Orthopedic compression device

Patent metadata

Field	Value
Publication number	US-2025177022-A1
Application number	US-202318527644-A
Country	US
Kind code	A1
Filing date	Dec 4, 2023
Priority date	Dec 4, 2023
Publication date	Jun 5, 2025
Grant date	—

Abstract

An orthopedic compression device comprises an outer shaft portion having a threaded outer distal end and having an inner cannulation extending from an opening in a proximal end towards an inner distal end, the inner cannulation having a proximal region; a head portion, the head portion having a distal end portion with a geometry keyed to the proximal region of the cannulation of the first shaft to allow rotation of the head portion to drive rotation of the outer shaft portion, the head portion including an inner channel; and an inner shaft portion. The inner shaft portion is formed from a superelastic material and has a stop at a proximal end thereof. The stop engages a stop surface formed within the head portion when the inner shaft portion extends through the inner channel. The inner shaft portion is coupled to the outer shaft portion such that the inner shaft portion elongates and is placed into tension upon separation of the head portion and outer shaft portion.

First claim

What is claimed is:

1 . An orthopedic compression device comprising:
an outer shaft portion having a threaded outer distal end and having an inner cannulation extending from an opening in a proximal end towards an inner distal end, the inner cannulation having a proximal region; a head portion, the head portion having a distal end portion with a geometry keyed to the proximal region of the cannulation of the first shaft to allow rotation of the head portion to drive rotation of the outer shaft portion, the head portion including an inner channel; and an inner shaft portion, the inner shaft portion formed from a superelastic material and having a stop at a proximal end thereof, the stop engaging a stop surface formed within the head portion, the inner shaft portion extending through the inner channel and coupled to the outer shaft portion; wherein the inner shaft portion elongates and is placed into tension upon separation of the head portion and outer shaft portion to thereby cause a compressive force between said head portion and said outer shaft portion upon said separation.

2 . The orthopedic compression device of claim 1 wherein the proximal end of the head includes a first driver interface configured to receive a corresponding first driver used to rotate said head portion and to cause driven rotation of the outer shaft portion.

3 . The orthopedic compression device of claim 2 wherein the first driver interface comprises a star driver slot.

4 . The orthopedic compression device of claim 1 wherein the inner shaft portion includes a thread disposed on a distal end thereof, the thread engaging a thread on the inner distal end of the outer shaft portion to cause coupling of the inner shaft portion and outer shaft portion.

5 . The orthopedic compression device of claim 1 wherein the head includes a threaded external surface.

6 . The orthopedic compression device of claim 5 , wherein threading on the head portion has a different thread pitch from the pitch of threading on the outer distal end of the outer shaft portion.

7 . The orthopedic compression device of claim 1 wherein the head includes an unthreaded bone-engaging external surface.

8 . A medical procedure kit comprising, within a container, the orthopedic compression device of claim 2 and a first driver, the first driver corresponding to said first driver interface.

9 . A medical procedure kit comprising, within a container, the orthopedic compression device of claim 2 and a second head portion, one of the head portion and the second head portion including a threaded external surface and the other including an unthreaded bone-engaging external surface.

10 . A method for assembling an orthopedic compression device, the method comprising:
providing an outer shaft portion having a threaded outer distal end and having an inner cannulation extending from an opening in a proximal end towards an inner distal end, the inner cannulation having a proximal region; a head portion, the head portion having a distal end portion with a geometry keyed to the proximal region of the cannulation of the first shaft to allow rotation of the head portion to drive rotation of the outer shaft portion, the head portion including a first driver interface, an inner channel, and an inner stop surface; and an inner shaft portion, the inner shaft portion formed from a superelastic material and having a stop at a proximal end thereof; passing a distal end of the inner shaft portion through the inner channel of the head until the stop of the inner shaft portion engages said stop surface; introducing a distal end of the inner shaft portion into the inner cannulation of the outer shaft portion through said opening in said proximal end; and coupling the inner shaft portion to the outer shaft portion, the distal end portion of the head portion at least partially disposed within the proximal region of the inner cannulation of the outer shaft portion.

11 . The method of claim 10 , wherein coupling the inner shaft portion to the outer shaft portion shaft includes engaging a driver with a second driver interface disposed at a proximal end of the inner shaft portion shaft and rotating the driver.

12 . The method of claim 11 , wherein the first driver interface comprises a star driver slot and the second driver interface comprises a Phillips driver slot.

13 . A method comprising providing the orthopedic compression device of claim 1 , driving said threaded distal end of said outer shaft into bone across a bone interface a sufficient distance to cause separation of said head portion and said outer shaft portion, whereby said inner shaft portion elongates and is placed under tension to cause a compressive force across said bone interface.

14 . A method according to claim 13 , further comprising increasing the compressive force by further advancing said inner shaft portion.

Assignees

• Medline Industries Lp

Inventors

• Niver Ryan

Classifications

• A61B2017/681

  Alignment, compression, or distraction mechanisms · CPC title

• A61B17/863 Primary

  with thread interrupted or changing its form along shank, other than constant taper · CPC title

• A61B2017/00867

  shape memory effect · CPC title

• A61B17/866

  Material or manufacture · CPC title

• A61B17/8685 Primary

  comprising multiple separate parts · CPC title