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Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't
Early elective insulin therapy can reduce hyperglycemia and increase insulin-like growth factor-I levels in very low birth weight infants.
Journal of Pediatrics 2007 December
OBJECTIVE: To investigate the use of insulin throughout the first week of life in very low birth weight (VLBW) infants (birth weight <1.5 kg) to improve glucose control and increase insulin-like growth factor-I (IGF-I) levels. IGF-I is the dominant hormone involved in fetal growth, and low levels have been implicated in neonatal morbidities, such as retinopathy of prematurity.
STUDY DESIGN: In this pilot randomized controlled study (n = 16), the intervention group received insulin (0.025 U/kg/hr) on days 1 to 7, with 20% dextrose to maintain normoglycemia. Control infants received standard neonatal care. All infants received continuous glucose monitoring.
RESULTS: The intervention and standard care groups had similar mean gestational age (+/- standard deviation), 26.2 (+/- 2.5) vs 26.9 (+/- 2.7) weeks, and birth weight, 0.79 (+/- 0.26) vs 0.73 (+/- 0.16) kg. The standard care infants were hyperglycemic (sensor glucose >10 mmol/L [180 mg/dL]) for 35.9% of the study period, compared with 7.6% for the insulin-treated infants (P = .035). The duration of time with hypoglycemia (<2.6 mmol/L [47 mg/dL]) did not differ between the 2 groups (P = .746). The insulin-treated group had a 2.4-fold increase in mean IGF-I bioactivity (P = .005).
CONCLUSIONS: Early insulin therapy improves blood glucose control and increases IGF-I bioactivity levels. This could result in less morbidity associated with hyperglycemia and reduced IGF-I levels.
STUDY DESIGN: In this pilot randomized controlled study (n = 16), the intervention group received insulin (0.025 U/kg/hr) on days 1 to 7, with 20% dextrose to maintain normoglycemia. Control infants received standard neonatal care. All infants received continuous glucose monitoring.
RESULTS: The intervention and standard care groups had similar mean gestational age (+/- standard deviation), 26.2 (+/- 2.5) vs 26.9 (+/- 2.7) weeks, and birth weight, 0.79 (+/- 0.26) vs 0.73 (+/- 0.16) kg. The standard care infants were hyperglycemic (sensor glucose >10 mmol/L [180 mg/dL]) for 35.9% of the study period, compared with 7.6% for the insulin-treated infants (P = .035). The duration of time with hypoglycemia (<2.6 mmol/L [47 mg/dL]) did not differ between the 2 groups (P = .746). The insulin-treated group had a 2.4-fold increase in mean IGF-I bioactivity (P = .005).
CONCLUSIONS: Early insulin therapy improves blood glucose control and increases IGF-I bioactivity levels. This could result in less morbidity associated with hyperglycemia and reduced IGF-I levels.
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