Systems and methods for a medical syringe
AssigneeJMS North America Corporation
InventorsShinya Nagase, Shenna Tang, Penghai Zhao
Life of this patent
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Abstract
Systems and methods for administering drugs to a patient, including a syringe system. The syringe system includes a plastic needle coupled to an end of a syringe barrel, the needle including a proximal taper and a distal taper. A cannula assembly is removably coupled to the plastic needle, the cannula including mating surfaces for the proximal and distal tapers of the plastic needle. The syringe system can also include a cannula cover with a first and second end with different sizes to respectively attach to the cannula assembly and the barrel when the cannula assembly is removed. The cannula may have a distal tip cut at an angle to ensure maximum removal of drug from a given vial.
Claims18
A syringe system, including a barrel, plunger and piston, comprising:
- a plastic needle coupled to an end of the barrel, the needle including a proximal taper at a proximal end of the needle, tapering from a proximal first end to a proximal second end toward a longitudinal axis of the needle from a first diameter of the needle to a second diameter of the needle less than the first diameter, the needle further including a distal taper at a distal tip of the needle, tapering from a distal first end to a distal second end toward the longitudinal axis from the second diameter to a third diameter of the needle less than the second diameter, the distal first end separated from the proximal second end;
- and
- a cannula assembly including a cannula and cannula hub, the cannula hub having an internal first mating surface that contacts the proximal taper of the needle and an internal second mating surface that contacts the distal taper of the needle, the cannula assembly removably coupled to the plastic needle.
A syringe system, including a barrel, plunger and piston, comprising:
- a plastic needle coupled to an end of the barrel, the needle including a proximal taper at a proximal end of the needle, tapering from a proximal first end to a proximal second end toward a longitudinal axis of the needle from a first diameter of the needle to a second diameter of the needle less than the first diameter, the needle further including a distal taper at a distal tip of the needle, tapering from a distal first end to a distal second end toward the longitudinal axis from the second diameter to a third diameter of the needle less than the second diameter;
- a cannula assembly removably coupled to the plastic needle;
- and
- a cannula cover having a first end, including a first internal surface mating with an exterior surface of the cannula assembly for removable attachment thereto, and a second end opposite the first send, including a second internal surface mating with an exterior surface of the barrel for removable attachment thereto.
A syringe system, including a barrel, plunger and piston, comprising:
- a plastic needle coupled to an end of the barrel, the needle including a proximal taper at a proximal end of the needle, tapering from a proximal first end to a proximal second end toward a longitudinal axis of the needle from a first diameter of the needle to a second diameter of the needle less than the first diameter, the needle further including a distal taper at a distal tip of the needle, tapering from a distal first end to a distal second end toward the longitudinal axis from the second diameter to a third diameter of the needle less than the second diameter, the distal first end separated from the proximal second end;
- and
- a cannula assembly removably coupled to the plastic needle, including:
- a cannula having a distal tip cut at an angle α to match a portion of an interior surface of a drug vial, wherein the cannula is positioned in alignment with the portion of the interior surface of the vial to remove substantially all of a material from the drug vial;
- and
- a cannula hub having an internal first mating surface that contacts the proximal taper of the needle and an internal second mating surface that contacts the distal taper of the needle.
Dependencies are inferred from the claim text.