Severe neonatal hyperbilirubinemia in infants aged 60 days or less (2025 to 2027)
Bibliographic record
Abstract
A 3-day-old male infant, born at 38 weeks’ gestation via spontaneous vaginal delivery, presents to the emergency department with poor feeding, lethargy and a high-pitched cry. He was discharged from the hospital at 12 h of life without a documented bilirubin level but with a plan for follow-up. He is exclusively breastfed, has bruising on the scalp from a vacuum-assisted delivery, and is of East Asian descent. Upon examination, the infant is jaundiced, hypotonic and intermittently arching his back. A stat serum total bilirubin is 460 µmol/L. The conjugated bilirubin is 12 µmol/L. Additional laboratory results reveal mother’s blood type (O+) and her Direct Antiglobulin Test was positive. The infant is transferred to the neonatal intensive care unit for urgent double-volume exchange transfusion. The patient is placed under phototherapy while preparations are made for exchange transfusion. Upon review, predischarge bilirubin screening was not performed, and follow-up was scheduled for day 5 of life. Antibody screen on cord blood was not performed. Additional risk factors included early discharge, jaundice in the first 24 h, exclusive breastfeeding and a cephalohematoma. This case meets the Canadian Paediatric Surveillance Program (CPSP) case definition for severe neonatal hyperbilirubinemia. It illustrates the need for systematic bilirubin screening, early recognition of risk factors and timely follow-up—issues the 2025 revised Canadian Paediatric Society (CPS) guidelines aim to address.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".