Blar i NTNU Open på forfatter "Kristoffersen, Ann-Helen"

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    • Impact of different preanalytical conditions on results of lupus anticoagulant tests 

      Kristoffersen, Ann-Helen; Jansrud, Ida; Vannes, Solveig; Åsberg, Arne; Aakre, Kristin Moberg (Peer reviewed; Journal article, 2019)
      Introduction: The currently recommended preanalytical conditions for lupus anticoagulant (LA) analysis require analyzing samples in fresh or freshly frozen platelet‐poor plasma. The aim of this study was to evaluate whether ...

    • Serum or Plasma for Quantification of Direct Oral Anticoagulants? 

      Aakerøy, Rachel; Stokes, Charlotte Lorentze; Tomic, Marija; Hegstad, Solfrid; Kristoffersen, Ann-Helen; Ellekjær, Hanne; Schjøtt, Jan Didrik; Spigset, Olav; Helland, Arne (Peer reviewed; Journal article, 2022)
      Background: Direct oral anticoagulants are increasingly replacing vitamin K antagonists for prevention of stroke in patients with atrial fibrillation, partly owing to the lack of a need for routine monitoring. Therapeutic ...