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    • 4. 发明申请
    • MULTIPLE LAYER, FORMED-IN-PLACE IMMUNOISOLATION MEMBRANE STRUCTURES FOR IMPLANTATION OF CELLS IN HOST TISSUE
    • 多层,形成的免疫组织膜结构,用于植入宿主细胞中的细胞
    • WO1996036296A1
    • 1996-11-21
    • PCT/US1996006826
    • 1996-05-13
    • BAXTER INTERNATIONAL INC.
    • BAXTER INTERNATIONAL INC.PAULEY, Robin, G.McLARTY, Donna, L.KHARE, Atul, R.STERNBERG, ShmuelBOGGS, Daniel, R.NEUENFELDT, StevenJONES, MarkBRAUKER, James, H.MARTINSON, Laura, A.
    • A61F02/02
    • A61K9/0024A61F2/022A61L27/38
    • A permeable structure (16) forms a chamber (12) to hold living cells (14). The structure includes a first permeable region (18) surrounding at least a portion of the chamber (12) having a confirmation that, when implanted is host tissue, substantially blocks penetration of host cells into the chamber (12) while permitting solute transport. The structure (16) also includes a second permeable region (20) overlaying the first permeable region (18) having a confirmation that, when implanted in host tissue, forms a permeable interface with host tissue that permits solute transport. A third permeable region (22) is located between the first (18) and second (20) permeable regions. The third region (22) comprises a solution of polymer material formed in place between the first (18) and second (20) permeable regions. The third permeable region (22) bonds the first (18) and second (20) permeable regions together. The third permeable region (22) also has a confirmation that, when implanted in host tissue, permits solute transport between the first (18) and second (20) permeable regions together, providing a robust, laminated structure that resists delamination during implantation caused by cellular infiltration into discontinuous spaces between the first (18) and second (20) regions. The third, formed-in-place region (22) can also have a confirmation providing an immunoisolation effect. Furthermore, the permeability of the third, formed-in-place membrane (22) is sufficient high that it does not adversely effect the permability value desired for the overall multiple layer structure (16).
    • 可渗透结构(16)形成容纳活细胞(14)的腔室(12)。 该结构包括围绕腔室(12)的至少一部分的第一可渗透区域(18),其确认当植入的是宿主组织时,基本上阻止宿主细胞渗入腔室(12),同时允许溶质运输。 结构(16)还包括覆盖第一可渗透区域(18)的第二可渗透区域(20),其确认当植入宿主组织时,与允许溶质运输的宿主组织形成可渗透界面。 第三可渗透区域(22)位于第一(18)和第二(20)可渗透区域之间。 第三区域(22)包括在第一(18)和第二(20)可渗透区域之间形成的聚合物材料溶液。 第三可渗透区域(22)将第一(18)和第二(20)可渗透区域结合在一起。 第三渗透区域(22)还确认,当植入到宿主组织中时,允许第一(18)和第二(20)可渗透区域之间的溶质传输在一起,提供坚固的层压结构,其抵抗植入期间的分层,由 细胞浸润到第一(18)和第二(20)区域之间的不连续空间。 第三个就地区域(22)也可以具有提供免疫隔离效果的确认。 此外,第三就地形成膜(22)的渗透性足够高,使得其不会对整个多层结构(16)所期望的渗透性值产生不利影响。
    • 5. 发明申请
    • RECTIFYING DIALYZER, BIOREACTOR AND MEMBRANE
    • 修复DIALYZER,生物反应器和膜
    • WO1994020603A1
    • 1994-09-15
    • PCT/US1994002126
    • 1994-02-28
    • BAXTER INTERNATIONAL INC.
    • BAXTER INTERNATIONAL INC.OFSTHUN, Norma, J.HENDERSON, Lee, W.BROWN, Richard, I.PAULEY, Robin, G.
    • C12M03/06
    • B01D61/243B01D61/14B01D69/02B01D69/08C12M29/16
    • The invention provides dual-skinned membrane useful as one way or rectifying membranes which reduce back filtration of solute molecules in dialysis and which improve nutrient supply and product recovery in membrane bioreactors. The membranes are dual-skinned polymeric materials preferably in the form of hollow fibers. The membranes have skins of polymer on the opposite sides with differing permeability to solutes and sieving coefficient characteristics. The skin on each side have pores that are invisible at 10,000 times magnification, the microporous structure between said skins contains pores capable of retaining solutes in a molecular weight range of about 5000 to 200,000 in an increased concentration between the interior and the exterior skins. Improved dialysis devices are formed by using bundles of the hollow fiber membranes as a dialysis means having rectifying properties.
    • 本发明提供双皮肤膜,其可用作单向或整流膜,其减少透析中溶质分子的反过滤,并改善膜生物反应器中的营养供应和产物回收。 膜是双面聚合材料,优选为中空纤维的形式。 膜在相对侧具有聚合物的表面,对溶质和筛分系数特性具有不同的渗透性。 每侧的皮肤具有在10,000倍放大率下不可见的孔,所述表皮之间的微孔结构包含能够在内部和外部皮肤之间以更高浓度保持在约5000至200,000的分子量范围内的溶质的孔。 通过使用中空纤维膜束作为具有整流性质的透析装置形成改进的透析装置。