Conversion kit for an external fixation system

Patent metadata

Field	Value
Publication number	US-12396756-B2
Application number	US-202117911001-A
Country	US
Kind code	B2
Filing date	Apr 12, 2021
Priority date	Apr 15, 2020
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A kit and corresponding methods of use are disclosed. In use, the kit includes a plurality of articulating clamps for coupling to one of the rings of an external fixation system. In use, the clamps include a body portion having a stem arranged and configured to be received within an opening formed in one of the rings. The clamp further including a clamp assembly for engaging a rod spanning the first and second rings. Thus arranged, the clamp may be directly coupled to one of the rings and the rod, the clamp enabling the position of the ring to be adjusted relative to the rod. As such, the clamps may enable, inter alia, a hexapod external fixation system to be converted into a static frame, a static frame to be constructed in a more efficient manner, and/or creation of an enlarged visualization or working window.

First claim

What is claimed is:

1. A kit for use with an external fixation system to one of facilitate conversion of the external fixation system into a static frame, enable temporary removal of one or more struts from the external fixation system to provide a larger visualization or working window, or enable construction of a static frame, the kit comprising:
first and second rings arranged and configured to be coupled to a patient's bone, the first and second rings being arranged and configured to be coupled to each other via a plurality of external adjustable length struts, each of the first and second rings including a plurality of openings formed therein;
one or more rods arranged and configured to span between the first and second rings; and
one or more articulating clamps arranged and configured to couple one of the one or more rods to one of the first and second rings;
wherein each of the one or more articulating clamps include a stem arranged and configured to be received within one of the openings formed in one of the first and second rings; and
wherein each of the one or more articulating clamps are arranged and configured to engage the rod spanning between the first and second rings via a snap-fit or friction fit connection; at least one of the one or more articulating clamps includes a body portion and a clamp portion, the body portion including the stem arranged and configured to be received within the opening formed in one of the first and second rings, the clamp portion arranged and configured to engage the rod spanning the first and second rings, the clamp portion includes first and second jaw members in facing arrangement, the first and second jaw members arranged and configured to receive the rod spanning the first and second rings, and the clamp further includes a bolt including an externally threaded rod and an enlarged spherical head portion, the bolt arranged and configured to couple the clamp portion to the body portion while enabling the clamp portion to articulate relative to the body portion.

2. The kit according to claim 1 , wherein the clamp portion is arranged and configured to move relative to the body portion to enable a position of the connected ring to be adjusted relative to the rod spanning the first and second rings.

3. The kit according to claim 1 , wherein the stem includes an externally threaded post arranged and configured to receive a threaded nut.

4. The kit according to claim 1 , wherein the body portion includes a bore arranged and configured to at least partially receive the enlarged spherical head portion.

5. The kit according to claim 1 , wherein the clamp further comprises a threaded nut, the externally threaded rod of the bolt passing through the first and second jaw members so that engagement of the threaded nut with the externally threaded rod of the bolt secures a position of the rod spanning between the first and second rings between the first and second jaw members.

6. The kit according to claim 1 , wherein the clamp further comprises a set screw arranged and configured to interact with the enlarged spherical head portion so that tightening of the set screw fixes a position of the clamp portion relative to the body portion.

7. The kit according to claim 1 , wherein the first and second jaw members are biased apart from each other via a spring disposed between the first and second jaw members.

8. The kit according to claim 1 , wherein the clamp portion includes a hinged clamp assembly arranged and configured to engage the rod spanning the first and second rings, the hinged clamp assembly including first and second arms hingeably coupled to each other.

9. The kit according to claim 1 , wherein the one or more articulating clamps include first and second articulating clamps, the first articulating clamp coupling a first end of the rod spanning between the first and second rings to the first ring, the second articulating clamp coupling a second end of the rod spanning between the first and second rings to the second ring.

10. The kit according to claim 1 , wherein the one or more articulating clamps include a first articulating clamp coupling a first end of the rod spanning between the first and second rings to the first ring, a second end of the rod spanning between the first and second rings being coupled o the second ring via one or more threaded nuts.

11. The kit according to claim 1 , further comprising one or more dynamization washers arranged and configured to be positioned between one of the one or more articulating clamps and one of the first and second rings, the dynamization washer arranged and configured to enable micro-motion of the clamp to the ring.

12. The kit according to claim 11 , wherein the one or more dynamization washers include an opening passing therethrough arranged and configured to enable the stem of the articulating clamp to pass therethrough, the dynamization washer including a containment cup and a damper, the containment cup including an outer ledge defining a pocket for receiving at least a portion of the damper therein, the damper being arranged and configured to compress to enable micro-motion of the articulating clamp relative to the ring.

13. A kit for use with an external fixation system to one of facilitate conversion of the external fixation system into a static frame, enable temporary removal of one or more struts from the external fixation system to provide a larger visualization or working window, or enable construction of a static frame, the kit comprising:
first and second rings arranged and configured to be coupled to a patient's bone, the first and second rings being arranged and configured to be coupled to each other via a plurality of external adjustable length struts, each of the first and second rings including a plurality of openings formed therein;
one or more rods arranged and configured to span between the first and second rings; and
one or more articulating clamps arranged and configured to couple one of the one or more rods to one of the first and second rings;
wherein each of the one or more articulating clamps include a stem arranged and configured to be received within one of the openings formed in one of the first and second rings; and
wherein each of the one or more articulating clamps are arranged and configured to engage the rod spanning between the first and second rings via a snap-fit or friction fit connection, at least one of the one or more articulating clamps includes a body portion and a clamp portion, the body portion including the stem arranged and configured to be received within the opening formed in one of the first and second rings, the clamp portion arranged and configured to engage the rod spanning the first and second rings, the clamp portion includes first and second jaw members in facing arrangement, the first and second jaw members arranged and configured to receive the rod spanning the first and second rings, and
wherein the first and second jaw members are biased apart from each other via a spring disposed between the first and second jaw members.

14. The kit according to claim 13 , wherein the clamp portion is arranged and configured to move relative to the body portion to enable a position of the connected ring to be adjusted relative to the rod spanning the first and second rings.

15. The kit according to claim 13 , wherein the stem includes an externally threaded post arranged and configured to receive a threaded nut.

16. The kit according to claim 13 , wherein the clamp further includes a bolt including an externally threaded rod and an enlarged spherical head portion, the bod

Assignees

• Smith & Nephew Inc
• Smith & Nephew Orthopaedics Ag
• Smith & Nephew Asia Pacific Pte Ltd

Inventors

• Noblett Andrew P
• Mason Johnny R
• Bell Paul

Classifications

• A61B17/6475 Primary

  the connecting rod being threaded · CPC title

• A61B17/645

  comprising a framework (A61B17/6425, A61B17/6441 take precedence) · CPC title

• A61B17/62 Primary

  Ring frames, i.e. devices extending around the bones to be positioned ({A61B17/6433} , A61B17/66 take precedence) · CPC title