Method and device for preparation of bone cement

A - Human Necessities – 61 – F

Patent

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A61F 2/46 (2006.01)

Patent

CA 2449970

The present invention relates to a method and a device for preparation of bone cement. The constituent components of bone cement are mixed under vacuum in a closed mixing chamber, which has a vacuum connection (4), a moveable wall section (2), a device arranged to maintain the moveable wall section (2) in its initial position during the mixing process, an extrusion opening located opposite to the moveable wall section (2) and a device (9) arranged to openably seal the extrusion opening. The extrusion is performed by means of the moveable wall section (2) being brought to move towards the extrusion opening, by applying a force against the moveable wall section (2) by means of an extrusion tool (12). The present invention is characterized in that the moveable wall section (2) is set free after finished mixing and thereafter forced towards the extrusion opening for compression of bone cement while the extrusion opening is sealed by the sealing device (9).

La présente invention concerne une méthode et un dispositif de préparation de ciment osseux. Dans cette méthode, les composants du ciment osseux sont mélangés sous vide dans une chambre de mélange fermée, comprenant un raccord à vide (4), une section de paroi mobile (2), un dispositif conçu pour maintenir la section de paroi mobile (2) dans sa position initiale durant le processus de mélange, une ouverture d'extrusion située à l'opposé de la section de paroi mobile (2) et un dispositif (9) conçu pour obturer de façon étanche et non définitive l'ouverture d'extrusion. Pour procéder à l'extrusion, on applique une force contre la section de paroi mobile (2) au moyen d'un outil d'extrusion (12) pour déplacer la section de paroi mobile (2) vers l'ouverture d'extrusion. La présente invention se caractérise en ce que la section de paroi mobile (2) est libérée une fois le processus de mélange terminé et entraînée vers l'ouverture d'extrusion pour comprimer le ciment osseux, l'ouverture d'extrusion étant obturée de façon étanche par le dispositif d'obturation (9).

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