System and Method for Delivering a Target Volume of Fluid

• US 20080114330A1
• Filed: 10/29/2007
• Published: 05/15/2008
• Est. Priority Date: 04/11/2002
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Demers, Jason A., Bryant, Robert, Distler, Carl Ray, Spencer, Geoffrey, Distler, Gregory Lee
• Granted Patent: US 8,821,475 B2
• Time in Patent Office: Days
• US Class Current: 604/506
• 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 method for delivering a target volume of fluid to a destination, the method comprising:

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.

2. A method according to claim 1, wherein delivering the first and second volumes of fluid to a destination includes delivering the first and second volumes of fluid parenterally to a human subject.

3. A method according to claim 1 wherein the first volume is approximately equal to the target volume minus a finish volume.

4. A method according to claim 3, wherein the second incremental volume is less than the finish volume.

5. A method according to claim 3, wherein the second incremental volume is less than one third the finish volume.

6. A method according to claim 1, wherein delivering the first volume and second volumes of fluid to a destination includes delivering the first and second volumes of fluid to a fluid reservoir.

7. A method according to claim 1, wherein delivering the first and second volumes of fluid to a destination includes delivering the first and second volumes of fluid to container.

8. A method according to claim 7, wherein the container is a heating bag.

9. A method according to claim 7, wherein the container is a pump chamber.

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

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

after delivery of a first incremental volume of fluid from the first source and the second source, 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;

suspending delivery of the first volume of fluid to the destination when the first volume exceeds the second volume by a predetermined fraction of the first incremental volume;

delivering a first incremental volume of fluid from the second source; and

resuming delivery of the first volume of fluid to the destination.

11. A method according to claim 10, wherein the first incremental value is less than one quarter of the target value.

12. A method according to claim 10, wherein the desired ration is 1:

1.

13. A method according to claim 12, wherein the predetermined fraction is one half.

14. A method according to claim 10, wherein delivering the first and second volumes of fluid to a destination includes delivering the first and second volumes of fluid parenterally to a human subject.

15. A method according to claim 10, wherein delivering the first volume and second volumes of fluid to a destination includes delivering the first and second volumes of fluid to a fluid reservoir.

16. A method according to claim 10, wherein delivering the first and second volumes of fluid to a destination includes delivering the first and second volumes of fluid to container.

17. A method according to claim 16, wherein the container is a heating bag.

18. A method according to claim 16, wherein the container is a pump chamber.

19. A method according to claim 10, further comprising:

determining that approximately the target volume of fluid has been delivered to the destination;

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

delivering a third volume of fluid from the source that has delivered a smaller 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 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.

20. A method according to claim 19, wherein the sum of the first volume and the second volume is approximately equal to the target volume minus a finish volume.

21. A method according to claim 20, wherein the second incremental volume is less than the finish volume.

22. A method according to claim 20, wherein the second incremental volume is less than one third the finish volume.