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- Title
Adult and child automated immature granulocyte norms are inappropriate for evaluating early-onset sepsis in newborns.
- Authors
Wiland, Emily L.; Sandhaus, Linda M.; Georgievskaya, Zhanna; Hoyen, Claudia M.; O'Riordan, Mary Ann; Nock, Mary L.
- Abstract
Aim Automated haematology analysers are increasingly being used. Normal ranges for automated immature granulocyte counts ( IG%) are described in adults and children as <1%, but are not reported for newborns, who often have complete blood count with differential in evaluation for early-onset sepsis. Therefore, this study aimed to describe IG% during the first 48 hours of life (HOL) in newborns and determine the clinical factors affecting IG%. Methods We carried out retrospective chart reviews for newborns ≥35 weeks gestational age with one or more complete blood count with differential in the first 48 HOL. Clinical history and automated haematology results were reviewed. Results Forty-seven of 215 subjects had two or more complete blood counts within 48 h. In the first 48 HOL, IG% ranged from 0 to 8.4% (95th percentile 5.2%). At <12 h, 70% of samples had IG% >1%. IG% appears to decrease over time. Earlier hour of life and higher birth weight were independently associated with higher IG%. Conclusion Immature granulocyte counts in newborns appeared to be higher than reported for other age groups. Use of adult and child norms for IG% would not be appropriate for newborns being evaluated for early-onset sepsis.
- Subjects
HEMATOLOGY; GRANULOCYTES; NEWBORN infants; SEPSIS; EOSINOPHILS; GRANULOCYTE antigens
- Publication
Acta Paediatrica, 2014, Vol 103, Issue 5, p494
- ISSN
0803-5253
- Publication type
Article
- DOI
10.1111/apa.12563