Medication delivery system

• US 6,726,655 B1
• Filed: 11/05/1999
• Issued: 04/27/2004
• Est. Priority Date: 11/05/1999
• Status: Expired due to Fees

• Current Assignee: Tandem Medical, Inc.
• Original Assignee: Tandem Medical, Inc.
• Inventors: Lieberman, Marc S., Brengle, David R., Kleeman, Michael W.
• Primary Examiner(s): Casler, Brian L.
• Assistant Examiner(s): DESANTO, MATTHEW F
• Application Number:
  US09/434,972
• Time in Patent Office: 1,635 Days
• Field of Search: 604/65, 604/66, 604/67, 604/131, 604/134, 604/135, 604/141, 604/151, 604/191, 604/27, 128/DIG.12, 128/DIG.13
• US Class Current: 604/131
• CPC Class Codes: A61M 2005/14506 mechanically driven, e.g. spring or clockwork
• CPC Class Codes: A61M 5/145 using pressurised reservoirs, e.g. pressurised by means of pistons

Abstract

The present invention comprises a medication delivery system for administering an infusion therapy using a medication delivery pump and related fluid container. Medications in a flexible bag of the container are expelled from the bag by the pump into an administration set and delivered to an infusion site. The administration set limits the rate at which a spring compresses the bag. The system provides improved infusion therapy administration which is particularly advantageous for reducing errors, infections and other complications associated with manual infusion techniques.

Claims

1. A medication delivery system, comprising:

a bag,

an administration set, and

a pump,

said bag having;

at least one chamber containing a medication fluid, and

a manifold, wherein said manifold comprises at least one back check valve associated with a respective chamber of the bag, wherein a hydraulic lock is formed between the back check valve(s) and the air-eliminating filter of the administration set, which lock is overcome upon the application of a threshold pressure on the chamber;

said administration set adapted to receive the medication fluid from the bag at a predetermined pressure and deliver the medication fluid to an infusion site at a predetermined flow rate, wherein the administration set includes an air-eliminating filter for eliminating air bubbles from the medication fluid before delivery of the fluid to the infusion site; and

said pump having an activating mechanism configured to activate said chamber(s) to dispense said fluid from the bag, wherein the activating mechanism generates the predetermined pressure in each chamber.

2. A system according to claim 1, wherein a configuration of the chamber(s) determines the pressure generated therein by the activating mechanism.

3. A system according to claim 1, wherein said activating mechanism comprises a constant force spring.

4. A system according to claim 1, wherein chambers in said bag are activated based on a predetermined configuration of said chambers.

5. A system according to claim 1, wherein the administration set includes a micro-bore tubing having a length and an inner diameter that establishes the predetermined flow rate.

6. A medication delivery system, comprising:

a bag comprising

a plurality of chambers and a plurality of bag ports through an outer surface of said bag, each said chamber in fluid communication with at least one said bag port, and

a manifold assembly comprising a plurality of manifold ports integrally coupled to said bag ports, and at least one common port, whereby each said chamber is in fluid communication with at least one said manifold port to provide a flow path for delivering medications out of said chambers to said common port; and

a pump having an activating mechanism configured to activate said chambers to dispense said pharmacological agents from said bag.

7. A system according to claim 6, further comprising an administration set that receives the medication fluid from the bag at the predetermined pressure and delivers the medication fluid to an infusion site at a predetermined flow rate.

8. A system according to claim 7, wherein the administration set includes a micro-bore tubing having a length and an inner diameter that establishes the predetermined flow rate.

9. A system according to claim 8, wherein the administration set includes an air-eliminating filter for eliminating air bubbles from the medication fluid before delivery of the fluid to the infusion site.

10. A system according to claim 9, wherein said manifold comprises at least one back check valve associated with a respective chamber of the bag, wherein a hydraulic lock is formed between the back check valves and the air-eliminating filter, which lock is overcome upon the application of a threshold pressure on the chamber.

11. A system according to claim 6, wherein the activating mechanism generates a predetermined pressure in each chamber.

12. A system according to claim 6, wherein a configuration of the chamber(s) determines the pressure generated therein by the activating mechanism.

13. A system according to claim 6, wherein said activating mechanism comprises a constant force spring.

14. A system according to claim 6, wherein chambers in said bag are activated based on a predetermined configuration of said chambers.

15. A medication delivery system, comprising:

a bag comprising

a plurality of chambers, a plurality of bag ports through an outer surface of said bag, wherein each said chamber is in fluid communication with at least one said bag port via a conduit, and a plurality of exit ports connecting each said chamber to an associated conduit, wherein said bag is configured and arranged such that each chamber does not overlap with any adjacent chamber along at least one axis of said bag, and said bag ports are positioned substantially perpendicular to said axis along an edge of said bag, and

a manifold assembly comprising a plurality of manifold ports and at least one common port, wherein each said chamber is in fluid communication with at least one said manifold port; and

a pump having an activating mechanism configured to activate said chambers to dispense said pharmacological agents from said bag,

whereby fluid flow within said bag occurs from each said chamber via an associated exit port, an associated conduit, an associated bag port, and an associated manifold port, to said common port.

16. A system according to claim 15, further comprising an administration set that receives the medication fluid from the bag at the predetermined pressure and delivers the medication fluid to an infusion site at a predetermined flow rate.

17. A system according to claim 19, wherein the administration set includes an air-eliminating filter for eliminating air bubbles form the medication fluid before delivery of the fluid to the infusion site.

18. A system according to claim 17, wherein said manifold comprises at least one back check valve associated with a respective chamber of the bag, wherein a hydraulic lock is formed between the back check valves and the air-eliminating filter, which lock is overcome upon the application of a threshold pressure on the chamber.

19. A system according to claim 16, wherein the administration set includes a micro-bore tubing having a length and an inner diameter that establishes the predetermined flow rate.

20. A system according to claim 15, wherein the activating mechanism generates a predetermined pressure in each chamber.

21. A system according to claim 15, wherein a configuration of the chamber(s) determines the pressure generated therein by the activating mechanism.

22. A system according to claim 15, wherein said activating mechanism comprises a constant force spring.

23. A system according to claim 15, wherein chambers in said bag are activated based on a predetermined configuration of said chambers.

24. A medication delivery system, comprising:

a bag comprising

a plurality of chambers comprising a plurality of pharmacological agents, each said chamber configured with a respective geometry, wherein said chamber configuration controls the volume of each pharmacological agent administered, the rate at which each pharmacological agent is administered, and the regimen with which said pharmacological agent is administered, and

a manifold; and

a pump having an activating mechanism configured to activate said chambers to dispense said pharmacological agents from said bag.

25. A system according to claim 24, further comprising an administration set that receives the medication fluid from the bag at the predetermined pressure and delivers the medication fluid to an infusion site at a predetermined flow rate.

26. A system according to claim 25, wherein the administration set includes a micro-bore tubing having a length and an inner diameter that establishes the predetermined flow rate.

27. A system according to claim 26, wherein the administration set includes an air-eliminating filter for eliminating air bubbles from the medication fluid before delivery of the fluid to the infusion site.

28. A system according to claim 24, wherein the activating mechanism generates a predetermined pressure in each chamber.

29. A system according to claim 24, wherein a configuration of the chamber(s) determines the pressure generated therein by the activating mechanism.

30. A system according to claim 24, wherein said activating mechanism comprises a constant force spring.

31. A method for delivering medication fluids, said method comprising:

compressing a bag having at least one chamber containing a medication fluid and a manifold using a constant force spring to generate a predetermined pressure in the chamber based on the chamber'"'"'s configuration;

wherein said manifold comprises at least one back check valve associated with a respective chamber of the bag, and

delivering the medication fluid from the bag at the predetermined pressure to an infusion site using an administration set comprising;

micro-bore tubing having a length and an inner diameter that establishes a predetermined flow rate, and

an air-eliminating filter, wherein a hydraulic lock is formed between the back check valve(s) of the manifold and the air-eliminating filter, which lock is overcome upon the application of a threshold pressure on the chamber.