Process and apparatus for mixing and injecting a medicine

Details Process and apparatus for mixing and injecting a medicine Process and apparatus for mixing and injecting a medicine

A - Human Necessities

61

M

A61M 5/19 (2006.01) A61M 5/24 (2006.01) A61M 5/315 (2006.01) A61M 5/32 (2006.01) A61M 5/50 (2006.01)

Patent

CA 2074256

2074256 9110460 PCTABS00006 To ensure the most careful mixing of the liquid and the dry phase in a two-compartment carpule (1) this carpule (1) is placed in a housing (17) and secured by mounting a needle (19). A piston rod (9) may then be passed forward to mix the medicine, this mixing being obtained by a uniform forwards movement of the piston rod, air in the mixing chamber being let out through the needle (19). For subsequent setting a dose of the mixed medicine to be injected, the movement of the piston may be preset by separating through a threaded connection (26) a press part (10, 20) from the piston rod (9). By this separation the movement of the piston rod (9) is restricted during the injection and consequently the injected dose is limited.

Pour assurer le mélange le plus intime possible de la phase liquide et de la phase sèche d'un médicament contenu dans une cartouche du type "Carpule" à deux compartiments (1), on place cette cartouche (1) dans un logement (17) et on la fixe au moyen d'une aiguille (19). Une tige de piston (9) peut ensuite être amenée à avancer pour effectuer le mélange du médicament, mélange qui est obtenu par une avance uniforme de la tige de piston, l'air contenu dans la chambre de mélange étant amené à sortir par l'aiguille (19). Pour sélectionner ensuite une dose du médicament mélangé à injecter, on peut présélectionner le mouvement du piston en séparant une partie à pression (10, 20) de la tige de piston (9) grâce à un raccord fileté (26). Grâce à cette séparation, on limite le mouvement de la tige de piston (9) pendant l'injection et par conséquent, on limite la dose injectée.

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