Patent ID: 9630374
Date: 2017-04-25
CPC Classifications: B01J,B01L,B32B,G01N,Y10T

Claim:
1. A carrier for dried blood spot applications comprising a substantially laminar manufacture having a front surface adapted for receiving blood during use comprising at least two substantially laminar layers in contact, wherein the layers each comprise meshes of woven, hydrophilic material, and wherein at least two of the layers are rotated relative to each other by an angle v nm of 7° to 83°, wherein n and m indicate relative layer positions, and wherein upon blood spotting the meshes of at least two layers are filled with blood forming a blood spot with a substantially fixed volume of blood per carrier area, and wherein an area difference, ΔA, between a first dried blood spot and a second dried blood spot is less than 20%, where the area of the first dried blood spot is the area of a 30 μl 80% hematocrit blood sample on the surface after drying 2 hours at 20° C. in air and the area of the second dried blood spot is the area of a 30 μl 20% hematocrit blood sample on the surface after drying 2 hours at 20° C. in air.