title: Vitamin K concentrations in the plasma and liver of surgical patients.
abstract: Vitamin K deficiency has been reported in patients who were treated with antibiotics and placed on poor diets after surgery. High-performance liquid chromatography (HPLC) was used to study the influence of dietary intake on vitamin K concentrations in surgical patients (n = 22). Plasma phylloquinone decreased rapidly from 1.19 +/- 0.16 to 0.47 +/- 0.12 nmol/L (means +/- SEM, n = 11) on a low-phylloquinone diet and from 1.16 +/- 0.12 to 0.36 +/- 0.07 nmol/L (n = 11) by postoperative fasting. A small amount of phylloquinone and a large amount of menaquinone were found in liver tissue. Phylloquinone concentration was 28.0 +/- 4.3 pmol/g liver (wet weight) on the standard diet (n = 7) whereas it was 6.8 +/- 1.1 pmol/g on the low-phylloquinone diet after 3 d (n = 8). Because phylloquinone is rapidly depleted by fasting, it may be difficult to prevent vitamin K deficiency by dietary phylloquinone alone during long-term fasting after surgery.
authors.affiliation: Second Department of Surgery, Faculty of Medicine, Kyoto University, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Usui
authors.forename: H
authors.initials: H
authors.lastname: Tanimura
authors.forename: N
authors.initials: N
authors.lastname: Nishimura
authors.forename: N
authors.initials: N
authors.lastname: Kobayashi
authors.forename: T
authors.initials: T
authors.lastname: Okanoue
authors.forename: K
authors.initials: K
authors.lastname: Ozawa
mesh_terms: D000328:Adult; D000368:Aged; D002851:Chromatography, High Pressure Liquid; D005215:Fasting / Q000009:adverse effects*; D005260:Female; D006801:Humans; D007432:Intraoperative Period; D008099:Liver / Q000032:analysis*; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period; D011300:Preoperative Care; D014812:Vitamin K / Q000008:administration & dosage / Q000032:analysis*; D014813:Vitamin K Deficiency / Q000097:blood / Q000209:etiology*
chemical_list: D014812:Vitamin K