Filter, ascites treatment system and ascites treatment method

摘要

This filter for filtering ascitic fluids suppresses deterioration in filtering capacity of the filter while reducing clogging of a hollow fiber membrane by using an external pressure method. A filter 21 is provided with a cylindrical container 40 having a hollow fiber membrane bundle 42 therein, and allows an ascitic fluid to pass through the hollow fiber membranes 41 of the hollow fiber membrane bundle 42 from the outside of the hollow fiber membranes 41 to the inside thereof, to remove a specific substance in the ascitic fluid. The hollow fiber membranes 41 are arranged so as to be distributed such that the filling ratio of the hollow fiber membrane bundle 42 is 20-41%.