PVA Microporous Hydrospheres

**Semantic type:** Organic Chemical|Pharmacologic Substance

**Definition:** 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.

**Synonyms:** - Bead Block Compressible Microspheres - PVA Particles