LINER FOR PROSTHETIC AND ORTHOPEDIC SYSTEMS

• US 20130035770A1
• Filed: 09/12/2012
• Published: 02/07/2013
• Est. Priority Date: 08/02/2007
• Status: Active Grant

• Current Assignee: Ossur hf
• Original Assignee: Ossur hf
• Inventors: EGILSSON, Egill Sveinbjorn, GUDNASON, Palmar I., HALLDORSSON, Olafur, ELEFSEN, Thordur
• Granted Patent: US 9,050,201 B2
• Time in Patent Office: Days
• US Class Current: 623/36
• CPC Class Codes: A61F 2/7812 Interface cushioning members placed between the limb stump and the socket, e.g. bandages or stockings for the limb stump
• CPC Class Codes: A61F 2002/30024 differing in coefficient of friction
• CPC Class Codes: A61F 2002/5055 Reinforcing prostheses by embedding particles or fibres during moulding or dipping, e.g. carbon fibre composites
• CPC Class Codes: A61F 2002/5056 Laminates, i.e. layered products
• CPC Class Codes: A61F 2002/7818 Stockings or socks for the limb stump cosmetic coverings A61F2002/5001
• CPC Class Codes: A61F 2002/785 Pads, e.g. relief pads
• CPC Class Codes: A61F 2210/0076 multilayered, e.g. laminated structures
• CPC Class Codes: A61F 2250/0021 differing in coefficient of friction
• CPC Class Codes: A61F 2250/0023 differing in porosity
• CPC Class Codes: A61L 2420/08 Coatings comprising two or more layers
• CPC Class Codes: A61L 27/26 Mixtures of macromolecular compounds
• CPC Class Codes: A61L 27/56 Porous materials, e.g. foams or sponges

Abstract

A liner is arranged for use in prosthetic and orthopedic devices. The liner defines first and second end portions, and inner and outer surfaces. The liner includes an inner layer having a frictional component and forms at least part of the periphery of the inner liner surface. The inner layer defines a plurality of apertures. A porous element is in communication with the inner liner surface and is connected to the inner layer such that the apertures permit a transfer of air from the inner surface to the porous element. A base layer adjoins the porous element and extends between the first and second end portions of the liner.

Claims

1. A liner having first and second end portions, and defining inner and outer surfaces, the liner comprising:

a frictional layer forming at least part of the periphery of the inner surface, the frictional layer defining a plurality of apertures located along the inner surface, the frictional layer having skin tackiness properties;

a porous element in communication with the inner surface and connected to the frictional layer, the apertures of the frictional layer permitting a transfer of air from the inner surface to the porous element; and

a base layer connected to the porous element and having greater rigidity than the porous element, the base layer extending at least between the proximal and distal areas of the liner.

wherein the porous element extends through the thickness of one area of the base layer such that the porous element permits a transfer of air from the inner surface through a thickness of the porous element and out from the outer surface of the liner.

2. The liner according to claim 1, wherein a thickness of the porous element is coextensive with a thickness of the base layer.

3. The liner according to claim 1, wherein the porous element is a three-dimensional woven synthetic material.

4. The liner according to claim 1, wherein the porous element is a polymeric-based foam.

5. The liner according to claim 4, wherein the polymeric-based foam includes discrete portions of a moisture-absorbing material.

6. The liner according to claim 5, wherein the porous element is generally hydrophobic.

7. The liner according to claim 1, wherein the frictional layer is directly laminated to the porous element thereby forming a laminate structure.

8. The liner according to claim 1, wherein the porous element is directly joined to the base layer.

9. The liner according to claim 1, wherein the porous layer includes a plurality of polymeric threads arranged in a parallel configuration.

10. The liner according to claim 9, further comprising an additional porous layer including a plurality of polymeric threads arranged in a parallel configuration, the porous layer and the additional layer being arranged adjacent relative to one another such that the threads of the porous layer are oriented obliquely relative to the threads of the additional layer.

11. The liner according to claim 1, wherein the porous layer includes discrete portions of a moisture-absorbing material.

12. The liner according to claim 1, wherein the base layer is liquid and vapor impervious.

13. The liner according to claim 1, wherein the base layer is close-ended at a first end portion of the liner, and defines a conical shape located between the first and second end portions of the liner.

14. The liner according to claim 1, wherein the frictional layer is moisture and vapor impervious.

15. A liner having first and second end portions, and defining inner and outer surfaces, the liner comprising:

a base layer extending between the first and second end portions, the base layer being moisture and vapor impervious;

a porous layer connected to the base layer; and

an inner layer forming at least part of the periphery of the inner surface, and connected to the porous layer, the inner layer defining a plurality of apertures providing fluid communication of the porous layer with the inner surface;

wherein a portion of the porous layer channels moisture from the inner surface to at least one of the first and second end portions and out from the liner.

16. The liner according to claim 15, wherein the inner layer includes a frictional feature surrounding the apertures along the inner surface and possessing skin tackiness properties.

17. A liner for a prosthesis having distal and proximal areas, comprising:

an elongate, closed-ended, generally conical, polymer construct, the polymer construct comprising two or more layers of packed polymer balls.

18. The liner according to claim 17, wherein adjacent polymeric balls are in contact.

19. The liner according to claim 17, wherein the polymeric balls are spheres.

20. The liner according to claim 17, wherein the polymeric balls have the same diameter.