SYSTEM AND METHOD FOR DELIVERING A TARGET VOLUME OF FLUID

• US 20140288490A1
• Filed: 06/05/2014
• Published: 09/25/2014
• Est. Priority Date: 04/11/2002
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Distler, Carl R., Distler, Gregory L., Demers, Jason A., Spencer, Geoffrey P., Bryant, Robert J. Jr.
• Granted Patent: US 9,561,317 B2
• Time in Patent Office: Days
• US Class Current: 604/29
• CPC Class Codes: A61M 1/155 with treatment-fluid pumping means or components thereof
• CPC Class Codes: A61M 1/1561 at least one cassette surface or portion thereof being flexible, e.g. the cassette having a rigid base portion with preformed channels and being covered with a foil
• CPC Class Codes: A61M 1/1562 Details of incorporated reservoirs
• CPC Class Codes: A61M 1/1565 Details of valves
• CPC Class Codes: A61M 1/159 specially adapted for peritoneal dialysis
• CPC Class Codes: A61M 1/28 Peritoneal dialysis ; Other peritoneal treatment, e.g. oxygenation
• CPC Class Codes: A61M 1/281 Instillation other than by gravity
• CPC Class Codes: A61M 1/282 Operational modes
• CPC Class Codes: A61M 2205/123 with incorporated reservoirs
• CPC Class Codes: A61M 2205/128 with incorporated valves
• CPC Class Codes: A61M 2205/3396 Reservoirs being alternately filled and emptied for measuring flow rate or delivered volume
• CPC Class Codes: A61M 2210/1017 Peritoneal cavity
• CPC Class Codes: A61M 39/22 Valves or arrangement of valves A61M39/02, A61M39/0247, A61M39/16 take precedence; regulating valves in infusion systems A61M5/16881; in devices worn by the patient for the reception of urine, faeces, catamenial or other discharge, or in colostomy devices A61F5/4405
• CPC Class Codes: A61M 5/16804 Flow controllers
• CPC Class Codes: A61M 5/16827 controlling delivery of multiple fluids, e.g. sequencing, mixing or via separate flow-paths infusion of multiple fluids without using a controller A61M5/1407
• CPC Class Codes: A61M 5/16831 Monitoring, detecting, signalling or eliminating infusion flow anomalies low-level float-valves causing cut-off A61M5/40; indicating or recording presence, absence or direction of flow in general G01P13/0066
• CPC Class Codes: A61M 5/16881 Regulating valves on-off valves, e.g. clamps A61M39/28

Abstract

A method for delivering a target volume of fluid to a destination is provided. The method includes delivering a first volume of fluid to the destination in increments each having approximately a first incremental volume, the first volume of fluid being less than the target volume and delivering a second volume of fluid to the destination in increments each having approximately a second incremental volume, the second incremental volume being less than the first incremental volume, such that the sum of the first volume and the second volume is approximately equal to the target volume.

Claims

1. (canceled)

2. A dialysis system for delivering a target volume of fluid to a destination, the system comprising:

a user interface, the user interface configured to allow user selection of a mode from a plurality of user selectable modes, one of the plurality of user selectable modes being a low volume delivery mode which limits the target volume to a predetermined range;

a flow control module configured to pneumatically act on a delivery set to direct fluid flow through the delivery set, the delivery set having one or more pumping chamber and valve arrangement for controlling fluid communications throughout the system; and

a controller configured for controlling the volume of fluid delivered to the destination, controlling the valve arrangement, and controlling the fluid control module, the configured for executing each of the plurality of delivery modes,

wherein when in the low volume delivery mode, the controller is configured to command the flow control module to deliver a first volume of fluid to the destination and a second volume of fluid to the destination, the sum of the first volume of fluid and the second volume of fluid approximately equal to the target volume, and the controller is configured to command the flow control module to deliver the first volume of fluid in increments each having approximately a first incremental volume, and for delivering the second volume of fluid to the destination in increments each having approximately a second incremental volume, the second incremental volume being less than the first incremental volume.

3. The dialysis system of claim 2, wherein the predetermined range is chosen from values between 40 ml and 1200 ml.

4. The dialysis system of claim 2, wherein the predetermined range is between 60 ml and 1000 ml.

5. The dialysis system of claim 2, wherein the delivery set includes at least a first pumping chamber and a second pumping chamber, each of the first pumping chamber and second pumping chamber including a flexible membrane.

6. The dialysis system of claim 2, wherein the user interface includes a control pad, the control pad configured for use by a user to navigate and select one of the plurality of user selectable modes.

7. The dialysis system of claim 6, wherein the control pad includes a key or a keypad.

8. The dialysis system of claim 2, wherein the user interface includes a display.

9. The system of claim 2, wherein the destination is a mammalian subject.

10. The system of claim 2, wherein the destination is the peritoneum of a mammalian subject.

11. The system of claim 2, wherein the destination is an anatomical cavity of a mammalian subject.

12. A dialysis system for delivering a target volume of fluid to a destination, said system comprising:

a flow control module configured to act upon a delivery set to deliver fluid; and

a controller configured to control the flow control module, the controller configured control the flow control module in each of a plurality of delivery modes, the delivery modes being selectable via an interface configured to allow a selection of a desired delivery mode from the plurality of delivery modes, the plurality of delivery modes including a low volume delivery mode,

wherein when in the low volume delivery mode, the controller is configured to command the flow control module to deliver a first volume of fluid to the destination and a second volume of fluid to the destination, the sum of the first volume of fluid and the second volume of fluid approximately equal to the target volume, the controller is configured to command the flow control module to deliver the first volume of fluid in increments each having approximately a first incremental volume, and for delivering the second volume of fluid to the destination in increments each having approximately a second incremental volume, the second incremental volume being less than the first incremental volume.

13. The system of claim 12, wherein the flow control module is configured to pneumatically act upon the delivery set.

14. The system of claim 12, wherein the flow control module includes at least one pressure reservoir.

15. The system of claim 14, wherein the flow control module includes at least a positive pressure reservoir and a negative pressure reservoir.

16. The system of claim 12, wherein the delivery set includes a cassette.

17. The system of claim 12, wherein the delivery set includes a first pumping chamber and second pumping chamber.

18. The system of claim 12, wherein the delivery set includes a valve arrangement for controlling fluid communication throughout the system.

19. The system of claim 12, wherein the controller is configured for controlling the volume of fluid delivered to the destination.

20. The system of claim 18, wherein the controller is further configured for controlling the valve arrangement.

21. The system of claim 12, wherein the low volume delivery mode limits the target volume to a predetermined range.

22. The system of claim 21, wherein the predetermined range is chosen from values between 40 ml and 1200 ml.

23. The system of claim 21, wherein the predetermined range is 60 ml-1000 ml.

24. The system of claim 12, wherein the interface includes a control pad, the control pad configured for use by a user to navigate and select one of the plurality of selectable modes.

25. The system of claim 24, wherein the control pad includes a key or keypad.

26. The system of claim 12, wherein the interface includes a display.

27. The system of claim 12, wherein the dialysis system is a peritoneal dialysis system.

28. The system of claim 12, wherein the system measures volume delivered with a volume measurement system.

29. The system of claim 21, wherein the volume measurement system includes a pressure transducer.

30. The system of claim 12, wherein the system further comprises a volume measuring means, the volume measuring means configured to measure volume delivered.

31. A dialysis system for delivering a target volume of fluid to a destination, the system comprising:

A flow control module configured to pneumatically act on a delivery set to direct fluid flow through the delivery set, the delivery set having at least a first pumping chamber having a first chamber volume, second pumping chamber having a second chamber volume, and valve arrangement for controlling fluid communications throughout the system;

A controller configured for controlling the volume of fluid delivered to the destination, controlling the valve arrangement, and controlling the fluid control module, the controller configured to operate in;

A first mode to command the flow control module to conduct a number of pumping strokes to pump fluid from the first or second pumping chamber, each pumping stroke delivering approximately the respective volume of the first pumping chamber or second pumping chamber; and

A targeting mode, the targeting mode to command the flow control module to perform one or more targeting stroke, each targeting stroke delivering a predetermined portion of the respective volume of the first pumping chamber or second pumping chamber;

Wherein the predetermined portion delivered by each targeting stroke is less than the volume delivered with a pumping stroke.

32. The system of claim 31, wherein the system measures volume delivered from the first pumping chamber and second pumping chamber with a volume measurement system.

33. The system of claim 32, wherein the volume measurement system includes a pressure transducer.

34. The system of claim 31, wherein the flow control module includes one or more pressure reservoir.

35. The system of claim 34, wherein the flow control module includes at least a positive pressure reservoir and a negative pressure reservoir.

36. The system of claim 35, wherein the anatomical cavity is the peritoneum.

37. The system of claim 31, wherein the first mode is further configured to conduct pumping strokes such that each of the first pumping chamber and second pumping chamber fill and deliver in sync.

38. The system of claim 31, wherein the controller is further configured to monitor a cumulative delivery volume and switch from the first mode to the targeting mode upon determination that the cumulative volume exhibits a predetermined characteristic.

39. The system of claim 38, wherein the controller is further configured to separately measure volume pumped through each of the first pumping chamber and the second pumping chamber.

40. The system of claim 39, wherein upon the determination that the cumulative volume exhibits the predetermined characteristic, the flow control module begins performing targeting strokes on whichever of the first or second pumping chamber has delivered the least amount of fluid.

41. The system of claim 38, wherein the predetermined characteristic of the cumulative volume is a characteristic in which the cumulative volume is within a predetermined range of the target volume.

42. The system of claim 31, wherein the first pumping chamber and second pumping chamber each comprise a flexible membrane.

43. The system of claim 31, wherein the system is a peritoneal dialysis system.

44. The system of claim 31, wherein the system further comprises a volume measuring means, the volume measuring means configured to measure volume delivered from the first pumping chamber and second pumping chamber.

45. A dialysis system for delivering a target volume of fluid to a destination, the system comprising:

A flow control module configured to act on a delivery set to deliver fluid;

A controller configured for controlling the fluid control module, the controller configured to operate in;

A first mode to command the flow control module to conduct a number of pumping strokes to pump fluid from a first pumping chamber or a second pumping chamber of the delivery set, each pumping stroke delivering approximately the respective volume of the first pumping chamber or second pumping chamber, the first mode configured to monitor a cumulative delivery volume and switch to a targeting mode upon determination that the cumulative volume exhibits a predetermined characteristic;

Wherein the targeting mode commands the flow control module to perform one or more targeting stroke until the target volume has been approximately delivered, each targeting stroke delivering a predetermined portion of the respective volume of the first pumping chamber or second pumping chamber, the predetermined portion delivered by each targeting stroke being less than the volume delivered with a pumping stroke.

46. The system of claim 45, wherein the one or more targeting stroke is performed on a single pump chamber of the first pump chamber and the second pump chamber.

47. The system of claim 46, wherein the single chamber of the first pumping chamber and second pumping chamber is the pumping chamber to have delivered the least fluid.

48. The system of claim 45, wherein the predetermined characteristic of the cumulative volume is a characteristic in which the cumulative volume is within a predetermined range of the target volume.

49. The system of claim 45, wherein the cumulative volume delivered by the one or more targeting strokes is less than the cumulative volume delivered by the number of pumping strokes.

50. The system of claim 45, wherein the flow control module pneumatically acts upon the delivery set to deliver fluid.

51. The system of claim 45, wherein the flow control module includes a pressure reservoir.

52. The system of claim 45, wherein the flow control module includes a positive pressure reservoir and a negative pressure reservoir.

53. The system of claim 45, wherein the system is configured to measure volume delivered from the first pumping chamber and second pumping chamber via a volume measurement system.

54. The system of claim 53, wherein the volume measurement system includes a pressure transducer.

55. The system of claim 45, wherein when in the first mode the controller is configured to conduct the number of pumping strokes such that each of the first pumping chamber and second pumping chamber fill and deliver in sync.

56. The system of claim 45, wherein the delivery set includes a valve arrangement for controlling fluid communication throughout the system.

57. The system of claim 56, wherein the controller is further configured for controlling the valve arrangement.

58. The system of claim 45, wherein the controller is configured for controlling the volume of fluid delivered to the destination.

59. A fluid pumping system for delivering a predetermined volume to a destination, said system comprising:

a user interface to input a predetermined volume within a range, wherein a sub range of the range corresponds to a low-volume mode;

a cassette with one or more pumping chambers configured to operate in accordance with the selected input,;

a volume measurement device in operative communication with the one or more pumping chamber and configured to estimate successive volumes of fluid that flow through the pumping chambers;

a controller configured to compare said delivered volume with the predetermined volume, said comparison decides a subsequent motion leading to operation of a single pumping chamber such that said single pumping chamber delivers said fluid in a volume that is less than each of said successive volumes of said outgoing fluid so as to achieve said predetermined volume in said destination.

60. The system according to claim 59, wherein the comparison is a function of the predetermined volume.

61. The system according to claim 60, wherein the comparison is whether another successive volume is greater than a remaining fluid to be infused to achieve the predetermined volume.