Priming system for infusion devices

Patent metadata

Field	Value
Publication number	US-11389584-B2
Application number	US-201716627828-A
Country	US
Kind code	B2
Filing date	Jul 6, 2017
Priority date	Jul 6, 2017
Publication date	Jul 19, 2022
Grant date	Jul 19, 2022

Abstract

Priming systems and infusion assemblies are provided. For example, a priming system comprises a priming conduit having a priming portion and a pressure portion. The priming portion is in fluid communication with a first fluid source, with an inlet and an outlet for ingress and egress of a first fluid from the first fluid source. The pressure portion is in fluid communication with a second fluid source connected by a connector. Disposed within the priming conduit are a biasing member and a valve having an open position and a closed position. The biasing member is in operable communication with the valve to urge the valve into the closed position such that the valve defaults to the closed position. The open position allows the first fluid to flow from the inlet to the outlet and the closed position prevents the first fluid from flowing from the inlet to the outlet.

First claim

What is claimed is:

1. A priming system, comprising:
a priming conduit having
a priming portion in fluid communication with a first fluid source, the priming portion having an inlet for ingress of a first fluid from the first fluid source and an outlet for egress of the first fluid, and
a pressure portion including a connector for connecting a second fluid source such that the pressure portion is in fluid communication with the second fluid source, and a plug;

a valve disposed within the priming conduit, the valve having an open position and a closed position; and
a biasing member disposed within the priming conduit, the biasing member in operable communication with the valve to urge the valve into the closed position such that the valve defaults to the closed position,
wherein the valve is disposed between the inlet and the outlet of the priming portion such that the open position of the valve is configured to allow the first fluid to flow from the inlet to the outlet and the closed position of the valve is configured to prevent the first fluid from flowing from the inlet to the outlet.

2. The priming system of claim 1 , wherein the priming conduit further comprises a stop, and wherein the biasing member is in contact with the stop such that the biasing member works against the stop to control the open and closed positions of the valve.

3. The priming system of claim 1 , wherein the connector is a luer connector.

4. The priming system of claim 1 , wherein the first fluid source is an infusion pump.

5. The priming system of claim 1 , wherein the second fluid source is a syringe supplying a positive pressure to the pressure portion.

6. The priming system of claim 1 , wherein the second fluid source is a vacuum source creating a negative pressure within the pressure portion.

7. The priming system of claim 1 , further comprising a seal disposed between the valve and the pressure portion of the priming conduit to prevent the second fluid from flowing into the priming portion.

8. The priming system of claim 7 , wherein the valve is a piston and the seal is an O-ring extending about the piston and in contact with an inner surface of the pressure portion of the priming conduit.

9. The priming system of claim 1 , wherein the valve is a piston having a surface area, and wherein the piston has a varying diameter to minimize the surface area in contact with the priming conduit.

10. An infusion assembly, comprising:
an elastomeric pump configured to provide a fluid under pressure;
a flow path in fluid communication with the pump for providing a continuous and substantially constant flow rate of the fluid from the pump;
a bolus flow path for the delivery of a bolus dose of the fluid;
a flow restrictor positioned within the bolus flow path;
a bolus delivery device positioned within the bolus flow path; and
a priming system in fluid communication with the bolus flow path and configured to receive the fluid from the pump to prime the bolus delivery device, the priming system including:
a priming conduit having:
a priming portion in fluid communication with the pump, the priming portion having an inlet for ingress of the fluid from the pump and an outlet for egress of the fluid, and
a pressure portion including a connector for connecting a second fluid source such that the pressure portion is in fluid communication with the second fluid source;

a valve disposed within the priming conduit, the valve having an open position and a closed position; and
a biasing member disposed within the priming conduit, the biasing member in operable communication with the valve to urge the valve into the closed position such that the valve defaults to the closed position,

wherein the valve is disposed between the inlet and the outlet of the priming portion such that the open position of the valve is configured to allow the fluid to flow from the inlet to the outlet and the closed position of the valve is configured to prevent the fluid from flowing from the inlet to the outlet,
wherein the priming conduit bypasses the flow restrictor such that the inlet of the priming portion is in fluid communication with the bolus flow path upstream of the flow restrictor and the outlet of the priming portion is in fluid communication with the bolus flow path downstream of the flow restrictor.

11. The infusion assembly of claim 10 , wherein the second fluid source provides a second fluid to the pressure portion to move the valve from the closed position to the open position.

12. The infusion assembly of claim 10 , wherein the priming conduit further comprises a stop, and wherein the biasing member is in contact with the stop such that the biasing member works against the stop to control the open and closed positions of the valve.

13. The infusion assembly of claim 10 , wherein the connector is a luer connector.

14. The infusion assembly of claim 10 , wherein the second fluid source is a syringe supplying a positive pressure to the pressure portion.

15. The infusion assembly of claim 10 , wherein the second fluid source is a vacuum source creating a negative pressure within the pressure portion.

16. The infusion assembly of claim 10 , further comprising a seal disposed between the valve and the pressure portion of the priming conduit to prevent the second fluid from flowing into the priming portion.

17. The infusion assembly of claim 16 , wherein the valve is a piston and the seal is an O-ring extending about the piston and in contact with an inner surface of the pressure portion of the priming conduit.

18. The infusion assembly of claim 10 , wherein the valve is a piston having a surface area, and wherein the piston has a varying diameter to minimize the surface area in contact with the priming conduit.

Assignees

• Avent Inc

Inventors

• Truong Hector Dung

Classifications

• A61M2005/1402

  Priming · CPC title

• A61M2039/2486

  Guided stem, e.g. reciprocating stopper · CPC title

• F04D9/006

  by venting gas or using gas valves · CPC title

• A61M5/16881

  Regulating valves (on-off valves, e.g. clamps A61M39/28) · CPC title

• A61M2039/224

  of the slide-valve type · CPC title