Late Vitamin K Deficiency-related Bleeding in Neonates (VKLB): Comparison of Different Strategies to Prophylaxis

Plain-language summary

The goal of this multicentric observational study was to compare four vitamin K dosing regimens in exclusively breastfed healthy term newborns. The main questions it aims to answer were: * comparing protein induced by vitamin K absence (PIVKA) levels in the different prophylaxis protocols at 48 hours, 1 month and 4 months * to investigate the compliance and safety of oral vitamin K 1 administration Participants received vitamin K prophilaxis according to birth Hospital regimen. A blood sample was taken at 48 hours, 1 month and 3 months of life. Plasmatic PIVKA-II concentretion was be dosed Researchers compared four groups of Vitamin K dosing regimens: 1. an intramuscolar injection of 1 mg vitamin K at birth 2. an intramuscolar injection of 1 mg vitamin K at birth followed by 50 μg/die orally from the second to the fourteenth week of life. 3. an intramuscolar injection of 1 mg vitamin K at birth followed by 150 μg/die orally from the second to the fourteenth week of life. 4. an oral dose of 2 mg vitamin K at birth, followed by a second dose at 4 weeks, and a third dose at 12 weeks to see if there is PIVKA-II plasmatic concentration differences.

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