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Solís-García G, Bravo MC, Pellicer A. Cardiorespiratory interactions during the transitional period in extremely preterm infants: a narrative review. Pediatr Res 2024:10.1038/s41390-024-03451-6. [PMID: 39179873 DOI: 10.1038/s41390-024-03451-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 07/03/2024] [Accepted: 07/18/2024] [Indexed: 08/26/2024]
Abstract
We aimed to review the physiology and evidence behind cardiorespiratory interactions during the transitional circulation of extremely preterm infants with fragile physiology and to propose a framework for future research. Cord clamping strategies have a great impact on initial haemodynamic changes, and appropriate transition can be facilitated by establishing spontaneous ventilation before cord clamping. Mechanical ventilation modifies preterm transitional haemodynamics, with positive pressure ventilation affecting the right and left heart loading conditions. Pulmonary vascular resistances can be minimized by ventilating with optimal lung volumes at functional residual capacity, and other pulmonary vasodilator treatments such as inhaled nitric oxide can be used to improve ventilation/perfusion mismatch. Different cardiovascular drugs can be used to provide support during transition in this population, and it is important to understand both their cardiovascular and respiratory effects, in order to provide adequate support to vulnerable preterm infants and improve outcomes. Current available non-invasive bedside tools, such as near-infrared spectroscopy, targeted neonatal echocardiography, or lung ultrasound offer the opportunity to precisely monitor cardiorespiratory interactions in preterm infants. More research is needed in this field using precision medicine to strengthen the benefits and avoid the harms associated to early neonatal interventions. IMPACT: In extremely preterm infants, haemodynamic and respiratory transitions are deeply interconnected, and their changes have a key impact in the establishment of lung aireation and postnatal circulation. We describe how mechanical ventilation modifies heart loading conditions and pulmonary vascular resistances in preterm patients, and how hemodynamic interventions such as cord clamping strategies or cardiovascular drugs affect the infant respiratory status. Current available non-invasive bedside tools can help monitor cardiorespiratory interactions in preterm infants. We highlight the areas of research in which precision medicine can help strengthen the benefits and avoid the harms associated to early neonatal interventions.
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Affiliation(s)
- Gonzalo Solís-García
- Department of Neonatology, La Paz University Hospital and IdiPaz (La Paz Hospital Institute for Health Research), Madrid, Spain.
| | - María Carmen Bravo
- Department of Neonatology, La Paz University Hospital and IdiPaz (La Paz Hospital Institute for Health Research), Madrid, Spain
- Consultant Neonatologist, Rotunda Hospital, Dublin, Ireland
| | - Adelina Pellicer
- Department of Neonatology, La Paz University Hospital and IdiPaz (La Paz Hospital Institute for Health Research), Madrid, Spain
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Surak A, Bischoff A. Should SVC flow be a routine measure when performing targeted neonatal echocardiography? A narrative review. Pediatr Neonatol 2024; 65:323-327. [PMID: 38341334 DOI: 10.1016/j.pedneo.2024.01.001] [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: 08/18/2023] [Revised: 12/05/2023] [Accepted: 01/09/2024] [Indexed: 02/12/2024] Open
Abstract
Superior vena cava is commonly used in neonatal hemodynamics and is suggested to be the best available non-invasive marker for systemic circulation in preterm infants. Inter- and intra-observer variability remain to be an issue. Its association with neonatal outcomes is has not been established. This is a narrative review about this marker, its use, and its potential pitfalls. OBJECTIVE This is a narrative review about SVC flow in preterm infants, physiology, techniques of measurement and its potential association with outcomes. SOURCES Literature revie mainly PubMED. SUMMARY OF THE FINDINGS SVC flow measurement has some limitations and pitfalls. CONCLUSIONS SVC flow association with neonatal outcomes, still needs to be established in further research.
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Affiliation(s)
- Aimann Surak
- Philip C. Etches Neonatal Intensive Care Unit, DTC 5027, 10240 Kingsway NW, Edmonton, Alberta, Canada, T5H 3V9.
| | - Adrianne Bischoff
- University of Iowa Stead Family Children's Hospital, Iowa City, IA, USA.
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Ramaswamy VV, Kumar G, Abdul Kareem P, Somasekhara Aradhya A, Suryawanshi P, Sahni M, Khurana S, Sharma D, More K. Comparative efficacy of volume expansion, inotropes and vasopressors in preterm neonates with probable transitional circulatory instability in the first week of life: a systematic review and network meta-analysis. BMJ Paediatr Open 2024; 8:e002500. [PMID: 38769048 PMCID: PMC11110579 DOI: 10.1136/bmjpo-2024-002500] [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: 01/05/2024] [Accepted: 03/12/2024] [Indexed: 05/22/2024] Open
Abstract
BACKGROUND There exists limited agreement on the recommendations for the treatment of transitional circulatory instability (TCI) in preterm neonates OBJECTIVE: To compare the efficacy of various interventions used to treat TCI METHODS: Medline and Embase were searched from inception to 21st July 2023. Two authors extracted the data independently. A Bayesian random effects network meta-analysis was used. Recommendations were formulated using the Grading of Recommendations, Assessment, Development, and Evaluations (GRADE) framework. INTERVENTIONS Dopamine, dobutamine, epinephrine, hydrocortisone, vasopressin, milrinone, volume and placebo. MAIN OUTCOME MEASURES Mortality, major brain injury (MBI) (intraventricular haemorrhage > grade 2 or cystic periventricular leukomalacia), necrotising enterocolitis (NEC) ≥stage 2 and treatment response (as defined by the author). RESULTS 15 Randomized Controlled Trials (RCTs) were included from the 1365 titles and abstracts screened. Clinical benefit or harm could not be ruled out for the critical outcome of mortality. For the outcome of MBI, epinephrine possibly decreased the risk when compared to dobutamine and milrinone (very low certainty). Epinephrine was possibly associated with a lesser risk of NEC when compared with dopamine, dobutamine, hydrocortisone and milrinone (very low certainty). Dopamine was possibly associated with a lesser risk of NEC when compared with dobutamine (very low certainty). Vasopressin possibly decreased the risk of NEC compared with dopamine, dobutamine, hydrocortisone and milrinone (very low certainty). Clinical benefit or harm could not be ruled out for the outcome response to treatment. CONCLUSIONS Epinephrine may be used as the first-line drug in preterm neonates with TCI, the evidence certainty being very low. We suggest future trials evaluating the management of TCI with an emphasis on objective criteria to define it.
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Affiliation(s)
| | - Gunjana Kumar
- Neonatology, National Institute of Medical Sciences and Research, Jaipur, Rajasthan, India
| | | | | | - Pradeep Suryawanshi
- Neonatology, Bharati Vidyapeeth University Medical College & Hospital, Pune, Maharashtra, India
| | - Mohit Sahni
- Neonatology, Surat Kids Hospital, Surat, Gujarat, India
| | | | - Deepak Sharma
- Neonatology, National Institute of Medical Sciences and Research, Jaipur, Rajasthan, India
| | - Kiran More
- Neonatology, MRR Children's Hospital, Thane, Maharashtra, India
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Gautam B, Surak A, Campbell SM, Kumar M. Superior Vena Cava Flow in Preterm Infants and Neonatal Outcomes: A Systematic Review. Am J Perinatol 2024; 41:e2356-e2364. [PMID: 37339677 DOI: 10.1055/a-2113-8621] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/22/2023]
Abstract
Superior vena cava (SVC) flow has been considered a surrogate marker of systemic blood flow in neonates. We conducted a systematic review to evaluate the association between low SVC flow recorded during the early neonatal period and neonatal outcomes. We searched the following databases (until December 9, 2020; updated October 21, 2022): PROSPERO, OVID Medline, OVID EMBASE, Cochrane Library (CDSR and Central), Proquest Dissertations and Theses Global, and SCOPUS using controlled vocabulary and key words representing the concepts "superior vena cava" and "flow" and "neonate." Results were exported to COVIDENCE review management software. The search retrieved 593 records after the removal of duplicates, of which 11 studies (nine cohorts) met the inclusion criteria. The majority of the studies included infants born at <30 weeks of gestation. The included studies were assessed as high risk of bias in terms of the incomparability of the study groups, with infants in the low SVC flow group noted to be more immature than those in the normal SVC flow group or subjected to different cointerventions. We did not conduct meta-analyses in view of the significant clinical heterogeneity noted in the included studies. We found little evidence to suggest that SVC flow in the early neonatal period is an independent predictor for adverse clinical outcomes in preterm infants. Included studies were assessed at high risk of bias. We conclude that SVC flow interpretation for prognostication or for making treatment decisions should be restricted to the research setting for now. We highlight the need for strengthened methods in future research studies. KEY POINTS: · We studied whether low SVC flow in the early neonatal period is a marker for adverse outcomes in preterm infants.. · There is insufficient evidence to conclude that low SVC flow is a valid predictor of adverse outcomes.. · There is insufficient evidence to conclude that SVC flow-directed hemodynamic management improves clinical outcomes..
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Affiliation(s)
- Bishal Gautam
- Department of Pediatrics, University of Alberta, Alberta, Canada
- Alberta Health Services, Edmonton, Canada
| | - Aimann Surak
- Department of Pediatrics, University of Alberta, Alberta, Canada
- Alberta Health Services, Edmonton, Canada
| | - Sandra M Campbell
- John W. Scott Health Sciences Library, University of Alberta, Edmonton, Canada
| | - Manoj Kumar
- Department of Pediatrics, University of Alberta, Alberta, Canada
- Alberta Health Services, Edmonton, Canada
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Agakidou E, Chatziioannidis I, Kontou A, Stathopoulou T, Chotas W, Sarafidis K. An Update on Pharmacologic Management of Neonatal Hypotension: When, Why, and Which Medication. CHILDREN (BASEL, SWITZERLAND) 2024; 11:490. [PMID: 38671707 PMCID: PMC11049273 DOI: 10.3390/children11040490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 03/30/2024] [Accepted: 04/15/2024] [Indexed: 04/28/2024]
Abstract
Anti-hypotensive treatment, which includes dopamine, dobutamine, epinephrine, norepinephrine, milrinone, vasopressin, terlipressin, levosimendan, and glucocorticoids, is a long-established intervention in neonates with arterial hypotension (AH). However, there are still gaps in knowledge and issues that need clarification. The main questions and challenges that neonatologists face relate to the reference ranges of arterial blood pressure in presumably healthy neonates in relation to gestational and postnatal age; the arterial blood pressure level that potentially affects perfusion of critical organs; the incorporation of targeted echocardiography and near-infrared spectroscopy for assessing heart function and cerebral perfusion in clinical practice; the indication, timing, and choice of medication for each individual patient; the limited randomized clinical trials in neonates with sometimes conflicting results; and the sparse data regarding the potential effect of early hypotension or anti-hypotensive medications on long-term neurodevelopment. In this review, after a short review of AH definitions used in neonates and existing data on pathophysiology of AH, we discuss currently available data on pharmacokinetic and hemodynamic effects, as well as the effectiveness and safety of anti-hypotensive medications in neonates. In addition, data on the comparisons between anti-hypotensive medications and current suggestions for the main indications of each medication are discussed.
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Affiliation(s)
- Eleni Agakidou
- 1st Department of Neonatology and Neonatal Intensive Care, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Ippokrateion General Hospital, 54642 Thessaloniki, Greece; (I.C.); (A.K.); (T.S.); (K.S.)
| | - Ilias Chatziioannidis
- 1st Department of Neonatology and Neonatal Intensive Care, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Ippokrateion General Hospital, 54642 Thessaloniki, Greece; (I.C.); (A.K.); (T.S.); (K.S.)
| | - Angeliki Kontou
- 1st Department of Neonatology and Neonatal Intensive Care, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Ippokrateion General Hospital, 54642 Thessaloniki, Greece; (I.C.); (A.K.); (T.S.); (K.S.)
| | - Theodora Stathopoulou
- 1st Department of Neonatology and Neonatal Intensive Care, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Ippokrateion General Hospital, 54642 Thessaloniki, Greece; (I.C.); (A.K.); (T.S.); (K.S.)
| | - William Chotas
- Department of Neonatology, University of Vermont, Burlington, VT 05405, USA
| | - Kosmas Sarafidis
- 1st Department of Neonatology and Neonatal Intensive Care, Faculty of Medicine, School of Health Sciences, Aristotle University of Thessaloniki, Ippokrateion General Hospital, 54642 Thessaloniki, Greece; (I.C.); (A.K.); (T.S.); (K.S.)
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Bravo MC, Jiménez R, Parrado-Hernández E, Fernández JJ, Pellicer A. Predicting the effectiveness of drugs used for treating cardiovascular conditions in newborn infants. Pediatr Res 2024; 95:1124-1131. [PMID: 38092963 DOI: 10.1038/s41390-023-02964-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 09/08/2023] [Accepted: 11/27/2023] [Indexed: 03/09/2024]
Abstract
BACKGROUND Cardiovascular support (CVS) treatment failure (TF) is associated with a poor prognosis in preterm infants. METHODS Medical charts of infants with a birth weight <1500 g who received either dopamine (Dp) or dobutamine (Db), were reviewed. Treatment response (TR) occurred if blood pressure increased >3rd centile for gestational age or superior vena cava flow was maintained >55 ml/kg/min, with decreased lactate or less negative base excess, without additional CVS. A predictive model of Dp and Db on TR was designed and the impact of TR on survival was analyzed. RESULTS Sixty-six infants (median gestational age 27.3 weeks, median birth weight 864 g) received Dp (n = 44) or Db (n = 22). TR occurred in 59% of the cases treated with Dp and 31% with Db, p = 0.04. Machine learning identified a model that correctly labeled Db response in 90% of the cases and Dp response in 61.4%. Sixteen infants died (9% of the TR group, 39% of the TF group; p = 0.004). Brain or gut morbidity-free survival was observed in 52% vs 30% in the TR and TF groups, respectively (p = 0.08). CONCLUSIONS New predictive models can anticipate Db but not Dp effectiveness in preterm infants. These algorithms may help the clinicians in the decision-making process. IMPACT Failure of cardiovascular support treatment increases the risk of mortality in very low birth weight infants. A predictive model built with machine learning techniques can help anticipate treatment response to dobutamine with high accuracy. Predictive models based on artificial intelligence may guide the clinicians in the decision-making process.
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Affiliation(s)
- María Carmen Bravo
- Department of Neonatology, La Paz University Hospital and IdiPaz (La Paz Hospital Institute for Health Research), Madrid, Spain.
| | - Raquel Jiménez
- Department of Neonatology, La Paz University Hospital and IdiPaz (La Paz Hospital Institute for Health Research), Madrid, Spain
- Department of Signal Theory and Communications, Carlos III University, Madrid, Spain
| | | | | | - Adelina Pellicer
- Department of Neonatology, La Paz University Hospital and IdiPaz (La Paz Hospital Institute for Health Research), Madrid, Spain
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Ishiguro A, Kabe K. Effects of Catecholamines on Blood Flow in Preterm Infants: A Subanalysis of PICC-MBF Trial. Neonatology 2023; 120:673-680. [PMID: 37660690 DOI: 10.1159/000532017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2023] [Accepted: 07/06/2023] [Indexed: 09/05/2023]
Abstract
INTRODUCTION This study evaluated the correlation between skin blood flow and systemic blood flow and whether skin blood flow can determine the circulatory effects of dopamine and dobutamine on blood flow in very low birth weight (VLBW) infants. METHODS This study was a subanalysis of the PICC-MBF randomized controlled trial. The correlation between skin blood flow and echocardiographic findings was examined. Changes in skin blood flow and blood pressure before and after initiation or dose increase of dopamine and dobutamine were also evaluated. RESULTS Two hundred and thirty-four participants underwent echocardiography. Skin blood flow was significantly correlated with supra vena cava (SVC) flow (r = 0.31, p < 0.001). Receiver operator characteristic analysis revealed that skin blood flow <17 mL/min effectively detected SVC flow <41 mL/min (area under the curve = 0.83, p < 0.001). Dobutamine significantly increased skin blood flow after initiation or dose increase (p = 0.033) without increasing blood pressure. However, dopamine significantly increased both skin blood flow (p = 0.010) and blood pressure (p < 0.001). CONCLUSIONS Our findings indicated that skin blood flow could be used as a surrogate marker of systemic blood flow in VLBW infants and revealed differences in the effects of dopamine and dobutamine on circulation.
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Affiliation(s)
- Akio Ishiguro
- Division of Neonatal Medicine, Center for Maternal, Fetal and Neonatal Medicine, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
| | - Kazuhiko Kabe
- Division of Neonatal Medicine, Center for Maternal, Fetal and Neonatal Medicine, Saitama Medical Center, Saitama Medical University, Kawagoe, Japan
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Weisz DE, Aldana-Aguirre J, Deshpande P, Jain A. Reply. J Pediatr 2022; 240:315-316. [PMID: 34555377 DOI: 10.1016/j.jpeds.2021.09.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 09/15/2021] [Indexed: 11/25/2022]
Affiliation(s)
- Dany E Weisz
- Department of Pediatrics, University of Toronto, Toronto, Canada; Newborn and Developmental Pediatrics, Sunnybrook Health Sciences Centre, Toronto, Canada
| | | | - Poorva Deshpande
- Department of Pediatrics, University of Toronto, Toronto, Canada; Department of Pediatrics, Mount Sinai Hospital, Toronto, Canada
| | - Amish Jain
- Department of Pediatrics, University of Toronto, Toronto, Canada; Department of Pediatrics, Mount Sinai Hospital, Toronto, Canada
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Pavlek LR, Rivera BK, Smith CV, Randle J, Hanlon C, Small K, Bell EF, Rysavy MA, Conroy S, Backes CH. Eligibility Criteria and Representativeness of Randomized Clinical Trials That Include Infants Born Extremely Premature: A Systematic Review. J Pediatr 2021; 235:63-74.e12. [PMID: 33894262 PMCID: PMC9348995 DOI: 10.1016/j.jpeds.2021.04.028] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2021] [Revised: 03/23/2021] [Accepted: 04/15/2021] [Indexed: 02/08/2023]
Abstract
OBJECTIVE To assess the eligibility criteria and trial characteristics among contemporary (2010-2019) randomized clinical trials (RCTs) that included infants born extremely preterm (<28 weeks of gestation) and to evaluate whether eligibility criteria result in underrepresentation of high-risk subgroups (eg, infants born at <24 weeks of gestation). STUDY DESIGN PubMed and Scopus were searched January 1, 2010, to December 31, 2019, with no language restrictions. RCTs with mean or median gestational ages at birth of <28 weeks of gestation were included. The study followed the PRISMA guidelines; outcomes were registered prospectively. Data extraction was performed independently by multiple observers. Study quality was evaluated using a modified Jadad scale. RESULTS Among RCTs (n = 201), 32 552 infants were included. Study participant characteristics, interventions, and outcomes were highly variable. A total of 1603 eligibility criteria were identified; rationales were provided for 18.8% (n = 301) of criteria. Fifty-five RCTs (27.4%) included infants <24 weeks of gestation; 454 (1.4%) infants were identified as <24 weeks of gestation. CONCLUSIONS The present study identifies sources of variability across RCTs that included infants born extremely preterm and reinforces the critical need for consistent and transparent policies governing eligibility criteria.
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Affiliation(s)
- Leeann R. Pavlek
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children’s Hospital,Department of Pediatrics and The Ohio State University Wexner Medical Center, Columbus, OH
| | - Brian K. Rivera
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children’s Hospital
| | - Charles V. Smith
- Center for Integrated Brain Research, Seattle Children’s Research Institute, Seattle, WA
| | - Joanie Randle
- Ohio Perinatal Research Network at Nationwide Children’s Hospital, Columbus, OH
| | - Cory Hanlon
- Ohio Perinatal Research Network at Nationwide Children’s Hospital, Columbus, OH
| | - Kristi Small
- Ohio Perinatal Research Network at Nationwide Children’s Hospital, Columbus, OH
| | - Edward F. Bell
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA
| | - Matthew A. Rysavy
- Stead Family Department of Pediatrics, University of Iowa, Iowa City, IA
| | - Sara Conroy
- Center for Biostatistics, Department of Biomedical Informatics, The Ohio State University,Biostatistics Resource at Nationwide Children’s Hospital
| | - Carl H. Backes
- Center for Perinatal Research, The Abigail Wexner Research Institute at Nationwide Children’s Hospital,Department of Pediatrics and The Ohio State University Wexner Medical Center, Columbus, OH,Ohio Perinatal Research Network at Nationwide Children’s Hospital, Columbus, OH,Obstetrics and Gynecology, The Ohio State University Wexner Medical Center,The Heart Center, Nationwide Children’s Hospital, Columbus, OH
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Bischoff AR, Giesinger RE, Stanford AH, Ashwath R, McNamara PJ. Assessment of superior vena cava flow and cardiac output in different patterns of patent ductus arteriosus shunt. Echocardiography 2021; 38:1524-1533. [PMID: 34309068 DOI: 10.1111/echo.15163] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 06/07/2021] [Accepted: 07/09/2021] [Indexed: 12/01/2022] Open
Abstract
BACKGROUND Despite the widespread use of superior vena cava (SVC) flow as a marker of systemic blood flow from the upper body, no previous studies have systematically evaluated the correlation between SVC flow and other echocardiography measures of systemic blood flow in the context of different patterns of patent ductus arteriosus (PDA) shunt direction METHODS: A retrospective cohort study of preterm infants (< 30 weeks, < 21 days of life) who underwent comprehensive targeted neonatal echocardiography (TnECHO) was performed. Patients were categorized as follows: (i) Hemodynamically significant left-to-right shunt; (ii): Bidirectional shunt; (iii) No PDA or insignificant shunt. SVC flow, as measured by two distinct methods, was compared to left and right ventricular outputs (LVO and RVO). Intra- and inter-observer reliability testing was performed RESULTS: In total, 45 patients were included (15 in each group) with a median [IQR] weight of 720 [539, 917] grams at the time of assessment. SVC dimensions and flow measurements were not different between the groups, although patients with left-to-right shunt had higher LVO/RVO ratio. SVC flow, as estimated using the modified method, had a strong correlation with LVO (r = .63, p = 0.012) and RVO (r = .635, p = 0.011) in patients with no PDA. Inter- and intra-observer reliability were both stronger for LVO and RVO when compared to SVC flow measurements CONCLUSION: SVC flow was comparable across all three groups irrespective of higher LVO and LVO/RVO ratio in patients with left-to-right shunts. This may reflect poor measurement reliability or compensation for left-to-right ductal shunt by increased LVO to maintain systemic perfusion.
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Affiliation(s)
| | - Regan E Giesinger
- Division of Neonatology, Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA
| | - Amy H Stanford
- Division of Neonatology, Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA
| | - Ravi Ashwath
- Division of Pediatric Cardiology, Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA
| | - Patrick J McNamara
- Division of Neonatology, Department of Pediatrics, University of Iowa, Iowa City, Iowa, USA.,Department of Internal Medicine, University of Iowa, Iowa City, Iowa, USA
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Dempsey EM, Barrington KJ, Marlow N, O'Donnell CPF, Miletin J, Naulaers G, Cheung PY, Corcoran JD, EL-Khuffash AF, Boylan GB, Livingstone V, Pons G, Macko J, Van Laere D, Wiedermannova H, Straňák Z. Hypotension in Preterm Infants (HIP) randomised trial. Arch Dis Child Fetal Neonatal Ed 2021; 106:398-403. [PMID: 33627329 PMCID: PMC8237176 DOI: 10.1136/archdischild-2020-320241] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2020] [Revised: 11/02/2020] [Accepted: 12/06/2020] [Indexed: 11/12/2022]
Abstract
OBJECTIVE To determine whether restricting the use of inotrope after diagnosis of low blood pressure (BP) in the first 72 hours of life affects survival without significant brain injury at 36 weeks of postmenstrual age (PMA) in infants born before 28 weeks of gestation. DESIGN Double-blind, placebo-controlled randomised trial. Caregivers were masked to group assignment. SETTING 10 sites across Europe and Canada. PARTICIPANTS Infants born before 28 weeks of gestation were eligible if they had an invasive mean BP less than their gestational age that persisted for ≥15 min in the first 72 hours of life and a cerebral ultrasound free of significant (≥ grade 3) intraventricular haemorrhage. INTERVENTION Participants were randomly assigned to saline bolus followed by either a dopamine infusion (standard management) or placebo (5% dextrose) infusion (restrictive management). PRIMARY OUTCOME Survival to 36 weeks of PMA without severe brain injury. RESULTS The trial terminated early due to significant enrolment issues (7.7% of planned recruitment). 58 infants were enrolled between February 2015 and September 2017. The two groups were well matched for baseline variables. In the standard group, 18/29 (62%) achieved the primary outcome compared with 20/29 (69%) in the restrictive group (p=0.58). Additional treatments for low BP were used less frequently in the standard arm (11/29 (38%) vs 19/29 (66%), p=0.038). CONCLUSION Though this study lacked power, we did not detect major differences in clinical outcomes between standard or restrictive approach to treatment. These results will inform future studies in this area. TRIAL REGISTRATION NUMBER NCT01482559, EudraCT 2010-023988-17.
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Affiliation(s)
- Eugene M Dempsey
- Department of Paediatric and Child Health and INFANT Research Centre, University College Cork, Cork, Ireland
| | - Keith J Barrington
- Néonatologie, Centre Hospitalier Universitaire Sainte Justine, Montreal, Quebec, Canada
| | - Neil Marlow
- Institute for Womens Health, University College London, London, UK
| | | | - Jan Miletin
- Paediatric and Newborn Medicine, Coombe Women and Infants University Hospital, Dublin, Ireland
| | - Gunnar Naulaers
- Neonatology, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Po-Yin Cheung
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - John David Corcoran
- Faculty of Medicine and Health Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Afif Faisal EL-Khuffash
- Faculty of Medicine and Health Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Geraldine B Boylan
- Department of Paediatric and Child Health and INFANT Research Centre, University College Cork, Cork, Ireland
| | - Vicki Livingstone
- Department of Paediatric and Child Health and INFANT Research Centre, University College Cork, Cork, Ireland
| | - Gerard Pons
- Clinical Pharmacology, Groupe Hospitalier Cochin-Broca, Hôtel Dieu, AP-HP, Paris, France
| | - Jozef Macko
- Department of Neonatology, Tomas Bata University in Zlin, Zlin, Zlínský Kraj, Czech Republic
| | | | - Hana Wiedermannova
- Department of Pediatrics and Neonatal Care, Ostravska Univerzita, Ostrava, Moravskoslezský, Czech Republic
| | - Zbyněk Straňák
- Institute for the Care of Mother and Child, Third Faculty of Medicine, Charles University, Prague, Czech Republic
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Bravo MC, López-Ortego P, Sánchez L, Díez J, Cabañas F, Pellicer A. Randomised trial of dobutamine versus placebo for low superior vena cava flow in preterm infants: Long-term neurodevelopmental outcome. J Paediatr Child Health 2021; 57:872-876. [PMID: 33464688 DOI: 10.1111/jpc.15344] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 12/30/2020] [Accepted: 12/31/2020] [Indexed: 11/29/2022]
Abstract
AIM Although circulatory impairment during the transitional circulation associates morbidity and mortality, its treatment remains controversial. In a pilot trial on circulatory impairment defined as low superior vena cava (SVC) flow, dobutamine (Db) versus placebo (PL) showed a trend towards improved short-term outcomes. The purpose of this study was to report on the long-term outcome of the infants who were observed for SVC flow patterns. METHODS Among the 126 infants <31 weeks of gestation prospectively scanned from birth, 28 presented low SVC flow within the first 24 h after birth and received Db (n = 16) or PL (n = 12). Follow-up of survivors included motor assessment and Bayley Scales II or III at 2 years, and the Reynolds Intellectual Assessment Scale at 6 years. Neurodevelopmental impairment (NDI) was defined as: cerebral palsy (Gross Motor Function Classification System ≥ level 2), or a cognitive function score < -2 standard deviations; or moderate or severe hearing or visual impairment. Db group, PL group and normal-flow group were compared. RESULTS Eighteen infants died (Db: 5; PL: 2; normal flow group: 11, P = 0.1). Follow-up in survivors was accomplished in 80% and 55% of the cohort at 2 years and 6 years, respectively. No significant difference in the combined outcome (mortality or NDI) was found between the groups (42% Db, 36% PL, 30% normal flow group). CONCLUSIONS This exploratory analysis did not show any differences in the long-term outcome of infants according to SVC flow patterns or its treatment early after birth.
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Affiliation(s)
| | | | - Laura Sánchez
- Department of Neonatology, Hospital Universitario La Paz, Madrid, Spain
| | - Jesús Díez
- Division of Statistics, Hospital Universitario La Paz, Madrid, Spain
| | - Fernando Cabañas
- Department of Pediatrics and Neonatology, Quironsalud Madrid University Hospital & Quironsalud San José Hospital, E-28223 Madrid, Spain
| | - Adelina Pellicer
- Department of Neonatology, Hospital Universitario La Paz, Madrid, Spain
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13
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Pharmacokinetic study (phase I-II) of a new dobutamine formulation in preterm infants immediately after birth. Pediatr Res 2021; 89:981-986. [PMID: 32610341 DOI: 10.1038/s41390-020-1009-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Revised: 05/22/2020] [Accepted: 06/02/2020] [Indexed: 11/08/2022]
Abstract
BACKGROUND Dobutamine is particularly suited to treatment of haemodynamic insufficiency caused by increased peripheral vascular resistance and myocardial dysfunction in the preterm infant. Knowledge of the elimination half-life is essential to estimate the steady state when its efficacy/safety can be evaluated. METHODS Analysis of pharmacokinetic data in ten preterm newborns treated with a new neonatal formulation of dobutamine (IMP) after screening for haemodynamic insufficiency within the first 72 h from birth. Blood samples were withdrawn at the end of IMP infusion and at a random time after the end of infusion (5 min, 15 min, 45 min, 2 h and 6 h). IMP concentration in each sample was measured by ultra-high performance liquid chromatography with electrochemical detection. RESULTS Median duration of IMP infusion was 37.7 h (IQR 21.2). Calculated IMP half-life ranged between 3.06 and 36.1 min (median 10.6 min), leading to a time to reach the steady-state concentration between 15 min and >2 h. Adverse events were not related to IMP. CONCLUSIONS The wide variability in dobutamine metabolism in preterm infants requires awareness about the risk of under- or overtreatment. A delay of up to 3 h might be required before drawing blood samples to evaluate the effective dose. IMPACT Small trials suggest dobutamine as the optimal drug in the preterm infant with haemodynamic insufficiency after birth. Age-related differences in drug pharmacokinetics may result in suboptimal treatments. The lack of formal studies in preterms results in inadequate data on efficacy and safety. This study provides data on the variability of the elimination half-life of dobutamine in the very preterm infant during transitional circulation. There is a wide variation in the time to reach the plasma concentration corresponding to steady state, the moment when its efficacy/safety can be reliably evaluated. This information is crucial for planning future trials on cardiovascular support.
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14
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Wu TW, Noori S. Recognition and management of neonatal hemodynamic compromise. Pediatr Neonatol 2021; 62 Suppl 1:S22-S29. [PMID: 33485823 DOI: 10.1016/j.pedneo.2020.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2020] [Accepted: 12/09/2020] [Indexed: 01/22/2023] Open
Abstract
Hemodynamic compromise of the neonate can occur in various clinical situations, including but not limited to maladaptation during the early transitional period, sepsis, congenital heart anomalies, hemodynamically significant patent ductus arteriosus, persistent pulmonary hypertension of the newborn, systemic inflammatory diseases such as necrotizing enterocolitis, and dehydration. Despite the handful of advances in neonatal care through ground-breaking clinical trials, the management of neonatal shock is often dependent on the bedside clinician's experience and training without the aid of high-level evidence. However, the recognition for the importance of comprehensive and serial hemodynamic assessment is growing. There is now a wealth of literature investigating the use of functional echocardiography, near-infrared spectroscopy, and noninvasive impedance-based cardiometry to complement common bedside hemodynamic measures such as blood pressure and heart rate measurement. In this review article, the pathophysiology of neonatal hemodynamic compromise is outlined, and concomitant best-evidence management for hemodynamic compromise in the neonate is proposed.
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Affiliation(s)
- Tai-Wei Wu
- Fetal and Neonatal Institute, Division of Neonatology, Children's Hospital Los Angeles, Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Shahab Noori
- Fetal and Neonatal Institute, Division of Neonatology, Children's Hospital Los Angeles, Department of Pediatrics, Keck School of Medicine, University of Southern California, Los Angeles, CA, USA.
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15
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Miletin J, Stranak Z, Ó Catháin N, Janota J, Semberova J. Comparison of Two Techniques of Superior Vena Cava Flow Measurement in Preterm Infants With Birth Weight <1,250 g in the Transitional Period-Prospective Observational Cohort Study. Front Pediatr 2021; 9:661698. [PMID: 33898366 PMCID: PMC8058217 DOI: 10.3389/fped.2021.661698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2021] [Accepted: 03/09/2021] [Indexed: 11/26/2022] Open
Abstract
Objectives: Superior Vena Cava (SVC) flow in neonates measured by the standard approach has been validated by different groups around the world. The modified SVC flow measurement technique was recently suggested. The aim of our study was to evaluate standard and modified technique of echocardiography SVC flow measurement in a cohort of extremely preterm neonates in the immediate postnatal period. Methods: Prospective, observational cohort study in a level III neonatal center. Infants with birth weight <1,250 g were eligible for enrolment. SVC flow was measured by echocardiography using standard and modified methods at 6, 18 and 36 h of age. Our primary outcome was equivalency (using raw bounds of -20 to +20 mL/kg/min difference between the paired measurements), agreement and correlation between standard and modified methods of the SVC flow measurements. Results: Thirty-nine infants were enrolled. The mean gestational age of the cohort was 27.4 (SD 2.1) weeks of postmenstrual age, the mean birth weight was 0.95 kg (SD 0.2). The measurements at 6 and 36 h of age were equivalent as defined in the design of the study (p = 0.003 and p = 0.004 respectively; raw bounds -20 to +20 mL/kg/min). At 6 h of age the mean difference (bias) between the measurements was -0.8 mL/kg/min with 95% limits of agreement -65.0 to 63.4 mL/kg/min. At 18 h of age, the mean difference (bias) between the measurements was +9.5 mL/kg/min, with 95% limits of agreement -79.6 to 98.7 mL/kg/min. At 36 h of age the mean difference (bias) between the measurements was -2.2 mL/kg/min with 95% limits of agreement -73.4 to 69.1 mL/kg/min. There was a weak, but statistically significant correlation between the standard and modified method at 6 h of age (r = 0.39, p = 0.04). Conclusion: Both SVC flow echocardiography measurement techniques yielded clinically equivalent results, however due to wide limits of agreement and poor correlation they do not seem to be interchangeable.
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Affiliation(s)
- Jan Miletin
- Coombe Women and Infants University Hospital, Dublin, Ireland.,Institute for the Care of Mother and Child, Prague, Czechia.,UCD School of Medicine, University College Dublin, Dublin, Ireland.,3rd Faculty of Medicine, Charles University, Prague, Czechia
| | - Zbynek Stranak
- Institute for the Care of Mother and Child, Prague, Czechia.,3rd Faculty of Medicine, Charles University, Prague, Czechia
| | - Niamh Ó Catháin
- Coombe Women and Infants University Hospital, Dublin, Ireland.,UCD School of Medicine, University College Dublin, Dublin, Ireland
| | - Jan Janota
- 1st and 2nd Faculty of Medicine, Charles University, Prague, Czechia.,Motol University Hospital, Prague, Czechia
| | - Jana Semberova
- Coombe Women and Infants University Hospital, Dublin, Ireland.,Institute for the Care of Mother and Child, Prague, Czechia.,UCD School of Medicine, University College Dublin, Dublin, Ireland
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16
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Carrel T. Commentary: Vis a tergo—a push from behind—is of paramount importance for the optimal function of a bidirectional cavopulmonary shunt. J Thorac Cardiovasc Surg 2020; 160:1541-1542. [DOI: 10.1016/j.jtcvs.2020.04.128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Revised: 04/26/2020] [Accepted: 04/27/2020] [Indexed: 10/24/2022]
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17
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de Waal K, Kluckow M. Superior vena cava flow: Role, assessment and controversies in the management of perinatal perfusion. Semin Fetal Neonatal Med 2020; 25:101122. [PMID: 32467039 DOI: 10.1016/j.siny.2020.101122] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The superior vena cava (SVC) is a large vein responsible for the venous return of blood from structures located superior to the diaphragm. The flow in the SVC can be assessed with Doppler ultrasound and can be used as a proxy for cerebral perfusion. Early clinical research studies showed that low SVC flow, particularly if for a prolonged period, was associated with short term morbidity such as intraventricular hemorrhage, mortality, and poorer neurodevelopmental outcomes. However, these findings have not been consistently reported in more recent studies, and the role of SVC flow in early management and as a predictor of poor long-term neurodevelopment has been questioned. This paper provides an overview of SVC assessment, the expected range of findings, and reviews the role of SVC flow as a diagnostic and monitoring tool for the assessment of perinatal perfusion.
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Affiliation(s)
- Koert de Waal
- John Hunter Children's Hospital Department of Neonatology and University of Newcastle, Newcastle, NSW, Australia.
| | - Martin Kluckow
- Royal North Shore Hospital Department of Neonatology and University of Sydney, Sydney, NSW, Australia
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18
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Abstract
Primary function of cardiovascular system is to meet body's metabolic demands. The aim of inotrope therapy is to minimise adverse impact of cardiovascular compromise. Current use of inotropes is primarily guided by the pathophysiology of cardiovascular compromise and anticipated actions of inotropes. Lack of significant reduction in morbidity and mortality associated with cardiovascular compromise despite inotrope use, highlights major gaps in our understanding of circulatory targets, thresholds and choices of inotrope therapy. Thus far, prevention of cardiovascular compromise remains the most effective strategy to optimize outcomes. Studies of alternative design are needed for further advancement in cardiovascular therapy in neonates.
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Affiliation(s)
- Nilkant Phad
- Department of Neonatology, John Hunter Children's Hospital, Lookout Road, New Lambton Heights, New South Wales 2305, Australia; University of Newcastle, Newcastle, Australia.
| | - Koert de Waal
- Department of Neonatology, John Hunter Children's Hospital, Lookout Road, New Lambton Heights, New South Wales 2305, Australia; University of Newcastle, Newcastle, Australia
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19
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Dempsey E, El-Khuffash A. Clinical Trials in Hemodynamic Support: Past, Present, and Future. Clin Perinatol 2020; 47:641-652. [PMID: 32713455 DOI: 10.1016/j.clp.2020.05.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Managing low blood flow states in the preterm population remains a challenge in neonatal clinical care. The heterogeneity of the trials to date and the relatively low number of infants enrolled, in addition to a desire to oversimplify the underlying pathophysiology, have contributed to an inability to draw meaningful conclusions to direct clinical care. This article reviews the current literature on this topic in the preterm population and outlines the challenges that have been encountered in performing such trials. Alternative studies are proposed, based on the lessons learned over the past number of years.
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Affiliation(s)
- Eugene Dempsey
- Department of Paediatrics and Child Health, INFANT Centre, University College Cork, Wilton, Cork, Ireland.
| | - Afif El-Khuffash
- The Rotunda Hospital, Dublin and Royal College of Surgeons, Dublin, Ireland
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20
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Barrington K, El-Khuffash A, Dempsey E. Intervention and Outcome for Neonatal Hypotension. Clin Perinatol 2020; 47:563-574. [PMID: 32713451 DOI: 10.1016/j.clp.2020.05.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
Many observational studies have shown that infants with blood pressures (BPs) that are in the lower range for their gestational age tend to have increased complications such as an increased rate of significant intraventricular hemorrhage and adverse long-term outcome. This relationship does not prove causation nor should it create an indication for treatment. However, many continue to intervene with medication for low BP on the assumption that an increase in BP will result in improved outcome. Only adequately powered prospective randomized controlled trials can answer the question of whether individual treatments of low BP are beneficial.
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Affiliation(s)
| | - Afif El-Khuffash
- The Rotunda Hospital, Dublin and Royal College of Surgeons, Dublin, Ireland
| | - Eugene Dempsey
- Department of Paediatrics and Child Health, INFANT Centre, University College Cork, Ireland.
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21
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Hallik M, Ilmoja M, Standing JF, Soeorg H, Jalas T, Raidmäe M, Uibo K, Köbas K, Sõnajalg M, Takkis K, Veigure R, Kipper K, Starkopf J, Metsvaht T. Population pharmacokinetics and pharmacodynamics of dobutamine in neonates on the first days of life. Br J Clin Pharmacol 2020; 86:318-328. [PMID: 31657867 PMCID: PMC7015735 DOI: 10.1111/bcp.14146] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Revised: 09/05/2019] [Accepted: 09/26/2019] [Indexed: 11/29/2022] Open
Abstract
AIMS To describe the pharmacokinetics (PK) and concentration-related effects of dobutamine in critically ill neonates in the first days of life, using nonlinear mixed effects modelling. METHODS Dosing, plasma concentration and haemodynamic monitoring data from a dose-escalation study were analysed with a simultaneous population PK and pharmacodynamic model. Neonates receiving continuous infusion of dobutamine 5-20 μg kg-1 min-1 were included. Left ventricular ejection fraction (LVEF) and cardiac output of right and left ventricle (RVO, LVO) were measured on echocardiography; heart rate (HR), mean arterial pressure (MAP), peripheral arterial oxygen saturation and cerebral regional oxygen saturation were recorded from patient monitors. RESULTS Twenty-eight neonates with median (range) gestational age of 30.4 (22.7-41.0) weeks and birth weight (BW) of 1618 (465-4380) g were included. PK data were adequately described by 1-compartmental linear structural model. Dobutamine clearance (CL) was described by allometric scaling on BW with sigmoidal maturation function of postmenstrual age (PMA). The final population PK model parameter mean typical value (standard error) estimates, standardised to median BW of 1618 g, were 41.2 (44.5) L h-1 for CL and 5.29 (0.821) L for volume of distribution, which shared a common between subject variability of 29% (17.2%). The relationship between dobutamine concentration and RVO/LVEF was described by linear model, between concentration and LVO/HR/MAP/cerebral fractional tissue oxygen extraction by sigmoidal Emax model. CONCLUSION In the postnatal transitional period, PK of dobutamine was described by a 1-compartmental linear model, CL related to BW and PMA. A concentration-response relationship with haemodynamic variables has been established.
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Affiliation(s)
- Maarja Hallik
- Department of Anaesthesiology and Intensive Care, Institute of Clinical MedicineUniversity of TartuTartuEstonia
| | | | - Joseph F. Standing
- Inflammation, Infection and Rheumatology section, Great Ormond Street Institute of Child HealthUniversity College LondonLondonUK
| | - Hiie Soeorg
- Department of Microbiology, Institute of Biomedicine and Translational MedicineUniversity of TartuTartuEstonia
| | - Tiiu Jalas
- Clinic of PaediatricsTallinn Children's HospitalTallinnEstonia
| | - Maila Raidmäe
- Clinic of PaediatricsTallinn Children's HospitalTallinnEstonia
| | - Karin Uibo
- Clinic of PaediatricsTallinn Children's HospitalTallinnEstonia
| | - Kristel Köbas
- Clinic of PaediatricsTartu University HospitalTartuEstonia
| | | | - Kalev Takkis
- Analytical Services InternationalSt George's University of LondonCranmer TerraceLondonUK
| | - Rūta Veigure
- Institute of ChemistryUniversity of TartuTartuEstonia
| | - Karin Kipper
- Analytical Services InternationalSt George's University of LondonCranmer TerraceLondonUK
- Institute of ChemistryUniversity of TartuTartuEstonia
| | - Joel Starkopf
- Department of Anaesthesiology and Intensive Care, Institute of Clinical MedicineUniversity of TartuTartuEstonia
- Clinic of Anaesthesiology and Intensive CareTartu University HospitalTartuEstonia
| | - Tuuli Metsvaht
- Clinic of Anaesthesiology and Intensive CareTartu University HospitalTartuEstonia
- Department of Paediatrics, Institute of Clinical MedicineUniversity of TartuTartuEstonia
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22
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Point-of-care ultrasound: Is it time to include it in the paediatric specialist training programme? An Pediatr (Barc) 2019. [DOI: 10.1016/j.anpede.2019.06.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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23
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Mayordomo-Colunga J, González-Cortés R, Bravo MC, Martínez-Mas R, Vázquez-Martínez JL, Renter-Valdovinos L, Conlon TW, Nishisaki A, Cabañas F, Bilbao-Sustacha JÁ, Oulego-Erroz I. [Point-of-care ultrasound: Is it time to include it in the paediatric specialist training program?]. An Pediatr (Barc) 2019; 91:206.e1-206.e13. [PMID: 31395389 DOI: 10.1016/j.anpedi.2019.06.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2019] [Accepted: 06/22/2019] [Indexed: 11/16/2022] Open
Abstract
Point-of-care ultrasound (POCUS) has become an essential tool for clinical practice in recent years. It should be considered as an extension of the standard physical examination, which complements and enriches it without substituting it. POCUS enables the physician to answer specific clinical questions about the diagnosis, to understand better the pathophysiological context, to orientate the treatment, and to perform invasive procedures more safely. Despite its current use in many centres, and in most paediatric sub-specialties, there are currently no specific recommendations addressing educational aims in the different training areas, as well as methodology practice and the certification process in paediatrics. These ingredients are essential for POCUS implementation in daily practice, with a quality guarantee in terms of efficiency and safety. Several POCUS experts in different paediatric medicine environments performed a non-systematic review addressing the main paediatric POCUS applications in paediatrics. The lack of educational programs in POCUS in Spain is also discussed, and the experience in the United States of America in this topic is provided. Considering the current situation of POCUS in paediatrics, we strongly believe that it is urgent to establish evidence-based recommendations for POCUS training that should be the base to develop educational programs and to include POCUS in the paediatric residency training.
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Affiliation(s)
- Juan Mayordomo-Colunga
- Sección de Cuidados Intensivos Pediátricos, Área de Gestión Clínica de Pediatría, Hospital Universitario Central de Asturias, Oviedo, España; CIBER-Enfermedades Respiratorias, Instituto de Salud Carlos III, Madrid, España; Grupo de Trabajo de Ecografía de la Sociedad Española de Cuidados Intensivos Pediátricos (SECIP), España; Instituto de Investigación Sanitaria del Principado de Asturias, Oviedo, España
| | - Rafael González-Cortés
- Unidad de Cuidados Intensivos Pediátricos, Hospital General Universitario Gregorio Marañón, Madrid, España; Red de Salud Materno Infantil y del Desarrollo. RETICS financiada por el ISCIII (Ref. 16/0022), Madrid, España; Grupo de Trabajo de Ecografía de la Sociedad Española de Cuidados Intensivos Pediátricos (SECIP), España
| | - María Carmen Bravo
- Departamento de Neonatología, Hospital Universitario La Paz, Madrid, España
| | - Roser Martínez-Mas
- Servicio de Urgencias de Pediatría, Hospital Universitario Cruces, Barakaldo, Vizcaya, España; Grupo de Trabajo de Ecografía a Pie de Cama de la Sociedad Española de Urgencias Pediátricas (SEUP), España
| | - José Luis Vázquez-Martínez
- Unidad de Cuidados Intensivos Pediátricos, Hospital Universitario Ramón y Cajal, Madrid, España; Grupo de Trabajo de Ecografía de la Sociedad Española de Cuidados Intensivos Pediátricos (SECIP), España
| | - Luis Renter-Valdovinos
- Unidad de Cuidados Intensivos Pediátricos, Servicio de Medicina Pediátrica, Parc Taulí, Hospital Universitario, Sabadell, Barcelona, España; Unidad de Transporte Pediátrico, Hospital Universitario Vall d'Hebron, Universitat Autònoma de Barcelona, Barcelona, España; Base SEM-Pediátrico BP61, Sistema de Emergencias Médicas de Catalunya (SEM), Barcelona, España; Grupo de Trabajo de Ecografía de la Sociedad Española de Cuidados Intensivos Pediátricos (SECIP), España
| | - Thomas W Conlon
- Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Filadelfia, Pensilvania, Estados Unidos
| | - Akira Nishisaki
- Department of Anesthesiology and Critical Care Medicine, Children's Hospital of Philadelphia and Perelman School of Medicine, University of Pennsylvania, Filadelfia, Pensilvania, Estados Unidos
| | - Fernando Cabañas
- Departamento de Pediatría y Neonatología, Hospital Universitario Quironsalud, Madrid, España; Fundación de Investigación Biomédica, Hospital Universitario La Paz, Madrid, España
| | - José Ángel Bilbao-Sustacha
- Área Básica de Salud de Riudoms, Riudoms, Tarragona, España; Grupo de Trabajo de Ecografía Clínica de la Asociación Española de Pediatría de Atención Primaria (AEPAP), España
| | - Ignacio Oulego-Erroz
- Cardiología Infantil, Unidad de Cuidados Intensivos Pediátricos, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España; IBIOMED, Instituto de Biomedicina de León, León, España; Grupo de Trabajo de Ecografía de la Sociedad Española de Cuidados Intensivos Pediátricos (SECIP), España.
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Abstract
There is a distinct lack of age-appropriate cardiotonic drugs, and adult derived formulations continue to be administered, without evidence-based knowledge on their dosing, safety, efficacy, and long-term effects. Dopamine remains the most commonly studied and prescribed cardiotonic drug in the neonatal intensive care unit (NICU), but evidence of its effect on endorgan perfusion still remains. Unlike adult and pediatric critical care, there are significant gaps in our knowledge on the use of various cardiotonic drugs in various forms of circulatory failure in the NICU.
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Affiliation(s)
- Eugene Dempsey
- Department of Paediatrics and Child Health, Neonatal Intensive Care Unit, University College Cork, Wilton, Cork, Ireland; Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland.
| | - Heike Rabe
- Brighton and Sussex Medical School, University of Sussex, Brighton, UK; Department of Neonatology, Brighton & Sussex University Hospitals NHS Trust, Brighton, UK
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25
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Bravo MC, López-Ortego P, Sánchez L, Madero R, Cabañas F, Koch A, Rojas-Anaya H, Rabe H, Pellicer A. Validity of Biomarkers of Early Circulatory Impairment to Predict Outcome: A Retrospective Analysis. Front Pediatr 2019; 7:212. [PMID: 31192178 PMCID: PMC6548875 DOI: 10.3389/fped.2019.00212] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Accepted: 05/10/2019] [Indexed: 11/13/2022] Open
Abstract
Objectives: The definition of circulatory impairment in the premature infant is controversial. Current research suggests overdiagnosis and overtreatment. We aimed to analyse which biomarkers move clinicians to initiate cardiovascular treatment (CVT). The prognostic capacity for adverse outcome (death and/or moderate-severe brain damage by cranial ultrasound at term equivalent) of these biomarkers was evaluated. Study Design: Retrospective data analysis from preterm infants enrolled in a placebo-controlled trial on dobutamine for low superior vena cava (SVC) flow, who showed normal SVC flow within the first 24 h (not randomized). Five positive biomarkers were considered: MABP < gestational age (GA)-1 mmHg; MABP < GA-5 mmHg; lactate > 4 mmol/L; BE < -9 mmol/L; SVC flow <51 ml/kg/min. Results: Ninety eight infants formed the study cohort. Thirty six received CVT (2-95 h). Logistic regression models adjusted for gestational age showed a positive association between CVT and the risk of death or moderate-severe abnormal cranial ultrasound at term equivalent [(OR 5.2, 95%CI: 1.8-15.1) p = 0.002]. MABP < GA-1 mmHg and lactate > 4 mmol/L were the most prevalent biomarkers at start of treatment. Low BE, high serum lactate and low SVC flow at first echocardiography showed a trend toward being associated with adverse outcome, although not statistically significant. Conclusions: Low blood pressure and high lactate are the most prevalent biomarkers used for CVT prescription. Lactic acidosis and low SVC flow early after birth showed a trend toward being associated with adverse outcome. These findings support using a combination of biomarkers for inclusion in a placebo-controlled trial on CVT during transitional circulation.
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Affiliation(s)
| | | | - Laura Sánchez
- Department of Neonatology, La Paz University Hospital, Madrid, Spain
| | - Rosario Madero
- Division of Statistics, La Paz University Hospital, Madrid, Spain
| | - Fernando Cabañas
- Department of Neonatology, La Paz University Hospital, Madrid, Spain.,Department of Pediatrics and Neonatology, Quironsalud Madrid University Hospital, Madrid, Spain
| | - Armin Koch
- Medizinische Hochschule Hannover, Institut für Biometrie, Hannover, Germany
| | - Héctor Rojas-Anaya
- Academic Department of Paediatrics, Brighton and Sussex Medical School, Brighton, United Kingdom
| | - Heike Rabe
- Academic Department of Paediatrics, Brighton and Sussex Medical School, Brighton, United Kingdom
| | - Adelina Pellicer
- Department of Neonatology, La Paz University Hospital, Madrid, Spain
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Oulego Erroz I, Alonso Quintela P, Jiménez Gonzalez A, Terroba Seara S, Rodríguez Blanco S, Rosón Varas M, Castañón López L. Impact of screening and treatment of low systemic blood flow in the prevention of severe intraventricular haemorrhage and/or death in pre-term infants. ANALES DE PEDIATRÍA (ENGLISH EDITION) 2018. [DOI: 10.1016/j.anpede.2018.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Dobutamine treatment reduces inflammation in the preterm fetal sheep brain exposed to acute hypoxia. Pediatr Res 2018; 84:442-450. [PMID: 29976968 DOI: 10.1038/s41390-018-0045-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 04/20/2018] [Accepted: 04/23/2018] [Indexed: 02/06/2023]
Abstract
BACKGROUND Impaired cerebral autoregulation in preterm infants makes circulatory management important to avoid cerebral hypoxic-ischemic injury. Dobutamine is frequently used as inotropic treatment in preterm neonates, but its effects on the brain exposed to cerebral hypoxia are unknown. We hypothesized that dobutamine would protect the immature brain from cerebral hypoxic injury. METHODS In preterm (0.6 gestation) fetal sheep, dobutamine (Dob, 10 μg/kg/min) or saline (Sal) was infused intravenously for 74 h. Two hours after the beginning of the infusion, umbilical cord occlusion (UCO) was performed to produce fetal asphyxia (Sal+UCO: n = 9, Dob+UCO: n = 7), or sham occlusion (Sal+sham: n = 7, Dob+sham: n = 6) was performed. Brains were collected 72 h later for neuropathology. RESULTS Dobutamine did not induce cerebral changes in the sham UCO group. UCO increased apoptosis and microglia density in white matter, hippocampus, and caudate nucleus, and astrocyte density in the caudate nucleus. Dobutamine commenced before UCO reduced microglia infiltration in the white matter, and microglial and astrocyte density in the caudate. CONCLUSION In preterm hypoxia-induced brain injury, dobutamine decreases neuroinflammation in the white matter and caudate, and reduces astrogliosis in the caudate. Early administration of dobutamine in preterm infants for cardiovascular stabilization appears safe and may be neuroprotective against unforeseeable cerebral hypoxic injury.
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Interpretation of Cerebral Oxygenation Changes in the Preterm Infant. CHILDREN-BASEL 2018; 5:children5070094. [PMID: 29987227 PMCID: PMC6069134 DOI: 10.3390/children5070094] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/15/2018] [Revised: 06/28/2018] [Accepted: 07/06/2018] [Indexed: 12/30/2022]
Abstract
Near-infrared spectroscopy (NIRS) allows for continuous, non-invasive monitoring of end-organ tissue oxygenation. The use of NIRS, cerebral NIRS (cNIRS) in particular, in neonatal care has increased significantly over the last few years. This dynamic monitoring technique provides real-time information on the cerebral and haemodynamic status of the neonate and has the potential to serve as an important adjunct to patient care with some centres routinely utilising cNIRS to aid decision-making at the bedside. cNIRS values may be influenced by many variables, including cardiac, respiratory and metabolic parameters, and therefore it is essential to understand the pathophysiology behind alterations in cNIRS values. Correct interpretation is required to direct appropriate patient-specific interventions. This article aims to assist clinicians in deciphering cNIRS values by providing an overview of potential causes of fluctuations in cNIRS values, illustrated by common clinical scenarios, with particular emphasis on the preterm infant.
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Oulego Erroz I, Alonso Quintela P, Jiménez Gonzalez A, Terroba Seara S, Rodríguez Blanco S, Rosón Varas M, Castañón López L. [Impact of screening and treatment of low systemic blood flow in the prevention of severe intraventricular haemorrhage and/or death in pre-term infants]. An Pediatr (Barc) 2018; 89:369-377. [PMID: 29622414 DOI: 10.1016/j.anpedi.2018.02.010] [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: 10/16/2017] [Revised: 02/08/2018] [Accepted: 02/14/2018] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE To assess the effect of a protocolised intervention for low systemic blood flow (SBF) in the occurrence of severe intraventricular haemorrhage (IVH) or death in pre-term infants. METHODS A study with a quasi-experimental design with retrospective controls was conducted on pre-term infants of less than 30weeks of gestational age, born between January 2016 and July 2017, who were consecutively included in the intervention period. The control cohort included pre-term infants (born between January 2013 and December 2015) matched by gestational age, birth weight, and gender (two controls for each case). The cases of low SBF diagnosed according to functional echocardiography during the study period received dobutamine (5-10μg/kg/min) for 48hours. RESULTS The study included 29 cases (intervention period) and 54 controls (pre-intervention period). Ten out of 29 (34.5%) infants received dobutamine for low SBF during the intervention period, with 3/29 (10.3%) cases of severe IVH and/or death compared to 17/54 (31.5%) in the control cohort (p=.032). There was an independent association between the intervention and a decreased occurrence of severe IVH/death after adjusting for confounding factors both in the logistic regression model [OR 0.11 (95%CI: 0.01-0.65), p=.015], as well as in the sensitivity analysis using inverse probability of treatment weighting [OR 0.23 (95%CI: 0.09-0.56); p=.001]. CONCLUSIONS In this study with retrospective controls, a protocolised screening, and treatment for low SBF was associated with a decreased occurrence of severe IVH or death in preterm infants. Large, adequately powered trials, are needed in order to determine whether postnatal interventions directed at low SBF can improve neurological outcomes.
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Affiliation(s)
- Ignacio Oulego Erroz
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España.
| | - Paula Alonso Quintela
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España
| | - Aquilina Jiménez Gonzalez
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España
| | - Sandra Terroba Seara
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España
| | - Silvia Rodríguez Blanco
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España
| | - María Rosón Varas
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España
| | - Leticia Castañón López
- Unidad de Neonatología, Servicio de Pediatría, Complejo Asistencial Universitario de León, León, España
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Joynt C, Cheung PY. Treating Hypotension in Preterm Neonates With Vasoactive Medications. Front Pediatr 2018; 6:86. [PMID: 29707527 PMCID: PMC5908904 DOI: 10.3389/fped.2018.00086] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Accepted: 03/19/2018] [Indexed: 12/23/2022] Open
Abstract
Preterm neonates often have hypotension which may be due to various etiologies. While it is controversial to define hypotension in preterm neonates, various vasoactive medications are commonly used to provide the cardiovascular support to improve the blood pressure, cardiac output, or to treat shock. However, the literature on the systemic and regional hemodynamic effects of these antihypotensive medications in neonates is deficient and incomplete, and cautious translation of findings from other clinical populations and animal studies is required. Based on a literature search on published reports, meta-analytic reviews, and selected abstracts, this review discusses the current available information on pharmacologic actions, clinical effects, and side effects of commonly used antihypotensive medications including dopamine, dobutamine, epinephrine, norepinephrine, vasopressin, and milrinone in preterm neonates.
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Affiliation(s)
- Chloe Joynt
- Department of Pediatrics, University of Alberta, Edmonton, AB, Canada
| | - Po-Yin Cheung
- Department of Pediatrics, University of Alberta, Edmonton, AB, Canada.,Department of Pharmacology and Surgery, University of Alberta, Edmonton, AB, Canada.,Centre for the Studies of Asphyxia and Resuscitation, Edmonton, AB, Canada
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Garvey AA, Kooi EMW, Dempsey EM. Inotropes for Preterm Infants: 50 Years on Are We Any Wiser? Front Pediatr 2018; 6:88. [PMID: 29682496 PMCID: PMC5898425 DOI: 10.3389/fped.2018.00088] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2018] [Accepted: 03/20/2018] [Indexed: 12/20/2022] Open
Abstract
For almost half a century, inotropes have been administered to preterm infants with the ultimate goal of increasing their blood pressure. A number of trials, the majority of which focused on dopamine administration, have demonstrated increased blood pressure following inotrope administration in preterm infants and have led to continued use of inotropes in our neonatal units. We have also seen an increase in the number of potential agents available to the clinician. However, we now know that hypotension is a much broader concept than blood pressure alone, and our aim should instead be focused on improving end organ perfusion, specifically cerebral perfusion. Only a limited number of studies have incorporated the organ-relevant hemodynamic changes and long-term outcomes when assessing inotropic effects in neonates, the majority of which are observational studies or have a small sample size. In addition, important considerations, including the developing/maturing adrenergic receptors, polymorphisms of these receptors, and other differences in the pharmacokinetics and pharmacodynamics of preterm infants, are only recently being recognized. Certainly, there remains huge variation in practice. The lack of well-conducted randomized controlled trials addressing these relevant outcomes, along with the difficulty executing such RCTs, leaves us with more questions than answers. This review provides an overview of the various inotropic agents currently being used in the care of preterm infants, with a particular focus on their organ/cerebral hemodynamic effects both during and after transition.
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Affiliation(s)
- Aisling A Garvey
- Department of Paediatrics and Child Health, Neonatal Intensive Care Unit, University College Cork, Cork, Ireland.,INFANT, Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland
| | - Elisabeth M W Kooi
- Department of Paediatrics and Child Health, Neonatal Intensive Care Unit, University College Cork, Cork, Ireland.,Division of Neonatology, Beatrix Children's Hospital, University Medical Center Groningen, University of Groningen, Groningen, Netherlands
| | - Eugene M Dempsey
- Department of Paediatrics and Child Health, Neonatal Intensive Care Unit, University College Cork, Cork, Ireland.,INFANT, Irish Centre for Fetal and Neonatal Translational Research, University College Cork, Cork, Ireland
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Rabe H, Rojas-Anaya H. Inotropes for preterm babies during the transition period after birth: friend or foe? Arch Dis Child Fetal Neonatal Ed 2017; 102:F547-F550. [PMID: 28818851 DOI: 10.1136/archdischild-2016-311709] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Revised: 06/28/2017] [Accepted: 07/06/2017] [Indexed: 11/04/2022]
Abstract
During the transition to extrauterine life, preterm infants are at high risk of developing circulatory failure. Currently, hypotension is used as major diagnostic criteria for starting treatments such as fluid boluses, inotropes or steroids. Most of these treatment options have not been studied in large randomised controlled trials for efficacy and safety and are under discussions. A wide variety in their use is reported in the literature and clear evidence about which inotrope or other treatment should be preferred is lacking. In addition, there is ongoing debate about the appropriate threshold values for blood pressure. Other diagnostic measures for poor circulation are functional echocardiography, near-infrared spectroscopy, capillary refill time, base excess and serum lactate. Large randomised controlled trials for the use of dopamine and dobutamine in preterm infants <32 weeks gestation are under way to fill the knowledge gaps on the assessment of circulatory compromise and on efficacy and safety of the studied age-appropriate drug formulations.
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Affiliation(s)
- Heike Rabe
- Department of Paediatrics, Brighton and Sussex Medical School, Brighton, UK.,Department of Neonatology, Brighton Sussex University Hospitals NHS Trust, Brighton, UK
| | - Hector Rojas-Anaya
- Department of Neonatology, Brighton Sussex University Hospitals NHS Trust, Brighton, UK
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Inotropes do not increase cardiac output or cerebral blood flow in preterm piglets. Pediatr Res 2016; 80:870-879. [PMID: 27490740 DOI: 10.1038/pr.2016.156] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2016] [Accepted: 06/10/2016] [Indexed: 01/26/2023]
Abstract
BACKGROUND The preterm newborn is at high risk of developing cardiovascular compromise during the first day of life and this is associated with increased risk of brain injury. Standard treatments are volume expansion and administration of inotropes, typically dopamine and/or dobutamine, but there is limited evidence that inotropes improve clinical outcomes. This study investigated the efficacy of dopamine and dobutamine for the treatment of cardiovascular compromise in the preterm newborn using a piglet model. METHODS Preterm and term piglets were assigned to either dopamine, dobutamine or control infusions. Heart rate, left ventricular contractility, cardiac output, blood pressure, and cerebral and regional blood flows were measured during baseline, low (10 µg/kg/h), and high (20 µg/kg/h) dose infusions. RESULTS At baseline, preterm piglets had lower cardiac contractility, cardiac output, blood pressure, and cerebral blood flow compared to term piglets. The response of preterm piglets to either dopamine or dobutamine administration was less than in term piglets. In both preterm and term piglets, cardiac output and cerebral blood flow were unaltered by either inotrope. CONCLUSION In order to provide better cardiovascular support, it may be necessary to develop treatments that target receptors with a more mature profile than adrenoceptors in the preterm newborn.
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New developments in cerebral blood flow autoregulation analysis in preterm infants: a mechanistic approach. Pediatr Res 2016; 79:460-5. [PMID: 26539666 DOI: 10.1038/pr.2015.231] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 08/12/2015] [Indexed: 11/08/2022]
Abstract
BACKGROUND Impaired autoregulation capacity implies that changes in cerebral perfusion follow changes in blood pressure; however, no analytical method has explored such a signal causality relationship in infants. We sought to develop a method to assess cerebral autoregulation from a mechanistic point of view and explored the predictive capacity of the method to classify infants at risk for adverse outcomes. METHODS The partial directed coherence (PDC) method, which considers synchronicity and directionality of signal dependence across frequencies, was used to analyze the relationship between spontaneous changes in mean arterial pressure (MAP) and the cerebral tissue oxygenation index (TOI). PDCMAP>>TOI indicated that changes in TOI were induced by MAP changes, and PDCTOI>>MAP indicated the opposite. RESULTS The PDCMAP>>TOI and PDCTOI>>MAP values differed. PDCMAP>>TOI adjusted by gestational age predicted low superior vena cava flow (≤41 ml/kg per min), with an area under the receiver operating characteristic curve of 0.72 (95% CI: 0.63-0.81; P < 0.001), whereas PDCTOI>>MAP did not. The adjusted pPDCMAP>>TOI (the average value per patient) predicted severe intracranial hemorrhage and mortality. CONCLUSION PDCMAP>>TOI allows for a noninvasive physiological interpretation of the pressure autoregulation process in neonates. PDCMAP>>TOI is a good classifier for infants at risk of brain hypoperfusion and adverse outcomes.
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