English: Two main categories are defined depending on the texture: semi-solids and solids. Semi-solids can be applied using a syringe and due to their plasticity may even envelop the vessel. In the category of solids, meshes are tubular structures made of a net of metallic wires or polymeric threads forming a macroporous system. Sheaths, cuffs, wraps (also called films or sheets) and matrices are formed by amorphous polymers. They can have a tubular, curved or planar geometry. The tubular systems (sheaths) can be applied like a sock on the periphery of the vein. Planar systems can be wrapped around (wrap) the vein or sutured (cuff), while matrices are placed near the vessel wall.
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