Hydrogel entrapping therapeutic agent and stent with coating comprising this

   
   

A hydrogel forming system which comprises a hydrophobic macromer with unsaturated group terminated ends and a hydrophilic polymer which is a polysaccharide containing hydroxy groups which are reacted with unsaturated group introducing compound, is convertible by free radical polymerization to form a hydrogel containing a three dimensional crosslinked polymer network containing hydrophobic and hydrophilic components. Agent can be entrapped in the polymer network, e.g., drugs, macromolecules or synthetic or natural polymers, for controlled release therefrom. In one embodiment, a vascular stent is coated with hydrogel with therapeutic agent entrapped therein.

Un hydrogel que forma el sistema que abarca un macromer hidrofóbico con extremos terminados grupo no saturado y un polímero hidrofílico que sea un polisacárido que contiene a los grupos hydroxy que se reaccionan con el grupo no saturado que introduce el compuesto, es convertible por la polimerización del radical libre formar un hydrogel que contiene una red reticulada tridimensional del polímero que contiene componentes hidrofóbicos e hidrofílicos. El agente puede ser encerrado en la red del polímero, e.g., drogas, macromoléculas o polímeros sintéticos o naturales, para el lanzamiento controlado therefrom. En una encarnación, un stent vascular está cubierta con hydrogel con el agente terapéutico encerrado en esto.

 
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