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    • 63. 发明授权
    • Storage stable calcium phosphate cements
    • 储存稳定的磷酸钙水泥
    • US6053970A
    • 2000-04-25
    • US345984
    • 1999-06-30
    • Ira C. IsonMark T. FulmerBryan M. BarrBrent R. Constantz
    • Ira C. IsonMark T. FulmerBryan M. BarrBrent R. Constantz
    • A61F2/00A61L27/12C04B12/02C04B20/10C04B28/34C04B40/06
    • C04B20/107A61L27/12C04B12/025C04B20/1077C04B28/34C04B28/344C04B40/06A61F2310/00293C04B2111/00836Y10S623/901Y10T428/2949Y10T428/2991Y10T428/2993
    • Two component, storage stable apatitic cement compositions, as well as methods for their production, are provided. The dry component of subject apatitic cements comprises basic calcium source particles at least partially coated with a partially neutralized acidic calcium phosphate. The dry component of subject compositions is prepared by combining basic calcium source particles with dissolved acidic phosphate in at least a partially aqueous medium, whereby the basic calcium source particles become partially coated with a partially neutralized acidic calcium phosphate. The reaction is terminated prior to completion of the reaction between the acidic phosphate and the basic calcium source by removing the available water from the reaction mixture. In a first mode, the subject cement may be produced by mechanically mixing an acidic phosphate source with basic calcium source particles in the presence of an aqueous solvent and stopping the reaction between the acid and base prior to completion. Alternatively, a phosphoric acid solution may be rapidly combined with a basic calcium phosphate particle slurry such that partially neutralized acidic calcium phosphate precipitates on the surface of the basic calcium phosphate particles.
    • 提供了两种组分的储存稳定的磷灰石水泥组合物,以及它们的生产方法。 受试者磷灰石水泥的干组分包括至少部分涂覆有部分中和的酸性磷酸钙的碱性钙源颗粒。 通过将碱性钙源颗粒与溶解的酸性磷酸盐在至少部分水性介质中组合来制备主体组合物的干组分,由此碱性钙源颗粒部分地涂覆有部分中和的酸性磷酸钙。 在酸性磷酸盐和碱性钙源之间的反应完成之后,通过从反应混合物中除去可用的水来终止反应。 在第一模式中,主体水泥可以通过在水性溶剂的存在下将酸性磷酸盐源与碱性钙源颗粒机械混合并在完成之前停止酸和碱之间的反应来制备。 或者,磷酸溶液可以与碱性磷酸钙颗粒浆料快速组合,使得部分中和的酸性磷酸钙在碱性磷酸钙颗粒的表面上沉淀。
    • 68. 发明授权
    • Devices and methods for treating aortic valve stenosis
    • 用于治疗主动脉瓣狭窄的装置和方法
    • US08728026B2
    • 2014-05-20
    • US11295677
    • 2005-12-05
    • Brent R. ConstantzPeter K. Johansson
    • Brent R. ConstantzPeter K. Johansson
    • A61M25/10
    • A61M25/10A61B17/22A61B17/320708A61B2017/22082A61B2017/22097A61M25/1011A61M2025/1013A61M2025/1015A61M2025/1052
    • Devices and methods for their use in increasing the aortic valve flow of a stenotic aortic valve are provided. The subject devices include an aortic valve isolation element and an aortic valve flushing element. The aortic valve isolation element is made up of a ventricular side aortic valve occlusion element, coronary ostia occlusion elements and an ascending aorta occlusion element. The aortic valve flushing element is made up of a dissolution fluid introducing element and a fluid removal element. In practicing the subject methods, a stenotic aortic valve is first isolated. Next, the isolated valve is flushed with a dissolution fluid, e.g., an acidic dissolution fluid, for a period of time sufficient for the aortic valve flow of the treated valve to be increased. In certain embodiments, the valve is also contacted with a dissolution fluid attenuating fluid, e.g., a buffer, during the flushing step in order to limit the contact of non-valve tissue with the dissolution fluid. Also provided are systems and kits that include the subject devices and can be employed in practicing the subject methods. The subject devices, methods, systems and kits find use in treating conditions associated with the presence of stenotic aortic valves.
    • 提供了用于增加狭窄主动脉瓣主动脉瓣流量的装置和方法。 主体装置包括主动脉瓣隔离元件和主动脉瓣冲洗元件。 主动脉瓣隔离元件由心室侧主动脉瓣闭塞元件,冠状动脉闭塞元件和升主动脉闭塞元件组成。 主动脉瓣冲洗元件由溶解流体引入元件和流体去除元件组成。 在实践主题方法中,首先分离狭窄的主动脉瓣。 接下来,将隔离的阀用溶解流体例如酸性溶解流体冲洗一段足以使被处理的阀的主动脉瓣流动增加的时间。 在某些实施方案中,在冲洗步骤期间,阀还与溶解流体衰减流体例如缓冲液接触,以限制非阀组织与溶解流体的接触。 还提供了包括主题装置并且可以用于实践主题方法的系统和工具包。 主题装置,方法,系统和试剂盒可用于治疗与狭窄主动脉瓣的存在相关的病症。