Prosthesis set

• US 7,223,293 B2
• Filed: 01/20/2003
• Issued: 05/29/2007
• Est. Priority Date: 01/18/2002
• Status: Expired due to Term

• Current Assignee: Otto Bock Healthcare Products GmbH (Albatros Son Holding BV)
• Original Assignee: Otto Bock Healthcare Products GmbH (Albatros Son Holding BV)
• Inventors: Kristensen, Tomm
• Primary Examiner(s): Stewart; Alvin J.
• Application Number:
  US10/500,927
• Publication Number:
  US 20050119755A1
• Time in Patent Office: 1,590 Days
• Field of Search: 623/32, 623/27, 623/33, 623/39, 623/43, 623/47, 623 30- 31, 623/23.44, 623 57- 65
• US Class Current: 623/32
• CPC Class Codes: A61F 2/2814 Bone stump caps
• CPC Class Codes: A61F 2/30749 Fixation appliances for connecting prostheses to the body
• CPC Class Codes: A61F 2/602 with air cushions A61F2/7843 takes precedence
• CPC Class Codes: A61F 2/78 Means for protecting prostheses or for attaching them to the body, e.g. bandages, harnesses, straps, or stockings for the limb stump
• CPC Class Codes: A61F 2002/2825 Femur
• CPC Class Codes: A61F 2002/2853 Humerus
• CPC Class Codes: A61F 2002/30172 T-shaped
• CPC Class Codes: A61F 2002/30233 Stepped cylinders, i.e. having discrete diameter changes
• CPC Class Codes: A61F 2002/30299 umbrella-shaped or mushroom-shaped
• CPC Class Codes: A61F 2002/30467 using hook and loop-type fasteners
• CPC Class Codes: A61F 2002/30827 Plurality of grooves
• CPC Class Codes: A61F 2002/30878 with non-sharp protrusions, for instance contacting the bone for anchoring, e.g. keels, pegs, pins, posts, shanks, stems, struts
• CPC Class Codes: A61F 2002/4631 the prosthesis being specially adapted for being cemented
• CPC Class Codes: A61F 2002/543 Lower arms or forearms
• CPC Class Codes: A61F 2002/7862 Harnesses or straps
• CPC Class Codes: A61F 2002/7881 using hook and loop-type fasteners
• CPC Class Codes: A61F 2002/7887 for connecting limb exoprostheses to the stump bone
• CPC Class Codes: A61F 2220/0083 using hook and loop-type fasteners
• CPC Class Codes: A61F 2230/0052 T-shaped
• CPC Class Codes: A61F 2230/0069 cylindrical
• CPC Class Codes: A61F 2230/0093 : Umbrella-shaped, e.g. mushroom-shaped
• CPC Class Codes: A61F 2310/00017 : Iron- or Fe-based alloys, e.g. stainless steel
• CPC Class Codes: A61F 2310/00023 : Titanium or titanium-based alloys, e.g. Ti-Ni alloys

Abstract

Prosthesis set (1) for persons with amputated limbs/stumps (10) where the prosthesis set consists of an anchoring part (2) arranged internally in a remaining marrow bone (11) and an external prosthesis (7). The anchoring part (2) has a bolt-like design with a stem (3) and an expanded head (4) in one end, wherein the stem (3) can be inserted and anchored in the remaining marrow bone (11). The expanded head (4) forms a subcutaneous termination of the marrow bone (11) and a local expansion (12) at the end (10) of the amputated limb. The external prosthesis (7) has an internal design (8) adapted to the local expansion.

Claims

1. A prosthesis set for a person with an amputated limb, said prosthesis set comprising:

(a) an anchoring part that is disposable in a marrow bone of the amputated limb near a stump of the limb, the anchoring part comprising a bolt-like shape with a stem and a head at one end of the stem, the stem being insertable in the marrow bone with the head disposed at an end of the marrow bone, said head having a shape such that disposition of the anchoring part in the marrow bone of the amputated limb causes a local expansion or bulge in the stump; and

(b) a prosthesis sleeve for affixing to the amputated limb, said prosthesis sleeve comprising anchoring means, comprising a bulge corresponding to the local expansion or bulge of the limb, for receiving the local expansion or bulge of the limb and establishing a local form fitting anchorage for the prosthesis sleeve.

2. The prosthesis set according to claim 1, wherein the stem comprises an expansion adjacent the head.

3. The prosthesis set according to claim 1, wherein the stem comprises at least one longitudinal groove.

4. The prosthesis set according to claim 1, wherein the head is plate shaped.

5. The prosthesis set according to claim 4, wherein the plate shaped head is slightly curved.

6. The prosthesis set according to claim 1, wherein the head is T-shaped.

7. The prosthesis set according to claim 6, wherein the T-shaped head is slightly curved.

8. A method for anchoring a prosthesis to a person with an amputated limb, said method comprising the steps of:

(i) providing the prosthesis set according to claim 7;

(ii) inserting the stem of the anchoring part into a marrow bone of the amputated limb near a stump of the limb with the head of the anchoring part disposed at an end of the marrow bone, said head having a width that exceeds the width of the marrow bone in an amount such that disposition of the anchoring part in the marrow bone of the amputated limb causes a local expansion or bulge at a distal end of the stump that is wider than an adjacent proximal part of the amputated limb; and

(iii) affixing the prosthesis sleeve to the amputated limb with the local expansion or bulge in the stump received in the bulge of the prosthesis sleeve to anchor the prosthesis sleeve to the amputated limb.

9. A method for anchoring a prosthesis to a person with an amputated limb, said method comprising the steps of:

(i) providing the prosthesis set according to claim 6;

(ii) inserting the stem of the anchoring part into a marrow bone of the amputated limb near a stump of the limb with the head of the anchoring part disposed at an end of the marrow bone, said head having a width that exceeds the width of the marrow bone in an amount such that disposition of the anchoring part in the marrow bone of the amputated limb causes a local expansion or bulge at a distal end of the stump that is wider than an adjacent proximal part of the amputated limb; and

(iii) affixing the prosthesis sleeve to the amputated limb with the local expansion or bulge in the stump received in the bulge of the prosthesis sleeve to anchor the prosthesis sleeve to the amputated limb.

10. The method according to claim 9, wherein in step (ii) the stem is inserted into the marrow bone with the head of the anchoring part disposed transverse to the end of the marrow bone.

11. The prosthesis set according to claim 1, wherein the stem and head of the anchoring comprise titanium.

12. The prosthesis set according to claim 1, wherein the stem and head of the anchoring part comprise surgical steel.

13. The prosthesis set according to claim 1, wherein the prosthesis sleeve comprises fastening means for fastening the prosthesis sleeve to the amputated limb.

14. The prosthesis set according to claim 13, wherein the fastening means comprises strap means for adjustable affixation of the prostheses sleeve around a circumference of the amputated limb.

15. A method for anchoring a prosthesis to a person with an amputated limb, said method comprising the steps of:

(i) providing the prosthesis set according to claim 14;

(ii) inserting the stem of the anchoring part into a marrow bone of the amputated limb near a stump of the limb with the head of the anchoring part disposed at an end of the marrow bone, said head having a width that exceeds the width of the marrow bone in an amount such that disposition of the anchoring part in the marrow bone of the amputated limb causes a local expansion or bulge at a distal end of the stump that is wider than an adjacent proximal part of the amputated limb;

(iii) affixing the prosthesis sleeve to the amputated limb with the local expansion or bulge in the stump received in the bulge of the prosthesis sleeve to anchor the prosthesis sleeve to the amputated limb; and

(iv) fastening the strap around the amputated limb.

16. The method according to claim 15, wherein in step (ii) the stem is inserted into the marrow bone with the head of the anchoring part disposed transverse to the end of the marrow bone.

17. A method for anchoring a prosthesis to a person with an amputated limb, said method comprising the steps of:

(i) providing the prosthesis set according to claim 1;

(ii) inserting the stem of the anchoring part into a marrow bone of the amputated limb near a stump of the limb with the head of the anchoring part disposed at an end of the marrow bone, said head having a width that exceeds the width of the marrow bone in an amount such that disposition of the anchoring part in the marrow bone of the amputated limb results in a local expansion or bulge at a distal end of the stump that is wider than an adjacent proximal part of the amputated limb; and

(iii) affixing the prosthesis sleeve to the amputated limb with the local expansion or bulge in the stump received in the bulge of the prosthesis sleeve to anchor the prosthesis sleeve to the amputated limb.

18. The method according to claim 17, wherein in step (ii) the stem is inserted into the marrow bone with the head of the anchoring part disposed transverse to the end of the marrow bone.

19. The prosthesis set according to claim 1, wherein the local form fitting anchorage that is established by the anchoring means provides for a transfer of torsion forces from the stump to a prosthesis received in the prosthesis sleeve.

20. The prosthesis set according to claim 1, wherein the stem is insertable in the marrow bone with the head disposed transverse to the end of the marrow bone.