Asahi Kasei Medical Co., Ltd.

Yoshimasa Matsuura

Tomohisa Yokomizo

Shin-ichiroh Oka

Tatsuya Fukuda

Shin-Ichiroh Oka

Seiichirou Tomoura

A blood processing filter for removing undesirable components from liquid containing a blood component or blood, comprises a sheet-shaped filter element, and a container that includes an inlet-side container element and an outlet-side container element that are disposed to clamp the filter element, and has an internal space separated by the filter element into an inlet space and an outlet space. The filter element includes a pair of filtering surfaces disposed on the inlet space side and the outlet space side, and an end surface along a periphery of the pair of the filtering surfaces, and the inlet-side container element and the outlet-side container element are provided with a gripper that clamps and compresses outer edge portions of the pair of filtering surfaces, and adheres to the end surface with melt resin, and a part of the container is provided with a steam-permeable portion having steam permeability.

Blood treatment filter and blood treatment filter manufacturing method

A blood processing filter for removing undesirable components from liquid containing a blood component or blood, comprises: a sheet-shaped filter element; and a container that includes an inlet-side container element and an outlet-side container element that are disposed to clamp the filter element, and has an internal space separated by the filter element into an inlet space and an outlet space, wherein the filter element includes a filtering surface on a side of the inlet space, a filtering surface on a side of the outlet space, and an end surface along peripheries of the pair of filtering surfaces, and the inlet-side container element and the outlet-side container element are provided with a gripper, and the gripper clamps and compresses an outer edge portion of the pair of filtering surfaces, and is caused to adhere to the end surface with melt resin.

Blood processing filter and blood processing filter manufacturing method

A blood processing filter for removing undesirable components from liquid containing a blood component or blood, comprises: a sheet-shaped filter element; and a hard container that includes an inlet-side container element and an outlet-side container element that are disposed to clamp the filter element, and has an internal space separated by the filter element into an inlet space and an outlet space, wherein the filter element includes a filtering surface on a side of the inlet space, a filtering surface on a side of the outlet space, and an end surface along peripheries of the pair of filtering surfaces, the inlet-side container element and the outlet-side container element are provided with a gripper that clamps and compresses an outer edge portion of the pair of filtering surfaces, and a thickness of the filter element is compressed at the gripper to be 0.05 to 0.5 times the thickness.

An aggregate-removing filter material efficiently removes aggregates that are contained in a blood product for transfusion and may cause transfusion reactions without clogging, and exhibits excellent quality stability, and a blood product filtration method uses a filter apparatus that includes the aggregate-removing filter material and a leukocyte-removing filter material. The aggregate-removing filter material includes short fibers having a fineness of 0.7 to 4.0 dtex and a fiber length of 1 to 80 mm, and a ground fabric that includes long fibers, a fiber axis of the long fibers being oriented in a planar direction of the ground fabric, the short fibers being entangled with the ground fabric so that the aggregate-removing filter material has a total weight per unit area of 10 to 80 g/m, and a layer of the short fibers forming a three-dimensional structure.

Filter material for removing aggregates and method of filtering blood product

A flexible blood filter allowing smooth flow of a liquid and being excellent in separation resistance, pressure resistance and centrifugation resistance. The blood processing filter, comprising a first filter element for removing aggregates from blood, a second filter element for removing leukocytes provided in the downstream of the first filter element, and the third filter element having gas permeability of 3 to 40 cc/cm/sec per thickness of 1 cm provided between the second filter element and the outlet port side container.

Blood processing filter

A flexible blood filter allowing smooth flow of a liquid and being excellent in separation resistance, pressure resistance and centrifugation resistance. The blood processing filter, includes a first filter element for removing aggregates from blood, a second filter element for removing leukocytes provided in the downstream of the first filter element, and a third filter element having gas permeability of 3 to 40 cc/cm2/sec per thickness of 1 cm provided between the second filter element and the outlet port. The filter contains a seal zone at a peripheral section which contains five layers including a layer of molten material and layers of molten material mixed with filter element material.

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Tokyo, Japan

Yoshimasa Matsuura