Filtrate concentration method for ascites or pleural effusion and filtrate concentration system

摘要

PROBLEM TO BE SOLVED: To achieve a desirable concentration rate by a simple control and device, as well as to reduce the load on medical treatment staff, when concentrating abdominal dropsy or pleural effusion filtrate.SOLUTION: Filtrate P is supplied to a closed external space A of a hollow fiber membrane 21 inside a membrane module 10. Moisture in the filtrate separated through the hollow fiber membrane 21 is dropped from an open inner space B of the hollow fiber membrane 21 to maintain a constant fluid volume of a concentrated liquid P concentrated in the external space A. The fluid volume of the concentrated liquid P in the external space A is adjusted to a prescribed fluid volume according to a concentration rate, by temporarily opening the external space A to let gas phase flow into or flow out of the external space A.