Intradermal injector

A - Human Necessities – 61 – M

Patent

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Details

A61M 5/20 (2006.01) A61M 5/31 (2006.01) A61M 5/42 (2006.01)

Patent

CA 2475573

An injection device that comprises a chamber (36) configured for containing a substance to be injected and a needle (48) operatively associated with the chamber (36) and having a length sufficient to deliver the substance to an intradermal injection site. A collar surrounds the needle (48), defining a collar cavity. The collar also has a peripheral forward skin-contacting surface that surrounds and is radially spaced from the needle and injection site by an area that is sufficiently large to allow a patient's skin to move into the collar cavity to properly position the needle for intradermal delivery of the substance to the injection site to allow spread of the injected substance under the skin while inhibiting or preventing backpressure within the skin from forcing the substance out through the injection site.

La présente invention concerne un dispositif d'injection constitué, d'une part d'une chambre configurée pour contenir une substance à injecter, et d'autre part une aiguille fonctionnellement associée à la chambre, et d'une longueur suffisante pour apporter la substance jusqu'à un site d'injection intradermique. Une collerette entourant l'aiguille définit une cavité de collerette. La face circulaire antérieure de cette collerette vient en contact avec la peau, autour de l'aiguille et du site d'injection, respectant un espacement radial définissant une surface assez grande pour permettre à la peau du patient de bouger dans la cavité de collerette. Cela permet de positionner correctement l'aiguille en vue de l'administration intradermique de la substance au site d'injection, et donc à la substance injectée de se diffuser correctement sous la peau tout en évitant un retour de pression faisant refluer de la peau la substance via le site d'injection.

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