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Am J Perinatol 2022; 39(12): 1321-1325
DOI: 10.1055/s-0040-1722328
Original Article

Role of Cord Blood Carboxyhemoglobin in Detecting Significant Hyperbilirubinemia in Term Neonates with ABO Alloimmunization

Mahir Tıraş
1   Department of Pediatrics, Bağcılar Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
,
Emrah Can 
2   Department of Neonatology, Bağcılar Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
,
Şahin Hamilçıkan
2   Department of Neonatology, Bağcılar Training and Research Hospital, University of Health Sciences, Istanbul, Turkey
› Institutsangaben Funding None.
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Abstract

Objective This study aimed to assess whether cord blood carboxyhemoglobin (COHb) levels in jaundiced term neonates with and without a positive direct Coombs test (DCT) and in healthy controls could be used as a predictor of severe hyperbilirubinemia. The percentage of cord blood COHb should be higher among neonates with Coombs-positive ABO hemolytic disease than among those with Coombs-negative ABO incompatibility and higher than that of ABO-compatible control neonates.

Study Design This cross-sectional descriptive study of 198 term neonates comprised three subgroups: group I featured 68 DCT-positive ABO-incompatible neonates (ABO + DCT), group II featured 60 DCT-negative ABO-incompatible neonates with hyperbilirubinemia (ABO–DCT), and group III featured 70 healthy controls. COHb was determined by an OSM3 hemoximeter.

Results Group I differed from groups II and III for cord blood bilirubin, cord blood hemoglobin, and cord blood hematocrit. Groups I and II had higher mean total serum bilirubin (TSB) levels than group III, while there was no difference in the mean TSB levels between groups I and II. There was no significant difference between the COHb group means for groups I, II, and III (p = 0.98). The area under the receiver operating characteristic curve calculated for group I/group III and group II/group III were found to be 0.62 and 0.54, respectively.

Conclusion COHb levels did not prove to be superior to the DCT for predicting the risk of developing severe hyperbilirubinemia in term neonates.

Key Points

  • COHb levels do not predict the risk of developing severe hyperbilirubinemia in term neonates.

  • COHb levels may predict that ABO incompatibility in early life.

  • COHb levels did not prove to be superior to the direct coombs test.

Keywords

ABO incompatibility - carboxyhemoglobin - direct Coombs test - hyperbilirubinemia - neonate

Note

Ethical approval was granted by Ethical Committee at Bağcılar Training and Research Hospital (approval no. 2016/490).


Authors' Contributions

M.T. and S.H. provided substantial contributions to conception and design, acquisition of data, or analysis and interpretation of data and also helped in drafting the article and final approval of the version to be published. E.C. supported in revising the article critically for significant intellectual content and final approval of the version to be published.




Publikationsverlauf

Eingereicht: 24. September 2020

Angenommen: 20. November 2020

Artikel online veröffentlicht:
04. Januar 2021

© 2021. Thieme. All rights reserved.

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333 Seventh Avenue, 18th Floor, New York, NY 10001, USA

 

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