Orthopedic extendable rods

Patent metadata

Field	Value
Publication number	US-12582447-B2
Application number	US-202218047866-A
Country	US
Kind code	B2
Filing date	Oct 19, 2022
Priority date	Oct 15, 2014
Publication date	Mar 24, 2026
Grant date	Mar 24, 2026

Abstract

Embodiments herein are generally directed to extendable rods for use in orthopedic assemblies. In some embodiments, these implants may be used in conjunction with procedures to treat spinal deformities, including, but not limited to, early onset scoliosis.

First claim

What is claimed is:

1 . An extendable rod assembly, comprising:
an elongate sleeve having a first end and a second end; a fixed rod attached to the elongate sleeve and extending in a second direction, an actuating rod at least partially disposed within the elongate sleeve and extending in a first direction, an annular space between the actuating rod and an interior surface of the elongate sleeve defining a first chamber, an interior space in the elongate sleeve between the fixed rod and the actuating rod defining a second chamber; and a valve assembly disposed within the elongate sleeve and adapted to automatically regulate a flow of fluid between the first and second chambers as the actuating rod grows wherein the valve assembly is adapted to regulate the flow in response to a change in fluid pressure between the two chambers wherein the valve assembly includes: an elongate valve body extending along a longitudinal axis of the elongate sleeve and slidably coupled to the actuating rod, the elongate valve body in communication with the second chamber a duct disposed in the actuating rod and in communication with the first chamber.

2 . The extendable rod assembly of claim 1 , wherein the elongate valve body includes a plurality of transverse conduits configured to be in selective communication with the duct of the actuating body to transfer fluid from the first chamber to the second chamber as the actuating rod grows.

3 . The extendable rod assembly of claim 1 , wherein the elongate valve body includes:
a plurality of longitudinally spaced circumferential grooves; and a plurality of transverse conduits disposed in the grooves and configured to be in selective communication with the duct of the actuating body to transfer fluid from the first chamber to the second chamber as the actuating rod grows.

4 . The extendable rod assembly of claim 1 , wherein the elongate valve body is attached to and extends from the fixed rod in the first direction.

5 . The extendable rod assembly of claim 1 , wherein the valve assembly includes a needle valve assembly disposed in the actuating rod.

6 . The extendable rod assembly of claim 1 , wherein the elongate sleeve includes:
a first end cap at the first end and a second end cap at the second end, wherein the first end cap has an opening to receive a portion of the actuating rod and the second end cap has an opening to receive a portion of the fixed rod.

7 . The extendable rod assembly of claim 6 , wherein the first end cap and the second end cap are threadingly connected to the elongate sleeve.

8 . The extendable rod assembly of claim 1 , wherein the valve assembly is adapted to regulate the flow in response to a change in fluid pressure between the two chambers.

9 . The extendable rod assembly of claim 1 , wherein the valve assembly includes:
an elongate valve body extending along a longitudinal axis of the elongate sleeve and slidably coupled to the actuating rod, the elongate valve body in communication with the second chamber; a duct disposed in the actuating rod and in communication with the first chamber.

10 . The extendable rod assembly of claim 9 , wherein the elongate valve body includes a plurality of transverse conduits configured to be in selective communication with the duct of the actuating body to transfer fluid from the first chamber to the second chamber as the actuating rod grows.

11 . The extendable rod assembly of claim 9 , wherein the elongate valve body includes:
a plurality of longitudinally spaced circumferential grooves; and a plurality of transverse conduits disposed in the grooves and configured to be in selective communication with the duct of the actuating body to transfer fluid from the first chamber to the second chamber as the actuating rod grows.

12 . The extendable rod assembly of claim 9 , wherein the elongate valve body is attached to and extends from the fixed rod in the first direction.

13 . An extendable rod assembly, comprising:
an elongate sleeve having a first end and a second end; a fixed rod attached to the elongate sleeve and extending in a second direction, an actuating rod at least partially disposed within the elongate sleeve and extending in a first direction, the actuating rod including a head and a rod extending from the head in the first direction, an annular space between the rod and an interior surface of the elongate sleeve defining a first chamber, an interior space in the elongate sleeve between the fixed rod and the actuating rod defining a second chamber, the head having a larger diameter than the rod and dividing the first chamber from the second chamber; and a valve assembly disposed within the elongate sleeve and adapted to automatically regulate a flow of fluid between the first and second chambers as the actuating rod grows, wherein the valve assembly includes a needle valve assembly disposed in the actuating rod.

14 . The extendable rod assembly of claim 13 , wherein the elongate sleeve includes:
a first end cap at the first end and a second end cap at the second end, wherein the first end cap has an opening to receive a portion of the actuating rod and the second end cap has an opening to receive a portion of the fixed rod.

15 . The extendable rod assembly of claim 14 , wherein the first end cap and the second end cap are threadingly connected to the elongate sleeve.

Assignees

• Globus Medical Inc

Inventors

• Lynch Bobby
• Faulhaber Kurt

Classifications

• A61B17/7017

  pneumatic or hydraulic means · CPC title

• A61B17/702

  having a core or insert, and a sleeve, whereby a screw or hook can move along the core or in the sleeve · CPC title

• A61B17/7025 Primary

  with a sliding joint · CPC title