NEEDLE CAPTURE RETRACTABLE NEEDLE SAFETY SYRINGES

摘要

Needle assemblies for retractable needle syringes include a needle, a needle seal, and a needle retainer, wherein the needle includes one or more barbs substantially at its proximal end. The needle retainer engages an optional needle-over-mold component that is fixedly attached to the needle. The needle-over-mold may be connected to the distal surface of the needle seal and may travel, such as by being a couple component, with the needle during the operation of the syringe. A safety syringe includes a barrel having a needle assembly mounted at a distal end and a plunger assembly mounted at a proximal end. A drug may be contained in a drug chamber of barrel, between the plunger assembly and needle assembly, proximally of the needle seal for drug delivery to a user. The plunger assembly includes a plunger seal having a needle-engaging portion to capture the needle at the barb for retraction.

主权项

1. A retractable needle comprising a cannula that comprises: a delivery tip comprising at least one delivery aperture; and a proximal end comprising at least one inlet aperture in fluid communication with the at least one delivery aperture in the delivery tip; the retractable needle further comprising at least one projection engageable by a plunger, wherein said at least one inlet aperture of the proximal end of the cannula is located distally of the at least one projection.