Process and apparatus for the mixing and direct emplacement of a two-component bone cement
AssigneeTecres S.P.A.
InventorsGiovanni Faccioli, Renzo Soffiatti
Life of this patent
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Abstract
A process and apparatus is disclosed for the mixing and direct emplacement of a bone cement formed from two components, one liquid and one powder, comprising the steps of storing the two components separately in a multichamber container, opening the liquid phase container within one of the said chambers which is not in communication with the outside atmosphere, setting up a negative pressure within the chamber containing the powder phase, causing aspiration of the liquid into the chamber containing the powder, mixing the two phases, compacting the paste obtained, injecting the paste into a cannula and extruding the paste with direct emplacement of the cement.
Claims18
A process for mixing a bone cement formed from two components, one liquid and one powder, the components being separate until the cement is required for use, each component comprising a mixture of mutually compatible components, the process comprising:
- separately storing the liquid and powder components to be mixed within a container having a plurality of chambers aseptically isolated from atmosphere;
- opening the container for the liquid component located within one of the chambers;
- creating a negative pressure in the chamber containing the powder component, the negative pressure causing suction of the liquid component into the chamber containing the powder component, the two chambers being kept isolated from outside atmosphere;
- mixing the two components by agitation of the container;
- compacting the bone cement obtained by compression;
- and
- extruding the cement for direct in situ emplacement of the cement.
Apparatus for holding and mixing cement components comprising:
- a body having a longitudinal axis, a base and a hollow cylindrical needle projecting outwardly from the base;
- a cover attachable to the body, the cover having an aperture which is coaxial with the longitudinal axis of the body;
- a plunger capable of recipricable axial movement in the aperture and the body, the plunger having a stem and a head which, with the body, defines a chamber for a aseptically housing a powder component of the cement, the plunger further having a cavity therein for housing a container containing a liquid component of the cement;
- a sealing plug for attachment to the needle;
- means for breaking the container when located in the cavity;
- a plurality of holes between the cavity and the chamber to permit the powder component and the liquid component to be placed in mutual communication after the container has been broken;
- and
- a filter located on the head of the plunger.
Dependencies are inferred from the claim text.