Bone cement mixing and delivery device for injection and method thereof

A bone cement mixing and delivery assembly for mixing a powdered copolymer and a liquid monomer to form a bone cement and delivering the bone cement, said assembly comprising:

• a cartridge having a distal end and a proximal end and defining a chamber between said distal end and said proximal end;
• a lid connected to said proximal end and having an aperture;
• a piston disposed in said chamber and presenting a face for transferring the bone cement from said chamber to said proximal end;
• a plunger moveable relative to said piston for extending from said piston and into said aperture for forcing the bone cement through said aperture;
• and
• a transfer mechanism connected to said distal end of said cartridge for moving said piston and said plunger in unison to a stop position that limits further movement of said piston and thereafter moves said plunger relative to said piston and into said aperture.

A method of delivering a bone cement from a cartridge having a distal end and a proximal end defining a chamber therebetween and an aperture in the proximal end, said method comprising the steps of:

• filing a chamber having a proximal end with the bone cement;
• advancing a piston and a plunger in unison within the chamber for transferring the bone cement out of an aperture in the proximal end of the chamber;
• and
• advancing the plunger independently of the piston to extend the plunger beyond the piston and into the aperture.

A bone cement mixing and delivery assembly for mixing a powdered copolymer with a liquid monomer to form a bone cement and delivering the bone cement, said device comprising:

• a cartridge having a distal end and a proximal end and defining a mixing chamber between said distal end and said proximal end;
• a lid connected to said proximal end and having an aperture;
• a removable handle extending through said aperture and having a first end and a second end defining a hollow cavity between said first end and said second end;
• a shaft disposed within said hollow cavity and extending from said first end of said removable handle;
• a mixing blade having a bore and said bore receiving said first end of said removable handle;
• and
• a quick-release connector between said mixing blade and said shaft such that said mixing blade is releasable from said removable handle.

A method of mixing a powdered copolymer and a liquid monomer to form a bone cement in a cartridge having a distal end and a proximal and defining a mixing chamber therebetween with a removable handle having a release button and a quick-release connector for attachment to a mixing blade and a lid having an aperture connected to the proximal end;

• said method comprising the steps of:
• disposing the powdered copolymer and the liquid monomer into the mixing chamber;
• connecting the lid to the proximal end to seal the mixing chamber having the mixing blade disposed within the mixing chamber;
• agitating the powdered copolymer and the liquid monomer with the mixing blade by manipulating the removable handle to form the bone cement;
• and
• actuating the release button and releasing the mixing blade from the quick-release connector such that the removable handle is removable through the aperture and the mixing blade remains in the mixing chamber.