Patent ID: 7597806
Filing Date: 2009-10-06
Classification: A61M

Abstract:
1. A cylindrical body fluid-treating filter device comprising a cylindrical housing which has two body fluid flow ports and a body fluid-treating cylindrical filter layer housed in the cylindrical housing, the cylindrical filter layer being disposed so as to divide the inner space of the housing into two hollow sections by liquid-tightly sealing the both ends and securing at least one end thereof to the inner wall of the housing, one of the hollow sections of the housing divided by the cylindrical filter layer communicating with the first body fluid flow port, and the other hollow section in the housing divided by the cylindrical filter layer communicating with the second body fluid flow port, wherein a rod-shaped flow passage resistant member extends through the hollow section along the center axis formed by the cylindrical filter layer, and a spacer layer for allowing a body fluid to flow with a thickness of not less than 0.7 mm, but not more than 3.5 mm, is provided between the outer circumference of the cylindrical filter layer and the housing, and between the inner peripheral surface of the cylindrical filter layer and the flow passage resistant member.