INTRAMEDULLARY PIN FOR INSERTION INTO THE MEDULLARY SPACE OF A FEMUR

• US 20130053849A1
• Filed: 10/22/2012
• Published: 02/28/2013
• Est. Priority Date: 10/14/2004
• Status: Active Grant

• Current Assignee: DePuy Synthes Products LLC (Johnson & Johnson)
• Original Assignee: Synthes USA LLC (Johnson & Johnson)
• Inventors: KAUP, Thomas
• Granted Patent: US 9,039,707 B2
• Time in Patent Office: Days
• US Class Current: 606/64
• CPC Class Codes: A61B 17/72 Intramedullary pins, nails or other devices A61B17/744 takes precedence
• CPC Class Codes: A61B 17/7241 the nail having separate elements through which screws pass
• CPC Class Codes: A61B 17/7283 with special cross-section of the nail
• CPC Class Codes: A61B 17/744 the longitudinal elements coupled to an intramedullary nail

Abstract

An intramedullary pin for insertion into the medullary space of the femur through the lateral compacta of the trochanter major. The pin has a proximal pin section and an adjoining distal pin section. Each pin section includes one or more bores for one or more bone screws. The proximal pin section has at least one bore running obliquely to the longitudinal axis, so that bone screws can be inserted through the bore into the head of the femur, or a screw can be inserted in the antegrade direction through the bore. The distal pin section is at least partly straight and the proximal pin section has a curvature in the lateral-posterior direction.

Claims

1-15. -15. (canceled)

16. An intramedullary pin, comprising:

an elongated shaft extending from a proximal end to a distal end along a central longitudinal axis, the shaft including a proximal section extending from the proximal end to a first end and a distal section extending from the first end to the distal end;

a first proximal bore extending through the proximal section along a first bore axis; and

a second proximal bore extending through the proximal section along a second bore axis, wherein the second bore intersects the first bore such that at least a portion of the first bore is open to the second bore,

wherein the distal section includes a plurality of substantially concave faces defining an outer profile thereof.

17. The intramedullary pin of claim 16, wherein the proximal section is curved.

18. The intramedullary pin of claim 17, wherein the distal section is substantially straight.

19. The intramedullary pin of claim 16, wherein the first bore intersects the second bore along an outer wall of the proximal section.

20. The intramedullary pin of claim 16, further comprising a third proximal bore extending through the proximal section along a third bore axis, wherein the third proximal bore extends parallel to the second bore.

21. The intramedullary pin of claim 20, further comprising a fourth proximal bore extending through the proximal section along a fourth bore axis, the fourth proximal bore having a substantially oval cross-section.

22. The intramedullary pin of claim 16, further comprising first and second transverse distal bores extending through the distal section, a first distal bore axis of the first distal bore extending substantially parallel to a second distal bore axis of the second distal bore.

23. The intramedullary pin of claim 22, further comprising a third transverse distal bore extending through the distal section, a third distal bore axis of the third distal bore being angularly offset from the first and second distal bore axes.

24. The intramedullary pin of claim 16, wherein the proximal end includes a lateral bevel.

25. The intramedullary pin of claim 24, wherein the proximal end further comprises a groove extending thereinto to aid in positioning of the intramedullary pin.

26. The intramedullary pin of claim 21, wherein each of the first, second, third and fourth proximal bores are configured to receive a bone screw therethrough.

27. An intramedullary pin for insertion into a medullary cavity, comprising:

an elongated shaft extending from a proximal end to a distal end along a central longitudinal axis, the shaft including a proximal section extending from the proximal end to a first end and a distal section extending from the first end to the distal end;

a first proximal bore extending through the proximal section along a first bore axis; and

a second proximal bore extending through the proximal section along a second bore axis, wherein the first bore intersects the second bore such that at least a portion of the first bore is open to the second bore;

wherein the distal section includes a plurality of angled faces distributed substantially evenly thereabout to define an outer profile thereof.

28. The intramedullary pin of claim 27, wherein a cross-sectional shape of the distal section is one of triangular and square.

29. The intramedullary pin of claim 27, wherein the angled faces are concave.

30. The intramedullary pin of claim 27, wherein the proximal section is curved and the distal section is substantially straight.

31. The intramedullary pin of claim 27, wherein the first bore intersects the second bore along an outer wall of the proximal section.

32. The intramedullary pin of claim 27, further comprising a third proximal bore extending through the proximal section along a third bore axis, wherein the third proximal bore extends parallel to the second bore.

33. The intramedullary pin of claim 32, further comprising a fourth proximal bore extending through the proximal section along a fourth bore axis, the fourth proximal bore having a substantially oval cross-section.

34. The intramedullary pin of claim 27, further comprising first, second and third transverse distal bores extending through the distal section, a first distal bore axis of the first distal bore extending substantially parallel to a second distal bore axis of the second distal bore and a third distal bore axis of the third distal bore being angularly offset from the first and second distal bore axes.

35. The intramedullary pin of claim 27, wherein the proximal end includes a lateral bevel.