System and method for safety syringe

Patent metadata

Field	Value
Publication number	US-12133973-B2
Application number	US-202117215097-A
Country	US
Kind code	B2
Filing date	Mar 29, 2021
Priority date	Nov 1, 2016
Publication date	Nov 5, 2024
Grant date	Nov 5, 2024

Abstract

A system for injecting includes a syringe body defining a proximal opening and a distal needle interface. The system also includes a plunger member defining a plunger interior and configured to be manually manipulated to insert a stopper member relative to the syringe body, the plunger member. The plunger member includes a needle retention feature disposed in the plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior. The system further includes a needle hub assembly coupled to the distal needle interface of the syringe body. The needle assembly includes a needle having a needle proximal end feature, a hub, and a needle latching member configured to couple the needle to the hub. The needle is at least partially retractable into plunger interior. The needle proximal end feature includes an annular distally facing surface.

First claim

What is claimed is:

1. A system for injecting, comprising:
a syringe body defining a proximal opening and a distal needle interface;
a plunger member defining a plunger interior and configured to be manually manipulated to insert a stopper member relative to the syringe body, the plunger member including
a needle retention feature disposed in the plunger interior,
an energy-storage member disposed in the plunger interior, and
an energy-storage member latching member disposed in the plunger interior; and

a needle hub assembly coupled to the distal needle interface of the syringe body, the needle hub assembly including
a needle having an annular recess and a needle proximal end feature comprising an elongate needle proximal portion, a collar portion, and a proximal tip,
a hub, and
a needle latching member configured to interact with the annular recess in the needle to removably couple the needle to the hub,

wherein the needle is at least partially retractable into the plunger interior upon manipulation of the plunger member relative to the syringe body to transform the energy-storage member latching member from a latched state to an unlatched state,
wherein the elongate needle proximal portion has a first cross-sectional diameter,
wherein the collar portion has a second cross-sectional diameter, and
wherein the second cross-sectional diameter is greater than the first cross-sectional diameter,
wherein the collar portion comprises an uninterrupted annular distally facing surface,
wherein the needle proximal end feature includes a proximal opening and a hollow interior, and
wherein the needle comprises a tubular member coupled to the proximal end feature such that an interior of the tubular member is in fluid communication with the hollow interior of the needle proximal end feature, and
wherein the tubular member includes a side opening and the annular recess.

2. A system for injecting, comprising:
a syringe body defining a proximal opening and a distal needle interface;
a plunger member defining a plunger interior and configured to be manually manipulated to insert a stopper member relative to the syringe body, the plunger member including
a needle retention feature disposed in the plunger interior,
an energy-storage member disposed in the plunger interior, and
an energy-storage member latching member disposed in the plunger interior; and

a needle hub assembly coupled to the distal needle interface of the syringe body, the needle hub assembly including
a needle having an annular recess and a needle proximal end feature comprising an elongate needle proximal portion, a collar portion, and a proximal tip,
a hub, and
a needle latching member configured to interact with the annular recess in the needle to removably couple the needle to the hub,

wherein the needle is at least partially retractable into the plunger interior upon manipulation of the plunger member relative to the syringe body to transform the energy-storage member latching member from a latched state to an unlatched state,
wherein the elongate needle proximal portion has a first cross-sectional diameter,
wherein the collar portion has a second cross-sectional diameter, and
wherein the second cross-sectional diameter is greater than the first cross-sectional diameter,
wherein the collar portion comprises an uninterrupted annular distally facing surface,
wherein the needle proximal end feature includes a proximal opening and a hollow interior, and
wherein the proximal opening is defined by blunted edges of the needle proximal end feature.

3. A system for injecting, comprising:
a syringe body defining a proximal opening and a distal needle interface;
a plunger member defining a plunger interior and configured to be manually manipulated to insert a stopper member relative to the syringe body, the plunger member including
a needle retention feature disposed in the plunger interior,
an energy-storage member disposed in the plunger interior, and
an energy-storage member latching member disposed in the plunger interior; and

a needle hub assembly coupled to the distal needle interface of the syringe body, the needle hub assembly including
a needle having an annular recess and a needle proximal end feature comprising an elongate needle proximal portion, a collar portion, and a proximal tip,
a hub, and
a needle latching member configured to interact with the annular recess in the needle to removably couple the needle to the hub,

wherein the needle is at least partially retractable into the plunger interior upon manipulation of the plunger member relative to the syringe body to transform the energy-storage member latching member from a latched state to an unlatched state,
wherein the elongate needle proximal portion has a first cross-sectional diameter,
wherein the collar portion has a second cross-sectional diameter, and
wherein the second cross-sectional diameter is greater than the first cross-sectional diameter,
wherein the collar portion comprises an uninterrupted annular distally facing surface,
wherein the needle comprises a shoulder configured to increase a distal force required to push the stopper member over the needle.

4. The system of claim 3 , wherein the needle retention feature comprises a receiving member having a plurality of latching members to cooperate with the uninterrupted annular distally facing surface to prevent distal movement of the needle relative to the needle retention feature, when the needle is coupled to the needle retention feature, and
wherein the receiving member has a rigid ring disposed at a distal end thereof.

5. The system of claim 3 , wherein the needle is configured to pierce through the stopper member to initiate needle retraction.

6. The system of claim 3 , wherein the uninterrupted annular distally facing surface is configured to prevent distal movement of the needle relative to the needle retention feature, when the needle is coupled to the needle retention feature.

7. The system of claim 3 , wherein a plurality of latching members consists of two latching members, and
wherein each of the two latching members has an arcuate cross-sectional geometry.

8. The system of claim 3 , wherein a plurality of latching members consists of four latching members.

9. The system of claim 3 , the receiving member also having a plurality of slits, wherein each slit of the plurality of slits is disposed between two latching members of a plurality of latching members.

10. The system of claim 3 , wherein the elongate needle proximal portion consists of a solid body.

11. The system of claim 3 , wherein the proximal tip of the needle has a third cross-sectional diameter, and
wherein the first cross-sectional diameter is greater than the third cross-sectional diameter.

12. The system of claim 3 , wherein the needle proximal end feature includes a proximal opening and a hollow interior.

13. The system of claim 3 , the needle proximal end feature further comprising a proximally directed tapering surface.

14. The system of claim 13 , wherein the proximally directed tapering surface defines a proximally pointed cone.

15. The system of claim 3 , the receiving member having an open configuration in which the needle proximal end feature can move proximally past the receiving member and a resting configuration in which the needle proximal end feature cannot move distally past the receiving member,
wherein a plurality of latching members are closer to each other when the receiving member is in the resting configuration than when the receiving member is in the open configuration

Assignees

• Credence Medsystems Inc

Inventors

• Shluzas Alan E
• Diaz Stephen H
• Shanley John F
• Segelke Scott
• Merhige John

Classifications

• A61M5/3293

  characterised by features of the needle hub · CPC title

• A61M5/31513

  Piston constructions to improve sealing or sliding · CPC title

• A61M5/3148

  Means for causing or aiding aspiration or plunger retraction · CPC title

• A61M5/3137 Primary

  Specially designed finger grip means, e.g. for easy manipulation of the syringe rod · CPC title

• A61J1/2096

  Combination of a vial and a syringe for transferring or mixing their contents · CPC title