| 主权项 |
1. A method for filtering blood to produce plasma or serum, comprising the steps of:
(a) providing a blood filter comprising a filter membrane having opposite first and second sides, a receiving compartment defining a hollow space for receiving a blood sample to be filtered and having a first volume, wherein said first side is facing the receiving compartment, and a sampling compartment being arranged on said second side of said filter membrane, wherein at least 50% of the surface area of the second side of said filter membrane is covered; (b) inserting a blood sample and a gas into a syringe having a plunger, the blood sample occupying a second volume and the gas 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 by moving the plunger to a position such that the third volume is compressed by between 1/20 to 1/5, so that said blood sample is filtered by said filter membrane, wherein said plasma or serum comprised in said blood sample is forced through said filter membrane. |
