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Title:
SEPARATION MEMBRANE FOR BLOOD TREATMENT AND BLOOD TREATMENT DEVICE PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2015/093160
Kind Code:
A1
Abstract:
Disclosed is a separation membrane for blood treatment that comprises a blood inlet side end part, a blood outlet side end part, and a separating function surface that is brought into contact with the blood to be treated. When distilled water is infiltrated into the separation membrane in a dry state until the water content attains the saturation level and then water present on the separating function surface is divided into unfreezable water, intermediate water and free water, the abundance ratio of the intermediate water is 20% or more relative to the sum of the unfreezable water, intermediate water and free water. The water content of the separation membrane is 10 mass% or less relative to the entire mass of the separation membrane. The separation membrane comprises a separation membrane base material and inorganic salt grains with a grain size of 3 μm or less, said inorganic salt grains adhering to the surface of the separation membrane base material and the amount of said inorganic salt grains being 100 μg to 0.1 g inclusive. When the separation membrane is equally divided into five areas between the blood inlet side end part and the blood outlet side end part, the central 1/5 area contains the smallest amount of the inorganic salt grains among the five 1/5 areas thus obtained.

Inventors:
KOIZUMI TOSHINORI (JP)
HATTORI MAKIKO (JP)
ICHI TAKAHIRO (JP)
NISHIZAWA KAZUKI (JP)
Application Number:
PCT/JP2014/079058
Publication Date:
June 25, 2015
Filing Date:
October 31, 2014
Export Citation:
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Assignee:
ASAHI KASEI MEDICAL CO LTD (JP)
International Classes:
A61M1/18; A61L2/08; B01D69/00; B01D71/38; B01D71/40; B01D71/44; B01D71/68
Foreign References:
JP2012105579A2012-06-07
JPH08299433A1996-11-19
JP2004161954A2004-06-10
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
Yoshiki Hasegawa (JP)
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