US 11,633,287 B2Granted

Percutaneous implantable nuclear prosthesis

AssigneeSpinal Stabilization Technologies LLC

InventorsNadi S. Hibri, W. Loren Francis, Mark A. Novotny

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Abstract

A prosthesis for implantation in a de-nucleated intervertebral disc includes a fiber ring-like layer which encloses a polymeric layer to create an annular space. The annular space is inflatable with an in-situ curable liquid polymer and forms an interior cavity. The annular space may be expanded uniformly or differentially to be tailored to the needs of a particular vertebral segment and to achieve optimal disc space width and angle, thereby stabilizing the segment while preserving normal motion of the vertebral segment. The interior cavity provides a void that allows inward deformation of the implant during weight bearing activities and bending. The prosthesis can be elastically deformed through axial elongation to a reduced profile to load into a delivery cannula using pulling techniques.

Claims20

Dependent claims

An implantable prosthetic device comprising:

an annular hollow inflatable membrane having an inflation port to receive a flowable, curable material, the annular inflatable membrane comprising a unitary, elastomeric member;
a fiber graft enclosing the inflatable membrane, wherein the fiber graft has a tubular shape and defines a hollow cavity when the annular hollow inflatable membrane is inflated;
an inflation stem coupled to the inflation port for removably receiving an inflation stylet in a substantially leakproof manner, wherein the inflation stem is configured to expand responsive to receiving the inflation stylet and to collapse after removal of the inflation stylet;
and
a one way valve assembly in the inflation stem to allow the flowable, curable material to be injected into the interior of the inflatable membrane, the one way valve assembly comprising a duckbill valve, wherein when the inflation stem is collapsed, the inflation stem is configured to prevent the duckbill valve from inverting due to a pressure of the flowable, curable material in the annular hollow inflatable membrane.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/034,103Filed 28 Sep 2020 · continuation
Priority: 4 Nov 2014
Published: US 2021/0077266 A118 Mar 2021
Granted: 25 Apr 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

A61F 2/441
For the spine, e.g. vertebrae or spinal discs: made of inflatable pockets or chambers filled with fluid, e.g. with hydrogel
A61F 2/442
For the spine, e.g. vertebrae or spinal discs: intervertebral or spinal discs, e.g. resilient
A61F 2/4611
For insertion or extraction of endoprosthetic joints or of accessories thereof: of spinal prostheses
A61F 2/3094
Joints: designing or manufacturing processes

Family

Application62/074,873Us provisional application · filed 4 Nov 2014
Application14/932,366Parent of this continuation · filed 4 Nov 2015
US 2021/0077266 A1Pre-grant publication · published 18 Mar 2021
US 10,786,360 B2Parent of this continuation
US 11,523,914 B2Related patent
US 2016/0120654 A1Published application
US 11,633,287 B2This patent

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