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Risk factors of cholestasis in very low-birth-weight infants
1Department of Pediatrics, Provincial Tao-Yuan General Hospital, Taipei, Taiwan, R.O.C.
Insights
Cholestasis affects over 20% of very low-birth-weight infants, often linked to prematurity and prolonged fasting. While typically resolving, severe cases can be fatal, highlighting the need for further research into long-term outcomes.
Area of Science:
- Neonatal Medicine
- Pediatric Gastroenterology
- Hepatology
Background:
- Cholestasis is a significant concern in neonatal intensive care units.
- Very low-birth-weight infants are particularly vulnerable due to immature physiological systems.
- Understanding risk factors and clinical course is crucial for management.
Purpose of the Study:
- To determine the incidence of cholestasis in very low-birth-weight infants.
- To describe the clinical course and duration of cholestasis.
- To identify perinatal risk factors associated with cholestasis development and severity.
Main Methods:
- Retrospective study of 143 very low-birth-weight infants.
- Cholestasis defined as direct-reacting bilirubin > 2 mg/dL for > 14 days.
- Analysis of perinatal risk factors for association with cholestasis.
Main Results:
- Cholestasis occurred in 31 infants (21.7%).
- Mean onset at 30.3 days, mean duration 77.1 days.
- Lower birth weight and longer fasting correlated with development; sepsis worsened severity.
Conclusions:
- Cholestasis is a common complication in extremely premature infants.
- While the clinical course often appears benign, long-term sequelae remain unknown.
- Immature liver function, lack of gut stimulation, and sepsis contribute to cholestasis.
Abstract:
To evaluate the incidence, clinical course, and possible risk factors of cholestasis in very low-birth-weight infants. A retrospective study of 143 very low-birth-weight infants was performed. Cholestasis was defined as direct-reacting bilirubin > 2 mg/dL for more than 14 days. The clinical course of cholestasis was described, and perinatal risk factors were evaluated for associations with the development and severity of cholestasis. Cholestasis was present in 31 infants (21.7%). The mean (SD) age of onset was 30.3(15.3) days after birth or 26.0 (15.6) days after receiving parenteral nutrition, and the mean (SD) duration was 77.1 (33.8) days. In half of the cholestatic infants, bilirubin continued to rise after discontinuing parenteral nutrition. One infant developed signs of liver cirrhosis and died, two infants died with progressive cholestasis, while the other 28 patients recovered. Analysis of risk factors revealed that birthweight and duration of fasting significantly correlated with the development of cholestasis, and that sepsis significantly influenced the severity of cholestasis. Cholestasis is a common complication of extreme prematurity. The clinical course seems benign but long-term sequelae are unknown. Immature liver function and absence of stimuli for intestinal motility and hormonal secretion predispose to decreased bile flow, while sepsis further impairs hepatic ductular secretion and aggravates cholestasis.