Process and apparatus for the mixing and direct emplacement of a two-component bone cement
AssigneeTecres S.P.A.
InventorsGiovanni Faccioli, Soffiatti Renzo
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.
Claims15
A process for mixing a bone cement formed from two components, one liquid and one powder, which components are kept separate until the cement is required for use, each component comprising a mixture of one or more components which are mutually compatible, and if required, for delivering it directly in situ, such process comprising the following steps:
- separately storing the two components which are to be mixed, within a container comprising a plurality of chambers aseptically isolated from the outside atmosphere;
- opening the container for the liquid component within one of the aforesaid chambers which does not communicate with the outside atmosphere;
- creating a negative pressure in the chamber containing the powder component;
- said negative pressure causing suction of the liquid component into the chamber containing the powder component, the two chambers being kept isolated from the outside atmosphere.
- mixing the two components by agitation of the container;
- compacting the cement paste obtained by compressing same;
- inserting, if required, a flexible cannula so as to direct the outflow of paste;
- and
- extruding the paste by action on a plunger, causing direct in situ emplacement of the cement.
Apparatus for mixing a cement formed from two components, one liquid and one powder, the apparatus comprising:
- a substantially cylindrical body having a longitudinal axis, a cover having an aperture therein at one end of the body and an outwardly projecting hollow cylindrical needle at the other end of the body;
- a plunger having a stem axially movable through the aperture in the cove, the plunger having at one end a head, which, with the body, defines a chamber for housing the powder component, the stem including a cavity for housing a container containing the liquid component of the cement;
- a sealing plug for sealing the needle;
- means for breaking the container;
- at least one hole between the cavity and the chamber whereby the liquid component can move into the chamber and mix with the powder component;
- and a filter associated with each hole whereby only the liquid component is permitted to pass through the holes.
Dependencies are inferred from the claim text.