Patent ID: 7799261

Claim:
A method for preparing a medical device comprising: providing a medical device and an electrospinning apparatus; the medical device defining a lumen with a proximal end, a distal end, a luminal surface, and an abluminal surface; the electrospinning apparatus comprising a first spinneret and a second spinneret; the first spinneret comprising a reservoir loaded with a first solution and an orifice, the first spinneret orifice comprising a proximal end fluidly coupled to the reservoir and a distal end through which the first solution is electrospun; the second spinneret comprising a reservoir loaded with a second solution and an orifice, the second spinneret orifice comprising a proximal end fluidly coupled to the reservoir and a distal end through which the second solution is electrospun; locating the first spinneret orifice distal end outside of the medical device lumen between the medical device proximal end and the medical device distal end and between about 0.1 inches and about 6.0 inches from the medical device abluminal surface, the first spinneret orifice distal end directly facing the medical device abluminal surface; locating the second spinneret orifice distal end in the medical device lumen between the medical device proximal end and the medical device distal end and between about 0.1 inches and 2.0 inches from the medical device luminal surface, the second spinneret orifice distal end directly facing the medical device luminal surface; further locating the first spinneret orifice distal end and the second spinneret orifice distal end opposite one another; simultaneously electrospinning the first solution onto the medical device abluminal surface and the second solution onto the medical device luminal surface.