objective was to compare two outcomes: 1) composite neonatal morbidity (Apgar score 3 or less at 5 minutes, seizure, sepsis, necrotizing enterocolitis grade II or III, intraventricular hemorrhage grade III or IV, or death before discharge) and 2) neurologic injury (cerebral palsy) at 2 years or more of corrected age between the groups. RESULTS Of the 1,291 preterm neonates who met the inclusion criteria, 177 (14%) were delivered by cesarean for nonreassuring FHR compared with 1,114 (86%) in the control group. Composite neonatal morbidity was similar between the groups (30.5 compared with 22.2%, adjusted odds ratio [OR] 1.4, 95% confidence interval [CI] 0.9-2.1). The rate of cerebral palsy of any severity (8.3 compared with 4.0%, adjusted OR 2.3, 95% CI 1.2-4.5) and moderate-to-severe cerebral palsy at 2 years of corrected age (6.0 compared with 2.2%, adjusted OR 3.2, 95% CI 1.4-7.1) was significantly higher in children born through cesarean delivery for nonreassuring FHR. CONCLUSION Nonreassuring fetal tracing deemed so serious as to require cesarean delivery is associated with an increased risk of cerebral palsy in preterm neonates. LEVEL OF EVIDENCE II.
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Prior T, Kumar S. Expert review--identification of intra-partum fetal compromise. Eur J Obstet Gynecol Reprod Biol 2015; 190:1-6. [PMID: 25917435 DOI: 10.1016/j.ejogrb.2015.04.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2014] [Revised: 01/31/2015] [Accepted: 04/07/2015] [Indexed: 09/30/2022]
Abstract
Whilst most cases of cerebral palsy occur as a consequence of an ante-natal insult, a significant proportion, particularly in the term fetus, are attributable to intra-partum hypoxia. Intra-partum monitoring using continuous fetal heart rate assessment has led to an increased incidence of operative delivery without a concurrent reduction in the incidence of cerebral palsy. Despite this, birth asphyxia remains the strongest and most consistent risk factor for cerebral palsy in term infants. This review evaluates current intra-partum monitoring techniques as well as alternative approaches aimed at better identification of the fetus at risk of compromise in labour.
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Affiliation(s)
- Tomas Prior
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Du Cane Road, London W12 0HS, UK; Institute for Reproductive and Developmental Biology, Imperial College London, London W12 0HS, UK
| | - Sailesh Kumar
- Centre for Fetal Care, Queen Charlotte's and Chelsea Hospital, Du Cane Road, London W12 0HS, UK; Institute for Reproductive and Developmental Biology, Imperial College London, London W12 0HS, UK; Mater Research Institute/University of Queensland, Aubigny Place, Raymond Terrace, South Brisbane, QLD 4101, Australia.
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Grünebaum A, McCullough LB, Sapra KJ, Brent RL, Levene MI, Arabin B, Chervenak FA. Early and total neonatal mortality in relation to birth setting in the United States, 2006-2009. Am J Obstet Gynecol 2014; 211:390.e1-7. [PMID: 24662716 DOI: 10.1016/j.ajog.2014.03.047] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Revised: 02/12/2014] [Accepted: 03/19/2014] [Indexed: 11/16/2022]
Abstract
OBJECTIVE We examined neonatal mortality in relation to birth settings and birth attendants in the United States from 2006 through 2009. STUDY DESIGN Data from the Centers for Disease Control and Prevention-linked birth and infant death dataset in the United States from 2006 through 2009 were used to assess early and total neonatal mortality for singleton, vertex, and term births without congenital malformations delivered by midwives and physicians in the hospital and midwives and others out of the hospital. Deliveries by hospital midwives served as the reference. RESULTS Midwife home births had a significantly higher total neonatal mortality risk than deliveries by hospital midwives (1.26 per 1000 births; relative risk [RR], 3.87 vs 0.32 per 1000; P < .001). Midwife home births of 41 weeks or longer (1.84 per 1000; RR, 6.76 vs 0.27 per 1000; P < .001) and midwife home births of women with a first birth (2.19 per 1000; RR, 6.74 vs 0.33 per 1000; P < .001) had significantly higher risks of total neonatal mortality than deliveries by hospital midwives. In midwife home births, neonatal mortality for first births was twice that of subsequent births (2.19 vs 0.96 per 1000; P < .001). Similar results were observed for early neonatal mortality. The excess total neonatal mortality for midwife home births compared with midwife hospital births was 9.32 per 10,000 births, and the excess early neonatal mortality was 7.89 per 10,000 births. CONCLUSION Our study shows a significantly increased total and early neonatal mortality for home births and even higher risks for women of 41 weeks or longer and women having a first birth. These significantly increased risks of neonatal mortality in home births must be disclosed by all obstetric practitioners to all pregnant women who express an interest in such births.
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Affiliation(s)
- Amos Grünebaum
- Department of Obstetrics and Gynecology, Weill Medical College of Cornell University, New York, NY.
| | - Laurence B McCullough
- Center for Medical Ethics and Health Policy, Baylor College of Medicine, Houston, TX
| | - Katherine J Sapra
- Department of Epidemiology, Mailman School of Public Health, Columbia University, New York, NY
| | - Robert L Brent
- Department of Obstetrics and Gynecology, Weill Medical College of Cornell University, New York, NY; Alfred I. DuPont Hospital for Children, Thomas Jefferson University, Wilmington, DE
| | - Malcolm I Levene
- Division of Pediatrics and Child Health, University of Leeds, Leeds, England, UK
| | - Birgit Arabin
- Center for Mother and Child, Philipps University, Marburg, and Clara Angela Foundation, Berlin, Germany
| | - Frank A Chervenak
- Department of Obstetrics and Gynecology, Weill Medical College of Cornell University, New York, NY
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Csákány M G. [Past, present, future and benefits of "Tauffer", the Hungarian obstetric registry]. Orv Hetil 2014; 155:750-4. [PMID: 24796781 DOI: 10.1556/oh.2014.29921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Since more than 80 years, the Hungarian obstetric database, called Tauffer registry, shows the evolution as well as professional and organizational issues of the Hungarian obstetrics. The system, renewed in 1994, provides detailed on-line information about obstetric events in the website owned by the National Institute for Quality and Organizational Development in Healthcare and Medicines. Although a significant overlap between Tauffer registry and other databases exists, these databases improve the efficacy of Tauffer registry and they provide additional information on obstetric events. Tauffer registry is publicly available for anyone and its data can be used by professionals and professional managers. The author presents 3 examples to demonstrate the practical use of professional indicators obtained from Tauffer registry.
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Affiliation(s)
- György Csákány M
- Jahn Ferenc Dél-pesti Kórház, Rendelőintézet Budapest Köves út 1. 1201
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Automatic evaluation of progression angle and fetal head station through intrapartum echographic monitoring. COMPUTATIONAL AND MATHEMATICAL METHODS IN MEDICINE 2013; 2013:278978. [PMID: 24106524 PMCID: PMC3782760 DOI: 10.1155/2013/278978] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 08/02/2013] [Indexed: 12/13/2022]
Abstract
Labor progression is routinely assessed through transvaginal digital inspections, meaning that the clinical decisions taken during the most delicate phase of pregnancy are subjective and scarcely supported by technological devices.
In response to such inadequacies, we combined intrapartum echographic acquisitions with advanced tracking algorithms in a new method for noninvasive, quantitative, and automatic monitoring of labor. Aim of this work is the preliminary clinical validation and accuracy evaluation of our automatic algorithm in assessing progression angle (PA) and fetal head station (FHS). A cohort of 10 parturients underwent conventional labor management, with additional translabial echographic examinations after each uterine contraction. PA and FHS were evaluated by our automatic algorithm on the acquired images. Additionally, an experienced clinical sonographer, blinded regarding the algorithm results, quantified on the same acquisitions of the two parameters through manual contouring, which were considered as the standard reference in the evaluation of automatic algorithm and routine method accuracies. The automatic algorithm (mean error ± 2SD) provided a global accuracy of 0.9 ± 4.0 mm for FHS and 4° ± 9° for PA, which is far above the diagnostic ability shown by the routine method, and therefore it resulted in a reliable method for earlier identification of abnormal labor patterns in support of clinical decisions.
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