Expandable system for repair of bone fractures

Patent metadata

Field	Value
Publication number	US-2025082376-A1
Application number	US-202318540271-A
Country	US
Kind code	A1
Filing date	Dec 14, 2023
Priority date	Sep 7, 2023
Publication date	Mar 13, 2025
Grant date	—

Abstract

A system for percutaneous fixation and stabilization of a fracture with a spanning, expandable structural frame placed in the intramedullary canal of the bone comprising an expandable medical device.

First claim

1 . An expandable device for treating a fracture site in a fractured bone having an intramedullary canal; said expandable device includes an expandable frame that is configured to be inserted into the intramedullary canal of a fractured bone; said expandable frame has an unexpanded shape and size that enables said expandable frame to be inserted into the intramedullary canal; said expandable frame has an expanded shape and size that enables said expandable frame to be secured in the intramedullary canal while traversing a fracture site of the fractured bone; said expandable frame has a longitudinal length that is sufficient to fully span the fracture site; said expandable frame is expandable from a first cross-sectional size in said unexpanded state to a second cross-sectional size in said expanded state; a cross-sectional area of said expandable frame in said second cross-sectional size is larger than a cross-sectional area of said expandable frame in said first cross-sectional size; said longitudinal length of said expandable frame in said unexpanded state is greater than said longitudinal length of said expandable frame in said expanded state; said expandable frame has a side wall that includes a plurality of openings; at least 50 wt. % of said expandable frame is formed of metal alloy that includes at least 5 awt. % rhenium and additive material; said additive material includes one or more metals that are selected from the group consisting of aluminum, boron, beryllium, bismuth, cadmium, calcium, cerium, chromium, cobalt, copper, gallium, gold, hafnium, iridium, iron, lanthanum, lithium, magnesium, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rare earth metals, rhodium, ruthenium, scandium, silver, silicon, tantalum, technetium, tin, titanium, tungsten, vanadium, yttrium, zinc, and zirconium; said rhenium and said additive material constitutes at least 90 wt. % of said metal alloy.

2 . The expandable device as defined in claim 1 , wherein said rhenium alloy includes 0-2 wt. % of a combination of other metals, carbon, oxygen, phosphorous, sulfur, hydrogen and nitrogen; said other metals are metals other than said rhenium and said additive material.

3 . The expandable device as defined in claim 1 , wherein said expandable frame is at least partially coated with a biocompatible material; said biocompatible material includes a) biological agent, b) titanium nitride oxide (TiNOx) coating, c) titanium nitride (TiN) coating, d) chromium nitride (CrN) coating, e) diamond-like carbon (DLC) coating, f) zirconium nitride (ZrN) coating, g) zirconium oxide (ZrO2) coating, h) zirconium-nitrogen-carbon (ZrNC) coating, i) zirconium OxyCarbide (ZrOC) coating, and/or j) zirconium oxynitride (ZrNxOy) coating.

4 . The expandable device as defined in claim 2 , wherein said expandable frame is at least partially coated with a biocompatible material; said biocompatible material includes a) biological agent, b) titanium nitride oxide (TiNOx) coating, c) titanium nitride (TiN) coating, d) chromium nitride (CrN) coating, e) diamond-like carbon (DLC) coating, f) zirconium nitride (ZrN) coating, g) zirconium oxide (ZrO2) coating, h) zirconium-nitrogen-carbon (ZrNC) coating, i) zirconium OxyCarbide (ZrOC) coating, and/or j) zirconium oxynitride (ZrNxOy) coating.

5 . The expandable device as defined in claim 1 , wherein said expandable frame is at least partially coated with a biocompatible material; said biocompatible material includes a) biological agent, b) titanium nitride oxide (TiNOx) coating, and/or c) zirconium oxynitride (ZrNxOy) coating.

6 . The expandable device as defined in claim 2 , wherein said expandable frame is at least partially coated with a biocompatible material; said biocompatible material includes a) biological agent, b) titanium nitride oxide (TiNOx) coating, and/or c) zirconium oxynitride (ZrNxOy) coating.

7 . The expandable device as defined in claim 5 , wherein said biocompatible material includes a) TiNOx coating and/or b) zirconium oxynitride (ZrNxOy) coating.

8 . The expandable device as defined in claim 6 , wherein said biocompatible material includes a) TiNOx coating and/or b) zirconium oxynitride (ZrNxOy) coating.

9 . The expandable device as defined in claim 1 , wherein said expandable frame has a generally hollow tubular shape.

10 . The expandable device as defined in claim 2 , wherein said expandable frame has a generally hollow tubular shape.

11 . A method for repairing a bone that is fractured comprising:
providing a fractured bone that includes first and second bone portions and a fracture site that is located between said first and second bone portions; said fracture site has a fracture site width; each of said first and second bone portions of said fractured bone includes an intramedullary canal; providing an expandable device; said expandable device includes an expandable frame; said expandable frame has an unexpanded shape and size that enables said expandable frame to be inserted into the intramedullary canal; said expandable frame has an expanded shape and size that enables said expandable frame to be secured in the intramedullary canal while traversing a fracture site of the fractured bone; said expandable frame has a longitudinal length that is sufficient to fully span said fracture site; said expandable frame is expandable from a first cross-sectional size in said unexpanded state to a second cross-sectional size in said expanded state; a cross-sectional area of said expandable frame in said second cross-sectional size is larger than a cross-sectional area of said expandable frame in said first cross-sectional size; said longitudinal length of said expandable frame in said unexpanded state is greater than said longitudinal length of said expandable frame in said expanded state; said expandable frame has a side wall that includes a one or more openings; said expandable frame is at least partially formed of metal alloy that includes at least 5 awt. % rhenium and additive material; said additive material includes one or more metals that are selected from the group consisting of aluminum, boron, beryllium, bismuth, cadmium, calcium, cerium, chromium, cobalt, copper, gallium, gold, hafnium, iridium, iron, lanthanum, lithium, magnesium, manganese, molybdenum, nickel, niobium, osmium, palladium, platinum, rare earth metals, rhodium, ruthenium, scandium, silver, silicon, tantalum, technetium, tin, titanium, tungsten, vanadium, yttrium, zinc, and zirconium; said rhenium and said additive material constitutes at least 90 wt. % of said rhenium alloy; inserting said expandable device in said intramedullary canal while said expandable device is in said unexpanded state such that at least a portion of said expandable device is positioned in said first and second bone portions and traverses said fracture site; and expanding said expandable device in said intramedullary canal to said expanded state to cause said longitudinal length of said first expandable device to shorten and to cause said first expandable device to at least partially repair said fractured bone; and wherein expansion of said expandable device causes said first and second bone portions to thereby cause a reduction in said fracture site width.

12 . The method as defined in claim 11 , wherein said expandable device includes a proximal portion, a distal portion and a mid-portion; and wherein said step of expanding includes expanding said proximal portion and/or a distal portion of said expandable device prior to expanding said mid-portion; and wherein prior expansion of said proximal portion and/or a distal portion causes said proximal portion and/or a distal portion to be at least partially anc

Assignees

• Mirus Llc

Inventors

• Yadav Jay

Classifications

• A61B17/7291

  for small bones, e.g. in the foot, ankle, hand or wrist · CPC title

• A61B17/7275 Primary

  with expanding cylindrical parts · CPC title

• A61B2017/00004

  (bio)absorbable, (bio)resorbable or resorptive · CPC title

• A61L31/022

  Metals or alloys · CPC title

• A61L31/148

  Materials at least partially resorbable by the body · CPC title