title: Effect of vitamin K administration on acarboxy prothrombin (PIVKA-II) levels in newborns.
abstract: PIVKA-II (protein induced by vitamin K absence or antagonist-II) was measured in two groups of newborns, one group being given 5 mg vitamin K at birth and the other untreated. The untreated group had a significantly higher proportion of PIVKA-II positive babies at 3 and 5 days of age than did the treated group. When vitamin K was administered to newborn babies whose normotest levels were less than 30%, it was found that the higher the pre-treatment PIVKA-II levels the greater the response to vitamin K, as monitored by the normotest. Thus PIVKA-II levels might be more useful than a coagulation test, since the low activity of vitamin K dependent coagulation factors sometimes reflects not vitamin K deficiency but impaired production of these factors because of immaturity. The findings support the view that vitamin K given prophylactically at birth will help to prevent neonatal bleeding.
authors.forename: K
authors.initials: K
authors.lastname: Motohara
authors.forename: F
authors.initials: F
authors.lastname: Endo
authors.forename: I
authors.initials: I
authors.lastname: Matsuda
mesh_terms: D000284:Administration, Oral; D015415:Biomarkers; D004797:Enzyme-Linked Immunosorbent Assay; D005312:Fetal Blood / Q000032:analysis; D006801:Humans; D007020:Hypoprothrombinemias; D007231:Infant, Newborn; D011498:Protein Precursors / Q000097:blood / Q000172:deficiency*; D011516:Prothrombin / Q000097:blood; D011897:Random Allocation; D014812:Vitamin K / Q000097:blood / Q000627:therapeutic use*
chemical_list: D015415:Biomarkers; D011498:Protein Precursors; D014812:Vitamin K; C008208:acarboxyprothrombin; D011516:Prothrombin