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NCI Drug Dictionary

  

PVA microporous hydrospheres 
An embolic material composed of microspheres of polyvinyl alcohol (PVA) polymers. These water-soluble, compressible microspheres may be used to encapsulate various therapeutic agents; drug-loaded microspheres can then be used as a drug delivery vehicle during embolization of tumor vasculature. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
US brand name:Bead Block Compressible Microspheres