US 7,001,395 B2Granted

Medullary plug including an external shield and an internal valve

OwnerMohammed A. Hajianpourinventor

Life of this patent

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Abstract

A plug for stopping the flow of bone cement in a channel within bone includes an elastomeric inflatable structure protected from bone fragments and sharp edges by a shield extending around the inflatable structure. The shield may be formed as two or more coaxial structures having flexible members extending between opposite ends, with flexible members from an inner such structure curving outward to lie between adjacent flexible members from an outer such structure as the inflatable structure is inflated. The core is also removably connected to an insertion tool, with passageways in the insertion tool and in the core being used to insert a fluid into the inflatable structure. A valve extends as a sleeve around the core, and over the passageway, allowing fluid to flow into the inflatable structure, but preventing it from flowing out of the inflatable structure.

Claims20

Dependent claims

Apparatus for plugging a channel within a bone to stop a flow of bone cement through said channel, wherein said apparatus comprises:

an inflatable structure;
an insertion tool including a channel for filling said inflatable structure with a fluid;
a core removably attaching said insertion tool to said inflatable structure;
a shield including a plurality of coaxial shield structures, each extending outwardly around and along said inflatable structure, wherein each of said coaxial shield structures includes a distal end portion, a proximal end portion and a number of flexible beam portions extending longitudinally along said inflatable structure between said distal end portion and said proximal end portion, wherein said flexible beam portions of said coaxial shield structures curve outwardly with inflation of said inflatable structure, with central portions of said flexible beam portions within each of said coaxial shield structures separating from one another, and with said central portions of said flexible beam portions of one of said coaxial shield structures extending outward between adjacent central portions of said flexible beam portions of another of said coaxial shield structures, wherein said shield is substantially more resistant to damage from sharp objects than said inflatable structure, wherein said elongated insertion tool is removably connected to said core, and wherein said elongated insertion tool includes a tool passageway for said fluid injected into said core passageway.

1 more element

Apparatus for plugging a channel within a bone to stop a flow of bone cement through said channel, wherein

said apparatus comprises a bone plug, insertable within said channel, and an elongated insertion tool,
said bone plug includes an inflatable structure, a core attached to said inflatable structure, a shield including a plurality of coaxial shield structures, each extending outwardly around and along said inflatable structure, and a valve admitting a fluid into said inflatable structure and preventing a flow of fluid from said inflatable structure,
said core includes a core passageway for said fluid injected into said inflatable structure,
each of said coaxial shield structures includes a distal end portion, a proximal end portion and a number of flexible beam portions extending longitudinally along said inflatable structure between said distal end portion and said proximal end portion,
said flexible beam portions of said coaxial shield structures curve outwardly with inflation of said inflatable structure, with central portions of said flexible beam portions within each of said coaxial shield structures separating from one another, and with said central portions of said flexible beam portions of one of said coaxial shield structures extending outward between adjacent central portions of said flexible beam portions of another of said coaxial shield structures,
said shield is substantially more resistant to damage from sharp objects than said inflatable structure,
said elongated insertion tool is removably connected to said core, and
said elongated insertion tool includes a tool passageway for said fluid injected into said core passageway.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 10/300,260Filed 20 Nov 2002 · continuation in part
Priority: 8 Jun 2000
Published: US 2003/0097136 A122 May 2003
Granted: 21 Feb 2006
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

A61F 2/30723
Accessories: plugs or restrictors for sealing a cement-receiving space
A61F 2/4614
For insertion or extraction of endoprosthetic joints or of accessories thereof: of plugs for sealing a cement-receiving space
A61B 90/39
Instruments, implements or accessories specially adapted for surgery or diagnosis and not covered by any of the groups A61B1/00 - A61B50/00,…
A61F 2/3676
Femoral shafts: distal or diaphyseal parts of shafts