Disposable injection device

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/30 (2006.01) A61M 5/48 (2006.01) A61M 5/20 (2006.01)

Patent

CA 2425150

The present invention is a hand-operated injector device for injecting parenteral medications consisting of a cap, a plunger, a base, and a snap means. The cap contains a hollow central finger which upon proper hand force, moves toward a narrow plunger with an ability to slide into an annular wide plunger within an self-contained injection capsule. The movemnet of the cap drives the narrow plunger toward a narrow injection orifice at the bottom the capsule containing liquid medicament through which, the medicament under high pressure, forms a liquid jet through subcutaneous tissue of the patient. The injector may contain an external spring assisted holder or an internal spring assisted holder where the central finger is modified so as to be spring loaded. Finally, the spring injector may contain a cocking tab and a reusable power case. The injector device requires little training to use, reduces pain, improves injection safety and eliminates the need for a check valve.

L'invention concerne un dispositif manuel d'injection de médicaments par voie parentérale, comprenant un couvercle, un plongeur, une base et un système de fermeture encliquetable. Le couvercle comporte un doigt central creux. Sous pression de la main appropriée, ce doigt se déplace vers un plongeur étroit capable de coulisser dans un plongeur annulaire large à l'intérieur d'une capsule d'injection intégrée. Le couvercle entraîne le plongeur étroit vers un orifice d'injection étroit au bas de la capsule contenant le médicament liquide, à travers lequel le médicament sous haute pression forme un jet liquide qui pénètre dans le tissu sous-cutané. Le dispositif peut comprendre un support à ressort externe ou interne dans lequel on modifie le doigt central pour qu'il soit à ressort. Enfin, le système peut comporter un levier d'armement et un boîtier d'alimentation réutilisable. Le dispositif exige peu d'apprentissage à l'utilisation, réduit la douleur, améliore la sécurité d'injection et ne nécessite aucun clapet de retenue.

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