Abstract: A syringe finger ring and finger ring inserts, that in various embodiments, provides or connects to a syringe that comprises a syringe body capable of having a volume of material therein and a plunger disposed to enter the syringe body and dispense material from the syringe body by movement of plunger, and a novel a finger ring related structures having an open area and connected, by various structures, to the plunger adapted to receive a finger within the finger ring open area, including a spacer of various embodiments inserted within the open area to selectively reduce the open area and provide more controllable engagement of the syringe plunger by the operator finger in distal and proximal strokes.

Abstract: An improved hypodermic syringe including finger-holding surfaces that substantially or completely surround the operator finger and include an interior tapered portion to better engage a finger, which facilitates one-handed use by allowing the same hand that holds the syringe to operate the plunger conveniently to accomplish both the distal (injecting) stroke and the proximal (aspirating) stroke.