Injection device, especially for bone cement

Details Injection device, especially for bone cement Injection device, especially for bone cement

A - Human Necessities

61

F

A61F 2/46 (2006.01) A61B 17/88 (2006.01) A61C 5/00 (2006.01) B05C 17/01 (2006.01)

Patent

CA 2554350

The invention relates to an injection device (1), especially for bone cement, comprising A) a syringe base (3) having a longitudinal axis (2), a front end (6), a connecting piece (8) disposed on the front end (6) and having a coaxial bore (21), and a coaxial cavity (4); B) an injection plunger (5), coaxially displaceable in the cavity (4); and C) a cannula (13) which can be linked with the connecting piece (8) and which has a center bore (14) and a rear end (15). The injection device is characterized in that D) the syringe base (3), on its front end (6), has a transition segment (22) having a bore (9) linking the cavity (4) with the bore (21) in the connecting piece (8), E) the bore (9) in the transition segment (22) and the center bore (14), at least on the rear end (15) of the cannula (13), having the same orthogonal cross-sectional area q relative to the longitudinal axis (2).

Dispositif d'injection (1), en particulier pour ciment osseux, comprenant : A) un corps de seringue (3) présentant un axe longitudinal (2), une extrémité avant (6), une pièce de raccordement (8) disposée à l'extrémité arrière (6), présentant un trou coaxial (21), et un volume creux coaxial (4) ; B) un piston de seringue (5) déplaçable coaxialement dans le volume creux (4) ; et C) une canule (13) pouvant être reliée à la pièce de raccordement (8), présentant un trou central (14) et une extrémité arrière (15), dispositif caractérisé en ce que D) le corps de seringue (3) présente à son extrémité arrière (6), un segment de transition (22) ayant un trou coaxial (9) reliant le volume creux (4) avec le trou (21) pratiqué dans la pièce de raccordement (8), et en ce que E) le trou (9) dans le segment de transition (22), et le trou central (14) présentent au moins à l'extrémité arrière (15) de la canule (13), la même section q orthogonale à l'axe longitudinal (2).

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