Improvement in injection cartridges

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/178 (2006.01) A61M 5/145 (2006.01) A61M 5/28 (2006.01) A61M 5/31 (2006.01)

Patent

CA 2171632

In an injection cartridge (1) of the single-chamber or dual-chamber typo, wherein a front piston (3) serves to expel an injectable preparation (2) through an outlet conduit (4) for administration, a supplementary chamber is arranged behind the front piston (3) and is sealed at its rear end by a rear piston (10). This supplementary chamber contains a rinsing liquid (9), and through a bypass connection (11) arranged at the front end of the cartridge (1), this rinsing liquid (9) may be made to flow around the front piston (3) and be expelled through the outlet conduit (4). This outlet conduit (4) will thereby be rinsed, and residues of the injectable preparation (2) remaining in said outlet conduit will be displaced to be administered.

Cartouche d'injection (1) à une ou deux chambres dans laquelle un piston (3) frontal sert à l'expulsion par un conduit de sortie (4) d'une préparation injectable à administrer (2) et dans laquelle une chambre supplémentaire ménagée derrière le piston frontal est obturée à son extrémité arrière par un piston arrière (10). Cette chambre supplémentaire contient un liquide de rinçage (9) qui peut s'écouler par une dérivation (11) disposée à l'extrémité frontale de la cartouche (1) autour du piston frontal (3) puis être expulsé par le conduit de sortie (4) lequel s'en trouvera rincé , le reliquat de la préparation injectable (2) restant dans ledit conduit de sortie étant déplacé en vue de son administration.

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