Prefilled syringe jet injector

摘要

A jet injector that includes a prefilled syringe. The syringe includes a fluid chamber that contains a medicament. The syringe also has an injection-assisting needle, and a plunger is movable within the fluid chamber. A housing is configured for allowing insertion of the needle to a penetration depth. An energy source is configured for biasing the plunger to produce an injecting pressure in the medicament in the fluid chamber of between about 80 and 1000 p.s.i. to jet inject the medicament from the fluid chamber through the needle to an injection site.

主权项

1. An injector, comprising:
a prefilled syringe comprising:
a container portion defining a fluid chamber containing a medicament;an injection-assisting needle disposed at the distal end of the fluid chamber having an injecting tip configured for piercing an insertion location and defining a fluid pathway in fluid communication with the fluid chamber; anda plunger movable within the fluid chamber; a housing that houses the prefilled syringe and comprises a guard that is movable with respect to the housing; a syringe support supportively mounting the prefilled syringe to the housing; and an energy source configured for biasing the plunger with a force selected to produce an injecting pressure in the medicament in the fluid chamber that substantially remains from about 80 p.s.i. to about 1000 p.s.i. during injection of the medicament to inject the medicament from the fluid chamber through the needle, wherein a penetration depth and injecting pressure are sufficient to substantially prevent backflow of the injected medicament.