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Shema N, Weintraub AY, Rotem R, Salem SY. The Correlation Between the Total Decelerations and Accelerations Areas and Cord Blood pH in Women with Low-Risk Pregnancies. Reprod Sci 2024; 31:1401-1407. [PMID: 38253982 DOI: 10.1007/s43032-024-01455-5] [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: 04/20/2023] [Accepted: 01/04/2024] [Indexed: 01/24/2024]
Abstract
Fetal acidosis among low-risk pregnancies is not common; however, identifying those at risk for this complication antenatally is of great interest. We aimed to assess the correlation between the total decelerations area during the last 120 min of fetal monitoring prior to delivery and neonatal acidemia in low-risk pregnancies and whether the total acceleration area has a protective effect in the presence of decelerations. A retrospective cohort study was conducted among women with term low-risk pregnancies. A researcher blinded to fetal outcomes interpreted electronic fetal monitor patterns during the 120 min prior to delivery. The primary outcome was fetal acidemia, defined as umbilical artery pH below 7.10. The correlation between the total decelerations and accelerations areas and cord blood pH was tested using the Spearman correlation coefficient. A total of 109 women were included and of these, six (5.5%) delivered infants with cord blood pH < 7.10. A significant correlation was demonstrated between the total decelerations area and cord blood pH (p = 0.01). No correlation was found between the total accelerations area and cord blood pH. Among low-risk pregnancies, a correlation was found between the total decelerations area but not the total accelerations area during the final 120 min of labor and cord blood pH.
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Affiliation(s)
- Noam Shema
- Department of Obstetrics and Gynecology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Soroka University Medical Center, Beer Sheva, Israel.
- Joyce and Irving Goldman School of Medicine, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.
| | - Adi Y Weintraub
- Department of Obstetrics and Gynecology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Soroka University Medical Center, Beer Sheva, Israel
| | - Reut Rotem
- Department of Obstetrics and Gynecology, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Shimrit Yaniv Salem
- Department of Obstetrics and Gynecology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Soroka University Medical Center, Beer Sheva, Israel
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Geva N, Geva Y, Salem SY, Marks KA, Rotem R, Abramsky R, Hershkovitz R, Shelef I, Novik EF, Weintraub AY, Shany E. The association of intrapartum deceleration and acceleration areas with MRI findings in neonatal encephalopathy. Pediatr Res 2023; 94:1119-1124. [PMID: 36964444 DOI: 10.1038/s41390-023-02575-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/11/2023] [Accepted: 03/08/2023] [Indexed: 03/26/2023]
Abstract
BACKGROUND Hypoxic-ischemic encephalopathy (HIE) is an important contributor to disability worldwide. The current cardiotocography (CTG) predictive value for neonatal outcome is limited. OBJECTIVE To assess the association of intrapartum CTG deceleration and acceleration areas with early MRI cerebral pathology in infants with HIE. METHODS Term and near-term low-risk pregnancies that resulted in HIE, treated with therapeutic hypothermia with sufficient CTG records from a single, tertiary hospital between 2013 and 2021 were enrolled. Accelerations and decelerations areas, their minimum and maximum depths, and duration were calculated as well as the acceleration-to-deceleration area ratio during the 120 min prior to delivery. These data were assessed for associations with higher degrees of abnormality on early MRI scans. RESULTS A total of 77 infants were included in the final analysis. Significant associations between increased total acceleration area (p = 0.007) and between a higher acceleration-to-deceleration area ratio (p = 0.003) and better MRI results were detected. CONCLUSION In neonates treated for HIE, acceleration area and acceleration-to-deceleration ratio are associated with the risk of neonatal brain MRI abnormalities. To increase the role of these measurements as a relevant clinical tool, larger, more powered prospective trials are needed, using computerized real-time analysis. IMPACT The current cardiotocography predictive value for neonatal outcome is limited. This study aimed to assess the association of intrapartum deceleration and acceleration areas with the degree of cerebral injury in early cerebral MRI of neonates with encephalopathy. Lower acceleration area and acceleration-to-deceleration ratio were found to be associated with a higher degree of neonatal brain injury. Brain MRI is a marker of long-term outcome; its association with cardiotocography indices supports their association with long-term outcome in these neonates. Future computer-based CTG area analysis could assist in delivery room decision making to better time interventions and prevent hypoxic-ischemic encephalopathy.
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Affiliation(s)
- Neta Geva
- Department of Neonatology, Sheril and Haim Saban Children Hospital, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer-Sheva, Israel.
| | - Yael Geva
- Department of Obstetrics and Gynecology, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer Sheva, Israel
| | - Shimrit Yaniv Salem
- Department of Obstetrics and Gynecology, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer Sheva, Israel
| | - Kyla Anna Marks
- Department of Neonatology, Sheril and Haim Saban Children Hospital, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer-Sheva, Israel
| | - Reut Rotem
- Division of Obstetrics and Gynecology, Shaare Zedek Medical Center, Hebrew University Medical School, Jerusalem, Israel
| | - Ramy Abramsky
- Department of Neonatology, Sheril and Haim Saban Children Hospital, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer-Sheva, Israel
| | - Reli Hershkovitz
- Department of Obstetrics and Gynecology, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer Sheva, Israel
| | - Ilan Shelef
- Department of Medical Imaging, Soroka Medical Center and the, Ben-Gurion University of the Negev Zlotowski Center for Neuroscience, Beer-Sheva, Israel
| | - Evelyn Farkash Novik
- Department of Medical Imaging, Soroka Medical Center and the, Ben-Gurion University of the Negev Zlotowski Center for Neuroscience, Beer-Sheva, Israel
| | - Adi Yehuda Weintraub
- Department of Obstetrics and Gynecology, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer Sheva, Israel
| | - Eilon Shany
- Department of Neonatology, Sheril and Haim Saban Children Hospital, Soroka Medical Center, Ben-Gurion University of the Negev Faculty of Health Sciences, Beer-Sheva, Israel
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Cohen G, Ravid D, Gnaiem N, Gluska H, Schreiber H, Haleluya NL, Biron-Shental T, Kovo M, Markovitch O. The Impact of Total Deceleration Area and Fetal Growth on Neonatal Acidemia in Vacuum Extraction Deliveries. CHILDREN (BASEL, SWITZERLAND) 2023; 10:children10050776. [PMID: 37238325 DOI: 10.3390/children10050776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 04/22/2023] [Accepted: 04/24/2023] [Indexed: 05/28/2023]
Abstract
We aimed to investigate the correlation between total deceleration area (TDA), neonatal birthweight and neonatal acidemia in vacuum extractions (VEs). This is a retrospective study in a tertiary hospital, including VE performed due to non-reassuring fetal heart rate (NRFHR). Electronic fetal monitoring during the 120 min preceding delivery was interpreted by two obstetricians who were blinded to neonatal outcomes. TDA was calculated as the sum of the area under the curve for each deceleration. Neonatal birthweights were classified as low (<2500 g), normal (2500-3999 g) or macrosomic (>4000 g). A total of 85 VEs were analyzed. Multivariable linear regression, adjusted for gestational age, nulliparity and diabetes mellitus, revealed a negative correlation between TDA in the 60 min preceding delivery and umbilical cord pH. For every 10 K increase in TDA, the cord pH decreased by 0.02 (p = 0.038; 95%CI, -0.05-0.00). The use of the Ventouse-Mityvac cup was associated with a 0.08 decrease in cord pH as compared to the Kiwi OmniCup (95%CI, -0.16-0.00; p = 0.049). Low birthweights, compared to normal birthweights, were not associated with a change in cord pH. To conclude, a significant correlation was found between TDA during the 60 min preceding delivery and cord pH in VE performed due to NRFHR.
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Affiliation(s)
- Gal Cohen
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428163, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Dorit Ravid
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428163, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Nagam Gnaiem
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428163, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Hadar Gluska
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428163, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Hanoch Schreiber
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Ob-Gyn Ultrasound Unit, Meir Medical Center, Kfar Saba 4428164, Israel
| | - Noa Leybovitz Haleluya
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Beer Sheba 8410101, Israel
| | - Tal Biron-Shental
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428163, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Michal Kovo
- Department of Obstetrics and Gynecology, Meir Medical Center, Kfar Saba 4428163, Israel
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ofer Markovitch
- Sackler School of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
- Ob-Gyn Ultrasound Unit, Meir Medical Center, Kfar Saba 4428164, Israel
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Lear CA, Georgieva A, Beacom MJ, Wassink G, Dhillon SK, Lear BA, Mills OJ, Westgate JA, Bennet L, Gunn AJ. Fetal heart rate responses in chronic hypoxaemia with superimposed repeated hypoxaemia consistent with early labour: a controlled study in fetal sheep. BJOG 2023. [PMID: 36808862 DOI: 10.1111/1471-0528.17425] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 01/30/2023] [Accepted: 02/09/2023] [Indexed: 02/20/2023]
Abstract
OBJECTIVE Deceleration area (DA) and capacity (DC) of the fetal heart rate can help predict risk of intrapartum fetal compromise. However, their predictive value in higher risk pregnancies is unclear. We investigated whether they can predict the onset of hypotension during brief hypoxaemia repeated at a rate consistent with early labour in fetal sheep with pre-existing hypoxaemia. DESIGN Prospective, controlled study. SETTING Laboratory. SAMPLE Chronically instrumented, unanaesthetised near-term fetal sheep. METHODS One-minute complete umbilical cord occlusions (UCOs) were performed every 5 minutes in fetal sheep with baseline pa O2 <17 mmHg (hypoxaemic, n = 8) and >17 mmHg (normoxic, n = 11) for 4 hours or until arterial pressure fell <20 mmHg. MAIN OUTCOME MEASURES DA, DC and arterial pressure. RESULTS Normoxic fetuses showed effective cardiovascular adaptation without hypotension and mild acidaemia (lowest arterial pressure 40.7 ± 2.8 mmHg, pH 7.35 ± 0.03). Hypoxaemic fetuses developed hypotension (lowest arterial pressure 20.8 ± 1.9 mmHg, P < 0.001) and acidaemia (final pH 7.07 ± 0.05). In hypoxaemic fetuses, decelerations showed faster falls in FHR over the first 40 seconds of UCOs but the final deceleration depth was not different to normoxic fetuses. DC was modestly higher in hypoxaemic fetuses during the penultimate (P = 0.04) and final (P = 0.012) 20 minutes of UCOs. DA was not different between groups. CONCLUSION Chronically hypoxaemic fetuses had early onset of cardiovascular compromise during labour-like brief repeated UCOs. DA was unable to identify developing hypotension in this setting, while DC only showed modest differences between groups. These findings highlight that DA and DC thresholds need to be adjusted for antenatal risk factors, potentially limiting their clinical utility.
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Affiliation(s)
- C A Lear
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - A Georgieva
- Nuffield Department of Women's and Reproductive Health, The John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - M J Beacom
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - G Wassink
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - S K Dhillon
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - B A Lear
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - O J Mills
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - J A Westgate
- Department of Obstetrics and Gynaecology, The University of Auckland, Auckland, New Zealand
| | - L Bennet
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - A J Gunn
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.,Starship Children's Hospital, Auckland, New Zealand
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Geva Y, Yaniv Salem S, Geva N, Rotem R, Talmor M, Shema N, Shany E, Weintraub AY. Intrapartum deceleration and acceleration areas are associated with neonatal encephalopathy. Int J Gynaecol Obstet 2022; 161:1061-1068. [PMID: 36572017 DOI: 10.1002/ijgo.14638] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 11/08/2022] [Accepted: 12/09/2022] [Indexed: 12/27/2022]
Abstract
OBJECTIVE To investigate whether an association exists between deceleration and acceleration areas on continuous fetal cardiotocography (CTG) and neonatal encephalopathy (NE). METHODS A single center, retrospective case-control study was conducted to compare CTG characteristics of low-risk pregnancies (35 weeks of gestation or more), complicated by moderate to severe NE with two matched controls for every case. Controls were matched by gestational age and cord blood pH. We analyzed the intrapartum CTG recordings by calculation of the deceleration and acceleration areas and the ratio between the two. RESULTS During the period between 2013 and 2019, we identified 95 cases of low-risk pregnancies that were complicated by moderate to severe NE in our center. Thirty-three (34.7%) deliveries were excluded, mostly because of an insufficient duration of the CTG recordings. The remaining 62 cases were matched with 123 controls. We found that NE was significantly associated with an increased total deceleration area, a decreased total acceleration area, and a lower acceleration-to-deceleration ratio. CONCLUSIONS NE was significantly associated with increased total deceleration area, decreased total acceleration area, and a lower acceleration-to-deceleration ratio, independent of cord blood pH. Development of a computerized real-time analysis of fetal heart rate tracings may contribute to making these measurements a more valid clinical tool.
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Affiliation(s)
- Yael Geva
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Shimrit Yaniv Salem
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Neta Geva
- Department of Neonatology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.,Pediatric Division, Saban Pediatric Medical Center, Soroka University Medical Center, Beer Sheva, Israel
| | - Reut Rotem
- Division of Obstetrics and Gynecology, Shaare Zedek Medical Center, Hebrew University Medical School, Jerusalem, Israel
| | - Meital Talmor
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Noam Shema
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Eilon Shany
- Department of Neonatology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Adi Y Weintraub
- Department of Obstetrics and Gynecology, Soroka University Medical Center, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
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Matmor Loeub S, Weintraub AY, Rotem R, Geva Y, Yaniv Salem S. Correlation between total deceleration area and fetal cord blood pH in neonates complicated with meconium-stained amniotic fluid at term. Int J Gynaecol Obstet 2022; 159:974-978. [PMID: 35598120 DOI: 10.1002/ijgo.14274] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2021] [Revised: 04/10/2022] [Accepted: 05/10/2022] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To assess the correlation between total area under the Curve (AUC) of decelerations and accelerations and neonatal acidemia in pregnancies complicated with meconium-stained amniotic fluid (MSAF). METHODS A retrospective cohort study was conducted among women who delivered with a diagnosis of MSAF. Electronic fetal monitoring (EFM) patterns 120 min before delivery were interpreted by a researcher blinded to fetal outcomes. The primary outcome was fetal acidemia, defined as umbilical artery pH below 7.10. The correlation was tested using the Spearman correlation coefficient. RESULTS A total of 102 women were included; 24 delivered infants with cord blood pH < 7.20, and only five delivered infants with cord blood pH < 7.10. A significant correlation was demonstrated between total AUC of decelerations and accelerations and cord blood pH (P = 0.02). A sub-analysis according to gestational age at delivery (up to and beyond 40 weeks) was conducted. A significant correlation was demonstrated (P = 0.02) only in the term group(n = 37). CONCLUSION A correlation was demonstrated between total AUC of decelerations and accelerations and cord blood pH in neonates with MSAF. This correlation was significant for neonates delivered before 40 weeks of gestation, but not for those delivered after 40 weeks of gestation.
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Affiliation(s)
- Shirel Matmor Loeub
- Joyce and Irving Goldman School of Medicine, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel
| | - Adi Y Weintraub
- Joyce and Irving Goldman School of Medicine, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel.,Department of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Reut Rotem
- Department of Obstetrics and Gynecology, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Yael Geva
- Department of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Ben Gurion University of the Negev, Beer Sheva, Israel
| | - Shimrit Yaniv Salem
- Department of Obstetrics and Gynecology, Soroka University Medical Center, School of Medicine, Ben Gurion University of the Negev, Beer Sheva, Israel
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Gyllencreutz E, Varli IH, Lindqvist PG, Holzmann M. Variable deceleration features and intrapartum fetal acidemia - The role of deceleration area. Eur J Obstet Gynecol Reprod Biol 2021; 267:192-197. [PMID: 34826666 DOI: 10.1016/j.ejogrb.2021.11.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Revised: 11/02/2021] [Accepted: 11/05/2021] [Indexed: 10/19/2022]
Abstract
OBJECTIVE In recent years deceleration area has received increasing attention as a potential predictor of intrapartum fetal hypoxia. In several studies, the area has been manually esteemed as triangular in shape, which might introduce bias. In addition, the commonly used outcome acidemia in umbilical artery is affected by mode of delivery. We wanted to investigate the association between the variable deceleration features area, duration, depth and cumulative deceleration area (30 and 60 min) and intrapartum fetal acidemia measured as lactate concentration at fetal scalp blood sampling (FBS) in immediate connection to the decelerations. STUDY DESIGN In the source population of 1070 labors at Karolinska University Hospital, Sweden, with FBS performed on indication, we found 507 fetuses with predominantly variable decelerations as the indication for FBS. We examined the last 60- and 30-minutes of fetal monitoring preceding the FBS with focus on deceleration area, duration and depth. The contours of the decelerations were outlined manually but the area was calculated with a computer software program. We assessed area, duration and depth both as mean values per deceleration and as cumulative values during the time period of interest. We analyzed Pearson correlations and area under receiver operating characteristics curves (AUC). We also performed an adjusted analysis, with baseline frequency, variability, and accelerations as covariates. RESULTS Deceleration area and duration were the best predictors of intrapartum fetal acidemia (fetal lactate concentration >4.8 mmol/L measured with Lactate Pro™) with AUCs of 0.671 (0.682) and 0.678 (0.683) for cumulative measures during 30 (60) minutes prior to FBS, compared to deceleration depth with AUC of 0.632 (0.631). Corresponding Pearson correlations in 30-min (60-min) groups were 0.329 (0.335) and 0.358 (0.354) for deceleration area and duration and 0.212 (0.204) for deceleration depth. Using 250 beats cumulative cut-off for deceleration area during last 30 min, 71% vs. 43% were acidemic and non-acidemic, odds ratio = 3.2 (95% CI 1.7-6.1). CONCLUSIONS Deceleration area and duration were better predictors of intrapartum fetal acidemia than deceleration depth. Cumulative deceleration area >250 beats during 30 min was associated with three-fold higher odds of intrapartum acidemia compared to <250 beats.
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Affiliation(s)
- Erika Gyllencreutz
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Department of Obstetrics and Gynecology, Östersund Hospital, Region Jämtland Härjedalen, Sweden
| | - Ingela Hulthén Varli
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Medical Unit Pregnancy and Childbirth, Karolinska University Hospital, Stockholm, Sweden
| | - Pelle G Lindqvist
- Department of Clinical Sciences and Education, Sodersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - Malin Holzmann
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Medical Unit Pregnancy and Childbirth, Karolinska University Hospital, Stockholm, Sweden.
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Georgieva A, Lear CA, Westgate JA, Kasai M, Miyagi E, Ikeda T, Gunn AJ, Bennet L. Deceleration area and capacity during labour-like umbilical cord occlusions identify evolving hypotension: a controlled study in fetal sheep. BJOG 2021; 128:1433-1442. [PMID: 33369871 DOI: 10.1111/1471-0528.16638] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/18/2020] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Cardiotocography is widely used to assess fetal well-being during labour. The positive predictive value of current clinical algorithms to identify hypoxia-ischaemia is poor. In experimental studies, fetal hypotension is the strongest predictor of hypoxic-ischaemic injury. Cohort studies suggest that deceleration area and deceleration capacity of the fetal heart rate trace correlate with fetal acidaemia, but it is not known whether they are indices of fetal arterial hypotension. DESIGN Prospective, controlled study. SETTING Laboratory. SAMPLE Near-term fetal sheep. METHODS One minute of complete umbilical cord occlusions (UCOs) every 5 minutes (1:5 min, n = 6) or every 2.5 minutes (1:2.5 min, n = 12) for 4 hours or until fetal mean arterial blood pressure fell <20 mmHg. MAIN OUTCOME MEASURES Deceleration area and capacity during the UCO series were related to evolving hypotension. RESULTS The 1:5 min group developed only mild metabolic acidaemia, without hypotension. By contrast, 10/12 fetuses in the 1:2.5-min group progressively developed severe metabolic acidaemia and hypotension, reaching 16.8 ± 0.9 mmHg after 71.2 ± 6.7 UCOs. Deceleration area and capacity remained unchanged throughout the UCO series in the 1:5-min group, but progressively increased in the 1:2.5-min group. The severity of hypotension was closely correlated with both deceleration area (P < 0.001, R2 = 0.66, n = 18) and capacity (P < 0.001, R2 = 0.67, n = 18). Deceleration area and capacity predicted development of hypotension at a median of 103 and 123 minutes before the final occlusion, respectively. CONCLUSIONS Both deceleration area and capacity were strongly associated with developing fetal hypotension, supporting their potential to improve identification of fetuses at risk of hypotension leading to hypoxic-ischaemic injury during labour. TWEETABLE ABSTRACT Deceleration area and capacity of fetal heart rate identify developing hypotension during labour-like hypoxia.
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Affiliation(s)
- A Georgieva
- Nuffield Department of Women's and Reproductive Health, The John Radcliffe Hospital, University of Oxford, Oxford, UK
| | - C A Lear
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - J A Westgate
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - M Kasai
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand.,The Department of Obstetrics and Gynecology, Yokohama City University, Yokohama, Japan
| | - E Miyagi
- The Department of Obstetrics and Gynecology, Yokohama City University, Yokohama, Japan
| | - T Ikeda
- Department of Obstetrics and Gynecology, Mie University, Mie, Japan
| | - A J Gunn
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
| | - L Bennet
- Fetal Physiology and Neuroscience Group, Department of Physiology, The University of Auckland, Auckland, New Zealand
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Lear CA, Westgate JA, Ugwumadu A, Nijhuis JG, Stone PR, Georgieva A, Ikeda T, Wassink G, Bennet L, Gunn AJ. Understanding Fetal Heart Rate Patterns That May Predict Antenatal and Intrapartum Neural Injury. Semin Pediatr Neurol 2018; 28:3-16. [PMID: 30522726 DOI: 10.1016/j.spen.2018.05.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Electronic fetal heart rate (FHR) monitoring is widely used to assess fetal well-being throughout pregnancy and labor. Both antenatal and intrapartum FHR monitoring are associated with a high negative predictive value and a very poor positive predictive value. This in part reflects the physiological resilience of the healthy fetus and the remarkable effectiveness of fetal adaptations to even severe challenges. In this way, the majority of "abnormal" FHR patterns in fact reflect a fetus' appropriate adaptive responses to adverse in utero conditions. Understanding the physiology of these adaptations, how they are reflected in the FHR trace and in what conditions they can fail is therefore critical to appreciating both the potential uses and limitations of electronic FHR monitoring.
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Affiliation(s)
- Christopher A Lear
- Department of Physiology, The Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Jenny A Westgate
- Department of Physiology, The Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand; Department of Obstetrics and Gynaecology, The University of Auckland, Auckland, New Zealand
| | - Austin Ugwumadu
- Department of Obstetrics and Gynaecology, St George's, University of London, London, United Kingdom
| | - Jan G Nijhuis
- Department of Obstetrics and Gynaecology, GROW School for Oncology and Developmental Biology, Maastricht University Medical Center, Maastricht, Netherlands
| | - Peter R Stone
- Department of Obstetrics and Gynaecology, The University of Auckland, Auckland, New Zealand
| | - Antoniya Georgieva
- Nuffield Department of Obstetrics and Gynaecology, The John Radcliffe Hospital, University of Oxford, Oxford, United Kingdom
| | - Tomoaki Ikeda
- Department of Obstetrics and Gynaecology, Mie University Graduate School of Medicine, Mie, Japan
| | - Guido Wassink
- Department of Physiology, The Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Laura Bennet
- Department of Physiology, The Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand
| | - Alistair J Gunn
- Department of Physiology, The Fetal Physiology and Neuroscience Group, The University of Auckland, Auckland, New Zealand; Department of Paediatrics, Starship Children's Hospital, Auckland, New Zealand.
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10
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Gyllencreutz E, Lu K, Lindecrantz K, Lindqvist PG, Nordstrom L, Holzmann M, Abtahi F. Validation of a computerized algorithm to quantify fetal heart rate deceleration area. Acta Obstet Gynecol Scand 2018; 97:1137-1147. [PMID: 29768660 DOI: 10.1111/aogs.13370] [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: 01/24/2018] [Accepted: 04/29/2018] [Indexed: 11/28/2022]
Abstract
INTRODUCTION Reliability in visual cardiotocography interpretation is unsatisfying, which has led to the development of computerized cardiotocography. Computerized analysis is well established for antenatal fetal surveillance but has yet not performed sufficiently during labor. We aimed to investigate the capacity of a new computerized algorithm compared with visual assessment in identifying intrapartum fetal heart rate baseline and decelerations. MATERIAL AND METHODS In all, 312 intrapartum cardiotocography tracings with variable decelerations were analyzed by the computerized algorithm and visually examined by two observers, blinded to each other and the computer analysis. The width, depth and area of each deceleration was measured. Four cases (>100 variable decelerations) were subjected to in-depth detailed analysis. The outcome measures were bias in seconds (width), beats per minute (depth), and beats (area) between computer and observers using Bland-Altman analysis. Interobserver reliability was determined by calculating intraclass correlation and Spearman rank analysis. RESULTS The analysis (312 cases) showed excellent intraclass correlation (0.89-0.95) and very strong Spearman correlation (0.82-0.91). The detailed analysis of >100 decelerations in four cases revealed low bias between the computer and the two observers; width 1.4 and 1.4 seconds, depth 5.1 and 0.7 beats per minute, and area 0.1 and -1.7 beats. This was comparable to the bias between the two observers: 0.3 seconds (width), 4.4 beats per minute (depth) and 1.7 beats (area). The intraclass correlation was excellent (0.90-.98). CONCLUSION A novel computerized algorithm for intrapartum cardiotocography analysis is as accurate as gold standard visual assessment, with high correlation and low bias.
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Affiliation(s)
- Erika Gyllencreutz
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Department of Obstetrics and Gynecology, Östersund Hospital, Region Jämtland Härjedalen, Östersund, Sweden
| | - Ke Lu
- School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden
| | - Kaj Lindecrantz
- School of Technology and Health, Royal Institute of Technology, Stockholm, Sweden.,Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden
| | - Pelle G Lindqvist
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden.,Pregnancy and Delivery Care, Karolinska University Hospital, Stockholm, Sweden
| | - Lennart Nordstrom
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Pregnancy and Delivery Care, Karolinska University Hospital, Stockholm, Sweden
| | - Malin Holzmann
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Pregnancy and Delivery Care, Karolinska University Hospital, Stockholm, Sweden
| | - Farhad Abtahi
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Physiology, Karolinska University Hospital Huddinge, Stockholm, Sweden
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11
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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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12
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Martí Gamboa S, Pascual Mancho J, Lapresta Moros M, Rodríguez Lázaro L, de Bonrostro Torralba C, Castán Mateo S. Atypical decelerations: do they matter? J Matern Fetal Neonatal Med 2016; 30:240-244. [PMID: 27003711 DOI: 10.3109/14767058.2016.1169524] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
OBJECTIVE To estimate the association between atypical variable decelerations and neonatal acidemia. METHOD We conducted a one-year case-control study comparing the last thirty minutes before delivery of fetal heart rate tracings of 102 acidemic neonates (umbilical arterial cord gas pH ≤ 7.10) with 100 non-acidemic controls (umbilical arterial cord gas pH > 7.10). Incidence of atypical features and total number of decelerations, number of atypical decelerations, number of slow return decelerations and number of decelerations with loss of moderate variability during deceleration were extracted. We estimated the association between atypical features, neonatal acidemia and neonatal morbidity. RESULTS Acidemic neonates showed a larger number of atypical decelerations (4 [0-12] vs. 3 [0-10]), "slow return" decelerations (4 [0-11] vs. 1 [0-10]) and decelerations with non-moderate variability (0[0-12] vs. 0 [0-6]) compared to non-acidemic controls. "Slow return" was significantly associated with an increased risk of acidemia at birth (OR 4.46; CI 95%: 2.18 - 9.15) "Slow return" was the most discriminating feature between groups with an AUC: 0.745. CONCLUSION Certain atypical features, as "slow return" and loss of moderate variability within decelerations are associated with neonatal acidemia. "Slow return" could help in the gradation of acidemia risk levels, as an indicator of gravity.
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Affiliation(s)
- Sabina Martí Gamboa
- a Department of Obstetrics , Miguel Servet University Hospital , Zaragoza , Spain
| | - Jara Pascual Mancho
- a Department of Obstetrics , Miguel Servet University Hospital , Zaragoza , Spain
| | - María Lapresta Moros
- a Department of Obstetrics , Miguel Servet University Hospital , Zaragoza , Spain
| | | | | | - Sergio Castán Mateo
- a Department of Obstetrics , Miguel Servet University Hospital , Zaragoza , Spain
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13
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Tranquilli AL, Biagini A, Greco P, Di Tommaso M, Giannubilo SR. The correlation between fetal bradycardia area in the second stage of labor and acidemia at birth. J Matern Fetal Neonatal Med 2013; 26:1425-9. [DOI: 10.3109/14767058.2013.784263] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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14
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Tranquilli AL. Fetal heart rate in the second stage of labor: recording, reading, interpreting and acting. J Matern Fetal Neonatal Med 2012; 25:2551-4. [DOI: 10.3109/14767058.2012.718395] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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