An apparatus for delivery of biologically active materials comprises a catheter and balloon having micro-needles or pores. In the apparatus, the balloon can have a polymer oating containing the biologically active material, and the apparatus can include a sheath surrounding the balloon. In one embodiment...http://www.google.es/patents/US6638246?utm_source=gb-gplus-sharePatente US6638246 - Medical device for delivery of a biologically active material to a lumen
Medical device for delivery of a biologically active material to a lumen
