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Smeekens SP, Leferink M, Yntema HG, Kamsteeg EJ. Maternal cell contamination in postnatal umbilical cord blood samples implies a low risk for genetic misdiagnoses. Prenat Diagn 2024. [PMID: 38782597 DOI: 10.1002/pd.6595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 01/17/2024] [Accepted: 02/13/2024] [Indexed: 05/25/2024]
Abstract
OBJECTIVE Maternal cell contamination (MCC) poses a risk for misdiagnosis in prenatal genetic testing, and is examined in accredited diagnostic laboratories However, the awareness of possible MCC in perinatal/postnatal genetic testing, mainly of umbilical cord blood (CB), is lower. METHOD We investigated the rate of MCC in DNA from both umbilical CB samples and umbilical cord samples that were sent to our diagnostic laboratory for diagnostic testing between 1995 and 2021 (n = 236). RESULTS MCC was detected in 4% of umbilical CB samples, and in one umbilical cord sample. Particularly tests enriching for a specific variant are very sensitive for low amounts of MCC, as we emphasize here with a false positive diagnosis of myotonic dystrophy type 1 in a newborn. CONCLUSIONS Overall, with appropriate collection and use, umbilical CB and umbilical cord samples are suitable for genetic testing based on the low rates of MCC and misdiagnosis. These findings do however underline the importance of routine MCC testing in umbilical CB samples and umbilical cord samples for both requesting clinicians and diagnostic genetic laboratories.
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Affiliation(s)
- Sanne P Smeekens
- Department of Human Genetics, Radboudumc, Nijmegen, The Netherlands
| | - Maike Leferink
- Department of Human Genetics, Radboudumc, Nijmegen, The Netherlands
| | - Helger G Yntema
- Department of Human Genetics, Radboudumc, Nijmegen, The Netherlands
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Heeger LE, Koster MIJ, Caram-Deelder C, Bekker V, van der Bom JG, Lopriore E. Umbilical Cord Blood as an Alternative to Neonatal Blood for Complete Blood Count: A Comparison Study. J Pediatr 2024; 271:114059. [PMID: 38636783 DOI: 10.1016/j.jpeds.2024.114059] [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: 02/07/2024] [Revised: 04/08/2024] [Accepted: 04/14/2024] [Indexed: 04/20/2024]
Abstract
OBJECTIVE To assess concordance between umbilical cord blood (UCB) and neonatal blood (NB) laboratory test results at birth. STUDY DESIGN This retrospective study considered very preterm neonates (<32 weeks' gestational age) admitted to a tertiary neonatal intensive care unit from 2012 to 2023. Inclusion criteria required neonates with a complete blood count measured in both UCB and NB drawn within 2 hours after birth. Median hemoglobin (Hb) and hematocrit (Hct) concentrations were compared between UCB (venous samples) and NB (venous, arterial, or capillary samples). RESULTS A total of 432 neonates with paired UCB and NB values were included in the study. Hb concentration in UCB was 14.7 g/dL (IQR 13.5-16.1 g/dL) compared with 14.8 g/dL (IQR 12.6-19.3 g/dL) in venous NB samples, 13.9 g/dL (IQR 12.9-15.3 g/dL) in arterial NB and 18.7 g/dL (IQR 16.6-20.8 g/dL) in capillary NB. The regression equation showed a correction factor of 1.08 for converting Hb values from UCB to venous NB. Median Hct concentration in UCB was 0.45 L/L (IQR: 0.41-0.49 L/L) compared with 0.48 L/L (IQR 0.43-0.54 L/L) in venous NB, 0.42 L/L (IQR 0.38-0.45 L/L) in arterial NB and 0.57 L/L, (IQR 0.51-0.63 L/L) in capillary NB. CONCLUSIONS Hb and Hct concentrations measured in UCB are similar to those measured in venous blood in very preterm infants and are valid alternatives for NB tests at birth. Hb and Hct concentrations in arterial and capillary NB are respectively lower and higher compared with UCB measurements.
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Affiliation(s)
- Lisanne E Heeger
- Division of Neonatology, Department of Pediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands; Sanquin Blood Supply Foundation, Clinical Center for Transfusion Research, Amsterdam, The Netherlands
| | - Myrthe I J Koster
- Division of Neonatology, Department of Pediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Camila Caram-Deelder
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Vincent Bekker
- Division of Neonatology, Department of Pediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands
| | - Johanna G van der Bom
- Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
| | - Enrico Lopriore
- Division of Neonatology, Department of Pediatrics, Willem-Alexander Children's Hospital, Leiden University Medical Center, Leiden, The Netherlands.
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Bensouda B, Mandel R, Altit G, Ali N. Umbilical cord blood culture for early onset sepsis in preterm infants. Pediatr Res 2024:10.1038/s41390-024-03183-7. [PMID: 38622259 DOI: 10.1038/s41390-024-03183-7] [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: 12/20/2023] [Revised: 03/17/2024] [Accepted: 03/24/2024] [Indexed: 04/17/2024]
Abstract
BACKGROUND Umbilical cord blood culture (UCBC) may have a diagnostic utility for early onset sepsis (EOS) detection in preterm infants. It may prevent sampling the newborn and collect a higher volume of blood for pathogenic identification. METHODS Retrospective analysis at a tertiary care center in Canada of preterm infants ≤ 34 0/7 weeks' gestation with UCBC taken at birth. RESULTS Of 505 admitted infants, 195 had UCBC. 170 UCBCs were negative; 44 of these had also negative neonatal blood culture (NBC). No infants with negative UCBC showed EOS symptoms in the first week of life. 25 UCBCs were positive: 18 were contaminants (all with negative NBC) and 7 were confirmed as EOS. 18 infants with UCBC contaminants remained asymptomatic. 7 EOS cases were identified, with varying bacteriological profiles; 5 displayed sepsis symptoms while 2 were asymptomatic. Risk of EOS increased with prolonged rupture of membranes. CONCLUSIONS UCBC effectively detected EOS establishing it as a method with possibly better diagnostic performance than NBC in high-risk neonates. Further studies are needed to improve UCBC technique and lower contamination rates. IMPACT Umbilical cord blood culture has a higher bacterial identification rate than peripheral venous blood culture for the early identification of early-onset sepsis in preterm infants. Umbilical cord blood cultures that showed no growth were reliable predictors of not developing early onset sepsis. Umbilical cord blood culture should be considered as part of the evaluation for early onset sepsis in the preterm infants.
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Affiliation(s)
- Brahim Bensouda
- Maisonneuve-Rosemont Hospital and University of Montreal, Department of Pediatrics, Montréal, QC, Canada.
| | - Romain Mandel
- Maisonneuve-Rosemont Hospital and University of Montreal, Department of Pediatrics, Montréal, QC, Canada
| | - Gabriel Altit
- Montreal Children's Hospital and McGill University Health Center, Department of Pediatrics, Montréal, QC, Canada
| | - Nabeel Ali
- Maisonneuve-Rosemont Hospital and University of Montreal, Department of Pediatrics, Montréal, QC, Canada
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Adams S, Llorin H, Dobson LJ, Studwell C, Wilkins-Haug L, Guseh S, Gray KJ. Postnatal genetic testing on cord blood for prenatally identified high-probability cases. Prenat Diagn 2023; 43:1120-1131. [PMID: 37036331 DOI: 10.1002/pd.6352] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 03/20/2023] [Accepted: 03/27/2023] [Indexed: 04/11/2023]
Abstract
OBJECTIVE To evaluate the utility of postnatal genetic testing on umbilical cord blood (CB) for prenatally identified high-probability fetuses. METHOD CB for genetic testing was offered to individuals who met one of the following criteria: (i) fetal anomaly, (ii) positive non-invasive prenatal screening by cfDNA or biochemical analysis, or (iii) family history. Individuals with diagnostic testing, but not microarray, were also included when recommended by society guidelines. CB was collected at Brigham and Women's and Emerson Hospitals between 2016 and 2021. RESULTS 448 individuals consented for cord blood testing (370 (82.6%) for fetal anomalies, 51 (11.4%) for high-probability cfDNA, and 27 (6.0%) for family history) and a total of 393 (87.7%) samples were analyzed. Genetic testing yielded a diagnosis in 92 (23.4%) neonates by karyotype (n = 37), chromosomal microarray (CMA) (n = 32), and other molecular analysis (n = 23). Testing averaged 10.3 days (range 1-118 days). 68 (73.9%) diagnoses potentially impacted neonatal management. MCC could not be definitively excluded in only 1.4% (6/418) of samples. CONCLUSION Prenatal identification of high-probability fetuses and genetic testing on CB facilitates timely genetic diagnoses and neonatal management. Testing provides reassurance and reduces a postnatal diagnostic odyssey for high-probability neonates.
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Affiliation(s)
- Sophie Adams
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Hannah Llorin
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Lori J Dobson
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Courtney Studwell
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Department of Pathology, Brigham and Women's Hospital, Boston, Massachusetts, USA
| | - Louise Wilkins-Haug
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Division of Maternal-Fetal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Stephanie Guseh
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Division of Maternal-Fetal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Kathryn J Gray
- Center for Fetal Medicine and Reproductive Genetics, Department of Obstetrics and Gynecology, Brigham and Women's Hospital, Boston, Massachusetts, USA
- Division of Maternal-Fetal Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Bahr TM, Carroll PD. Cord blood sampling for neonatal admission laboratory testing-An evidence-based blood conservation strategy. Semin Perinatol 2023:151786. [PMID: 37365044 DOI: 10.1016/j.semperi.2023.151786] [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] [Indexed: 06/28/2023]
Abstract
Historically, blood for admission laboratory studies in neonates was obtained through direct neonatal phlebotomy. Over the past decade there has been an increase in studies evaluating the validity and clinical impact of using a cord blood sample for many admission laboratory studies. This article reviews various studies that together have shown that using cord blood samples for admission testing in neonates is both acceptable and beneficial.
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Affiliation(s)
- Timothy M Bahr
- Intermountain Health-Utah Valley Hospital, Provo, UT, USA; Division of Neonatology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
| | - Patrick D Carroll
- Intermountain Health - St. George Regional Hospital, St. George, UT, USA.
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Romańska J, Wawrzoniak T, Hołowaty D, Mazanowska N, Krajewski P. Point-of-Care Verification of Blood Culture Volume in Neonates: A Feasibility Trial. JOURNAL OF MOTHER AND CHILD 2023; 27:83-92. [PMID: 37561917 PMCID: PMC10414768 DOI: 10.34763/jmotherandchild.20232701.d-22-00063] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 10/24/2022] [Accepted: 02/01/2023] [Indexed: 08/12/2023]
Abstract
BACKGROUND Blood cultures remain the gold standard for the diagnosis of sepsis. However, volumes of blood submitted for cultures often do not match the recommended values. We propose a simple intervention aimed to verify the volume of blood sampled using a scale. This study was undertaken in preparation for a future, multicenter, pre- and post-intervention trial. Our primary objective was to test the feasibility (uptake and retention) of this future intervention. MATERIALS AND METHODS This study was conducted at a neonatal department in Warsaw, Poland, over a period of eight months (May to December 2020). Before starting the study, we undertook an educational intervention focused on obtaining adequate blood volumes for culture. The culture bottles that were weighed in advance were distributed in all blood collection areas. Blood volume was verified by weighing the bottle immediately after blood inoculation. The calculated value was communicated to the collecting clinician and recorded. The primary outcome measure was the percentage of blood culture submissions for which the blood volume inoculated into the bottles was determined by weighing. RESULTS During the study period, 244 blood samples were collected for culture, out of which 205 samples were weighed (84.0%, CI95 [78.8% to 88.4%]). This high proportion remained stable throughout the study period. We have not observed any adverse events related to the study. CONCLUSIONS The point-of-care verification of blood culture volume using a scale was feasible to implement. Since we have met our pre-established criterion for success, a future, definitive trial is likely to proceed.
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Affiliation(s)
- Justyna Romańska
- Department of Obstetrics and Gynaecology, Division of Neonatology and Neonatal Intensive Care, Medical University of Warsaw, Warsaw, Poland
| | - Tomasz Wawrzoniak
- Department of Obstetrics and Gynaecology, Division of Neonatology and Neonatal Intensive Care, Medical University of Warsaw, Warsaw, Poland
| | - Dominika Hołowaty
- Department of Obstetrics and Gynaecology, Division of Neonatology and Neonatal Intensive Care, Medical University of Warsaw, Warsaw, Poland
| | - Natalia Mazanowska
- Department of Obstetrics and Gynaecology, Division of Neonatology and Neonatal Intensive Care, Medical University of Warsaw, Warsaw, Poland
| | - Paweł Krajewski
- Department of Obstetrics and Gynaecology, Division of Neonatology and Neonatal Intensive Care, Medical University of Warsaw, Warsaw, Poland
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Narvey M, Khashu M. It is high time we reduce "routine" blood work in neonatal units. Front Pediatr 2023; 11:1147512. [PMID: 36969292 PMCID: PMC10033559 DOI: 10.3389/fped.2023.1147512] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 02/22/2023] [Indexed: 03/29/2023] Open
Affiliation(s)
- Michael Narvey
- Department of Neonatology, Women's Hospital Winnipeg, University of Manitoba, Winnipeg, MB, Canada
| | - Minesh Khashu
- Neonatal Unit, University Hospitals Dorset, Poole, United Kingdom
- Correspondence: Minesh Khashu
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Hansen AP, Haischer-Rollo GD, Shapiro JB, Aden JK, Abadie JM, Mu TS. The Novel Use of Umbilical Cord Blood to Obtain Complete Blood Counts for Critical Neonatal Assessment. Cureus 2022; 14:e28009. [PMID: 36134078 PMCID: PMC9470209 DOI: 10.7759/cureus.28009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/24/2022] [Indexed: 11/23/2022] Open
Abstract
Background: Neonates undergoing clinical evaluations are often subjected to potentially painful phlebotomy for laboratory tests. The use of cord blood laboratory values for admission has been suggested as a means to decrease the risk of painful venipuncture and anemia. Methods: Peripheral and umbilical cord blood complete blood count (CBC) results were obtained from infants who required a CBC. Results were compared using the Sysmex XN heme analyzer (Sysmex, Kobe, Japan). Results: White blood cell (WBC) and hemoglobin (HgB) values were significantly higher in peripheral samples than in cord samples. The mean cord WBC count was 14.1 × 103/mm3 versus 15.6 × 103/mm3 peripherally (p < 0.001). The mean cord HgB was 15.8 g/dL versus 16.8 g/dL peripherally (p < 0.001). Cord platelet (Plt) counts were, conversely, lower in peripheral samples than in cord samples (264.8 × 103/mm3 versus 242.3 × 103/mm3, respectively; p < 0.001). Although statistically different, the mean CBC values from both samples were within the reference ranges. Delayed cord clamping (DCC) increased peripheral versus cord HgB difference nearly threefold (0.6-1.7 g/dL; p = 0.01). Conclusions: Cord blood is an acceptable source for CBC blood sampling in newborn infants and can be used for clinical decisions. CBC laboratory values for cord blood remained within the peripheral blood reference range, with slight variability between the two samples.
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Zaitoon H, Riskin A, Hemo M, Toropine A, Gover A. Utilizing umbilical cord blood - Minimizing blood sampling and pain in healthy infants at risk for polycythemia. Early Hum Dev 2022; 168:105573. [PMID: 35468574 DOI: 10.1016/j.earlhumdev.2022.105573] [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: 12/09/2021] [Revised: 03/20/2022] [Accepted: 04/12/2022] [Indexed: 11/29/2022]
Abstract
BACKGROUND Exposure to pain in early life was associated with long term consequences, therefore strategies for minimizing painful procedures in newborns should be employed. The utility and reliability of cord blood CBC was demonstrated before, however data regarding use of cord blood in healthy infants at risk for polycythemia are lacking. METHODS A single-center, paired-sampling prospective laboratory study including all healthy asymptomatic infants born after 36 weeks gestation who were SGA (<2500 g), LGA (>4000 g), or born to mothers with diabetes in pregnancy. Blood count indices were compared between umbilical and neonatal capillary or venous blood samples. In order to predict cut-off values for neonatal polycythemia using umbilical hematocrit, receiver operator curves (ROC) were plotted. RESULTS Paired samples were collected from 433 infants. Mean gestational age and birth-weight were 39.0 ± 1.3 weeks and 3489 ± 682 g. Hemoglobin, hematocrit and WBC values were lower in cord blood compared to neonatal, but PLT count was higher. Pearson r showed only modest correlation between peripheral capillary and umbilical or venous Hct - 0.35 (p < 0.001), and 0.44 (p < 0.001), respectively. In order to try and capture clinically significant polycythemia ROC was plotted for hematocrit >70% and <40%. In our cohort, using the calculated cutoff values (>51% and <35%) could have resulted in a decrease of 72% of neonatal blood draws. CONCLUSION This analysis should be interpreted with caution, as currently it cannot support the routine use of umbilical samples' hematocrits for making treatment decision in newborns at risk for polycythemia. Further larger studies are needed.
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Affiliation(s)
- Hussein Zaitoon
- Department of Pediatrics, Bnai Zion Medical Center, Ruth & Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel.
| | - Arieh Riskin
- Department of Neonatology, Bnai Zion Medical Center, Ruth & Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Miri Hemo
- Department of Neonatology, Bnai Zion Medical Center, Ruth & Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Arina Toropine
- Department of Neonatology, Bnai Zion Medical Center, Ruth & Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
| | - Ayala Gover
- Department of Neonatology, Bnai Zion Medical Center, Ruth & Bruce Rappaport Faculty of Medicine, Technion, Israel Institute of Technology, Haifa, Israel
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Ikuta T, Iwatani S, Okutani T, Yoshimoto S. Gestational Age-Dependent Reference Ranges for Albumin Levels in Cord Serum. Neonatology 2022; 119:327-333. [PMID: 35294949 DOI: 10.1159/000522502] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 02/08/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND To diagnose hypoalbuminemia in newborns, it is essential to establish a definition applicable to those with a different gestational age (GA) and clinical conditions. A positive correlation between serum albumin levels and GA has been reported, but the study was limited to small numbers of newborns. We therefore investigated the GA-dependent reference ranges for serum albumin levels using cord venous blood (UC-Alb levels) from a large number of newborns delivered at a tertiary perinatal center. METHODS Albumin levels were assessed in 2,917 newborns at 22-41 weeks of GA after exclusion of those with congenital disorders. Linear regression analysis was used to correlate GA and UC-Alb levels. After calculation of the percentile values of UC-Alb levels for each week of GA, the distributions were approximated by the least-squares method. To validate the determined linear approximation of the 5%ile value, the UC-Alb levels in newborns with hydrops fetalis and gastroschisis were used. RESULTS A significant positive correlation between GA and UC-Alb levels was found (rs = 0.701, p < 0.001, respectively). The distribution of the 5%ile of UC-Alb levels (Y) by GA (X) was approximated as a straight line (Y = 0.062 × X + 0.326, R2 = 0.951). Among the 59 and 18 newborns with hydrops fetalis and gastroschisis, 51 (86.4%) and 15 (83.3%), respectively, were below the line. CONCLUSIONS We established GA-dependent reference ranges for serum albumin levels, which may be useful to accurately diagnose hypoalbuminemia in newborns.
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Affiliation(s)
- Toshihiko Ikuta
- Department of Neonatology, Hyogo Prefectural Kobe Children's Hospital Perinatal Center, Kobe, Japan
| | - Sota Iwatani
- Department of Neonatology, Hyogo Prefectural Kobe Children's Hospital Perinatal Center, Kobe, Japan
| | - Takahiro Okutani
- Department of Pediatrics, Saiseikai Hyogo-ken Hospital, Kobe, Japan
| | - Seiji Yoshimoto
- Department of Neonatology, Hyogo Prefectural Kobe Children's Hospital Perinatal Center, Kobe, Japan
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Katz BZ, Benisty D, Kay S, Herzlich J, Raskind C, Marom R. Comprehensive Morphological Assessment of Cord Blood: Normal Values and the Prevalence of Morphologically Aberrant Leukocytes. Acta Haematol 2021; 145:184-192. [PMID: 34727546 DOI: 10.1159/000520638] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 11/01/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Cord blood (CB) is becoming a valuable source for stem cells utilized in a variety of cell therapy applications, as well as for newborn diagnostics. Some parameters of the CB cellular components can be provided by automated analyzers, while others, such as immature or aberrant cells, require blood film morphological assessment. The objectives of the study were to establish normal CB morphology and to determine the prevalence of morphologically aberrant leukocytes in CB. METHODS We performed a comprehensive morphological analysis of 100 CB samples taken from healthy term and appropriate-for-gestational-age neonates born to healthy mothers, preterm neonates, neonates of diabetic mothers, and small-for-gestational-age neonates. Blood counts were assessed, and manual morphological analyses were performed by laboratory specialists. RESULTS The manual differential count of normal CB samples established the following values: 47.8 ± 10.7% neutrophils, 31.2 ± 9.8% lymphocytes, 10.0 ± 4.0% monocytes, and 3.0 ± 2.5% eosinophils, with no significant sex-related differences. Blasts were observed in 44/100 samples with an average of 0.5 ± 0.7% per sample, and only a minor left shift was observed. There were significant populations of large granular lymphocytes (19.1 ± 10.6% of the total lymphocytes) and morphologically aberrant lymphocytes (12.4 ± 5.4% of the total lymphocytes) in the samples, irrespective of neonatal status. The differentials of preterm CB samples differ significantly from normal term CB samples, including the reverse of neutrophils/lymphocytes ratio, and the lack of basophils. CONCLUSIONS Normal values and unique morphological features in the CB of neonates are described. The abundant morphologically aberrant lymphocytes in CB may represent an immature state of the immune system at birth.
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Affiliation(s)
- Ben-Zion Katz
- Division of Hematology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Dan Benisty
- Division of Hematology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Sigi Kay
- Division of Hematology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Jacky Herzlich
- Department of Neonatology, Dana Dwek Children Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Craig Raskind
- Department of Neonatology, Dana Dwek Children Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Ronella Marom
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
- Department of Neonatology, Dana Dwek Children Hospital, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
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Neonatal blood culture inoculant volume: feasibility and challenges. Pediatr Res 2021; 90:1086-1092. [PMID: 33824451 PMCID: PMC8492767 DOI: 10.1038/s41390-021-01484-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2020] [Revised: 03/04/2021] [Accepted: 03/04/2021] [Indexed: 01/30/2023]
Abstract
BACKGROUND Clinicians often express concerns about poor sensitivity of blood cultures in neonates resulting from inadequate inoculant volumes. Our objective was to determine the inoculant volume sent for neonatal sepsis evaluations and identify areas of improvement. METHODS Single-center prospective observational study of infants undergoing sepsis evaluation. Blood volume was determined by clinician documentation over 21 months, and additionally by weighing culture bottles during 12 months. Adequate volume was defined as ≥1 mL total inoculant per evaluation. For first-time evaluations, local guidelines recommend sending an aerobic-anaerobic pair with 1 mL inoculant in each. RESULTS There were 987 evaluations in 788 infants. Clinicians reported ≥1 mL total inoculant in 96.9% evaluations. Among 544 evaluations where bottles were weighed, 93.4% had ≥1 mL total inoculant. Very low birth weight infants undergoing evaluations >7 days after birth had the highest proportion of inadequate inoculants (14.4%). Only 3/544 evaluations and 26/1011 bottles had total inoculant <0.5 mL. Ninety evaluations had <1 mL in both aerobic and anaerobic bottles despite a total inoculant volume that allowed inoculation of ≥1 mL in one of the bottles. CONCLUSIONS Obtaining recommended inoculant volumes is feasible in majority of neonates. Measuring inoculant volumes can focus improvement efforts and improve test reliability. IMPACT Clinicians express concern about the unreliability of neonatal blood cultures because of inadequate inoculant volume. We investigated over 900 evaluations and found >90% of evaluations have ≥1 mL inoculant. Monitoring adequacy of blood culture technique can identify areas of improvement and may allay concerns about blood culture reliability. Current recommendations for adequate inoculant volume for blood cultures are met in a majority of neonates. Areas of improvement include preterm late-onset sepsis evaluations and distribution techniques during inoculation.
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Mu TS, Prescott AC, Haischer-Rollo GD, Aden JK, Shapiro JB. Umbilical Cord Blood Use for Admission Blood Tests of VLBW Preterm Neonates: A Randomized Control Trial. Am J Perinatol 2021. [PMID: 34407547 DOI: 10.1055/s-0041-1733781] [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] [Indexed: 10/20/2022]
Abstract
OBJECTIVE Umbilical cord blood (UCB) for admission laboratories is an approach to decrease anemia risk in very low birth weight (VLBW) neonates. We hypothesized that UCB use results in higher hemoglobin concentration [HgB] around 24 hours of life. STUDY DESIGN A randomized control trial among VLBW infants whose admission laboratories were drawn from UCB (n = 39) or the infant (n = 41) in three U.S. military NICUs (clinicaltrials.gov#NCT02103296). RESULTS No demographic differences were observed between groups. UCB infants had higher [HgB] at 12 to 24 hours of life (15.5 vs. 14.0 g/dL, p = 0.02). The median time to first transfusion was 17 days longer in the experimental group (p = 0.04), and at discharge, their number of donor exposures was lower (1.1 vs. 1.8, p = 0.04). CONCLUSION In the first 24 hours of life that is a period of higher risk for hemodynamic instability, UCB utilization for admission bloodwork in VLBW infants results in higher [HgB]. KEY POINTS · Umbilical cord blood laboratory work in preterm infants is feasible.. · Cord blood use for admission laboratories results in increased hemoglobin in the first 24 hours of life.. · Cord blood use for admission laboratories delays time to first transfusion in preterm infants..
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Affiliation(s)
- Thornton S Mu
- Department of Pediatrics, Brooke Army Medical Center, San Antonio, Texas
| | - Alicia C Prescott
- Department of Pediatrics, Tripler Army Medical Center, Honolulu, Hawaii
| | | | - James K Aden
- Department of Graduate Education, Brooke Army Medical Center, San Antonio, Texas
| | - Jonathan B Shapiro
- Department of Pediatrics, Brooke Army Medical Center, San Antonio, Texas
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14
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Medeiros PDB, Stark M, Long M, Allen E, Grace E, Andersen C. Feasibility and accuracy of cord blood sampling for admission laboratory investigations: A pilot trial. J Paediatr Child Health 2021; 57:611-617. [PMID: 33171536 DOI: 10.1111/jpc.15273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2020] [Revised: 09/16/2020] [Accepted: 10/27/2020] [Indexed: 11/29/2022]
Abstract
AIM Phlebotomy losses greatly contribute to anaemia following preterm birth. Therefore, the possibility of drawing initial tests from the placenta seems attractive. There is a lack of literature regarding the feasibility and accuracy of pathology tests taken from umbilical arterial and venous (UAB/UVB) compared to blood collected from the newborn. METHODS UAB and UVB complete blood pictures were compared with the initial neonatal blood test. The relationship between UAB, UVB and neonatal complete blood picture values was determined by Spearman's Rho correlation with absolute values compared by Kruskal-Wallis. P < 0.05 was considered significant. RESULTS Neonatal haemoglobin, white cell count, immature/total ratio and platelets were significantly correlated to the corresponding values in the UAB and UVB (all P < 0.001). While UAB and UVB haemoglobin and white cell count were similar, both were significantly lower than the neonatal values (P < 0.001 and P = 0.014, respectively). No difference was seen for immature/total ratio and platelet concentrations. UVB blood culture (BC) was feasible (90%), even with delayed cord clamping, and the UVB BC volume was significantly higher (P < 0.001), with a low rate of BC contamination (1.5%). CONCLUSIONS Our findings support the feasibility and accuracy of umbilical blood in place of blood collected from the newborn. This reduces the phlebotomy losses and allows higher blood volume collection which may increase the sensitivity of BC collection.
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Affiliation(s)
- Poliana De B Medeiros
- The Department of Neonatal Medicine, The Women's and Children's Hospital Adelaide, Adelaide, South Australia, Australia
| | - Michael Stark
- The Department of Neonatal Medicine, The Women's and Children's Hospital Adelaide, Adelaide, South Australia, Australia.,The Robinson Research Institute, The School of Medicine, The University of Adelaide, Adelaide, South Australia, Australia
| | - Miriam Long
- The Department of Neonatal Medicine, The Women's and Children's Hospital Adelaide, Adelaide, South Australia, Australia
| | - Elizabeth Allen
- The Department of Neonatal Medicine, The Women's and Children's Hospital Adelaide, Adelaide, South Australia, Australia
| | - Erin Grace
- The Department of Neonatal Medicine, The Women's and Children's Hospital Adelaide, Adelaide, South Australia, Australia
| | - Chad Andersen
- The Department of Neonatal Medicine, The Women's and Children's Hospital Adelaide, Adelaide, South Australia, Australia
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15
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Can cord blood sampling delay the first packed red blood cell transfusion? J Perinatol 2021; 41:644-647. [PMID: 33221814 DOI: 10.1038/s41372-020-00872-z] [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: 04/27/2020] [Revised: 09/27/2020] [Accepted: 11/04/2020] [Indexed: 11/09/2022]
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16
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Quinones Cardona V, Lowery V, Cooperberg D, Anday EK, Carey AJ. Eliminating Contamination in Umbilical Cord Blood Culture Sampling for Early-Onset Neonatal Sepsis. Front Pediatr 2021; 9:794710. [PMID: 34988042 PMCID: PMC8721114 DOI: 10.3389/fped.2021.794710] [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: 10/14/2021] [Accepted: 11/19/2021] [Indexed: 11/23/2022] Open
Abstract
Introduction: Despite the advantages of umbilical cord blood culture (UCBC) use for diagnosis of early onset sepsis (EOS), contamination rates have deterred neonatologists from its widespread use. We aimed to implement UCBC collection in a level III neonatal intensive care unit (NICU) and apply quality improvement (QI) methods to reduce contamination in the diagnosis of early onset sepsis. Methods: Single-center implementation study utilizing quality improvement methodology to achieve 0% contamination rate in UCBC samples using the Plan-Do-Study-Act (PDSA) model for improvement. UCBC was obtained in conjunction with peripheral blood cultures (PBC) in neonates admitted to the NICU due to maternal chorioamnionitis. Maternal and neonatal characteristics between clinical sepsis and asymptomatic groups were compared. Process, outcome, and balancing measures were monitored. Results: Eighty-two UCBC samples were collected in addition to peripheral blood culture from neonates admitted due to maternal chorioamnionitis. Ten (12%) neonates had a diagnosis of clinical sepsis. All PBCs were negative and 5 UCBCs were positive in the study period. After 2 PDSA cycles, there was special cause variation with improvement in the percent of contaminated samples from 7.3 to 0%. There was no change in antibiotic duration among asymptomatic neonates. Conclusions: Implementation of UCBC for the diagnosis of EOS in term infants is feasible and contamination can be minimized with the implementation of a core team of trained providers and a proper sterile technique without increasing antibiotic duration.
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Affiliation(s)
- Vilmaris Quinones Cardona
- Department of Pediatrics, St Christopher's Hospital for Children, Philadelphia, PA, United States.,Department of Pediatrics, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Vanessa Lowery
- Department of Pediatrics, St Christopher's Hospital for Children, Philadelphia, PA, United States
| | - David Cooperberg
- Department of Pediatrics, St Christopher's Hospital for Children, Philadelphia, PA, United States.,Department of Pediatrics, Drexel University College of Medicine, Philadelphia, PA, United States
| | - Endla K Anday
- Department of Pediatrics, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Pediatrics, Sidney Kimmel College of Medicine, Thomas Jefferson University, Philadelphia, PA, United States
| | - Alison J Carey
- Department of Pediatrics, St Christopher's Hospital for Children, Philadelphia, PA, United States.,Department of Pediatrics, Drexel University College of Medicine, Philadelphia, PA, United States.,Department of Microbiology and Immunology, Drexel University College of Medicine, Philadelphia, PA, United States
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17
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Iron Homeostasis Disruption and Oxidative Stress in Preterm Newborns. Nutrients 2020; 12:nu12061554. [PMID: 32471148 PMCID: PMC7352191 DOI: 10.3390/nu12061554] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/24/2020] [Accepted: 05/25/2020] [Indexed: 02/06/2023] Open
Abstract
Iron is an essential micronutrient for early development, being involved in several cellular processes and playing a significant role in neurodevelopment. Prematurity may impact on iron homeostasis in different ways. On the one hand, more than half of preterm infants develop iron deficiency (ID)/ID anemia (IDA), due to the shorter duration of pregnancy, early postnatal growth, insufficient erythropoiesis, and phlebotomy losses. On the other hand, the sickest patients are exposed to erythrocytes transfusions, increasing the risk of iron overload under conditions of impaired antioxidant capacity. Prevention of iron shortage through placental transfusion, blood-sparing practices for laboratory assessments, and iron supplementation is the first frontier in the management of anemia in preterm infants. The American Academy of Pediatrics recommends the administration of 2 mg/kg/day of oral elemental iron to human milk-fed preterm infants from one month of age to prevent ID. To date, there is no consensus on the type of iron preparations, dosages, or starting time of administration to meet optimal cost-efficacy and safety measures. We will identify the main determinants of iron homeostasis in premature infants, elaborate on iron-mediated redox unbalance, and highlight areas for further research to tailor the management of iron metabolism.
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Raffaeli G, Tripodi A, Manzoni F, Scalambrino E, Pesenti N, Amodeo I, Cavallaro G, Villamor E, Peyvandi F, Mosca F, Ghirardello S. Is placental blood a reliable source for the evaluation of neonatal hemostasis at birth? Transfusion 2020; 60:1069-1077. [PMID: 32315090 DOI: 10.1111/trf.15785] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2019] [Revised: 01/28/2020] [Accepted: 03/03/2020] [Indexed: 12/11/2022]
Abstract
BACKGROUND Phlebotomy is among the main determinants of anemia of prematurity. Blood sparing policies endorsed umbilical cord blood (here called placental) as an alternative source for laboratory testing. Little is known on the suitability of placental blood to evaluate neonatal hemostasis of newborn infants. We aimed to compare the hemostatic profile of paired placental and infant venous blood, by means of prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen, antithrombin, protein C, thromboelastography (TEG) and thrombin generation assay (TGA). STUDY DESIGN This was an observational single-center study. METHODS We collected at birth venous citrated blood from both placental and infant venous source and performed PT, APTT, fibrinogen, antithrombin, protein C, TEG (reaction time-R; kinetics-K alpha angle-α, maximum amplitude-MA and lysis at 30 minutes-LY30), and TGA (endogenous thrombin potential-ETP). RESULTS We enrolled 60 neonates with a median gestational age (range) of 37 weeks (28+1 -41) and birth-weight 2417 g (950-4170). Based on TEG and TGA, placental blood showed a procoagulant imbalance as indicated by lower median R (4.0 vs. 6.1 min; p < 0.001) and K (1.3 vs. 2.2 min; p < 0.001); higher α-angle (69.7 vs. 57.4°; p < 0.001) and ETP (1260 vs. 1078; p = 0.002) than those observed for infant venous blood. PT and APTT did not differ significantly between the two groups. CONCLUSIONS While placental and neonatal blood samples are equally suitable to measure the standard coagulation tests PT and APTT, placental blood leads to a procoagulant imbalance when testing is performed with TEG or TGA. These effects should be considered when interpreting results stemming from investigation of neonatal hemostasis.
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Affiliation(s)
- Genny Raffaeli
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy
| | - Armando Tripodi
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milan, Italy
| | - Francesca Manzoni
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy.,Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Erica Scalambrino
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milan, Italy
| | - Nicola Pesenti
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy.,Department of Statistics and Quantitative Methods, Division of Biostatistics, Epidemiology and Public Health, University of Milano-Bicocca, Milan, Italy
| | - Ilaria Amodeo
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy.,Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Giacomo Cavallaro
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy
| | - Eduardo Villamor
- Department of Pediatrics, Maastricht University Medical Center (MUMC+), School for Oncology and Developmental Biology (GROW), Maastricht, The Netherlands
| | - Flora Peyvandi
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Angelo Bianchi Bonomi Hemophilia and Thrombosis Center and Fondazione Luigi Villa, Milan, Italy.,Department of Pathophysiology and Transplantation, Università degli Studi di Milano, Milan, Italy
| | - Fabio Mosca
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy.,Department of Clinical Sciences and Community Health, Università degli Studi di Milano, Milan, Italy
| | - Stefano Ghirardello
- Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, NICU, Milan, Italy
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Effect of Umbilical Cord Blood Sampling versus Admission Blood Sampling on Requirement of Blood Transfusion in Extremely Preterm Infants: A Randomized Controlled Trial. J Pediatr 2019; 211:39-45.e2. [PMID: 31113718 DOI: 10.1016/j.jpeds.2019.04.033] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 04/12/2019] [Accepted: 04/16/2019] [Indexed: 12/18/2022]
Abstract
OBJECTIVE To evaluate the effect of blood sampling from the placental end of the umbilical cord compared with initial blood sampling from neonates, on the need for first packed red blood cell transfusion in extremely preterm infants. We hypothesized that cord blood sampling could delay the time to first blood transfusion. STUDY DESIGN In this single-center, assessor blind, randomized controlled trial, we included extremely low birth weight neonates <28 weeks of gestational age at birth. Five milliliter of blood for initial laboratory investigations was collected either from the placental end of the umbilical cord (study group) or from the neonate upon neonatal intensive care unit admission (control group). Both groups received similar anemia prevention strategies. The primary outcome was the time (in days) to the first packed red blood cell transfusion, and was compared using survival analysis. RESULTS Eighty neonates were enrolled. The time to first transfusion was significantly delayed in the cord sampling group (30 vs 14 days, hazard ratio: 0.44, [95% CI 0.27-0.72], P < .001). Fewer neonates in the cord sampling group were transfused in the first 28 days of life (30% vs 75%, P < .001). Overall transfusion requirements and other clinical outcomes were similar in the groups. CONCLUSIONS Initial blood sampling from placental end of umbilical cord, when combined with anemia prevention strategies, significantly prolonged the time to first transfusion and reduced the need for early transfusions among extremely premature neonates. TRIAL REGISTRATION Ctri.nic.in/ (CTRI/2017/04/008320).
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20
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Rolim ACB, Lambert MA, Borges JPG, Abbas SA, Bordin JO, Langhi Junior DM, Chiba AK, Santos AMND. BLOOD CELLS PROFILE IN UMBILICAL CORD OF LATE PRETERM AND TERM NEWBORNS. ACTA ACUST UNITED AC 2019; 37:264-274. [PMID: 31621769 PMCID: PMC6868547 DOI: 10.1590/1984-0462/;2019;37;3;00008] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2017] [Accepted: 03/25/2018] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To describe the hematological profile in cord blood of late preterm and term newborns and compare blood indices according to sex, weight for gestational age and type of delivery. METHODS Cross-sectional study with late preterm and term newborns in a second-level maternity. Multiple gestation, chorioamnionitis, maternal or fetal hemorrhage, suspected congenital infection, 5-minute Apgar <6, congenital malformations, and Rh hemolytic disease were excluded. Percentiles 3, 5,10, 25, 50, 75, 90, 95 and 97 of blood indices were calculated for both groups. RESULTS 2,662 newborns were included in the sample, 51.1% males, 7.3% late preterms, 7.8% small for gestational age (SGA) and 81.2% adequate for gestational age (AGA). Mean gestational age was 35.6±1.9 and 39.3±1.0 weeks, respectively, for premature and term neonates. The erythrocytes indices and white blood cells increased from 34-36.9 to 37-41.9 weeks. Basophils and platelets remained constant during gestation. Premature neonates presented lower values of all blood cells, except for lymphocytes and eosinophils. SGA neonates presented higher values of hemoglobin, hematocrit and lower values of leukocytes, neutrophils, bands, segmented, eosinophils, monocytes and platelets. Male neonates presented similar values of erythrocytes and hemoglobin and lower leukocytes, neutrophils, segmented and platelets. Neonates delivered by C-section had lower values of red blood cells and platelets. Chronic or gestational hypertension induced lower number of platelets. CONCLUSIONS Blood cells increased during gestation, except for platelets and basophils. SGA neonates had higher hemoglobin and hematocrit values and lower leukocytes. Number of platelets was smaller in male SGAs, born by C-section and whose mothers had hypertension.
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21
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MacQueen BC, Christensen RD, Baer VL, Ward DM, Snow GL. Screening umbilical cord blood for congenital Iron deficiency. Blood Cells Mol Dis 2019; 77:95-100. [PMID: 31005753 DOI: 10.1016/j.bcmd.2019.04.005] [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: 04/06/2019] [Accepted: 04/06/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Small for gestational age infants (SGA), infants of diabetic mothers (IDM), and very low birth weight infants (VLBW) are at risk for congenital iron deficiency. We evaluated the iron status of SGA, IDM, and VLBW neonates at birth and sought mechanistic explanations in those with iron deficiency. METHODS This was a prospective study. If congenital iron deficiency was present, maternal iron studies were obtained. When neonates were two weeks old, their iron status was reevaluated. RESULTS Sixteen of 180 neonates screened were iron deficient at birth. The Body Mass Index of the 16 mothers was high. These mothers often had mild iron deficiency and measurable hepcidin levels. Two weeks after birth, neonates had improved iron measurements. CONCLUSIONS Among SGA, IDM, and VLBW neonates, maternal obesity is a risk factor for congenital iron deficiency. We speculate that elevated hepcidin levels in obese pregnant women impede iron absorption and interfere with transplacental iron transfer.
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Affiliation(s)
- Brianna C MacQueen
- Department of Pediatrics, Division of Neonatology, University of Utah Health, Salt Lake City, UT, USA.
| | - Robert D Christensen
- Department of Pediatrics, Division of Neonatology, University of Utah Health, Salt Lake City, UT, USA; Women and Newborn's Clinical Program, Intermountain Healthcare, Murray, UT, USA; Department of Pediatrics, Division of Hematology/Oncology, University of Utah Health, Salt Lake City, UT, USA
| | - Vickie L Baer
- Women and Newborn's Clinical Program, Intermountain Healthcare, Murray, UT, USA
| | - Diane M Ward
- Department of Pathology, University of Utah Health, Salt Lake City, UT, USA
| | - Gregory L Snow
- The Statistical Data Center, Intermountain Healthcare, Salt Lake City, UT, USA
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Greer R, Safarulla A, Koeppel R, Aslam M, Bany-Mohammed FM. Can Fetal Umbilical Venous Blood Be a Reliable Source for Admission Complete Blood Count and Culture in NICU Patients? Neonatology 2019; 115:49-58. [PMID: 30300890 PMCID: PMC6621551 DOI: 10.1159/000491993] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 07/10/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Minimizing initial neonatal blood draws and their associated pain is important. The placenta has ample fetal blood that is otherwise discarded; obtaining admission laboratory evaluations from fetal umbilical venous blood (FUVB) may provide a suitable alternative. OBJECTIVE We hypothesized that obtaining an aerobic bacterial blood culture (BCX) and a complete blood count with manual differential (CBC/diff) from FUVB is feasible and yields results comparable to those obtained directly from the neonate. STUDY DESIGN BCX and CBC/diff were attempted on paired samples from FUVB (in the delivery room) and neonatal blood (shortly after NICU admission) of 110 patients. The paired t test, Pearson's correlation coefficient (R), and multivariable linear regression were used for data analysis. RESULTS Positive BCXs were found in 9 of 108 FUVB samples compared to 1 of 91 neonatal samples. Three out of 9 FUVB cultures were true pathogens, including 2 Escherichia coli and 1 viridans group streptococcus, all with negative corresponding paired neonatal cultures. There was 1 positive neonatal BCX, E. coli, with a negative paired FUVB culture. Neonatal hemoglobin (Hb), platelets (PLT), and white blood cells (WBC) all significantly (p < 0.0001) correlated with the paired FUVB samples (R = 0.50, 0.49, and 0.84, respectively). Hb, PLT, and WBC values were clinically comparable but statistically higher in neonatal blood (the differences were 2.3 g/dL, 30,000 cells/μL, and 2,800 cells/μL, respectively; p < 0.007 for all comparisons). CONCLUSIONS FUVB is suitable for obtaining CBC/diff. FUVB is an appropriate second source for BCX as it yields additional true pathogens. Our findings may support the presence of "culture-negative sepsis" in some neonates.
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Affiliation(s)
- Rocky Greer
- Division of Neonatology, Department of Pediatrics, University of California Irvine School of Medicine, Irvine, California, USA
| | - Azif Safarulla
- Division of Neonatology, Department of Pediatrics, University of California Irvine School of Medicine, Irvine, California, USA
| | - Robin Koeppel
- Neonatal Intensive Care Unit, University of California Irvine Medical Center, Orange, California, USA
| | - Muhammad Aslam
- Division of Neonatology, Department of Pediatrics, University of California Irvine School of Medicine, Irvine, California, USA
| | - Fayez M Bany-Mohammed
- Division of Neonatology, Department of Pediatrics, University of California Irvine School of Medicine, Irvine, California,
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23
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Aysola AE, Duque MA, Williams P, Alissa R. Comparison of heel stick sample with placental blood sample for pretransfusion testing. Transfusion 2018; 58:2227-2231. [PMID: 30153354 DOI: 10.1111/trf.14792] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Revised: 02/09/2018] [Accepted: 03/25/2018] [Indexed: 11/26/2022]
Abstract
BACKGROUND Published studies demonstrate that placental blood samples provide acceptable results for various laboratory tests, but these studies did not include pretransfusion testing. The aim of this study was to show concordance between heel stick and placental blood sample pairs for pretransfusion testing and to validate tube and gel method for placental samples. Using placental blood samples for pretransfusion testing potentially reduces the amount of blood collected from newborns for initial laboratory tests. STUDY DESIGN AND METHODS Placental samples were collected for pretransfusion tests at birth from 32 newborns with less than 2000 g birthweight and less than 35 weeks to compare the results with the heel stick samples from the same newborns. ABO and D typing, direct antiglobulin test (DAT) with IgG, and antibody screen tests were performed on these sample pairs. For ABO and D typing both tube and gel methods were used to validate both methods for the placental samples. RESULTS This study shows 100% concordance in 32 sample pairs for ABO, D, and DAT tests. Antibody screen results were compared on 29 sample pairs. All 28 sample pairs were concordant, but one placental blood sample was more sensitive to detect a weak maternal antibody than its corresponding heel stick sample was. CONCLUSION The results of this study validated that placental blood samples can be used in place of heel stick samples and are suitable for pretransfusion testing. This study also validated ABO and D typing by tube and gel methods for placental samples.
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Affiliation(s)
- Agnes E Aysola
- Department of Pathology and Laboratory Medicine, Department of Pediatrics, University of Florida, College of Medicine, Jacksonville, Florida
| | - Miriam Andrea Duque
- Department of Pathology and Laboratory Medicine, Department of Pediatrics, University of Florida, College of Medicine, Jacksonville, Florida
| | - Patty Williams
- Department of Pathology and Laboratory Medicine, Department of Pediatrics, University of Florida, College of Medicine, Jacksonville, Florida
| | - Rana Alissa
- Department of Pathology and Laboratory Medicine, Department of Pediatrics, University of Florida, College of Medicine, Jacksonville, Florida
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Cervantes LL, Zuñiga JA. Strategies to Avoid Neonatal Blood Transfusions for Families of the Jehovah's Witness Faith. Nurs Womens Health 2018; 22:332-337. [PMID: 30077239 DOI: 10.1016/j.nwh.2018.05.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2017] [Revised: 02/14/2018] [Accepted: 03/01/2018] [Indexed: 06/08/2023]
Abstract
Beliefs and restrictions regarding acceptance of blood products by members of the Jehovah's Witness faith often provoke discussion among health care professionals regarding alternative interventions. Establishing and maintaining an open dialog with women and families of the Jehovah's Witness faith regarding their beliefs on the use of blood and blood products are vital in creating a therapeutic relationship between families and the health care team. Such rapport facilitates the discussion of strategies to avoid blood transfusions for newborns and provides women and families multiple opportunities to develop of a holistic birth plan congruent with their beliefs.
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Iskander IF, Salama KM, Gamaleldin RM, Seghatchian J. Neonatal RBC transfusions: Do benefits outweigh risks? Transfus Apher Sci 2018; 57:431-436. [DOI: 10.1016/j.transci.2018.05.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/16/2022]
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26
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Comparison of Placental and Neonatal Admission Complete Blood Cell Count and Blood Cultures. Adv Neonatal Care 2018; 18:215-222. [PMID: 29578894 DOI: 10.1097/anc.0000000000000482] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND The utilization of placental blood for neonatal admission laboratory tests, specifically the complete blood cell (CBC) count and blood culture, has the potential to delay the onset of anemia of prematurity and intraventricular hemorrhage, frequency of blood transfusions and associated complications, and painful procedures related to laboratory sampling. PURPOSE To determine the feasibility of drawing neonatal admission laboratory tests from the placenta rather than the neonate and to compare CBC count and blood culture results. METHODS All infants less than 35 weeks' gestational age and all term infants with a maternal history of chorioamnionitis or untreated, positive group B Streptococcus status were eligible to participate. Participating infants had paired CBC count and blood cultures obtained from the placenta and the infant. RESULTS All CBC count outcomes were significantly, positively correlated between placental and infant blood (all Ps < .05). The paired white blood cells, neutrophils, and lymphocytes were strongly correlated (r = 0.761, r = 0.797, and r = 0.815, respectively), whereas the hemoglobin, hematocrit, platelet, and eosinophils were moderately correlated (r = 0.554, r = 0.545, r = 0.563, and r = 0.478, respectively). Monocytes and basophils were only weakly correlated (r = 0.373 and r = 0.217, respectively). There were 13 (93%) pairs where placental blood culture was positive but the direct infant draw blood culture was negative, and 1 (7%) pair where the placental culture was negative but the direct infant draw blood culture was positive. IMPLICATIONS FOR PRACTICE The results of this and other studies suggest that placental blood can be reliably used to obtain neonatal admission CBC count and blood cultures. IMPLICATIONS FOR RESEARCH Further research is needed regarding the prevention of blood culture contamination, especially in vaginally delivered placentas. Institutions that adopt this procedure should perform quality improvement initiatives to monitor outcomes and add to the growing body of literature on the utilization of placental blood for neonatal admission laboratory tests.
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Crighton GL, New HV, Liley HG, Stanworth SJ. Patient blood management, what does this actually mean for neonates and infants? Transfus Med 2018; 28:117-131. [PMID: 29667253 DOI: 10.1111/tme.12525] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Revised: 03/08/2018] [Accepted: 03/12/2018] [Indexed: 12/18/2022]
Abstract
Patient blood management (PBM) refers to an evidence-based package of care that aims to improve patient outcomes by optimal use of transfusion therapy, including managing anaemia, preventing blood loss and improving anaemia tolerance in surgical and other patients who may need transfusion. In adults, PBM programmes are well established, yet the definition and implementation of PBM in neonates and children lags behind. Neonates and infants are frequently transfused, yet they are often under-represented in transfusion trials. Adult PBM programmes may not be directly applicable to these populations. We review the literature in neonatal (and applicable paediatric) transfusion medicine and propose specific neonatal PBM definitions and elements.
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Affiliation(s)
- G L Crighton
- Royal Children's Hospital, Melbourne, Victoria, Australia
- Department of Epidemiology and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - H V New
- Clinical Research, NHS Blood and Transplant, London, UK
- Centre for Haematology, Imperial College, London, UK
| | - H G Liley
- Neonatology, Mater Mothers' Hospital, Brisbane, Queensland, Australia
- Mater Medical Research Institute, Brisbane, Queensland, Australia
| | - S J Stanworth
- Clinical Haematology, John Radcliffe Hospital, NHS Blood and Transplant Oxford, Oxford, UK
- Haematology, Oxford University Hospitals NHS Foundation Trust, Oxford, UK
- Radcliffe Department of Medicine, University of Oxford, and Oxford BRC Haematology Theme, Oxford, UK
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Moore SP, Newberry DM, Jnah AJ. Use of Placental/Umbilical Blood Sampling for Neonatal Admission Blood Cultures: Benefits, Challenges, and Strategies for Implementation. Neonatal Netw 2018; 36:152-159. [PMID: 28494827 DOI: 10.1891/0730-0832.36.3.152] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Placental blood remains an underused resource for early neonatal care despite ample evidence that placental blood provides the same clinical decision making information without the need for painful, invasive blood sampling procedures. Potential benefits of placental/umbilical blood sampling (PUBS) for neonatal admission labs include decreases in pain reactivity, rates of anemia, need for blood transfusions, use of vasopressors, and rates of intraventricular hemorrhage. Here, we present a unique case study of a critically ill infant with contradictory blood culture results from PUBS and direct infant sampling. A negative admission direct sample blood culture result compared with a positive admission PUBS blood culture result suggests that infection may have been missed in the direct infant sample. Relevant placental embryology and circulation is also described, as well as the benefits of PUBS for neonatal admission labs (with focus on the blood culture), challenges associated with PUBS practice, and strategies for implementation of PUBS.
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Carroll PD, Livingston E, Baer VL, Karkula K, Christensen RD. Evaluating Otherwise-Discarded Umbilical Cord Blood as a Source for a Neonate's Complete Blood Cell Count at Various Time Points. Neonatology 2018; 114:82-86. [PMID: 29719291 DOI: 10.1159/000488024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2017] [Accepted: 02/28/2018] [Indexed: 11/19/2022]
Abstract
BACKGROUND Previous studies have reported the use of cord blood for admission laboratory complete blood counts (CBCs). However, no studies have investigated its stability for the first 30 min after delivery. OBJECTIVES We quantified blood cells drawn from the umbilical vein to determine the effect of (1) the time after placental delivery, and (2) the site of blood sampling (umbilical vein on an isolated cord segment vs. umbilical vein on the placental surface). METHODS Timed phlebotomies were drawn at 2, 10, and 30 min from (1) the umbilical vein on an isolated, double-clamped cord segment, and (2) the umbilical vein near or on the placental surface. Leukocyte count, hemoglobin, platelet count, and fibrinogen were measured on each phlebotomy sample. RESULTS Blood drawn from the isolated umbilical cord segments had leukocyte count, hemoglobin, platelet count, and fibrinogen that remained unchanged between the phlebotomies at 2, 10, and 30 min after delivery. However, blood drawn from the umbilical vein on the placental surface had, at 30 min, a leukocyte count (p = 0.002), hemoglobin (p = 0.01), and platelet count (p = 0.001) that were statistically different from the values at 2 and 10 min after delivery. There was no difference in fibrinogen at 2, 10, or 30 min. CONCLUSIONS If cord blood is used for a neonate's initial CBC, the blood should be drawn within 10 min of the placental delivery when it is taken from the umbilical vein on or near the placenta. If an umbilical cord segment is obtained, the phlebotomy can be delayed for up to 30 min.
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Affiliation(s)
- Patrick D Carroll
- Women and Newborn's Clinical Program, Intermountain Healthcare, Salt Lake City, Utah, USA.,Dixie Regional Medical Center, St. George, Utah, USA
| | | | - Vickie L Baer
- Women and Newborn's Clinical Program, Intermountain Healthcare, Salt Lake City, Utah, USA
| | - Kerby Karkula
- Dixie Regional Medical Center, St. George, Utah, USA
| | - Robert D Christensen
- Women and Newborn's Clinical Program, Intermountain Healthcare, Salt Lake City, Utah, USA.,Divisions of Neonatology and Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah, USA
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MacQueen BC, Christensen RD, Ward DM, Bennett ST, O’Brien EA, Sheffield MJ, Baer VL, Snow GL, Lewis KAW, Fleming RE, Kaplan J. The iron status at birth of neonates with risk factors for developing iron deficiency: a pilot study. J Perinatol 2017; 37:436-440. [PMID: 27977019 PMCID: PMC5389916 DOI: 10.1038/jp.2016.234] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Revised: 10/25/2016] [Accepted: 11/07/2016] [Indexed: 01/28/2023]
Abstract
OBJECTIVE Small-for-gestational-age (SGA) neonates, infants of diabetic mothers (IDM) and very-low-birth weight premature neonates (VLBW) are reported to have increased risk for developing iron deficiency and possibly associated neurocognitive delays. STUDY DESIGN We conducted a pilot study to assess iron status at birth in at-risk neonates by measuring iron parameters in umbilical cord blood from SGA, IDM, VLBW and comparison neonates. RESULTS Six of the 50 infants studied had biochemical evidence of iron deficiency at birth. Laboratory findings consistent with iron deficiency were found in one SGA, one IDM, three VLBW, and one comparison infant. None of the infants had evidence of iron deficiency anemia. CONCLUSIONS Evidence of biochemical iron deficiency at birth was found in 17% of screened neonates. Studies are needed to determine whether these infants are at risk for developing iron-limited erythropoiesis, iron deficiency anemia or iron-deficient neurocognitive delay.
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Affiliation(s)
- BC MacQueen
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - RD Christensen
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA,Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA,Division of Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - DM Ward
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - ST Bennett
- Department of Pathology, Intermountain Medical Center, Murray, KY, USA
| | - EA O’Brien
- Division of Neonatology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA,Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - MJ Sheffield
- Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - VL Baer
- Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - GL Snow
- Statistical Data Center, LDS Hospital, Salt Lake City, UT, USA
| | - KA Weaver Lewis
- Women and Newborn’s Clinical Program, Intermountain Healthcare, Salt Lake City, UT, USA
| | - RE Fleming
- Department of Pediatrics and Edward A. Doisy Department of Biochemistry and Molecular Biology, St Louis University, St Louis, MO, USA
| | - J Kaplan
- Department of Pathology, University of Utah School of Medicine, Salt Lake City, UT, USA
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Safarulla A. A review of benefits of cord milking over delayed cord clamping in the preterm infant and future directions of research. J Matern Fetal Neonatal Med 2017; 30:2966-2973. [DOI: 10.1080/14767058.2016.1269319] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Azif Safarulla
- Department of Pediatrics, Augusta University, Augusta, GA, USA
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New HV, Berryman J, Bolton-Maggs PHB, Cantwell C, Chalmers EA, Davies T, Gottstein R, Kelleher A, Kumar S, Morley SL, Stanworth SJ. Guidelines on transfusion for fetuses, neonates and older children. Br J Haematol 2016; 175:784-828. [DOI: 10.1111/bjh.14233] [Citation(s) in RCA: 173] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Helen V. New
- NHS Blood and Transplant; London UK
- Imperial College Healthcare NHS Trust; London UK
| | | | | | | | | | | | - Ruth Gottstein
- St. Mary's Hospital; Manchester/University of Manchester; Manchester UK
| | | | - Sailesh Kumar
- Mater Research Institute; University of Queensland; Brisbane Australia
| | - Sarah L. Morley
- Addenbrookes Hospital/NHS Blood and Transplant; Cambridge UK
| | - Simon J. Stanworth
- Oxford University Hospitals NHS Trust/NHS Blood and Transplant; Oxford UK
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Elevated fecal calprotectin levels during necrotizing enterocolitis are associated with activated neutrophils extruding neutrophil extracellular traps. J Perinatol 2016; 36:862-9. [PMID: 27388941 PMCID: PMC5045760 DOI: 10.1038/jp.2016.105] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2015] [Revised: 03/30/2016] [Accepted: 04/05/2016] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Neonates with necrotizing enterocolitis (NEC) have higher calprotectin levels in stool than do healthy neonates. However, it is not known whether high stool calprotectin at the onset of bowel symptoms identifies neonates who truly have NEC vs other bowel disorders. STUDY DESIGN Neonates were eligible for this study when an x-ray was ordered to 'rule-out NEC'. Stool calprotectin was quantified at that time and in a follow-up stool. Each episode was later categorized as NEC or not NEC. The location of calprotectin in the bowel was determined by immunohistochemistry. RESULTS Neonates with NEC had higher initial and follow-up stool calprotectin levels than did neonates without NEC. Calprotectin in bowel from neonates with NEC was within neutrophil extracellular traps (NETs). CONCLUSION At the onset of signs concerning for NEC, fecal calprotectin is likely to be higher in neonates with NEC. Calprotectin in their stools is exported from neutrophils via NETs.
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Neary E, McCallion N, Kevane B, Cotter M, Egan K, Regan I, Kirkham C, Mooney C, Coulter-Smith S, Ní Áinle F. Coagulation indices in very preterm infants from cord blood and postnatal samples. J Thromb Haemost 2015; 13:2021-30. [PMID: 26334448 DOI: 10.1111/jth.13130] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2014] [Accepted: 08/22/2015] [Indexed: 11/30/2022]
Abstract
BACKGROUND Very premature infants are at high risk of bleeding complications; however, few data exist on ranges for standard coagulation tests. OBJECTIVES The primary objective of this study was to measure standard plasma coagulation tests and thrombin generation in very premature infants compared with term infants. The secondary objective was to evaluate whether an association existed between coagulation indices and intraventricular hemorrhage (IVH). PATIENTS/METHODS Cord and peripheral blood of neonates < 30 weeks gestational age (GA) was drawn at birth, on days 1 and 3 and fortnightly until 30 weeks corrected gestational age. Prothrombin time (PT), activated partial thromboplastin time (APTT), fibrinogen and coagulation factor levels were measured and tissue factor-stimulated thrombin generation was characterized. Control plasma was obtained from cord blood of term neonates. RESULTS One hundred and sixteen infants were recruited. Median (range) GA was 27.7 (23.7-29.9) weeks and mean (SD) birth weight was 1020 (255) g. Median (5th-95th percentile) day 1 PT, APTT and fibrinogen were 17.5 (12.7-26.6) s, 78.7 (48.7-134.3) s and 1.4 (0.72-3.8) g L(-1) , respectively. No difference in endogenous thrombin potential between preterm and term plasma was observed, where samples were available. Levels of coagulation factors II, VII, IX and X, protein C, protein S and antithrombin were reduced in preterm compared with term plasma. Day 1 APTT and PT were not associated with IVH. CONCLUSION In the largest cross-sectional study to date of very preterm infants, typical ranges for standard coagulation tests were determined. Despite long clotting times, thrombin generation was observed to be similar in very preterm and term infants.
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Affiliation(s)
- E Neary
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
| | - N McCallion
- Department of Neonatology, Rotunda Hospital, Dublin, Ireland
- Department of Paediatrics, Royal College of Surgeons, Dublin, Ireland
| | - B Kevane
- Department of Haematology, Rotunda Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin (UCD) Conway Institute, Dublin, Ireland
| | - M Cotter
- Department of Haematology, Rotunda Hospital, Dublin, Ireland
- Department of Haematology, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
| | - K Egan
- School of Medicine and Medical Science, University College Dublin (UCD) Conway Institute, Dublin, Ireland
| | - I Regan
- Department of Haematology, Our Lady's Children's Hospital, Crumlin, Dublin, Ireland
| | - C Kirkham
- Department of Research, Rotunda Hospital, Dublin, Ireland
| | - C Mooney
- Department of Haematology, Rotunda Hospital, Dublin, Ireland
| | - S Coulter-Smith
- Department of Obstetrics and Gynaecology, Rotunda Hospital, Dublin, Ireland
| | - F Ní Áinle
- Department of Haematology, Rotunda Hospital, Dublin, Ireland
- School of Medicine and Medical Science, University College Dublin (UCD) Conway Institute, Dublin, Ireland
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Umbilical Cord Blood-An Untapped Resource: Strategies to Decrease Early Red Blood Cell Transfusions and Improve Neonatal Outcomes. Clin Perinatol 2015; 42:541-56. [PMID: 26250916 DOI: 10.1016/j.clp.2015.04.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Umbilical cord blood is a resource that is available to all neonates. Immediately after delivery of the fetus, cord blood can be used for the direct benefit of the premature infant. Delayed cord clamping and milking of the umbilical cord are 2 methods of transfusing additional fetal blood into the neonate after vaginal or cesarean delivery. Additionally, umbilical cord blood can be utilized for neonatal admission laboratory testing rather than direct neonatal phlebotomy. Together these strategies both increase initial neonatal total blood volume and limit immediate loss through phlebotomy.
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Carroll PD, Christensen RD. New and underutilized uses of umbilical cord blood in neonatal care. Matern Health Neonatol Perinatol 2015; 1:16. [PMID: 27057333 PMCID: PMC4823695 DOI: 10.1186/s40748-015-0017-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Accepted: 05/08/2015] [Indexed: 11/21/2022] Open
Abstract
Background In an era increasingly focused on quality improvement and cost containment, more emphasis is being placed on wiser utilization of medical care resources. One underutilized resource in early neonatal care is umbilical cord blood. Findings Umbilical cord blood can be utilized for admission laboratory studies in neonates thereby avoiding a significant phlebotomy event in the first minutes to hours of life. Additionally, umbilical cord blood can also be safely “transfused” into the neonate via delayed cord clamping or milking of the umbilical cord. This has been demonstrated to be particularly beneficial in premature infants by decreasing the rate of intraventricular hemorrhage. Delayed cord clamping has been formally endorsed by a number of medical societies, however it has not yet been universally adopted by obstetricians and neonatologists. Conclusions Both uses of umbilical cord blood for neonatal admission laboratory testing and delayed cord clamping/milking of the umbilical cord have resulted in decreased transfusion rates as well as other outcomes reviewed herein.
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Affiliation(s)
- Patrick D Carroll
- Women and Newborn's Program, Intermountain Healthcare, Salt Lake City, UT USA ; Neonatal Services, Dixie Regional Medical Center, St. George, UT USA
| | - Robert D Christensen
- Women and Newborn's Program, Intermountain Healthcare, Salt Lake City, UT USA ; Division of Neonatology and Division of Hematology/Oncology, Department of Pediatrics, University of Utah School of Medicine and Primary Children's Hospital, Salt Lake City, UT USA
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Ruangkit C, Moroney V, Viswanathan S, Bhola M. Safety and efficacy of delayed umbilical cord clamping in multiple and singleton premature infants - A quality improvement study. J Neonatal Perinatal Med 2015; 8:393-402. [PMID: 26757008 DOI: 10.3233/npm-15915043] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
OBJECTIVES To evaluate the safety and efficacy of a quality improvement (QI) program of delayed umbilical cord clamping (DCC) in multiple and singleton preterm infants born at our center. METHODS After DCC protocol implementation, compliance and success rate were assessed. Clinical outcomes of selected 150 preterm infants <34 weeks gestation born in 2014 after protocol implementation (Epoch II) were compared to those of preterm infants born in 2013 before protocol implementation (Epoch I). RESULTS Overall protocol compliance rate was 92% (246/267). DCC was successfully performed in 77% (205/267) after protocol implementation. There were higher multiple births in Epoch II compared to Epoch I (27.3 vs. 15.3% , p < 0.01). At birth, infants in Epoch II had significantly decreased need for intubation in delivery room (23.3 vs. 39.3% , p < 0.01), had higher hematocrit (46.4±7.3 vs. 44.0±7.1% , p < 0.01) and less metabolic acidosis (base excess -4.1±2.7 vs. -5.3±4.2 mmol/L, p < 0.01) compared to those born in Epoch I. During hospital stay, fewer infants in Epoch II received rescue surfactant therapy (45.3 vs. 56.7% , p = 0.05), medical treatment for PDA (6.7 vs. 16.6% , p = 0.04%) and red blood cell transfusions (20.7 VS. 32.0% , p < 0.01) compared to Epoch I. CONCLUSIONS Protocol-guided practice of DCC for 30 seconds can be safely performed in multiple and singleton preterm infants. In addition to higher initial hematocrit, infants in our QI project had lower need for delivery room resuscitation and less metabolic acidosis at birth. We also observed decreased need for rescue surfactant therapy, medical treatment for PDA and red blood cell transfusions after DCC protocol implementation.
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Christensen RD, Baer VL, Del Vecchio A, Henry E. Unique risks of red blood cell transfusions in very-low-birth-weight neonates: associations between early transfusion and intraventricular hemorrhage and between late transfusion and necrotizing enterocolitis. J Matern Fetal Neonatal Med 2014; 26 Suppl 2:60-3. [PMID: 24059555 DOI: 10.3109/14767058.2013.830495] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Red blood cell transfusions can be life-saving for neonates with severe anemia or active hemorrhage. However, risks of transfusions exist and should always be weighed against potential benefits. At least two transfusion risks are unique to very low birth weight neonates. The first is an association between transfusions given in the first days after birth and the subsequent occurrence of a grade 3 or 4 intraventricular hemorrhage. The second is an association between "late" RBC transfusions and the subsequent occurrence of necrotizing enterocolitis. Much remains to be discovered about the pathogenesis of these two outcomes. Moreover, work is needed to clearly establish whether transfusions are causatively-associated with these outcomes or are co-variables. This review will provide basic data establishing these associations and propose mechanistic explanations.
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Affiliation(s)
- Robert D Christensen
- Women and Newborns Program, Intermountain Healthcare , Salt Lake City, UT , USA and
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ANALYSIS OF PHLEBOTOMY BLOOD LOSSES IN NEONATES IN A TERTIARY CARE HOSPITAL. INDIAN JOURNAL OF CHILD HEALTH 2014. [DOI: 10.32677/ijch.2014.v01.i01.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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von Lindern JS, Lopriore E. Management and prevention of neonatal anemia: current evidence and guidelines. Expert Rev Hematol 2014; 7:195-202. [DOI: 10.1586/17474086.2014.878225] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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Christensen RD, Carroll PD, Josephson CD. Evidence-based advances in transfusion practice in neonatal intensive care units. Neonatology 2014; 106:245-53. [PMID: 25300949 DOI: 10.1159/000365135] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
BACKGROUND Transfusions to neonates convey both benefits and risks, and evidence is needed to guide wise use. Such evidence is accumulating, but more information is needed to generate sound evidence-based practices. OBJECTIVE We sought to analyze published information on nine aspects of transfusion practice in neonatal intensive care units. METHODS We assigned 'categories of evidence' and 'recommendations' using the format of the United States Preventive Services Task Force of the Agency for Healthcare Research and Quality. RESULTS The nine practices studied were: (1) delayed clamping or milking of the umbilical cord at preterm delivery - recommended, high/substantial A; (2) drawing the initial blood tests from cord/placental blood from very low birth weight (VLBW, <1,500 g) infants at delivery - recommended, moderate/moderate B; (3) limiting phlebotomy losses of VLBW infants - recommended, moderate/substantial B; (4) selected use of erythropoiesis-stimulating agents to prevent transfusions - recommended, moderate/moderate-moderate/small B, C; (5) using platelet mass, rather than platelet count, in platelet transfusion decisions - recommended, moderate/small C; (6) permitting the platelet count to fall to <20,000/µl in 'stable' neonates before transfusing platelets - recommended, low/small I; (8) permitting the platelet count to fall to <50,000/µl in 'unstable' neonates before transfusing platelets - recommended, moderate/small C, and (9) not performing routine coagulation test screening on every VLBW infant - recommended, moderate/small C. CONCLUSIONS We view these recommendations as dynamic, to be revised as additional evidence becomes available. We predict this list will expand as new studies provide more information to guide best transfusion practices.
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Whole-blood viscosity in the neonate: effects of gestational age, hematocrit, mean corpuscular volume and umbilical cord milking. J Perinatol 2014; 34:16-21. [PMID: 24030677 DOI: 10.1038/jp.2013.112] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2013] [Revised: 06/19/2013] [Accepted: 07/22/2013] [Indexed: 12/15/2022]
Abstract
OBJECTIVE The American College of Obstetrics and Gynecology Committee on Obstetric Practice recently endorsed delayed cord clamping at preterm delivery. However, the committee report expressed the concern by some practitioners that delayed clamping or cord milking might induce hyperviscosity in preterm neonates. To address this issue we: (1) established reference ranges for whole-blood viscosity among preterm neonates (viscosity reference ranges had previously been reported only in term neonates) and (2) determined the effect of umbilical cord milking at deliveries <32 weeks gestation on subsequent blood viscosity measurements. STUDY DESIGN This was a prospective study in two Neonatal Intensive Care Units. Blood viscosity was measured using a cone and plate viscometer. Associations were sought with gestation, hematocrit/hemoglobin and mean corpuscular volume. Reference ranges were determined for preterm infants <32 weeks gestation. Then, after umbilical cord milking at deliveries <32 weeks, viscosity was measured at birth and again during the 12 h after birth. In neonates with viscosities >95th % range, we sought signs of hyperviscosity (plethora, hypotonia, hypoglycemia, hyperbilirubinemia, thrombocytopenia). RESULT Viscosity at higher and lower sheer rates were linearly related (n=32, r=0.971). Within the range of hematocrits measured (29-63%) viscosity correlated with hematocrit (r=0.877) and hemoglobin (r=0.853) but not with erythrocyte size (r=0.179). Viscosity was related to gestational age (n=58), primarily due to the lower hematocrits at lower gestational ages. In the 12 h after cord milking viscosity ranged from 3.1 to 9.5 centipoise. Three of twenty preterm, neonates had viscosities >95th % reference range. However, all values were well below those where hyperviscosity is defined in term neonates and all lacked features of hyperviscosity. CONCLUSION Cord blood viscosity is directly proportional to hematocrit/hemoglobin, lower at early gestation and not associated with erythrocyte size. Cord milking at preterm delivery is associated with a low risk of clinical hyperviscosity. Practioners should not refrain from cord milking at preterm delivery because of a concern that it will commonly cause neonatal hyperviscosity.
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Christensen RD, Baer VL, Lambert DK, Henry E, Ilstrup SJ, Bennett ST. Reference intervals for common coagulation tests of preterm infants (CME). Transfusion 2013; 54:627-32:quiz 626. [DOI: 10.1111/trf.12322] [Citation(s) in RCA: 61] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 05/15/2013] [Accepted: 05/22/2013] [Indexed: 12/23/2022]
Affiliation(s)
- Robert D. Christensen
- Women and Newborns Clinical Program; Intermountain Healthcare; Salt Lake City Utah
- McKay-Dee Hospital Center; Ogden Utah
- Institute for Healthcare Delivery Research; Salt Lake City Utah
- Transfusion Medicine and Clinical Pathology Programs Intermountain Medical Center; Murray Utah
| | - Vickie L. Baer
- Women and Newborns Clinical Program; Intermountain Healthcare; Salt Lake City Utah
- McKay-Dee Hospital Center; Ogden Utah
- Institute for Healthcare Delivery Research; Salt Lake City Utah
- Transfusion Medicine and Clinical Pathology Programs Intermountain Medical Center; Murray Utah
| | - Diane K. Lambert
- Women and Newborns Clinical Program; Intermountain Healthcare; Salt Lake City Utah
- McKay-Dee Hospital Center; Ogden Utah
- Institute for Healthcare Delivery Research; Salt Lake City Utah
- Transfusion Medicine and Clinical Pathology Programs Intermountain Medical Center; Murray Utah
| | - Erick Henry
- Women and Newborns Clinical Program; Intermountain Healthcare; Salt Lake City Utah
- McKay-Dee Hospital Center; Ogden Utah
- Institute for Healthcare Delivery Research; Salt Lake City Utah
- Transfusion Medicine and Clinical Pathology Programs Intermountain Medical Center; Murray Utah
| | - Sarah J. Ilstrup
- Women and Newborns Clinical Program; Intermountain Healthcare; Salt Lake City Utah
- McKay-Dee Hospital Center; Ogden Utah
- Institute for Healthcare Delivery Research; Salt Lake City Utah
- Transfusion Medicine and Clinical Pathology Programs Intermountain Medical Center; Murray Utah
| | - Sterling T. Bennett
- Women and Newborns Clinical Program; Intermountain Healthcare; Salt Lake City Utah
- McKay-Dee Hospital Center; Ogden Utah
- Institute for Healthcare Delivery Research; Salt Lake City Utah
- Transfusion Medicine and Clinical Pathology Programs Intermountain Medical Center; Murray Utah
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Christensen RD, Baer VL, Lambert DK, Ilstrup SJ, Eggert LD, Henry E. Association, among very-low-birthweight neonates, between red blood cell transfusions in the week after birth and severe intraventricular hemorrhage. Transfusion 2013; 54:104-8. [DOI: 10.1111/trf.12234] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 03/25/2013] [Accepted: 03/27/2013] [Indexed: 12/01/2022]
Affiliation(s)
- Robert D. Christensen
- Women and Newborns Program; the Institute for Healthcare Delivery Research; Transfusion Medicine Services; Intermountain Healthcare; Ogden Murray St. George Salt Lake City Utah
| | - Vickie L. Baer
- Women and Newborns Program; the Institute for Healthcare Delivery Research; Transfusion Medicine Services; Intermountain Healthcare; Ogden Murray St. George Salt Lake City Utah
| | - Diane K. Lambert
- Women and Newborns Program; the Institute for Healthcare Delivery Research; Transfusion Medicine Services; Intermountain Healthcare; Ogden Murray St. George Salt Lake City Utah
| | - Sarah J. Ilstrup
- Women and Newborns Program; the Institute for Healthcare Delivery Research; Transfusion Medicine Services; Intermountain Healthcare; Ogden Murray St. George Salt Lake City Utah
| | - Larry D. Eggert
- Women and Newborns Program; the Institute for Healthcare Delivery Research; Transfusion Medicine Services; Intermountain Healthcare; Ogden Murray St. George Salt Lake City Utah
| | - Erick Henry
- Women and Newborns Program; the Institute for Healthcare Delivery Research; Transfusion Medicine Services; Intermountain Healthcare; Ogden Murray St. George Salt Lake City Utah
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