会员体验
专利管家(专利管理)
工作空间(专利管理)
风险监控(情报监控)
数据分析(专利分析)
侵权分析(诉讼无效)
联系我们
交流群
官方交流:
QQ群: 891211   
微信请扫码    >>>
现在联系顾问~
热词
    • 1. 发明授权
    • Plasminogen activator covalently bonded to a porous body of
.beta.-tricalcium phosphate
    • 共价键合到β-磷酸三钙的多孔体上的纤溶酶原激活物
    • US5491082A
    • 1996-02-13
    • US246940
    • 1994-05-20
    • Takahiro SuzukiSukezo KawamuraMotohiro ToriyamaYoshiyuki YokokawaYukari KawamotoYasuharu HakamatsukaHiroyuki Irie
    • Takahiro SuzukiSukezo KawamuraMotohiro ToriyamaYoshiyuki YokokawaYukari KawamotoYasuharu HakamatsukaHiroyuki Irie
    • A61K38/00C12N9/72C12N11/14A61K38/48
    • C12N9/6456C12N11/14A61K38/00
    • A plasminogen activator such as urokinase or tissue plasminogen activator is covalently bonded to a porous body composed of calcium phosphate to form a plasminogen activator-porous body complex. The tricalcium phosphate can be .alpha.-tricalcium phosphate, .beta.-tricalcium phosphate, hydroxyapatite, tetracalcium phosphate, octacalcium phosphate and mixtures thereof. In a preferred embodiment, .beta.-tricalcium phosphate which has excellent biocompatibility with the body or a mixture of .beta.-tricalcium phosphate and hydroxyapatite is used. Preferably, synthetic calcium phosphate is used is to avoid impurities contained by natural calcium phosphate. Covalent bonding is by crosslinking with glutaraldehyde, bismaleimides, dihalogenic aryls or diisocyanates, or by using cyanogen bromide, diazotization or periodic acid. The complex can be filled into a column to form a bioreactor. A granular complex can be intravascularly injected into the blood of a patient to provide thrombotic activity for a long period of time. In another embodiment, a complex of a predetermined shape can be implanted to provide thrombotic activity.
    • 纤维蛋白溶酶原激活剂如尿激酶或组织纤溶酶原激活剂共价键合到由磷酸钙组成的多孔体上以形成纤溶酶原激活剂多孔体复合体。 磷酸三钙可以是α-磷酸三钙,β-磷酸三钙,羟基磷灰石,磷酸四钙,磷酸八钙及其混合物。 在优选的实施方案中,使用与身体具有优异生物相容性的β-磷酸三钙或磷酸β-磷酸钙和羟基磷灰石的混合物。 优选地,合成磷酸钙是为了避免天然磷酸钙含有的杂质。 共价键是通过与戊二醛,双马来酰亚胺,二卤代芳基或二异氰酸酯交联,或通过使用溴化氰,重氮化或高碘酸进行交联。 复合物可以填充到柱中以形成生物反应器。 颗粒状复合物可以血管内注射到患者的血液中以长时间提供血栓形成活性。 在另一个实施方案中,可以植入预定形状的复合物以提供血栓形成活性。
    • 2. 发明授权
    • Method of preparing calcium phosphate
    • 磷酸钙的制备方法
    • US5322675A
    • 1994-06-21
    • US4777
    • 1993-01-14
    • Yasuharu HakamatsukaHiroyuki IrieSukezo KawamuraMotohiro Toriyama
    • Yasuharu HakamatsukaHiroyuki IrieSukezo KawamuraMotohiro Toriyama
    • C01B25/32C04B35/447
    • C04B35/447C01B25/327
    • Powdery calcium carbonate and a powdery dihydrate of calcium monohydrogenohosphate are weighed to get a Ca/P ratio of 1.45 to 1.67. The powdery mixture thus prepared is then added pure water at a temperature of 30.degree. C. or higher to obtain an aqueous slurry having a concentration of about 10% by weight. Thereafter, the aqueous slurry is subjected to a rotational attrition by using a ball mill to conduct a mechanochemical reaction of the calcium carbonate with the dihydrate of calcium monohydrogenphosphate. The slurry is then dried completely at 80.degree. C., followed by pulverization to yield a dry powder of calcium phosphate hydrate. The dry powder is calcinated at a temperature ranging from 720.degree. to 1,150.degree. C. for 1-10 hours or more to give calcium phosphate powder, which is molded in a desired shape and is sintered at a certain temperature to obtain a sintered body of calcium phosphate. The calcium phosphate and the sintered body thereof, thus prepared, have an assured biological safety in that the calcium phosphate is free from hemolysis, antigenicity and cytotoxicity.
    • 称量粉状碳酸钙和一水合磷酸二氢钙粉末,得到1.45〜1.67的Ca / P比。 然后将如此制备的粉末混合物在30℃或更高的温度下加入纯水,得到浓度为约10重量%的含水浆料。 然后,使用球磨机对含水浆料进行旋转磨耗,进行碳酸钙与磷酸一氢钙的二水合物的机械化学反应。 然后将浆液在80℃下完全干燥,随后粉碎,得到磷酸钙水合物的干燥粉末。 将干燥粉末在720〜1150℃的温度下煅烧1-10小时以上,得到磷酸钙粉末,其以所需形状成型并在一定温度下烧结,得到烧结体 磷酸钙 由此制备的磷酸钙及其烧结体具有确保的生物安全性,因为磷酸钙不含溶血,抗原性和细胞毒性。
    • 8. 发明授权
    • Hollow porous ceramic carrier for embedding in patient for sustained medicament release and method of preparation thereof
    • 中空多孔陶瓷载体,用于包埋在患者中用于持续的药物释放及其制备方法
    • US06350462B1
    • 2002-02-26
    • US08044549
    • 1993-04-07
    • Yasuharu HakamatsukaHiroyuki IrieGen Horie
    • Yasuharu HakamatsukaHiroyuki IrieGen Horie
    • A61K952
    • A61K9/0024A61K9/2009
    • An improved porous ceramic body to be embedded in a patient for sustained release of a medicament, and a method of making the ceramic body is provided. To control the release of the medicament, the pores of the ceramic body decrease in diameter from the inner surface to the outer surface of the body whereby the pore diameter is substantially proportional to the distance from the outer surface of the carrier. First, raw ceramic slurry is made from the blend of &bgr;-TCP, deflocculating agent, and water. Next, using a syringe the ceramic slurry is supplied to the internal region of a solvent-absorbable mold from an aperture along the inner wall surface. Then, the ceramic slurry is quickly dehydrated before thinly adhering itself onto the inner wall surface of the mold. Therefore, a preformed body having a hollow is obtained. Next, after fully being dried, the dried preformed body is fired at 1,050° C. for an hour before eventually yielding a spherical carrier for use in sustained release preparation. Substantially, the carrier is composed of a porous ceramic body which having the hollow for retaining the medicament and permits permeation of the medicament. The pore diameter corresponding to the peak value of the distribution thereof decreases toward to the outer periphery of the preformed body and yet, width of the distribution of the pore diameter becomes narrower.
    • 一种改进的多孔陶瓷体,其被埋设在患者体内,用于药物的持续释放,并且提供了制造该陶瓷体的方法。 为了控制药物的释放,陶瓷体的孔直径从主体的内表面到外表面减小,因此孔径基本上与离开载体的外表面的距离成比例。首先,生陶瓷 浆料由β-TCP,抗絮凝剂和水的混合物制成。 接下来,使用注射器,陶瓷浆料从沿着内壁表面的孔口供应到吸收溶剂的模具的内部区域。 然后,在将其自身轻轻地粘附到模具的内壁表面之前,陶瓷浆料快速脱水。 因此,获得具有中空部的预制体。 接下来,完全干燥后,将干燥的预成型体在1050℃下烧制1小时,最后得到用于缓释制剂的球形载体。 基本上,载体由具有用于保持药物的中空部并允许药物渗透的多孔陶瓷体组成。 对应于其分布的峰值的孔径朝向预成形体的外周减小,而孔径分布的宽度变窄。
    • 10. 发明授权
    • Extraction cavity filling member and a manufacturing method thereof
    • 抽取腔填充构件及其制造方法
    • US5135394A
    • 1992-08-04
    • US754358
    • 1991-08-29
    • Yasuharu HakamatsukaHiroyuki IrieHiroshi Fukuda
    • Yasuharu HakamatsukaHiroyuki IrieHiroshi Fukuda
    • A61C8/00A61F2/00A61L27/12A61L27/56
    • A61C8/00A61K6/0008A61K6/0085A61K6/0643A61L27/12A61L27/56A61F2310/00293
    • A ceramic member for a living body includes a first end portion formed of a material having affinity with a living body and consisting of a dense material, and a second end portion formed of a material having affinity with a living body and consisting of a porous material. A method of manufacturing a ceramic member for a living body, includes the steps of mixing a ceramic powder having affinity with a living body, water, and a binder to prepare a dense material slurry, mixing a ceramic powder having affinity with a living body, water, a binder, and a foaming agent to prepare a porous material slurry, injecting, in order to form a two-layered base material consisting of the dense material slurry and the porous material slurry, the dense material slurry and the porous material slurry obtained in the two steps in a mold such that the dense and porous material slurries are not mixed with each other, and drying the base material, and after the drying step, heating the base material at a predetermined rate, and sintering the base material at a predetermined temperature.
    • 用于生物体的陶瓷构件包括由与活体亲和并由致密材料组成的材料形成的第一端部和由与活体亲和力并由多孔材料组成的材料形成的第二端部 。 一种制造生物体用陶瓷构件的方法包括以下步骤:将具有亲和力的陶瓷粉末与生物体,水和粘合剂混合以制备致密材料浆料,将与活体具有亲和力的陶瓷粉末混合, 水,粘合剂和发泡剂以制备多孔材料浆料,注入以形成由致密材料浆料和多孔材料浆料组成的两层基材,得到致密材料浆料和多孔材料浆料 在模具中的两个步骤中,使致密多孔材料浆料彼此不混合,并干燥基材,并且在干燥步骤之后,以预定速率加热基材,并将基材以 预定温度。