Patent EP-2213322-A1 (EP)
Inventor: KAWAMURA HIDEAKI
IPC: A61M15/08
Filed: 2008-10-28
Abstract: [Problem] An attention is focused on a prefilled type nasal drip appliance among the nasal drip appliances. It is an object to provide a prefilled type nasal drip appliance that enables a production cost thereof to be suppressed, that can be handled by all people in the same way, that can be easily handled, and that enables a medicinal solution to be sprayed into the nostril with a certainty. 
     [Means for Solving Problems] 
     A prefilled type nasal drip appliance is configured to be comprised of a syringe barrel provided with a spray hole of a medicinal solution on one side and a medical solution storage part that stores the medicinal solution in advance on the other side; an elastic piston that is inserted into a syringe barrel in a slidable manner to the inner circumferential face of the syringe barrel; a plunger that is attached to the rear end of the piston and that enables the piston to be moved in a direction of an axis of the syringe barrel; and an elastic center stopper that is inserted into the syringe barrel in such a manner that the center stopper is located between the spray hole and the piston and that can slide on the inner circumferential face of the syringe barrel, wherein the medicinal solution is stored between the center stopper and the piston in a liquid-tight state in advance, the syringe barrel is provided with a center stopper locking part between the spray hole formed on one side and the center stopper, a conduction part that is a passage way that can introduce the medicinal solution is formed at one location or a plurality of locations in the center stopper locking part, a syringe barrel side protruding part that is protruded inside from the inner circumferential face of the syringe barrel is formed on the other end side of the syringe barrel, the plunger is provided with a plunger side protruding part that is protruded outside from the outer circumferential face of the plunger is formed at a generally central part in a direction of an axis of the plunger, the syringe barrel side protruding part and the plunger side protruding part are configured to be engaged with each other, in the case in which the plunger is moved in a direction of the spray hole of the syringe barrel and the plunger side protruding part gets over the syringe barrel side protruding part for releasing the engagement with each other, a pressure of a predetermined level or more is required for the release, a pressure of a predetermined level or more is applied to the plunger, the plunger is moved in a direction of the spray hole of the syringe barrel, the engagement of the plunger side protruding part and the syringe barrel side protruding part is released, the medicinal solution moves the center stopper in a direction of the spray hole by a pressure that is applied to the plunger in the release of the engagement, the center stopper gets over the conduction part that is formed to the center stopper locking part, a medical solution inflow groove is formed between the conduction part and the center stopper, the medical solution storage part and the spray hole are interconnected with each other, and the medicinal solution is therefore flown and moved in a direction of the spray hole from the medical solution inflow groove, whereby the medical solution can be sprayed from the spray hole.