366 results about "Therapeutic embolization" patented technology

The present invention relates to microspheres useful for embolization which comprises polyvinylalcohol. The present invention also relates to an injectable suspension suitable for embolization which comprises the polyvinylalcohol microspheres and a suitable liquid carrier. The present invention further relates to a method for prophylactic or therapeutic embolization which comprises administering to a mammal an injectable suspension containing the polyvinylalcohol microspheres and a suitable liquid carrier. Finally, the present, invention relates to a process for producing the polyvinylalcbhol microspheres.

The present invention relates to porous embolization devices, methods of making and using the devices as well as methods and devices to hydrate and deliver embolization particle(s).

The present invention relates to injectable compositions comprising biocompatible, swellable, substantially hydrophilic, non-toxic and substantially spherical polymeric material carriers which are capable of efficiently delivering bioactive therapeutic factor(s) physically linked to a transfection agent for use in embolization gene therapy. The present invention further relates to methods of embolization gene therapy, particularly for the treatment of angiogenic and non-angiogenic-dependent diseases, using the injectable compositions.

The invention concerns a radiopaque, non-biodegradable, water-insoluble iodinated benzyl ether of poly(vinyl alcohol) consisting of a PVA having covalently grafted thereon iodinated benzyl groups comprising 1-4 iodine atoms per benzyl group, a process for preparing the same comprising reacting a 0-100% hydrolyzed PVA with a iodinated benzyl derivative comprising 1-4 iodine atoms per benzyl group in a polar aprotic solvent in the presence of a base in anhydrous conditions. Said iodo-benzylether-PVA is particularly useful as embolic agent in an injectable embolizing composition. The invention also concerns an injectable embolizing composition comprising said iodo-benzylether-PVA and capable of forming a cohesive mass upon contact with a body fluid by precipitation of the iodo-benzylether-PVA. Said injectable embolizing composition is particularly useful for forming in-situ a cohesive mass in a blood vessel or into a tumor. The invention further concerns a coating composition containing said iodo-benzylether-PVA and capable of forming a radiopaque coating on a medical device. The invention further concerns particles formed of said iodo-benzylether-PVA.

The invention provides an embolism material composition as well as preparation method and use thereof, the embolism material composition is prepared from reactant raw materials, wherein the reactant raw materials comprise a biocompatibility material, a roentgenopaque substance and a magnetic resonance imaging substance, the roentgenopaque substance and the magnetic resonance imaging (MRI) substance are covered by the biocompatibility material. The embolism material composition not only can be directly detected by an X-ray image device, but also can be directly detected by the MRI, so that a doctor can select a detection method according to self condition of a patient and the medical device condition.

The present invention provides a process for preparing cross-linked sodium hyaluronate microspheres capable of being adopted as an emboliaztion agent by adopting sodium hyaluronate as a raw material. The process comprises the following steps: preparing a sodium hyaluronate alkaline solution gel with a concentration of 10-30% g/ml; adding the sodium hyaluronate alkaline solution gel to an emulsifier-containing oil phase, and carrying out high speed emulsification through a shearing machine, wherein an emulsification speed is 500-2000 rpm, and a time is 10-20 min; adding a certain amount of a cross-linking agent, stirring for 4-6 h at a room temperature, carrying out a cross-linking reaction, and standing overnight after completing the reaction, wherein a mass percentage of the cross-linking agent in the oil phase is 0.2-2%; and adopting a water-soluble organic solvent to wash to remove the oil phase remained on the surface of the microspheres, and finally drying to obtain the cross-linked sodium hyaluronate microspheres. According to the present invention, the preparation process is simple; and the size of the obtained microspheres is suitable for routine blood vessel emboliaztion, and the obtained microspheres have characteristics of controllable particle size, good microsphere shape, easy screening, elasticity, expandibility, no toxic-side effect on human body, good biocompatibility, good biodegradability, and ensured clinical safety.

This relates to partially acetalized polyvinyl alcohol embolization particles suitable for implanting in the human body, to compositions containing those particles, and to methods of making and using them.

The invention provides a pharmaceutical composition for treating embolism and a preparation method thereof, the pharmaceutical composition comprises a hydroxyl-contained biocompatible polymer materialand a monomer containing unsaturated double bonds and anion groups, as well as a polymer generated by polymerization reaction of an optional vinyl monomer, wherein the polymerization is initiated through free radicles, and bleomycin or pingyangmycin is combined on the anion groups of the generated polymer. The preparation method combines the bleomycin or the pingyangmycin on a carrier of the polymer, thereby being capable of fully playing the dual effects of an anti-tumor antibiotic and a hardening agent owned by the bleomycin or the pingyangmycin during the embolism treatment. The anion partof the polymer can be properly combined with the bleomycin or the pingyangmycin which is rich in amino groups, thereby not only realizing the higher drug loading, but also leading the drug in an emboliaztion agent to be exchanged by cation in human body, and further realizing the slow release. In addition, the embolic carrier of the polymer has the advantages of simple prepration technology andlow cost, thereby being applicable to large-scale industrial production.

The invention relates to a temperature response type injectable hydrogel and a preparation method and the usage of the injectable hydrogel; the hydrogel comprises component A, component B and water, wherein the component A is cholesterol-polyethylene glycol-cholesterol; and the component B is amination beta cyclodextrin graft hydroformylation glucan. The preparation process of the injectable hydrogel is simple and convenient, and the prepared injectable hydrogel has a certain strength and toughness as well as self-repairability; compared with the prior art, the invention improves the controllability of the performances of the hydrogel, and further improves the biocompatibility of the hydrogel; the hydrogel prepared by the invention has biodegradability and can be etabolized by human body; and the hydrogel has temperature responsiveness and injectability, and can be used for a drug carrier, embolism material and tissue engineering material.

Absorbable particles which comprises poly-4-hydroxybutyrate and/or its copolymers are formulated in injectable suspension suitable for prophylactic or therapeutic embolization, which comprises administering to a human or animal the injectable suspension process for producing particles of the poly-4-hydroxybutyrate and/or its copolymer.

Devices and methods that a variety of embolization plugs for treatment of endovascular and non-endovascular defects are disclosed. The plugs have multiple braids that include an outer expandable braid and an inner expandable braid that is located inside the outer expandable braid.

Compositions comprising crystalline apixaban particles having a D₉₀ equal to or less than 89 μm, and a pharmaceutically acceptable carrier, are substantially bioequivalent and can be used to for the treatment and/or prophylaxis of thromboembolic disorders.

An aneurysm embolization device includes at least: a sac-shaped balloon dome part which is inserted into the aneurysm, then expanded and left therein; and a balloon plane part which is provided at an opening of the balloon dome part and covers a mouth part of the aneurysm. The balloon plane part has a hole communicating with the inside of the balloon dome part. The aneurysm embolization device thus constituted is housed into a lumen of a protective outer sheath member formed of a flexible elongated-body having the lumen therein. A tip part of the protective outer sheath member is placed at a desired position, and the aneurysm embolization device is ejected from the tip part of the protective outer sheath member. The aneurysm embolization device thus ejected includes the balloon dome part placed at a desired position and the balloon plane part deploying to cover the desired position.

The invention discloses a culture method, application and a combined preparation of a hypoxia mesenchymal stem cell. By adopting an umbilical or placenta mesenchymal stem cell and combining the means of transfusing compound amino acid injection and the like, the vitality, the implantation survival rate and the treating effect of the mesenchymal stem cell in vivo can be improved; and in order to avoid the possibility of conglutination, conglomerating and cell mass embolism of the mesenchymal stem cell in blood vessel, the matching of saline containing heparin during treatment can be carried out by a mode of intravenous injection or intravenous drip. With more than three times of treatment, physical conditions of curee can be remarkably improved and objective indicators such as immunity, blood fat, blood sugar and the like can be remarkably improved.