INFUSION SYSTEM WITH DUAL-CHAMBERED RESERVOIR

• US 20140276415A1
• Filed: 03/15/2013
• Published: 09/18/2014
• Est. Priority Date: 03/15/2013
• Status: Active Grant

• Current Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Original Assignee: Carefusion 303 Incorporated (Becton, Dickinson & Co)
• Inventors: Davis, Lisa, Butterfield, Robert
• Granted Patent: US 9,498,574 B2
• Time in Patent Office: Days
• US Class Current: 604/150
• CPC Class Codes: A61M 2005/1402 Priming
• CPC Class Codes: A61M 2039/205 comprising air venting means
• CPC Class Codes: A61M 2205/3331 Pressure; Flow
• CPC Class Codes: A61M 2205/583 by visual feedback
• CPC Class Codes: A61M 2205/7536 allowing gas passage, but preventing liquid passage, e.g. liquophobic, hydrophobic, water-repellent membranes
• CPC Class Codes: A61M 39/20 Closure caps or plugs for connectors or open ends of tubes
• CPC Class Codes: A61M 5/14526 the piston being actuated by fluid pressure
• CPC Class Codes: A61M 5/14586 pressurised by means of a flexible diaphragm
• CPC Class Codes: A61M 5/14593 the diaphragm being actuated by fluid pressure
• CPC Class Codes: A61M 5/31515 Connection of piston with piston rod

Abstract

Described herein are medical fluid infusion systems for pumping a fluid to a patient, such as in a hospital environment. In one aspect, disclosed is an infusion system including a drive assembly having a drive fluid reservoir and a drive mechanism configured to apply a force to drive fluid from the drive fluid reservoir through a length of tubing. The infusion system includes a hydraulic assembly having a first fluid chamber having an inlet port configured to be in fluid communication with the length of tubing and a second fluid chamber having an outlet port configured to be in fluid communication with a patient extension set and a flexible movable divider sealing the first fluid chamber from the second fluid chamber. Related apparatus, systems, techniques and articles are also described.

Claims

1. An infusion system, comprising:

a drive assembly comprising;

a drive fluid reservoir; and

a drive mechanism configured to apply a force to drive fluid from the drive fluid reservoir through a length of tubing; and

a hydraulic assembly comprising;

a first fluid chamber having an inlet port configured to be in fluid communication with the drive fluid reservoir through the length of tubing;

a second fluid chamber having an outlet port configured to be in fluid communication with a patient extension set; and

a flexible movable divider sealing the first fluid chamber from the second fluid chamber.

2. The system of claim 1, wherein the force applied by the drive mechanism propels the fluid from the drive fluid reservoir through the length of tubing into the first fluid chamber to move the divider causing infusate to exit the second fluid chamber through the outlet port.

3. The system of claim 2, wherein the divider is slidingly positioned between the first fluid chamber located on a proximal side of the divider from the second fluid chamber located on a distal side of the divider.

4. The system of claim 3, wherein fluid propelled into the first fluid chamber moves the divider in a distal direction to deliver infusate contained in the second fluid chamber through the outlet port.

5. The system of claim 1, wherein the hydraulic assembly comprises a syringe assembly having a syringe barrel and the divider is positioned within the syringe barrel.

6. The system of claim 5, further comprising a plunger reversibly coupled to the divider and having a detachable handle.

7. The system of claim 5, further comprising a cap coupled to and sealing off a proximal end of the first fluid chamber.

8. The system of claim 7, wherein the cap comprises a stem portion configured to extend within and seal with an inner surface of the first fluid chamber.

9. The system of claim 7, wherein the inlet port extends through the cap.

10. The system of claim 7, wherein the cap further comprises a vent filter.

11. The system of claim 1, wherein the drive assembly further comprises one or more pressure sensors.

12. The system of claim 1, wherein the drive assembly further comprises one or more visual indicators providing information regarding operation of the system.

13. The system of claim 12, wherein the one or more visual indicators comprise one or more LEDs illuminating one or more components of the system.

14. The system of claim 13, wherein a color of the one or more LEDs indicates infusion status.

15. The system of claim 1, wherein the length of tubing is low-compliance tubing.

16. The system of claim 1, wherein the hydraulic assembly is reversibly coupled to the drive assembly.

17. The system of claim 1, wherein the patient extension set is less than at least about 6 inches.

18. The system of claim 1, wherein the patient extension set has a priming volume of less than about 0.7 mL.

19. The system of claim 1, wherein the hydraulic assembly comprises a bag formed by a first flexible layer, a second flexible layer and a third flexible layer, wherein perimeter sealing of the first and second flexible layers forms the first fluid chamber, and wherein perimeter sealing of the second and third flexible layers forms the second fluid chamber, and wherein the second flexible layer is the flexible movable divider.

20. The system of claim 19, wherein the hydraulic assembly further comprises a rigid, fixed volume housing inside which the bag is enclosed.

21. The system of claim 20, wherein the housing maintains a constant volume to the bag.