Related Experiment Videos
Extreme hyperbilirubinaemia in Zimbabwean neonates: neurodevelopmental outcome at 4 months
1Department of Rehabilitation, Academic Medical Centre, University of Amsterdam, The Netherlands. MJBWolf@knoware.nl
Insights
Severely jaundiced infants with high total serum bilirubin (TSB) levels face significant neurodevelopmental risks. Over 25% showed abnormal or suspect outcomes at 4 months, with exchange transfusions linked to poorer results.
Area of Science:
- Neonatal Medicine
- Pediatric Neurology
- Public Health
Background:
- Severe neonatal jaundice, indicated by high total serum bilirubin (TSB), is a critical concern in infant health.
- Understanding the long-term neurodevelopmental impact of elevated TSB is crucial for timely intervention.
Purpose of the Study:
- To investigate the relationship between neonatal TSB levels and neurodevelopmental outcomes at 4 months corrected age in severely jaundiced infants.
- To identify risk factors associated with adverse neurodevelopmental outcomes in this population.
Main Methods:
- Prospective study of 50 Zimbabwean infants with TSB > 400 micromol/l.
- Neonatal neurological examination (NNE) and Infant Motor Screen (IMS) at 4 months corrected age.
- Analysis of TSB levels, exchange transfusion status, and neurodevelopmental scores.
Main Results:
- Mean TSB was 485 micromol/l; 7 infants received exchange transfusions.
- Infants receiving exchange transfusions had significantly higher mean TSB (637 micromol/l) compared to those without (459 micromol/l).
- At 4 months, 13.3% of infants scored abnormal and 13.3% suspect on the IMS; 50% of abnormal/suspect infants had received exchange transfusions.
Conclusions:
- Over 25% of infants with TSB > 400 micromol/l had abnormal or suspect neurodevelopmental outcomes at 4 months.
- Exchange transfusion was associated with a higher incidence of abnormal/suspect outcomes.
- Infants with TSB between 400-500 micromol/l who scored abnormal/suspect often had hemolytic disease or prematurity.
Unlabelled:
As part of a prospective study of severely jaundiced Zimbabwean infants, the relationship between maximum total serum bilirubin (TSB) concentration in the neonatal period and neurodevelopmental outcome at the corrected age of 4 months was studied. Fifty infants with a TSB of > 400 micromol/l (23.4 mg/dl) were enrolled and screened with a neonatal neurological examination (NNE). The cause of jaundice was low birth weight in 22 (44%), ABO incompatability in 8 (16%), sepsis in 8 (16%) and congenital syphilis (6%) in 3 infants. In 9 infants a cause could not be determined. At 4 months, 2 infants had died and 3 were lost to follow up, leaving 45 infants for the infant motor screen (IMS) at 4 months of age. Mean TSB in the neonatal period was 485 micromol/l (28.2 mg/dl), and 7 infants received an exchange transfusion. Mean TSB of the infants with an exchange transfusion was 637 micromol/l (37.2 mg/dl) (range 429-865 micromol/l (25-50.3 mg/dl)) and of the infants without transfusion 459 micromol/l (26.8 mg/dl) (range 400 740 micromol/l (23.4-43 mg/dl)) (P < 0.0001). The TSB was not associated with birth weight, gestational age, gender or head circumference of the baby. On the IMS, 6 of 45 (13.3%) infants scored abnormal, 6 (13.3%) suspect and 33 (73%) scored normal. Three of the six (50%) remaining infants who received an exchange transfusion scored abnormal on the IMS while only 3 of the 39 (8%) infants without exchange transfusion were abnormal.
Conclusion:
More than 25% of infants with a TSB of > 400 micromol/l (23.4 mg/dl) scored abnormal or suspect at 4 months of age and half of these infants already showed irreversible neurological symptoms. All infants who scored abnormal or suspect on the IMS with bilirubin levels between 400 and 500 micromol/l (23.4 and 29.2 mg/dl) had haemolytic disease or were premature.