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Nerdrum Aagaard E, Solevåg AL, Saugstad OD. Significance of Neonatal Heart Rate in the Delivery Room-A Review. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1551. [PMID: 37761512 PMCID: PMC10528538 DOI: 10.3390/children10091551] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 09/08/2023] [Accepted: 09/12/2023] [Indexed: 09/29/2023]
Abstract
BACKGROUND Heart rate (HR) is considered the main vital sign in newborns during perinatal transition, with a threshold of 100 beats per minute (bpm), below which, intervention is recommended. However, recent changes in delivery room management, including delayed cord clamping, are likely to have influenced normal HR transition. OBJECTIVE To summarize the updated knowledge about the factors, including measurement methods, that influence HR in newborn infants immediately after birth. Additionally, this paper provides an overview of delivery room HR as a prognostic indicator in different subgroups of newborns. METHODS We searched PubMed, EMBASE, and Google Scholar with the terms infant, heart rate, delivery room, resuscitation, pulse oximetry, and electrocardiogram. RESULTS Seven studies that described HR values in newborn infants immediately after birth were included. Pulse oximetry-derived HR percentiles after immediate cord clamping may not be applicable to the current practice of delayed cord clamping and the increasing use of delivery room electrocardiograms. Mask ventilation may adversely affect HR, particularly in premature and non-asphyxiated infants. Prolonged bradycardia is a negative prognostic factor, especially if combined with hypoxemia in infants <32 weeks of gestation. CONCLUSIONS HR assessment in the delivery room remains important. However, the cardiopulmonary transition is affected by delayed cord clamping, gestational age, and underlying conditions.
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Affiliation(s)
- Ellisiv Nerdrum Aagaard
- Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0424 Oslo, Norway; (E.N.A.); (A.L.S.)
| | - Anne Lee Solevåg
- Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0424 Oslo, Norway; (E.N.A.); (A.L.S.)
| | - Ola Didrik Saugstad
- Department of Pediatric Research, University of Oslo, 0424 Oslo, Norway
- Department of Pediatrics, Robert H Lurie Medical Research Center, Northwestern University, Chicago, IL 60611, USA
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2
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Badurdeen S, Brooijmans E, Blank DA, Kuypers KLAM, Te Pas AB, Roberts C, Polglase GR, Hooper SB, Davis PG. Heart Rate Changes following Facemask Placement in Infants Born at ≥32+0 Weeks of Gestation. Neonatology 2023; 120:624-632. [PMID: 37531947 DOI: 10.1159/000531739] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 06/23/2023] [Indexed: 08/04/2023]
Abstract
INTRODUCTION Recent reports have raised concerns of cardiorespiratory deterioration in some infants receiving respiratory support at birth. We aimed to independently determine whether respiratory support with a facemask is associated with a decrease in heart rate (HR) in some late-preterm and term infants. METHODS Secondary analysis of data from infants born at ≥32+0 weeks of gestation at 2 perinatal centres in Melbourne, Australia. Change in HR up to 120 s after facemask placement, measured using 3-lead electrocardiography, was assessed every 3 s until 60 s and every 5 s thereafter from video recordings. RESULTS In the 15 s after facemask placement, 10/68 (15%) infants had a decrease in mean HR by >10 beats per minute (bpm) compared with their individual baseline mean HR in the 15 s before facemask placement. In 4 (6%) infants, HR decreased to <100 bpm. Nine out of 68 (13%) infants had an increase in mean HR by >10 bpm; 7 of these infants had a baseline HR <120 bpm. In univariable comparisons, the following characteristics were found not to be risk factors for a decrease in HR by >10 bpm: prematurity; type of respiratory support; hypoxaemia; early cord clamping; mode of birth; HR <120 bpm before mask placement. Six out of 63 infants (10%) who had HR ≥120 bpm after facemask placement had a late decrease in HR to <100 bpm between 30 and 120 s after facemask placement. CONCLUSION Facemask respiratory support at birth is temporally associated with a decrease in HR in a subset of late-preterm and term infants.
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Affiliation(s)
- Shiraz Badurdeen
- Newborn Research Centre, The Royal Women's Hospital, Parkville, Victoria, Australia
- The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Clayton, Victoria, Australia
- Department of Paediatrics, Mercy Hospital for Women, Melbourne, Victoria, Australia
| | - Elisa Brooijmans
- Division of Neonatology, Department of Paediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Centre, Leiden, The Netherlands
| | - Douglas A Blank
- The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Clayton, Victoria, Australia
- Monash Newborn, Monash Children's Hospital, Clayton, Victoria, Australia
| | - Kristel Leontina Anne Marie Kuypers
- Division of Neonatology, Department of Paediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Centre, Leiden, The Netherlands
| | - Arjan B Te Pas
- Division of Neonatology, Department of Paediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Centre, Leiden, The Netherlands
| | - Calum Roberts
- The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Clayton, Victoria, Australia
- Monash Newborn, Monash Children's Hospital, Clayton, Victoria, Australia
| | - Graeme R Polglase
- The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Clayton, Victoria, Australia
- Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia
| | - Stuart B Hooper
- The Ritchie Centre, Hudson Institute of Medical Research, Monash University, Clayton, Victoria, Australia
- Department of Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia
| | - Peter G Davis
- Newborn Research Centre, The Royal Women's Hospital, Parkville, Victoria, Australia
- Neonatal Research, Murdoch Children's Research Institute, Parkville, Victoria, Australia
- Department of Obstetrics and Gynaecology, The University of Melbourne, Parkville, Victoria, Australia
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Sehgal A, Allison BJ, Miller SL, Polglase GR, McNamara PJ, Hooper SB. Impact of Acute and Chronic Hypoxia-Ischemia on the Transitional Circulation. Pediatrics 2021; 147:peds.2020-016972. [PMID: 33622795 DOI: 10.1542/peds.2020-016972] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 09/30/2020] [Indexed: 11/24/2022] Open
Abstract
The transition from intrauterine life to extrauterine existence encompasses significant cardiorespiratory adaptations. These include rapid lung aeration and increase in pulmonary blood flow (PBF). Perinatal asphyxia and fetal growth restriction can severely hamper this transition. Hypoxia is the common denominator in these 2 disease states, with the former characterized by acute insult and the latter by utero-placental insufficiency and a chronic hypoxemic state. Both may manifest as hemodynamic instability. In this review, we emphasize the role of physiologic-based cord clamping in supplementing PBF during transition. The critical role of lung aeration in initiating pulmonary gas exchange and increasing PBF is discussed. Physiologic studies in animal models have enabled greater understanding of the mechanisms and effects of various therapies on transitional circulation. With data from sheep models, we elaborate instrumentation for monitoring of cardiovascular and pulmonary physiology and discuss the combined effect of chest compressions and adrenaline in improving transition at birth. Lastly, physiologic adaptation influencing management in human neonatal cohorts with respect to cardiac and vascular impairments in hypoxic-ischemic encephalopathy and growth restriction is discussed. Impairments in right ventricular function and vascular mechanics hold the key to prognostication and understanding of therapeutic rationale in these critically ill cohorts. The right ventricle and pulmonary circulation seem to be especially affected and may be explored as therapeutic targets. The role of comprehensive assessments using targeted neonatal echocardiography as a longitudinal, reliable, and easily accessible tool, enabling precision medicine facilitating physiologically appropriate treatment choices, is discussed.
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Affiliation(s)
- Arvind Sehgal
- Monash Newborn, Monash Children's Hospital, Melbourne, Victoria, Australia; .,Departments of Paediatrics and
| | - Beth J Allison
- Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria, Australia
| | - Suzanne L Miller
- Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria, Australia
| | - Graeme R Polglase
- Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria, Australia
| | - Patrick J McNamara
- Department of Pediatrics, University of Iowa Stead Family Children's Hospital, Iowa City, Iowa; and.,Internal Medicine, University of Iowa Health Care, Iowa City, Iowa
| | - Stuart B Hooper
- Obstetrics and Gynaecology, Monash University, Clayton, Victoria, Australia.,The Ritchie Centre, Hudson Institute of Medical Research, Clayton, Victoria, Australia
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4
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Polglase GR, Schmölzer GM, Roberts CT, Blank DA, Badurdeen S, Crossley KJ, Miller SL, Stojanovska V, Galinsky R, Kluckow M, Gill AW, Hooper SB. Cardiopulmonary Resuscitation of Asystolic Newborn Lambs Prior to Umbilical Cord Clamping; the Timing of Cord Clamping Matters! Front Physiol 2020; 11:902. [PMID: 32848852 PMCID: PMC7406709 DOI: 10.3389/fphys.2020.00902] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Accepted: 07/06/2020] [Indexed: 12/14/2022] Open
Abstract
Background: Current guidelines recommend immediate umbilical cord clamping (UCC) for newborns requiring chest compressions (CCs). Physiological-based cord clamping (PBCC), defined as delaying UCC until after lung aeration, has advantages over immediate UCC in mildly asphyxiated newborns, but its efficacy in asystolic newborns requiring CC is unknown. The aim of this study was to compare the cardiovascular response to CCs given prior to or after UCC in asystolic near-term lambs. Methods: Umbilical, carotid, pulmonary, and femoral arterial flows and pressures as well as systemic and cerebral oxygenation were measured in near-term sheep fetuses [139 ± 2 (SD) days gestation]. Fetal asphyxia was induced until asystole ensued, whereupon lambs received ventilation and CC before (PBCC; n = 16) or after (n = 12) UCC. Epinephrine was administered 1 min after ventilation onset and in 3-min intervals thereafter. The PBCC group was further separated into UCC at either 1 min (PBCC1, n = 8) or 10 min (PBCC10, n = 8) after return of spontaneous circulation (ROSC). Lambs were maintained for a further 30 min after ROSC. Results: The duration of CCs received and number of epinephrine doses required to obtain ROSC were similar between groups. After ROSC, we found no physiological benefits if UCC was delayed for 1 min compared to immediate cord clamping (ICC). However, if UCC was delayed for 10 min after ROSC, we found significant reductions in post-asphyxial rebound hypertension, cerebral blood flow, and cerebral oxygenation. The prevention of the post-asphyxial rebound hypertension in the PBCC10 group occurred due to the contribution of the placental circulation to a low peripheral resistance. As a result, left and right ventricular outputs continued to perfuse the placenta and were evidenced by reduced mean pulmonary blood flow, persistence of right-to-left shunting across the ductus arteriosus, and persistence of umbilical arterial and venous blood flows. Conclusion: It is possible to obtain ROSC after CC while the umbilical cord remains intact. There were no adverse effects of PBCC compared to ICC; however, the physiological changes observed after ROSC in the ICC and early PBCC groups may result in additional cerebral injury. Prolonging UCC after ROSC may provide significant physiological benefits that may reduce the risk of harm to the cerebral circulation.
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Affiliation(s)
- Graeme R Polglase
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, VIC, Australia
| | - Georg M Schmölzer
- Centre for the Studies of Asphyxia and Resuscitation, Neonatal Research Unit, Royal Alexandra Hospital, Edmonton, AB, Canada
| | - Calum T Roberts
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Douglas A Blank
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Paediatrics, Monash University, Melbourne, VIC, Australia
| | - Shiraz Badurdeen
- Newborn Research Centre, The Royal Women's Hospital, Melbourne, VIC, Australia
| | - Kelly J Crossley
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - Suzanne L Miller
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, VIC, Australia
| | - Vanesa Stojanovska
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - Robert Galinsky
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia
| | - Martin Kluckow
- Department of Neonatology, Royal North Shore Hospital, The University of Sydney, Sydney, NSW, Australia
| | - Andrew W Gill
- Centre for Neonatal Research and Education, The University of Western Australia, Subiaco, WA, Australia
| | - Stuart B Hooper
- The Ritchie Centre, Hudson Institute of Medical Research, Clayton, VIC, Australia.,Department of Obstetrics and Gynaecology, Monash University, Melbourne, VIC, Australia
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Defining information needs in neonatal resuscitation with work domain analysis. J Clin Monit Comput 2020; 35:689-710. [PMID: 32458169 DOI: 10.1007/s10877-020-00526-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Accepted: 05/07/2020] [Indexed: 12/30/2022]
Abstract
OBJECTIVE To gain a deeper understanding of the information requirements of clinicians conducting neonatal resuscitation in the first 10 min after birth. BACKGROUND During the resuscitation of a newborn infant in the first minutes after birth, clinicians must monitor crucial physiological adjustments that are relatively unobservable, unpredictable, and highly variable. Clinicians' access to information regarding the physiological status of the infant is also crucial to determining which interventions are most appropriate. To design displays to support clinicians during newborn resuscitation, we must first carefully consider the information requirements. METHODS We conducted a work domain analysis (WDA) for the neonatal transition in the first 10 min after birth. We split the work domain into two 'subdomains'; the physiology of the neonatal transition, and the clinical resources supporting the neonatal transition. A WDA can reveal information requirements that are not yet supported by resources. RESULTS The physiological WDA acted as a conceptual tool to model the exact processes and functions that clinicians must monitor and potentially support during the neonatal transition. Importantly, the clinical resources WDA revealed several capabilities and limitations of the physical objects in the work domain-ultimately revealing which physiological functions currently have no existing sensor to provide clinicians with information regarding their status. CONCLUSION We propose two potential approaches to improving the clinician's information environment: (1) developing new sensors for the information we lack, and (2) employing principles of ecological interface design to present currently available information to the clinician in a more effective way.
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Liley HG, Zestic J. The beating heart of newborn resuscitation. Resuscitation 2019; 143:223-224. [PMID: 31430513 DOI: 10.1016/j.resuscitation.2019.08.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Accepted: 08/10/2019] [Indexed: 11/25/2022]
Affiliation(s)
- Helen G Liley
- Faculty of Medicine and Mater Research, The University of Queensland, Australia.
| | - Jelena Zestic
- School of Psychology, Cognitive Engineering Research Group, The University of Queensland, Australia
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