Embolic particles are described. The particles are reaction products of a prepolymer solution including at least one polyether macromer and an appropriate monomer.
根据描述,这些颗粒是预聚物溶液的反应产物,包括至少一种聚醚大分子和适当的单体。
Contrast agents
申请人:Nycomed Imaging AS
公开号:US20030031629A1
公开(公告)日:2003-02-13
The invention relates to ultrasound contrast agents comprising vesicles comprising a protein capable of formation of gas-containing vesicles, wherein the vesicles contain gas which comprises sulphur hexafluoride or a low molecular weight fluorinated hydrocarbon. These contrast agents exhibit stability in vivo upon administration so as to permit ultrasound visualization while allowing rapid subsequent elimination from the system.
The present invention relates to biodegradable polymers containing diester units of formula (I) --CO--O--C(R.sup.1 R.sup.2)--O--CO-- where R.sup.1 and R.sup.2 each represents a hydrogen atom or a carbon-attached monovalent organic group, or R.sup.1 and R.sup.2 together form a carbon-attached divalent organic group.
A method of crosslinking a crosslinkable protein or carbohydrate substrate to form a crosslinked substrate in which the crosslinking groups are biodegradable. The crosslinking groups may comprise methylene diacrylate and the substrate can be galactose.
Ultrasound contrast agents comprising microbubbles of gas or a gas precusor encapsulated in a protein shell, e.g. of human serum albumin, the protein being crosslinked with biodegradable crosslinking groups, exhibit stability in vivo upon administration so as to permit ultrasound visualisation while allowing rapid subsequent elimination from the system.