초록 ▼

A method of making hand-actuated retention catheter 5 is disclosed. The retention catheter includes a tube 12, an overcoat layer 14 encircling the tube 12 and a cavity 16 interposed between the tube 12 and the overcoat layer 14. The cavity 16 encircles the tube and includes a bulbous balloon portion

A method of making hand-actuated retention catheter 5 is disclosed. The retention catheter includes a tube 12, an overcoat layer 14 encircling the tube 12 and a cavity 16 interposed between the tube 12 and the overcoat layer 14. The cavity 16 encircles the tube and includes a bulbous balloon portion 24 and an enlarged fluid reservoir portion 22 interconnected and separated by a catheter sleeve portion 26 which has a narrowed outside diameter. The expandable balloon portion 24 can be expanded by compressing the fluid reservoir portion 22. A variabale thickness coating of bond-preventing agent is formed on a polymeric structure prior to dipping in a polymeric material to form the overcoat layer.

대표청구항 ▼

A method of making a silicone rubber catheter having an overcoat layer enclosing a cavity on an outer surface of an inner tube of the catheter, wherein the cavity separates the overcoat layer from the inner tube, said method comprising: (a) providing a silicone rubber tube; (b) initially coating por

A method of making a silicone rubber catheter having an overcoat layer enclosing a cavity on an outer surface of an inner tube of the catheter, wherein the cavity separates the overcoat layer from the inner tube, said method comprising: (a) providing a silicone rubber tube; (b) initially coating portions of an outer surface of said silicone rubber tube with a bond preventing agent in a plurality of dipping steps, wherein the tube is immersed into the bond preventing agent to a depth for a length of time, and subsequently removed therefrom, said plurality of dipping steps being automated in series by mechanized automation means including computer control means, wherein the depth and the length of time for each of the plurality of dipping steps is prescribed so that a residual coating of bond preventing agent remains on portions of the silicone rubber tube following said plurality of dipping steps, said residual coating having a variable thickness as a result of a variation between the depth of any two of said plurality of dipping steps; and (c) subsequently coating the silicone rubber tube having the residual coating of bond preventing agent with a polymeric bonding composition containing silicone rubber to form a shaped overcoat layer, wherein the shape of the overcoat layer results at least in part from the variable thickness of the residual coating.