Systems and methods for intramedullary nail implantation

Patent metadata

Field	Value
Publication number	US-10251691-B2
Application number	US-201715423773-A
Country	US
Kind code	B2
Filing date	Feb 3, 2017
Priority date	Sep 22, 2016
Publication date	Apr 9, 2019
Grant date	Apr 9, 2019

Abstract

Intramedullary nails, systems, and methods. The intramedullary nail may include a generally elongate body extending from a first, distal end to a second, proximal end. The distal end may include one or more openings configured to receive one or more bone anchors that extend transversely through the distal end intramedullary nail, and thereby configured to secure the distal end of the nail. The proximal end may also include one or more openings configured to receive one or more bone anchors that extend transversely through the proximal end of the intramedullary nail, and thereby configured to secure the proximal end of the nail.

First claim

What is claimed is:

1. A connection assembly for interconnecting an intramedullary nail and insertion tool, the intramedullary nail extending between a proximal end and a distal end and having a circumferential slot defined within the proximal end, and the insertion tool including an aiming arm with a hole defined therein, the connection assembly comprising:
an alignment tip having a hollow body extending from a proximal end to a distal end, the proximal end configured to be securely connected within the hole of the aiming arm;
an expanding collet having a hollow body extending from a collet proximal end to a collet distal end, the collet distal end having a radially outwardly extending collar and internal threads, the collet body defining axial slots extending from the distal end of the body which allow the distal end of the body to compress radially inwardly, thereby allowing the collar to pass through the alignment tip through passage and into the circumferential slot of the intramedullary nail; and
a connecting bolt having a threaded shaft, the connecting bolt extending through the hole in the aiming arm and into threaded engagement with the internal threads of the expanding collet such that the collar is push outwardly to its major diameter.

2. The connection assembly of claim 1 , wherein the proximal end of the tip hollow body is configured to be received into the hole of the aiming arm with a press fit.

3. The connection assembly of claim 1 , wherein the distal end of the tip hollow body has a recessed portion configured to be received into an opening in the proximal end of the intramedullary nail.

4. The connection assembly of claim 1 , wherein the connection bolt includes a head which makes contact with the proximal end of the alignment tip hollow body and causes compression across the intramedullary nail.

5. The connection assembly of claim 1 , wherein the alignment tip includes a recessed portion configured to be received in the proximal end of the intramedullary nail.

6. The connection assembly of claim 1 , wherein the alignment tip includes an internal shoulder extending radially therefrom configured to engage the aiming arm.

7. The connection assembly of claim 6 , wherein the expanding collet includes an external shoulder configured to contact the internal shoulder on the alignment tip.

8. A connection assembly for interconnecting an intramedullary nail and insertion tool, the intramedullary nail extending between a proximal end and a distal end and having a circumferential slot defined within the proximal end, and the insertion tool including an aiming arm with a hole defined therein, the connection assembly comprising:
an alignment tip having a hollow body extending from a proximal end to a distal end, the proximal end configured to be securely connected within the hole of the aiming arm;
an expanding collet having a hollow body extending from a collet proximal end to a collet distal end, the collet distal end having a radially outwardly extending collar; and
a connecting bolt extending through the hole in the aiming arm and into the expanding collet in order to expand the collar outwardly, thereby allowing the collar to engage the circumferential slot of the intramedullary nail.

9. The connection assembly of claim 8 , wherein the collet distal end includes an internal threaded portion.

10. The connection assembly of claim 9 , wherein the connecting bolt includes an external threaded portion, and the external threaded portion is configured to engage the internal threaded portion of the collet in order to expand the collet.

11. The connection assembly of claim 8 , wherein the collet includes a plurality of axial slots configured to allow the collet to compress and expand.

12. The connection assembly of claim 8 , wherein the proximal end of the tip hollow body is configured to be received into the hole of the aiming arm with a press fit.

13. The connection assembly of claim 8 , wherein the distal end of the tip hollow body has a recessed portion configured to be received into an opening in the proximal end of the intramedullary nail.

14. The connection assembly of claim 8 , wherein the connection bolt includes a head which makes contact with the proximal end of the alignment tip hollow body and causes compression across the intramedullary nail.

15. The connection assembly of claim 8 , wherein the alignment tip includes a recessed portion configured to be received in the proximal end of the intramedullary nail.

16. The connection assembly of claim 8 , wherein the alignment tip includes an internal shoulder extending radially therefrom configured to engage the aiming arm.

17. The connection assembly of claim 16 , wherein the expanding collet includes an external shoulder configured to contact the internal shoulder on the alignment tip.

18. An assembly comprising:
an intramedullary nail extending between a proximal end and a distal end and having an opening with a circumferential slot defined within the proximal end;
an insertion tool including an aiming arm with a hole defined therethrough; and
a connection assembly comprising:
an alignment tip having a hollow body extending from a proximal end to a distal end, the proximal end configured to be securely connected within the hole of the aiming arm;
an expanding collet having a hollow body extending from a collet proximal end to a collet distal end, the collet distal end having a radially outwardly extending collar; and
a connecting bolt extending through the hole in the aiming arm and into the expanding collet in order to expand the collar outwardly, thereby allowing the collar to engage the circumferential slot of the intramedullary nail.

Assignees

• Globus Medical Inc

Inventors

• Hedgeland Mark
• Machamer David
• Jansen David R
• Rossney Mark
• Rowe David J
• Laird David

Classifications

• A61B17/1742

  for the hip · CPC title

• A61B17/744

  the longitudinal elements coupled to an intramedullary nail · CPC title

• A61B17/7283

  with special cross-section of the nail · CPC title

• A61B17/72

  Intramedullary devices, e.g. pins or nails · CPC title

• A61B17/1668

  for the upper femur (A61B17/164 takes precedence) · CPC title