System and method for delivering a target volume of fluid

• US 7,544,179 B2
• Filed: 04/10/2003
• Issued: 06/09/2009
• Est. Priority Date: 04/11/2002
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Bryant, Robert, Distler, Carl Ray, Spencer, Geoffrey, Distler, Gregory Lee, Demers, Jason A.
• Primary Examiner(s): Lucchesi; Nicholas D
• Assistant Examiner(s): KOHARSKI, CHRISTOPHER
• Application Number:
  US10/412,658
• Publication Number:
  US 20030220627A1
• Time in Patent Office: 2,252 Days
• Field of Search: 604/19, 604/34, 604/27, 604/82, 604 65- 67, 604/85, 604/249, 604/250, 128/DIG.12
• US Class Current: 604/67
• 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. A system for delivering a target volume of fluid to a destination, the target volume being approximately the sum of a first volume of fluid and a second volume of fluid, comprising:

a fluid control module for delivering the first volume of fluid to the destination 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;

a valve arrangement for controlling fluid communication to the destination; and

a controller for determining the volume of fluid delivered to the destination and for controlling the valve arrangement and the fluid control module, the controller having computer readable program code comprising;

program code for calculating the first volume of fluid delivered and the second volume of fluid delivered to the destination,

program code for suspending delivery of the first volume of fluid to the destination when the first volume of fluid delivered exceeds the second volume of fluid delivered by a predetermined fraction of the first incremental volume, and

program code for resuming delivery of the first volume of fluid to the destination after further delivery of the second volume of fluid.

2. A system according to claim 1, wherein the fluid control module is configured to deliver the first and second volumes of fluid to a human subject.

3. A system according to claim 2, wherein the fluid control module is configured to deliver the first and second volumes of fluid parenterally.

4. A system according to claim 1, wherein the fluid control module delivers the first and second volumes of fluid to a fluid reservoir.

5. A system according to claim 1, wherein the fluid control module delivers the first and second volumes of fluid to a container.

6. A system according to claim 5, wherein the container is a heating bag.

7. A system according to claim 5, wherein the container is a pump chamber.

8. A system according to claim 1, wherein the first volume is approximately equal to the target volume minus a finish volume.

9. A system according to claim 8, wherein the second incremental volume is less than the finish volume.

10. A system according to claim 8, wherein the second incremental volume is less than one third the finish volume.

11. A system for simultaneously delivering a target volume of fluid from two sources in a desired ratio to a common destination, the system comprising:

a first fluid source;

a second fluid source;

a fluid control module for delivering a first volume of fluid from the first fluid source and a second volume of fluid from the second fluid source to the destination in increments each having approximately a first incremental volume, the first incremental volume being substantially less than the target volume, and for measuring the volume of fluid delivered to the destination from the first source and the volume of fluid delivered to the destination from the second source;

a valve arrangement for controlling fluid communication between the destination and the first and second fluid sources; and

a controller for determining the first and second volumes of fluid, the first incremental volume of fluid, and for controlling the valve arrangement and the fluid control module, the controller having computer readable program code comprising;

program code for calculating the first and second volumes of fluid delivered to the destination,

program code for suspending delivery of the first volume of fluid to the destination when the first volume delivered exceeds the second volume delivered by a predetermined fraction of the first incremental volume, and

program code for resuming delivery of the first volume of fluid to the destination after further delivery of fluid from the second fluid source.

12. A system according to claim 11, wherein the first incremental volume is less than one quarter of the target volume.

13. A system according to claim 11, wherein the desired ratio is 1:

1.

14. A system according to claim 13, wherein the predetermined fraction is approximately one half.

15. A system according to claim 11, wherein the fluid control module is configured to deliver the first and second volumes of fluid to a human subject.

16. A system according to claim 15, wherein the fluid control module is configured to deliver the first and second volumes of fluid parenterally.

17. A system according to claim 11, wherein the fluid control module delivers the first and second volumes of fluid to a fluid reservoir.

18. A system according to claim 11, wherein the fluid control module delivers the first and second volumes of fluid to a container.

19. A system according to claim 18, wherein the container is a heating bag.

20. A system according to claim 18, wherein the container is a pump chamber.

21. A system for delivering a target volume of fluid from two sources in a desired ratio to a common destination, the system comprising:

a first fluid source;

a second fluid source;

a fluid control module for delivering a first volume of fluid from the first fluid source and a second volume of fluid from the second fluid source to the destination in increments each having approximately a first incremental volume, the first incremental volume being substantially less than the target volume, and for measuring the volume of fluid delivered to the destination from the first source and the volume of fluid delivered to the destination from the second source;

a valve arrangement for controlling fluid communication between the destination and the first and second fluid sources; and

a controller for determining the first and second volumes of fluid, the first incremental volume of fluid, and for controlling the valve arrangement and the fluid control module, the controller having computer readable program comprising;

program code for calculating the first and second volumes of fluid delivered to the destination,

program code for calculating that approximately the target volume minus a finish volume of fluid has been delivered to the destination;

program code for calculating the volume of fluid delivered to the destination from the first source and the volume of fluid delivered to the destination from the second source; and

program code for delivering a third volume of fluid from the source that has delivered a smaller volume of fluid to the destination, said delivery of a third volume occurring in increments each having approximately a second incremental volume, wherein the second incremental volume is less than the first incremental volume, such that the volume of fluid delivered to the destination from the first source and the volume of fluid delivered from the second source are in approximately the desired ratio.

22. A system according to claim 21, wherein the sum of the first volume delivered and the second volume delivered is approximately equal to the target volume minus the finish volume.

23. A system according to claim 22, wherein the second incremental volume is less than the finish volume.

24. A system according to claim 22, wherein the second incremental volume is less than one third the finish volume.

25. A system for delivering a target volume of fluid to a destination comprising:

fluid delivery means for delivering a first volume of fluid to the destination in one or more first incremental volumes, the first volume of fluid being less than the target volume, and for delivering a second volume of fluid to the destination in one or more second incremental volumes, the second incremental volume being less than the first incremental volume;

measuring means for measuring the first volume of fluid and the second volume of fluid delivered to the destination;

control means for controlling the fluid delivery means; and

control means for suspending delivery of the first volume of fluid to the destination when the measured first volume exceeds by a fraction of the first incremental volume an amount required to maintain a desired ratio with respect to the second volume, and for resuming delivery of the first volume of fluid to the destination after further delivery of the second volume of fluid.

26. A system for simultaneously delivering a target volume of fluid from two sources in a desired ratio to a common destination, the system comprising:

a first fluid source;

a second fluid source;

fluid delivery means for delivering a first volume of fluid from the first fluid source and a second volume of fluid from the second fluid source to the destination in one or more first incremental volumes, the first incremental volume being substantially less than the target volume;

measuring means for measuring the volume of fluid delivered to the destination from the first source and the volume of fluid delivered to the destination from the second source; and

control means for suspending delivery of the first volume of fluid to the destination when the measured first volume exceeds an amount needed to maintain the desired ratio with respect to the second volume by a fraction of the first incremental volume, and for resuming delivery of the first volume of fluid to the destination after further delivery of the second volume of fluid.

27. A system for simultaneously delivering a target volume of fluid from two sources in a desired ratio to a common destination, the system comprising:

a first fluid source;

a second fluid source;

fluid delivery means for delivering a first volume of fluid from the first fluid source and a second volume of fluid from the second fluid source to the destination in one or more first incremental volumes, the first incremental volume being substantially less than the target volume;

measuring means for measuring the volume of fluid delivered to the destination from the first source and the volume of fluid delivered to the destination from the second source; and

control means for suspending delivery of the first volume of fluid to the destination when the measured first volume exceeds the measured second volume by a predetermined fraction of the first incremental volume, and for resuming delivery of the first volume of fluid to the destination after further delivery of the second volume of fluid.

28. A system according to claim 27, wherein the desired ratio is 1:

1.

29. A system according to claim 28, wherein the predetermined fraction is approximately one half.