ADJUSTABLE PENETRATION DEPTH SYRINGE

摘要

A syringe is provided with an assembly received on the distal end for adjusting the penetration depth. In embodiments, the assembly includes a collar attached to the syringe hub which moves with respect to the needle between axial positions depending on the desired needle penetration depth. The adjustable penetration depth syringe is useful in the context of self-administered drugs such as insulin, where a longer length needle is needed to fill a syringe from a vial, but a shorter penetration depth is preferred for administering a subcutaneous injection.

主权项

1. A syringe with adjustable penetration depth, comprising:
a tubular syringe barrel; a plunger positioned within the syringe barrel; a hub bearing a needle and attached to the syringe barrel; a movable collar having an open proximal end received over the hub, a distal end wall having an opening through which the needle protrudes, and a sidewall extending proximally from the distal end wall, the sidewall having an interior surface engaging the hub or syringe barrel; and a retaining feature on the collar engaging the hub or barrel and retaining the collar at a plurality of axial positions; wherein the collar travels with respect to the hub along a path defined by features on the interior surface of the sidewall engaging the hub or barrel, exposing a greater length of the needle as the collar travels toward the plunger; and wherein the collar is retained in a fixed position at said first and second axial positions.