Patent ID: 8795577

Claim:
A method for preparing a medical device, the method comprising: providing the medical device, the medical device comprising a first surface and an opposing second surface; providing an electrospinning apparatus, the electrospinning apparatus comprising a first spinneret and a second spinneret located substantially opposite the first spinneret, the first spinneret comprising a reservoir and an orifice fluidly coupled to the first spinneret reservoir, the second spinneret comprising a reservoir and an orifice fluidly coupled to the second spinneret reservoir; applying a first electrical charge to the first spinneret; applying a second electrical charge to the second spinneret, a sign of the second electrical charge being the same as a sign of the first electrical charge; applying a third electrical charge to the medical device, a sign of the third electrical charge being opposite of the sign of the first electrical charge and the sign of the second electrical charge; locating the first spinneret orifice nearby the medical device first surface; locating the second spinneret orifice nearby the medical device second surface; simultaneously electrospinning a first solution onto the medical device first surface with the first spinneret and a second solution onto the medical device second surface with the second spinneret.