Title:
BLOOD TREATMENT FILTER
Document Type and Number:
WIPO Patent Application WO/2021/006331
Kind Code:
A1
Abstract:
The present invention addresses the problem of providing a blood treatment filter that is excellent in all of leukocyte removal performance, filtration time (filtration speed) and blood recovery. This problem can be solved by the blood treatment filter mentioned below. The blood treatment filter comprises a flexible container having an inlet port of blood and an outlet port of blood, a filter medium disposed between the inlet port and the outlet port in the flexible container, and a flow path-securing member disposed between the filter medium and the outlet port in the flexible container, wherein: the filter medium comprises a filter layer X1 containing a filter-forming unit A1 and a filter layer Y containing a filter-forming unit B; the filter layer X1 is disposed between the filter layer Y and the flow path-securing member; the aeration resistance per thickness of the filter-forming unit A1 is 5.0 Pa•s/m2 or more and less than 9.0 Pa•s/m2; the aeration resistance per thickness of the filter-forming unit B is 9.0 Pa•s/m2 or more; the aeration resistance of the filter layer X1 is 4.0 kPa•s/m or more and not more than 20.0•kPa s/m; and the aeration resistance of the filter medium is 55.0 kPa•s/m or more and less than 75.0 kPa•s/m.
Inventors:
KAZUHIKO NAKAMURA (JP)
TOMOHISA YOKOMIZO (JP)
TOMOHISA YOKOMIZO (JP)
Application Number:
PCT/JP2020/026962
Publication Date:
January 14, 2021
Filing Date:
July 10, 2020
Export Citation:
Assignee:
ASAHI KASEI MEDICAL CO LTD (JP)
International Classes:
B01D39/16; A61M1/02
Domestic Patent References:
| WO2012039400A1 | 2012-03-29 | |||
| WO2002004045A1 | 2002-01-17 | |||
| WO2016204289A1 | 2016-12-22 | |||
| WO2014196651A1 | 2014-12-11 | |||
| WO2015050216A1 | 2015-04-09 | |||
| WO1995017236A1 | 1995-06-29 |
Foreign References:
| JP2017508553A | 2017-03-30 | |||
| JPS5524340B2 | 1980-06-28 | |||
| JP4172631B2 | 2008-10-29 | |||
| EP0526678A1 | 1993-02-10 | |||
| JPH11216179A | 1999-08-10 |
Other References:
KAWABATA, SUEO: "Development of An Automatic Air-permeability Tester", JOURNAL OF THE TEXTILE MACHINERY SOCIETY OF JAPAN, vol. 40, no. 6, 1987, pages 41 - 49, XP055783298, DOI: 10.4188/transjtmsj.40.6_T59
"Fushokufu no Kiso to Oyo", 25 August 1993, JAPAN TEXTILE MACHINERY ASSOCIATION, pages: 119 - 127
See also references of EP 3998115A4
"Fushokufu no Kiso to Oyo", 25 August 1993, JAPAN TEXTILE MACHINERY ASSOCIATION, pages: 119 - 127
See also references of EP 3998115A4
Attorney, Agent or Firm:
INABA, Yoshiyuki et al. (JP)
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