摘要:
A power assisted method and injector device for controllably delivering to patients a dispersion medicament or diagnostically active agent, the homogeneity of which is preserved throughout delivery. Diagnostically active agents disclosed are gas microbubble suspensions useful in ultrasonic diagnostic imaging and liposomal formulations in which liposome vesicles are loaded with iodinated compounds.
摘要:
Disclosed are suspensions of gas microbubbles immobilised within a frozen aqueous carrier liquid comprising usual additives and stabilisers, in which the carrier liquid is a physiologically acceptable, the immobilised gas microbubbles are microbubbles bound by an evanescent envelope or a tangible membrane. The suspensions, when in liquid form, are injectable and useful as a contrast agents in ultrasonic imaging of blood pool and tissue of living beings. The gas microbubbles are immobilised within the carrier by freezing a suspension of microbubbles with average sizes below 50 .mu.m, preferably below 10 .mu.m and more preferably between 2 .mu.m and 8 .mu.m, to a temperature between -1.degree. C. and -76.degree. C. and maintaining this temperature for prolonged periods of time. The microbubbles may be stabilised by a surfactant such as a lamellar phospholipid or may comprise a membrane made of synthetic or natural polymer or protein. A method of cold storage of microbubble suspensions as well as their use is also disclosed.
摘要:
The invention relates to injectable media for ultrasonic echography in the form of microbubbles or microballoons comprising at least two biocompatible substances A and B (gaseous at the body temperature) forming a mixture which when in suspension with usual surfactants, additives and stabilisers provides useful ultrasound contrast agents. At least one of the components (B) in the mixture is a gas whose molecular weight is greater than 80 daltons and whose solubility in water is below 0.0283 ml per ml of water at standard conditions. The presence of the first component (B) in the contrast medium may vary between 0.5 and 41 volume percent. The other component (A) of the ultrasound contrast media is a gas or a mixture of gases whose molecular weight is below 80 daltons. The second component is present in a proportion of between 59-99.5% by vol., and is preferably chosen from oxygen, air, nitrogen, carbon dioxide or mixtures thereof. Gas mixtures described are found to be very effective as ultrasound contrast media. The invention also comprises a method of making the ultrasound contrast medium, the contrast agent and the ultrasound agent kit.
摘要:
The invention relates to injectable media for ultrasonic echography in the form of microbubbles or microballoons comprising at least two biocompatible substances A and B (gaseous at the body temperature) forming a mixture which when in suspension with usual surfactants, additives and stabilisers provides useful ultrasound contrast agents. At least one of the components (B) in the mixture is a gas whose molecular weight is greater than 80 daltons and whose solubility in water is below 0.0283 ml per ml of water at standard conditions. The presence of the first component (B) in the contrast medium may vary between 0.15 and 41 volume percent. The other component (A) of the ultrasound contrast media is a gas or a mixture of gases whose molecular weight is below 80 daltons. The second component is present in a proportion of between 59-99.5% by vol., and is preferably chosen from oxygen, air, nitrogen, carbon dioxide or mixtures thereof. Gas mixtures described are found to be very effective as ultrasound contrast media. The invention also comprises a method of making the ultrasound contrast medium, the contrast agent and the ultrasound agent kit.
摘要:
Disclosed are injectable suspensions of gas filled microbubbles in an aqueous carrier liquid usable as contrast agents in ultrasonic echography. The suspensions comprise amphipathic compounds of which at least one may be a laminarized phospholipid as a stabilizer of the microbubbles against collapse with time and pressure. The concentration of phospholipids in the carrier liquid is below 0.01% wt but is at least equal to or above that at which phospholipid molecules are present solely at the gas microbubble-liquid interface. Also disclosed is a method of preparation of the stable suspensions of air or gas filled microbubbles.
摘要:
Composition for diagnostic or therapeutic use which comprises an assembly comprising an active agent. The assembly comprises a liposome and a plurality of micellar components associated thereto, said micellar components being associated to the outer surface of the envelope of said liposome through a substantially electrostatic interaction. When an active compound is incorporated into the micelles, a substantial amount of said active compound can be linked to a singe liposome. Furthermore, the presence of the outer micellar layer allows to increase the residence time of said liposome in the blood stream.
摘要:
The invention relates to a formulation comprising a dry material (e.g. lyophilised or spray dried) comprising at least one film forming surfactant and a gas or a gas mixture usable in diagnostic imaging, to a process for the preparation thereof and to a suspension obtainable by reconstituting said formulation with an aqueous carrier for use in contrast imaging. The invention also relates to a container comprising the dry material in contact with a gas. The gas associated with the dry material is at a pressure lower than the atmospheric pressure.
摘要:
The invention relates to a dry deposit as a precursor to liposome vesicles, the precursor being a three dimensional expanded structure with bulk density between 0.01 and 0.001 g/cm.sup.3. The invention also concerns a method of making liposome vesicles with an enhanced entrapment capacity by dissolving one or more film forming lipids in at least one organic solvent to form a solution in a reaction vessel, evaporating the solvent to form an expanded three dimensional porous lipid structure, contacting the lipid deposit with an aqueous carrier phase, and producing liposome vesicles entrapping the carrier phase as well as an apparatus comprising an array of tubing or an inert packing which serves as a material support or a matrix surface for the deposition of lipids produced according to the method.
摘要翻译:本发明涉及作为脂质体囊泡前体的干沉积物,该前体是体积密度在0.01至0.001g / cm 3之间的三维膨胀结构。 本发明还涉及通过将一种或多种成膜脂质溶解在至少一种有机溶剂中以形成溶液在反应容器中,使溶剂蒸发以形成扩展的三维多孔脂质结构,从而制备具有增强的捕获能力的脂质体囊泡的方法 使脂质沉积物与水性载体相接触,并产生包裹载体相的脂质体囊泡,以及包含管阵列或惰性填料的装置,其用作材料载体或基质表面,用于沉积根据 的方法。
摘要:
The invention relates to a dry deposit as a precursor to liposome vesicles, the precursor being a three dimensional expanded structure with bulk density between 0.01 and 0.001 g/cm.sup.3. The invention also concerns a method of making liposome vesicles with an enhanced entrapment capacity by dissolving one or more film forming lipids in at least one organic solvent to form a solution in a reaction vessel, evaporating the solvent to form an expanded three dimensional porous lipid structure, contacting the lipid deposit with an aqueous carrier phase, and producing liposome vesicles entrapping the carrier phase as well as an apparatus comprising an array of tubing or an inert packing which serves as a material support or a matrix surface for the deposition of lipids produced according to the method.
摘要翻译:本发明涉及作为脂质体囊泡前体的干沉积物,该前体是体积密度在0.01至0.001g / cm 3之间的三维膨胀结构。 本发明还涉及通过将一种或多种成膜脂质溶解在至少一种有机溶剂中以形成溶液在反应容器中,使溶剂蒸发以形成扩展的三维多孔脂质结构,从而制备具有增强的捕获能力的脂质体囊泡的方法 使脂质沉积物与水性载体相接触,并产生包裹载体相的脂质体囊泡,以及包含管阵列或惰性填料的装置,其用作材料载体或基质表面,用于沉积根据 的方法。