Particle delivery

Details Particle delivery Particle delivery

A - Human Necessities

61

M

A61M 5/30 (2006.01) A61M 5/20 (2006.01) A61M 25/00 (2006.01)

Patent

CA 2208590

A needleless syringe comprising a body containing a lumen, an upstream end of which is, or is arranged to be, connected to a source of gaseous pressure which can suddenly be released into the lumen; the downstream end of the lumen terminating behind a bistable diaphragm which is movable between an inverted position in which it presents outwardly of the body a concavity for containing particles of a therapeutic agent, and an evened, outwardly convex, position; the arrangement being such that, in use, when gas under pressure is released into the lumen, the diaphragm will snap over from its inverted to its everted position and catapult the particles outwardly.

Une seringue sans aiguille comprend un corps ayant un canal dont une extrémité amont est agencée pour être reliée à une source de gaz sous pression, ce gaz pouvant être libéré brutalement dans le canal; l'extrémité aval du canal se termine derrière un diaphragme bistable qui est mobile entre une position en creux dans laquelle il présente à l'extérieur une concavité pour recevoir des particules d'un agent thérapeutique et une position bombée dans laquelle il présente à l'extérieur une convexité. Dans cet appareil, quand le gaz sous pression est libéré dans le canal, le diaphragme passe brutalement de sa position en creux vers sa position bombée pour projeter les particules à l'extérieur.

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