US 5,586,821 A · Bone cement preparation kit

Abstract

A preassembled collection of disposable mixing apparatus and constituent components needed for the vacuum mixing and preparation of bone cement and packaged as a single disposable kit is disclosed. The kit includes a contoured storage tray, ampules of liquid cement monomer, packets of powder cement copolymer, a small portable vacuum pump, connecting tubing with a vacuum indicator, a mixing cartridge, a cartridge cap and agitator, an assortment of connectable cement nozzles, and a funnel attachment. The kit can be packaged as a single unit for convenient and efficient use in the sterile environment of an operating room. The disposable telescoping mixing cartridge of the kit employs a telescoping mixing cartridge with a vacuum release mechanism.

Claims16

Dependent claims

An apparatus for manufacturing bone cement by mixing a plurality of constituent components comprising:

a telecsoping cartridge including a tubular outer cylinder having an open proximal end and a distal end, and a tubular inner cylinder having an open proximal end and a distal end shiftably received within said outer cylinder distal end, said inner cylinder being axially extensible between an extended position, an intermediate position, and a retracted position,
a cap connectable to said outer cylinder proximal end, said cap part including means for connecting said cartridge to a vacuum pump to draw a vacuum within said cartridge when said inner cylinder is in its said extended position,
an end plug, shiftably disposed within said inner cylinder for axial movement within said inner cylinder towards said cap to expel said cement from said cartridge,
and means for releasing vacuum pressure within said cartridge when said inner cylinder is in its said intermediate position.

1 more element

A collection of disposable apparatus and materials for manufacturing bone cement by mixing a plurality of constituent components comprising:

constituent components of said bone cement,
a disposable mixing cartridge for mixing said constituent components therein, a disposable vacuum pump connectable to said cartridge for drawing a vacuum within said cartridge when said liquid and solid constituent components are mixed and a disposable tray for supporting said liquid and solid constituent components packets, said mixing cartridge, and said vacuum pump to facilitate convenient mixing of cement,
said cartridge includes a tubular outer cylinder having an open proximal end and a distal end, and a tubular inner cylinder having an open proximal end shiftably received within said outer cylinder distal end, said inner cylinder being axially extensible between an extended position, an intermediate position, and a retracted position,
a cap connectable to said outer cylinder proximal end, said cap part including means for connecting said cartridge to a vacuum pump to draw a vacuum within said cartridge when said inner cylinder is in its extended position, an end plug, shiftably disposed within said inner cylinder for axial movement within said inner cylinder towards said end to expel said cement from said cartridge, means for releasing vacuum pressure within said cartridge when said inner cylinder is in its said intermediate position.

1 more element

Dependencies are inferred from the claim text.

Bone cement preparation kit

Life of this patent

Bone cement preparation kit

Life of this patent

Abstract

Claims16