US 11,925,389 B2Granted

Spinal distraction system

AssigneeNuVasive Specialized Orthopedics, Inc.

InventorsArvin Chang, Scott Pool

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Abstract

A spinal distraction system, according to one aspect, includes an adjustable spinal distraction rod comprising first and second members, the adjustable spinal distraction rod configured for non-invasive elongation of the first and second members. The system includes an anchor rod configured for mounting to a bone of a subject, the anchor rod having one or more spring-biased tabs disposed at one end thereof, and a connector having first end and a second end, the first end having a receiving cup configured for detachable mounting on the anchor rod, wherein the one or more spring-biased tabs are configured to engage with an inner surface of the receiving cup, the connector having a second end operatively coupled to an end of a first member and wherein the second member is configured for mounting to a second bone of a subject.

Claims20

Dependent claims

An adjustable implant comprising:

an adjustable spinal distraction rod comprising:
an inner rod configured to be coupled to a first bone portion, wherein the inner rod includes at least one longitudinally extending channel formed within an interior surface of the inner rod and including an internal threads, and an externally splined tip at an end of the inner rod,
an outer rod configured to be coupled to a second bone portion, wherein the outer rod includes:
a housing containing a lead screw configured to engage with the internal threads and a magnet coupled to the lead screw, wherein the magnet is positioned proximate a first end of the housing and configured to rotate the lead screw within the housing, and at least one longitudinally extending channel formed in an interior surface of the housing,
wherein the splined tip configured to mate with the at least one longitudinally extending channel,
wherein the outer rod is configured to telescopically move relative to the inner rod, and wherein the magnet and the lead screw are configured to rotate about an axis of rotation that is substantially coaxial with a longitudinal axis of telescopic movement of the outer rod relative to the inner rod,
an anchor rod configured to be fixedly secured to a third bone portion;
and
a locking swivel joint releasably secured to the anchor rod at a first end and releasably secured to the adjustable spinal distraction rod at a second end, the locking swivel joint having:
a housing coupled with an end of one of the anchor rod and the adjustable spinal distraction rod;
a bushing positioned about a periphery of the other one of the anchor rod and the adjustable spinal distraction rod,
wherein the other one of the anchor rod and the adjustable spinal distraction rod, about which the bushing is positioned, terminates in a ball disposed within the housing of the locking swivel joint;
and
a locking nut mounted about the bushing and being moveable about the bushing between a locked configuration and an unlocked configuration,
wherein the locking swivel joint is configured to pivot the adjustable spinal distraction rod relative to the anchor rod in the unlocked configuration, and configured to mechanically lock a position of the adjustable spinal distraction rod relative to the anchor rod in the locked configuration;
and
wherein movement of the inner rod with respect to the outer tube is configured to treat a spinal deformity.

14 more elements

An adjustable implant comprising:

an adjustable spinal distraction rod comprising:
an inner rod configured to be coupled to a first bone portion;
an outer rod configured to be coupled to a second bone portion and configured to telescopically move relative to the inner rod,
wherein one of the inner rod or outer rod includes at least one longitudinally extending channel formed within an interior surface thereof and including an internal threads, and an externally splined tip at an end of the inner rod,
wherein the other one of the inner rod or outer rod includes:
a housing containing a lead screw configured to engage with the internal threads and a magnet coupled to the lead screw, wherein the magnet is positioned proximate a first end of the housing and configured to rotate the lead screw within the housing, and at least one longitudinally extending channel formed in an interior surface of the housing,
wherein the splined tip configured to mate with the at least one longitudinally extending channel, and
wherein the magnet and the lead screw are configured to rotate about an axis of rotation that is substantially coaxial with a longitudinal axis of telescopic movement of the outer rod relative to the inner rod,
an anchor rod configured to be fixedly secured to a third bone portion;
and
a locking swivel joint releasably secured to the anchor rod at a first end and releasably secured to the adjustable spinal distraction rod at a second end, the locking swivel joint having:
a housing coupled with an end of one of the anchor rod and the adjustable spinal distraction rod;
a bushing positioned about a periphery of the other one of the anchor rod and the adjustable spinal distraction rod,
wherein the other one of the anchor rod and the adjustable spinal distraction rod, about which the bushing is positioned, terminates in a ball disposed within the housing of the locking swivel joint;
and
a locking nut mounted about the bushing and being moveable about the bushing between a locked configuration and an unlocked configuration,
wherein the locking swivel joint is configured to pivot the adjustable spinal distraction rod relative to the anchor rod in the unlocked configuration, and configured to mechanically lock a position of the adjustable spinal distraction rod relative to the anchor rod in the locked configuration;
and
wherein movement of the inner rod with respect to the outer tube is configured to treat a spinal deformity.

16 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/646,163Filed 28 Dec 2021 · continuation
Priority: 13 Oct 2008
Published: US 2022/0192709 A123 Jun 2022
Granted: 12 Mar 2024
Term ends: Not estimatedThe source records don’t support an estimate.

Classification61 codes

A61B 17/7002
Screws or hooks combined with longitudinal elements which do not contact vertebrae: longitudinal elements, e.g. rods
A61B 17/7004
Longitudinal elements, e.g. rods: with a cross-section which varies along its length
A61B 17/7016
With means for adjusting the distance between two screws or hooks: electric or electromagnetic means
A61B 17/7023
Longitudinal elements having flexible parts, or parts connected together, such that after implantation the elements can move relative to each…

Family

Application12/250,454Parent of this continuation · filed 13 Oct 2008
Application13/730,773Parent of this continuation · filed 28 Dec 2012
US 2022/0192709 A1Pre-grant publication · published 23 Jun 2022
US 11,241,257 B2Parent of this continuation
US 2010/0094303 A1Published application
US 2014/0031870 A1Published application
US 11,925,389 B2This patent

From the US filing history. Foreign family members aren’t listed.