System and method for safety syringe

Patent metadata

Field	Value
Publication number	US-11844931-B2
Application number	US-202117472886-A
Country	US
Kind code	B2
Filing date	Sep 13, 2021
Priority date	Jun 8, 2018
Publication date	Dec 19, 2023
Grant date	Dec 19, 2023

Abstract

A system for serially injecting liquids includes a syringe body, proximal and distal stopper members disposed in the syringe body, a first liquid in a distal chamber, a second liquid in a proximal chamber, a plunger member, and a needle hub assembly coupled to a distal needle interface of the syringe body. The plunger member includes a needle retention feature disposed in a plunger interior, an energy-storage member disposed in the plunger interior, and an energy-storage member latching member disposed in the plunger interior. 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. Manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid, then the second liquid. The needle is at least partially retractable into plunger interior.

First claim

What is claimed is:

1. A system for serially injecting liquids, comprising:
a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
a first liquid in the distal chamber;
a second liquid in the proximal chamber;
a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body; and
a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
a hub, and
a connector fluidly coupled to the transfer pipe distal end,

wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
wherein the transfer pipe defines a transfer pipe interior, a distal end opening at the transfer pipe distal end, a middle opening, and a proximal opening, wherein the distal end opening, the middle opening, and the proximal opening are fluidly coupled through the transfer pipe interior, and
wherein a distance between the proximal opening and the distal end of the syringe body is substantially equal to a length of the distal stopper member, such that when the distal stopper member is inserted to the distal end of the syringe body, the proximal stopper member is inserted distally relative to the transfer pipe to position the proximal opening in the proximal chamber.

2. The system of claim 1 , wherein first and second sizes of the respective distal and proximal chambers can be modified by movement of the proximal and distal stopper members relative to the syringe body.

3. The system of claim 1 , wherein the proximal and distal stopper members and the syringe body are configured such that distally directed force applied to the proximal stopper member is transmitted through the second liquid to the distal stopper member until the proximal stopper member is inserted distally relative to the transfer pipe to position the proximal opening in the proximal chamber.

4. The system of claim 1 , wherein the proximal stopper member comprises a first polymer coating on a distal surface of the proximal stopper member, and
wherein the distal stopper member comprises a second polymer coating on a proximal surface of the distal stopper member, such that the proximal chamber is defined by the syringe body and the first and second polymer coatings.

5. The system of claim 1 , the distal stopper member having
a funnel that tapers in a proximal direction, and
a space disposed at a tapered proximal end of the funnel.

6. The system of claim 5 , wherein the funnel is configured to guide the transfer pipe proximal end into the space at the tapered proximal end of the funnel, to thereby align the transfer pipe with the distal stopper member.

7. The system of claim 6 , wherein the funnel is configured to align the transfer pipe with the distal stopper member during assembly of the system.

8. The system of claim 6 , wherein the funnel is configured to align the transfer pipe with the distal stopper member during manipulation of the plunger member to insert the proximal stopper member distally relative to the syringe body.

9. The system of claim 1 , the distal stopper member having a detent to resist passage of the transfer pipe proximal end through the distal stopper member.

10. The system of claim 9 , the detent having a “U” shape.

11. The system of claim 9 , the detent having a flattened cross-section.

12. The system of claim 9 , the detent having a transfer pipe proximal end receiving feature.

13. The system of claim 12 , the transfer pipe proximal end receiving feature having a beveled surface.

14. The system of claim 9 , the transfer pipe having a shoulder to resist passage of the transfer pipe through the detent.

15. The system of claim 14 , the shoulder and the detent configured such that a resistance to the shoulder passing through the detent is overcome by about 2 lbs. to about 5 lbs. of distally directed force applied to the plunger member.

16. The system of claim 15 , wherein the detent is modifiable to modulate the distally directed force required to overcome the resistance.

17. The system of claim 14 , the shoulder comprising an angle of about 50 degrees.

18. The system of claim 9 , the transfer pipe having a groove to resist passage of the transfer pipe through the detent.

19. The system of claim 18 , the groove and the detent configured such that a resistance to the groove passing through the detent is overcome by about 2 lbs. to about 5 lbs. of distally directed force applied to the plunger member.

20. The system of claim 19 , wherein the detent is modifiable to modulate the distally directed force required to overcome the resistance.

21. A system for serially injecting liquids, comprising:
a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proximal chamber between the proximal stopper member and the distal stopper member and a distal chamber between the distal stopper member and the distal end of the syringe body;
a first liquid in the distal chamber;
a second liquid in the proximal chamber;
a plunger member configured to be manually manipulated to insert the proximal stopper member distally relative to the syringe body; and
a hub assembly coupled to the distal interface of the syringe body, the hub assembly including
a transfer pipe having a transfer pipe proximal end and a transfer pipe distal end,
a hub, and
a connector fluidly coupled to the transfer pipe distal end,

wherein manipulating the plunger member to insert the proximal stopper member distally relative to the syringe body initially expels the first liquid from the distal chamber through the transfer pipe, then serially expels the second liquid from the proximal chamber through the transfer pipe,
wherein the transfer pipe defines a transfer pipe interior, a distal end opening at the transfer pipe distal end, a middle opening, and a proximal opening, wherein the distal end opening, the middle opening, and the proximal opening are fluidly coupled through the transfer pipe interior,
wherein the system has
a first injection configuration wherein the proximal opening is disposed in the distal chamber, and
a second injection configuration wherein the proximal opening is disposed in the proximal chamber, thereby allowing transfer of the second liquid from the proximal chamber, through the proximal opening and the transfer pipe interior, and out the distal end opening,

wherein the distal stopper member obstructs the middle opening when the system is in the second injection configuration.

22. A system for serially injecting liquids, comprising:
a syringe body defining a syringe proximal opening and a distal interface at a distal end of the syringe body;
a proximal stopper member and a distal stopper member disposed in the syringe body, forming a proxi

Assignees

• Credence Medsystems Inc
• Credence MedSystems

Inventors

• Diaz Stephen H
• Tillack Jeff
• Shluzas Alan E
• Shanley John F
• Thayer Dan
• Steese-Bradley Gary
• Merhige John

Classifications

• A61M5/19 Primary

  having more than one chamber {, e.g. including a manifold coupling two parallelly aligned syringes through separate channels to a common discharge assembly (surgical glue applicators A61B17/00491)} · CPC title

• A61M2005/1787

  Syringes for sequential delivery of fluids, e.g. first medicament and then flushing liquid · CPC title

• A61M5/3129

  Syringe barrels (A61M5/3205 and A61M5/50 take precedence) · CPC title

• A61M5/31511

  Piston or piston-rod constructions, e.g. connection of piston with piston-rod (A61M5/5066 takes precedence) · CPC title

• A61M2005/31598

  having multiple telescopically sliding coaxial pistons encompassing volumes for components to be mixed · CPC title