[Coagulation screening tests of low-weight newborn infants--deviations and dynamics].

A prospective study was performed in 1993 in our hospital, including newborns with low birth weight and a control group of term infants. It aims to give information about their coagulation status and its dynamics. Abnormalities in the carried out screening tests were noticed in both groups during the first day of life. After the performed vit. K prophylaxis PT had almost the same dynamics in the two groups and almost reached the normal values in adults. aPTT remains highly prolonged in the group of low birth weight infants. Comparing the haemostasiological test levels between the group of low birth weight newborns, having received a prophylactic dose of vit. K i.m. and the corresponding group without vit. K prophylaxis, we established the faster normalizing of these levels in the first group.