FILTER STERILIZATION FOR PRODUCTION OF COLLOIDAL, SUPERPARAMAGNETIC MR CONTRAST AGENTS
    2.
    发明公开
    FILTER STERILIZATION FOR PRODUCTION OF COLLOIDAL, SUPERPARAMAGNETIC MR CONTRAST AGENTS 失效
    过滤灭菌制备胶体超顺磁性MR造影剂。

    公开(公告)号:EP0514493A1

    公开(公告)日:1992-11-25

    申请号:EP91906230.0

    申请日:1991-02-06

    CPC classification number: A61K49/1809 A61K49/1863 A61L2/0017 A61L2/025

    Abstract: On a amélioré un procédé d'obtention d'une image de résonance magnétique in vivo d'un organe ou d'un tissu d'un sujet animal ou humain, du type consistant à administrer au sujet à titre d'agent de contraste permettant d'améliorer ladite image de résonance magnétique, une dose efficace d'un colloïde comprenant des particules d'oxyde de métal superparamagnétiques dispersées dans un support physiologiquement acceptable. Selon l'amélioration, le procédé consiste à préparer le colloïde d'une manière permettant de réduire la toxicité comparée à celle associée à l'administration du colloïde après stérilisation terminale. L'amélioration peut comprendre la stérilisation du colloïde par filtration. Dans un mode de réalisation supplémentaire, on peut stériliser le colloïde par filtration et le conserver par lyophilisation. On peut lyophiliser le colloïde en présence d'un excipient compatible. L'excipient utilisé peut comprendre un dextran ou un anion de citrate. D'autres modes de réalisation comprennent des compositions et des procédés apparentés.

    SYNTHESIS OF POLYSACCHARIDE COVERED SUPERPARAMAGNETIC OXIDE COLLOIDS
    4.
    发明公开
    SYNTHESIS OF POLYSACCHARIDE COVERED SUPERPARAMAGNETIC OXIDE COLLOIDS 失效
    多糖的用涂超PARA磁性氧化物胶体合成

    公开(公告)号:EP0713602A1

    公开(公告)日:1996-05-29

    申请号:EP93920085.0

    申请日:1993-08-12

    CPC classification number: H01F1/445 A61K49/1809 A61K49/1863

    Abstract: In a method for the synthesis of a colloid including a superparamagnetic metal oxide coated with a polymer, an acidic solution of a metal salt and a polymer may be cooled, and then neutralized by the controlled addition of a cool solution of a base, and may then be converted, by the application of heat, to a homogenous superparamagnetic metal oxide colloid. According to a preferred embodiment, the polymer may be a polysaccharide. In a further embodiment of the invention, the polysaccharide may be dextran and the metal salt may be ferrous and ferric salts, which produces, according to the methods of the invention, a superparamagnetic iron oxide colloid with an extended plasma half-line.

    FILTER STERILIZATION FOR PRODUCTION OF COLLOIDAL, SUPERPARAMAGNETIC MR CONTRAST AGENTS and the use thereof
    5.
    发明授权
    FILTER STERILIZATION FOR PRODUCTION OF COLLOIDAL, SUPERPARAMAGNETIC MR CONTRAST AGENTS and the use thereof 失效
    过滤灭菌制备胶体超顺磁共振造影剂及其使用

    公开(公告)号:EP0514493B1

    公开(公告)日:1996-03-27

    申请号:EP91906230.7

    申请日:1991-02-06

    CPC classification number: A61K49/1809 A61K49/1863 A61L2/0017 A61L2/025

    Abstract: An improvement is provided to a method for obtaining an in vivo MR image of an organ or tissue of an animal or human subject, of the type including administering to the subject as a contrast agent to enhance such MR image an effective amount of a colloid including superparamagnetic metal oxide particles dispersed in a physiologically acceptable carrier. In accordance with the improvement, the method includes preparing the colloid in a manner that provides a reduction in toxicity in comparison with that associated with administration of the colloid after terminal sterilization. The improvement may include sterilizing the colloid by filtration. In an additional embodiment, the colloid may be sterilized by filtration and preserved by lyophilization. The colloid may be lyophilized in the presence of a compatible excipient. The excipient utilized may include a dextran or a citrate anion. Other embodiments include related compositions and methods.

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