Dynamic microvalve protection device

A method of manufacturing a non-implantable microvalve device for use in a therapeutic treatment in a vessel of a patient, the method comprising:

• a) braiding a plurality of first filaments into a tubular form, the first filaments having lengths, and the braid formed such that the first filaments are not bonded to each other along their lengths;
• b) electrospinning a base layer of a polyurethane in a wet state onto a mandrel;
• c) providing the tubular form onto the mandrel;
• d) electrospinning a top layer of the polyurethane in a wet state over the tubular form;
• e) adhering the base layer and the top layer to the tubular form;
• f) removing the tubular form from the mandrel;
• g) reducing a diameter of a portion of tubular form to form an end portion of microvalve;
• and
• h) permanently attaching the end portion of the microvalve to a catheter.