CATHETER METHOD OF MANUFACTURE

Abstract

The present invention relates to a method for coating the lumen of a tube using fluid displacement techniques. In some embodiments, the method involves introducing a first coating solution into the lumen of the tube using a positive or negative displacement, draining the excess solution to leave a film on the inner surface, and curing the film to form a uniform coating. In some embodiments, the displacement system can include a piston pump, peristaltic pump, and/or syringe. In some embodiments, a first coating solution may comprise a mixture of polyaziridine and either polyurethane or polyacrylate, while a second coating solution may comprise polysaccharide and/or polyacrylic acid and may be hydrophilic. Additional steps may include applying multiple layers, coating both the inner and outer surfaces of the tube, and/or using gas to drain the coating solution. In some embodiments, multiple tubes can be coated simultaneously using a manifold assembly.

CPC Classifications