Blood filter and method for filtering blood

Abstract

The present invention relates to a method for filtering blood to produce plasma or serum, comprising the steps of: a. providing a blood filter comprising a filter membrane (6) having opposite first and second sides and a receiving compartment (2) defining a hollow space; and b. inserting a blood sample (1) into said receiving compartment (2), wherein the volume of said hollow space is 3 to 20 times larger than the volume of said blood sample (1), thereby increasing the gas pressure within said receiving compartment so that said blood sample is filtered by said filter membrane (6), and wherein said plasma or serum comprised in said blood sample is forced through said filter membrane. The invention also relates to a method for filtering blood to produce plasma or serum, comprising the steps of: a. providing a blood filter comprising a filter membrane (6) having opposite first and second sides and a receiving compartment (2'') having a first volume; b. inserting a blood sample (1) and a gas (2') into a syringe, the blood sample (1) occupying a second volume and the gas (2') occupying a third volume in the syringe; c. connecting said syringe to said blood filter to be in fluid communication with each other; and d. increasing the pressure within said syringe until the blood sample (1) is received by said receiving compartment (2''), so that said blood sample (1) is filtered by said filter membrane (6), wherein said plasma or serum comprised in said blood sample is forced through said filter membrane (6); wherein the sum of first and third volume is 3 to 20 times larger than the second volume. The present invention also relates to a filter membrane (6) having opposite first and second sides; a receiving compartment (2) defining a hollow space for receiving a blood sample to be filtered, said receiving compartment having at least one opening covered with said filter membrane (6), wherein said first side is facing the receiving compartment (2), and wherein the hollow space of said receiving compartment has a volume being 3 to 20 times larger than the volume of the blood sample to be filtered; and a sampling compartment (10) being arranged on said second side of said filter membrane (6).

Description

technical field [0001] The present invention relates to a method for filtering blood to produce plasma or serum and to a blood filter for producing plasma or serum from a blood sample. The invention also relates to a kit comprising a syringe and a blood filter for producing plasma or serum from a blood sample. Background technique [0002] In this specification, reference is made to various documents including patent applications and manufacturer's manuals. The contents of these documents, although not considered relevant to the patentability of this invention, are hereby incorporated by reference in their entireties. More specifically, all cited documents are incorporated by reference to the same extent as if each individual document was specifically and individually indicated to be incorporated by reference. [0003] Filtration of blood to separate solid blood components from serum or plasma is an essential step that can be used to determine the presence and / or concentra...

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