Non-invasive adjustable distraction system
First Claim
1. A spinal distraction system comprising:
- a distraction rod having a first end configured for affixation to a subject'"'"'s spine at a first location and a second end containing a recess having a threaded portion disposed therein; and
an adjustable portion configured for affixation to a subject'"'"'s spine at a second location remote from the first location and comprising a housing coaxially containing at least a portion of a magnetic assembly affixed at one end thereof to a lead screw via a locking pin passing transversely through the lead screw and the magnetic assembly defining an interface between the magnetic assembly and the lead screw, the lead screw operatively coupled to the threaded portion of the distraction rod;
wherein upon a rotation of the lead screw and the magnetic assembly about a longitudinal axis, the lead screw is configured to communicate with the threaded portion of the distraction rod to move the distraction rod relative to the adjustable portion and change an axial length of the spinal distraction system, with the interface between the locking pin and the lead screw configured to allow the lead screw to pivot relative to the magnetic assembly, allowing the lead screw to align with the threaded portion and prevent jamming of the lead screw against the threaded portion.
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0 Petitions
Accused Products
Abstract
A spinal distraction system includes a distraction rod having a first end and a second end, the first end being configured for affixation to a subject'"'"'s spine at a first location, the distraction rod having a second end containing a recess having a threaded portion disposed therein. The system further includes an adjustable portion configured for affixation relative to the subject'"'"'s spine at a second location remote from the first location, the adjustable portion comprising a housing containing a magnetic assembly, the magnetic assembly affixed at one end thereof to a lead screw, the lead screw operatively coupled to the threaded portion. A locking pin may secure the lead screw to the magnetic assembly. An o-ring gland disposed on the end of the housing may form a dynamic seal with the distraction rod.
706 Citations
20 Claims
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1. A spinal distraction system comprising:
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a distraction rod having a first end configured for affixation to a subject'"'"'s spine at a first location and a second end containing a recess having a threaded portion disposed therein; and an adjustable portion configured for affixation to a subject'"'"'s spine at a second location remote from the first location and comprising a housing coaxially containing at least a portion of a magnetic assembly affixed at one end thereof to a lead screw via a locking pin passing transversely through the lead screw and the magnetic assembly defining an interface between the magnetic assembly and the lead screw, the lead screw operatively coupled to the threaded portion of the distraction rod; wherein upon a rotation of the lead screw and the magnetic assembly about a longitudinal axis, the lead screw is configured to communicate with the threaded portion of the distraction rod to move the distraction rod relative to the adjustable portion and change an axial length of the spinal distraction system, with the interface between the locking pin and the lead screw configured to allow the lead screw to pivot relative to the magnetic assembly, allowing the lead screw to align with the threaded portion and prevent jamming of the lead screw against the threaded portion. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A spinal distraction system comprising:
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a distraction rod having a first end configured for affixation to a subject'"'"'s spine at a first location and a second end containing a recess having a threaded portion disposed therein; an adjustable portion configured for affixation to a subject'"'"'s spine at a second location remote from the first location and comprising a housing coaxially containing at least a portion of a magnetic assembly affixed at one end thereof to a lead screw by an interface comprising a locking pin passing transversely through the lead screw and the magnetic assembly, the lead screw operatively coupled to the threaded portion of the distraction rod; and a recess disposed in an interior portion of the housing, the recess having at least one O-ring therein dimensioned to form a fluid tight seal between the housing and the distraction rod; wherein upon a rotation of the lead screw and the magnetic assembly about a longitudinal axis, the lead screw is configured to communicate with the threaded portion of the distraction rod to move the distraction rod relative to the adjustable portion and change an axial length of the spinal distraction system, with the interface between the magnetic assembly and the lead screw configured to allow the lead screw to pivot relative to the magnetic assembly, allowing the lead screw to align with the threaded portion and prevent jamming of the lead screw against the threaded portion. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification