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Christensen RD, Bahr TM, Ohls RK, Ilstrup SJ, Moise KJ, Lopriore E, Meznarich JA. Erythrokinetic mechanism(s) causing the "late anemia" of hemolytic disease of the fetus and newborn. J Perinatol 2024; 44:916-919. [PMID: 38216678 DOI: 10.1038/s41372-024-01872-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Revised: 12/19/2023] [Accepted: 01/04/2024] [Indexed: 01/14/2024]
Abstract
A transfusion-requiring "late anemia" can complicate the management of neonates convalescing from hemolytic disease of the fetus and newborn (HDFN). This anemia can occur in any neonate after HDFN but is particularly prominent in those who received intrauterine transfusions and/or double-volume exchange transfusions. Various reports describe this condition as occurring based on ongoing hemolysis, either due to passive transfer of alloantibody through breast milk or persistence of antibody not removed by exchange transfusion. However, other reports describe this condition as the result of inadequate erythrocyte production. Both hypotheses might have merit, because perhaps; (1) some cases are primarily due to continued hemolysis, (2) others are primarily hypoproductive, and (3) yet others result from a mixture of these two mechanisms. We propose prospective collaborative studies that will resolve this issue by serially quantifying end-tidal carbon monoxide. Doing this will better inform the assessment and treatment of neonates recovering from HDFN.
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Affiliation(s)
- Robert D Christensen
- Women and Newborns Research, Intermountain Health, Murray, UT, USA.
- Division of Neonatology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA.
| | - Timothy M Bahr
- Women and Newborns Research, Intermountain Health, Murray, UT, USA
- Division of Neonatology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
| | - Robin K Ohls
- Division of Neonatology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
| | - Sarah J Ilstrup
- Transfusion Medicine, Department of Pathology, Intermountain Health, Murray, UT, USA
| | - Kenneth J Moise
- Comprehensive Fetal Care Center at Dell Children's Medical Center and Department of Women's Health, Dell Medical School, Austin, TX, USA
| | - Enrico Lopriore
- Division of Neonatology, Leiden University Medical Centre, Leiden, Netherlands
| | - Jessica A Meznarich
- Division of Hematology/Oncology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
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Cheng X, Lin B, Yang Y, Yu Y, Fu Y, Yang C. End-tidal carbon monoxide concentrations measured within 48 hours of birth predict hemolytic hyperbilirubinemia. J Perinatol 2024; 44:897-901. [PMID: 38627593 DOI: 10.1038/s41372-024-01967-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2024] [Revised: 04/04/2024] [Accepted: 04/08/2024] [Indexed: 06/09/2024]
Abstract
OBJECTIVES To determine, among neonates at-risk for hyperbilirubinemia, whether measuring end-tidal carbon monoxide concentration (ETCOc) twice before 48 hours could identify those who would develop hyperbilirubinemia and differentiate hemolytic vs. non-hemolytic causes. METHODS Prospective study on neonates meeting criteria "at-risk for hyperbilirubinemia." Routine bilirubin measurements and 10-day follow-up were used to categorize neonates as; (1) normal (no hyperbilirubinemia, all bilirubins <95th percentile of Bhutani nomogram), (2) having hemolytic hyperbilirubinemia (bilirubin ≥95th percentile, DAT+, elevated retic, or G6PD+), or (3) having non-hemolytic hyperbilirubinemia. RESULTS 386 neonates were enrolled. 321 (83%) did not develop hyperbilirubinemia and 65 (17%) did, of which 29 were judged hemolytic and 36 non-hemolytic. High ETCOc differentiated the hemolytic group (p < 0.001). First-day ETCOc correlated with bilirubin and with reticulocyte count (r = 0.896 and 0.878) and sensitivity and specificity for predicting hyperbilirubinemia were excellent (83% and 95%). CONCLUSIONS ETCO measurement in the first 48 hours after birth predicts hemolytic hyperbilirubinemia.
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Affiliation(s)
- Xiaoqin Cheng
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China
| | - Bingchun Lin
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China
| | - Yong Yang
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China
| | - Yanliang Yu
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China
| | - Yongping Fu
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China
| | - Chuanzhong Yang
- Department of Neonatology, Shenzhen Maternity and Child Healthcare Hospital, The First School of Clinical Medicine, Southern Medical University, Shenzhen, Guangdong, China.
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Christensen RD, Bahr TM, Wong RJ, Vreman HJ, Bhutani VK, Stevenson DK. A "Gold Standard" Test for Diagnosing and Quantifying Hemolysis in Neonates and Infants. J Perinatol 2023; 43:1541-1547. [PMID: 37468612 DOI: 10.1038/s41372-023-01730-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 07/03/2023] [Accepted: 07/11/2023] [Indexed: 07/21/2023]
Abstract
Identifying "gold standard" diagnostic tests can promote evidence-based neonatology practice. Hemolysis is a pathological shortening of the erythrocyte lifespan, differing from erythrocyte senescence in responsible mechanisms and clinical implications. Diagnosing hemolysis goes beyond a binary (yes vs. no) determination. It is characterized according to magnitude, and as acute vs. chronic, and genetically based vs. not. For neonates with significant hyperbilirubinemia or anemia, detecting hemolysis and quantifying its magnitude provides diagnostic clarity. The 2022 American Academy of Pediatrics (AAP) Clinical Practice Guideline on management of hyperbilirubinemia in the newborn states that hemolysis is a risk factor for developing significant hyperbilirubinemia and neurotoxicity. The guideline recommends identifying hemolysis from any cause, but specific guidance is not provided. A spectrum of laboratory tests has been endorsed as diagnostic methods for hemolysis. Herein we examine these laboratory tests and recommend one as the "gold standard" for diagnosing and quantifying hemolysis in neonates and infants.
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Affiliation(s)
- Robert D Christensen
- Division of Neonatology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA.
- Obstetric and Neonatal Operations, Intermountain Health, Salt Lake City, UT, USA.
| | - Timothy M Bahr
- Division of Neonatology, Department of Pediatrics, University of Utah, Salt Lake City, UT, USA
- Obstetric and Neonatal Operations, Intermountain Health, Salt Lake City, UT, USA
| | - Ronald J Wong
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Hendrik J Vreman
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - Vinod K Bhutani
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA, USA
| | - David K Stevenson
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University School of Medicine, Stanford, CA, USA
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Zhan YL, Peng HB, Jin ZC, Su JF, Tan XY, Zhao L, Zhang L. Higher ETCOc predicts longer phototherapy treatment in neonatal hyperbilirubinemia. Front Pediatr 2023; 11:1154350. [PMID: 37114002 PMCID: PMC10126460 DOI: 10.3389/fped.2023.1154350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2023] [Accepted: 03/23/2023] [Indexed: 04/29/2023] Open
Abstract
Objective This study aimed to evaluate the predictive performance of end-tidal carbon monoxide corrected to ambient carbon monoxide (ETCOc) values phototherapy in neonates with significant hyperbilirubinemia. Methods A prospective study was conducted on neonates with significant hyperbilirubinemia who received phototherapy between 3 and 7 days of life. The breath ETCOc and serum total bilirubin of the recruited infants were measured on admission. Results The mean ETCOc at admission in 103 neonates with significant hyperbilirubinemia was 1.70 ppm. The neonates were categorized into two groups: phototherapy duration ≤72 h (n = 87) and >72 h (n = 16) groups. Infants who received phototherapy for >72 h had significantly higher ETCOc (2.45 vs. 1.60, P = 0.001). The cutoff value of ETCOc on admission for predicting longer phototherapy duration was 2.4 ppm, with a sensitivity of 62.5% and specificity of 88.5%, yielding a 50% positive predictive value and a 92.7% negative predictive value. Conclusion ETCOc on admission can help predict the duration of phototherapy in neonates with hyperbilirubinemia, facilitate clinicians to judge disease severity, and make clinical communication easier and more efficient.
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Bao Y, Zhu J, Ma L, Zhang H, Sun L, Xu C, Wu J, He Y, Du L. An End-Tidal Carbon Monoxide Nomogram for Term and Late-Preterm Chinese Newborns. J Pediatr 2022; 250:16-21.e3. [PMID: 35835229 DOI: 10.1016/j.jpeds.2022.07.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 06/09/2022] [Accepted: 07/06/2022] [Indexed: 10/17/2022]
Abstract
OBJECTIVE To establish a reference nomogram for end-tidal CO corrected for ambient CO (ETCOc) levels in term and late-preterm Chinese newborns and then assess its efficacy to identify hemolytic hyperbilirubinemia. STUDY DESIGN We conducted a prospective study by measuring concurrent ETCOc and total serum bilirubin (TSB) or transcutaneous bilirubin (TcB) levels collected postnatally at 12, 24, 48, 72, 96, and 120 hours of age. ETCOc at the 25th, 50th, 75th, and 95th percentiles at each epoch were used to construct the reference nomogram. We then explored the ability of predischarge ETCOc and TSB/TcB metrics to predict the development of hyperbilirubinemia requiring phototherapy in early postnatal period and jaundice readmission in late postnatal period. RESULTS Our nomogram, based on 990 measurements from 455 infants who were not nonhemolytic, displayed a steady line within 3 postnatal days, followed by a subsequent decline. From a cohort of infants with a serial ETCOc measurements (n = 130) and those readmitted (n = 21), we found that ETCOc and TSB/TcB ≥75th percentile can identify most hemolytic hyperbilirubinemia between 12 and 72 hours after birth with an area under the curve (AUC) of 0.741. An ETCOc ≥1.7 ppm alone between 96 and 120 hours after birth can identify most hemolytic hyperbilirubinemia with an AUC of 0.816. In addition, 90.5% of readmitted infants had an ETCOc ≥75th percentile. CONCLUSIONS An ETCOc reference nomogram during the first 5 postnatal days in nonhemolytic term and late-preterm newborns can be used to identify hemolytic hyperbilirubinemia requiring phototherapy in the early postnatal period and readmission in the late postnatal period.
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Affiliation(s)
- Yingying Bao
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China; Department of Neonatology, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jiajun Zhu
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lixin Ma
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Hong Zhang
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ling Sun
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Chuncai Xu
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jingyuan Wu
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yuanyuan He
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lizhong Du
- Department of Neonatology, The Children's Hospital, Zhejiang University School of Medicine, Hangzhou, China; National Clinical Research Center for Child Health, Hangzhou, China
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Reference intervals for end-tidal carbon monoxide of preterm neonates. J Perinatol 2022; 42:116-120. [PMID: 34556800 DOI: 10.1038/s41372-021-01207-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/03/2021] [Accepted: 09/03/2021] [Indexed: 11/08/2022]
Abstract
OBJECTIVES We constructed reference intervals for end-tidal carbon monoxide (ETCOc) levels of neonates 28 0/7 to 34 6/7 weeks gestation in order to assess hemolytic rate. STUDY DESIGN This is a prospective four-NICU study in Bangkok, Thailand, and Utah, USA. RESULTS Of 226 attempted measurements, 92% were successful. Values from day 1 through 28 were charted and upper (>95th percentile) reference interval limits calculated. During the entire 28 days, the ETCOc upper reference intervals from babies in Bangkok were higher than those in Utah (p < 0.01). No differences were found due to sex, or earliest vs. latest gestation at birth (both p > 0.1). Similar to term neonates, preterm neonates in Bangkok and Utah had higher ETCOc values during the first 48 h after birth than thereafter (p < 0.01). CONCLUSIONS Using this methodology, and the reference interval chart, the hemolytic rate of preterm infants ≥28 weeks can be assessed.
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Bahr TM, Shakib JH, Stipelman CH, Kawamoto K, Lauer S, Christensen RD. Improvement Initiative: End-Tidal Carbon Monoxide Measurement in Newborns Receiving Phototherapy. J Pediatr 2021; 238:168-173.e2. [PMID: 34260896 DOI: 10.1016/j.jpeds.2021.07.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 07/01/2021] [Accepted: 07/07/2021] [Indexed: 01/13/2023]
Abstract
OBJECTIVES To determine, as part of our Utah Newborn Nursery Bilirubin Management Program, whether end-tidal carbon monoxide concentration (ETCOc) measurements in all newborns in our nursery receiving phototherapy were associated with outcomes related to the management of hyperbilirubinemia, including time (hours after birth) when phototherapy was initiated, total duration of phototherapy during the nursery stay, repeat phototherapy treatments, and hospital readmission for phototherapy. STUDY DESIGN We performed a planned interim analysis of a component of our program in which we measured ETCOc noninvasively using CoSense on each newborn in our nursery receiving phototherapy and recorded specific outcomes related to phototherapy management. RESULTS Of 1856 newborns admitted to our nursery in a 6-month period in 2020, 170 (9.8%) were treated with phototherapy. An ETCOc reading was successfully obtained in 145 of 151 attempts (96%). Higher ETCOc values were associated with earlier institution of phototherapy and longer duration of phototherapy. For every 1-ppm increase in ETCOc, phototherapy was started 9 hours earlier (95% CI, 3.3-14.8; P = .002) and was administered for an additional 9.3 hours (95% CI, 4.1-14.6; P < .001). Three newborns were readmitted to the hospital for intensive phototherapy; while in the nursery, all 3 had an elevated ETCOc (2.2, 2.6, and 2.9 ppm). CONCLUSIONS Our findings provide answers to questions raised in the 2004 American Academy of Pediatrics bilirubin guidelines. In our neonatal nursery, measuring ETCOc in all phototherapy recipients was feasible and safe, and the results were associated with multiple aspects of phototherapy management. Higher ETCOc values predicted earlier and longer phototherapy courses.
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Affiliation(s)
- Timothy M Bahr
- Division of Neonatology, Department of Pediatrics, University of Utah Health, Salt Lake City, UT.
| | - Julie H Shakib
- Division of General Pediatrics, Department of Pediatrics, University of Utah Health, Salt Lake City, UT
| | - Carole H Stipelman
- Division of General Pediatrics, Department of Pediatrics, University of Utah Health, Salt Lake City, UT
| | - Kensaku Kawamoto
- Department of Biomedical Informatics, University of Utah Health, Salt Lake City, UT
| | - Sarah Lauer
- Department of System Quality, University of Utah Health, Salt Lake City, UT
| | - Robert D Christensen
- Division of Neonatology, Department of Pediatrics, University of Utah Health, Salt Lake City, UT; Division of Hematology/Oncology, Department of Pediatrics, University of Utah Health, Salt Lake City, UT
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Pham YL, Beauchamp J. Breath Biomarkers in Diagnostic Applications. Molecules 2021; 26:molecules26185514. [PMID: 34576985 PMCID: PMC8468811 DOI: 10.3390/molecules26185514] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Revised: 09/07/2021] [Accepted: 09/08/2021] [Indexed: 02/06/2023] Open
Abstract
The detection of chemical compounds in exhaled human breath presents an opportunity to determine physiological state, diagnose disease or assess environmental exposure. Recent advancements in metabolomics research have led to improved capabilities to explore human metabolic profiles in breath. Despite some notable challenges in sampling and analysis, exhaled breath represents a desirable medium for metabolomics applications, foremost due to its non-invasive, convenient and practically limitless availability. Several breath-based tests that target either endogenous or exogenous gas-phase compounds are currently established and are in practical and/or clinical use. This review outlines the concept of breath analysis in the context of these unique tests and their applications. The respective breath biomarkers targeted in each test are discussed in relation to their physiological production in the human body and the development and implementation of the associated tests. The paper concludes with a brief insight into prospective tests and an outlook of the future direction of breath research.
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Affiliation(s)
- Y Lan Pham
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Straße 35, 85354 Freising, Germany;
- Department of Chemistry and Pharmacy, Chair of Aroma and Smell Research, Friedrich-Alexander-Universität Erlangen-Nürnberg, Henkestraße 9, 91054 Erlangen, Germany
| | - Jonathan Beauchamp
- Department of Sensory Analytics and Technologies, Fraunhofer Institute for Process Engineering and Packaging IVV, Giggenhauser Straße 35, 85354 Freising, Germany;
- Correspondence:
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