System and method for delivering a target volume of fluid

• US 9,713,667 B2
• Filed: 06/05/2014
• Issued: 07/25/2017
• Est. Priority Date: 04/11/2002
• Status: Active Grant

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Bryant, Jr., Robert J., Spencer, Geoffrey P., Distler, Carl R., Distler, Gregory L., Demers, Jason A.
• Primary Examiner(s): Mehta, Bhisma
• Assistant Examiner(s): SHAH, NILAY J
• Application Number:
  US14/297,183
• Publication Number:
  US 20140288488A1
• Time in Patent Office: 1,146 Days
• 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 pumping system for delivering a target volume of medical fluid, the system comprising:

a flow-control system unit;

a cassette mounted in the flow-control system unit;

the cassette having;

a first pump chamber configured to pump the medical fluid; and

a second pump chamber configured to pump the medical fluid; and

a controller in operative communication with the cassette to control the first and second pump chambers, wherein the controller is configured to;

deliver one or more strokes of the first and second pump chambers, each stroke delivering a first incremental volume, until a first volume of the medical fluid is delivered, and

deliver, using one of the first or second pump chambers, a second volume of the medical fluid in increments each having a second incremental volume, wherein the second incremental volume is less than the first incremental volume.

2. The system according to claim 1, wherein the second incremental volume is ⅓

of a finish volume.

3. The system according to claim 1, wherein the first volume approximately equals the target volume minus a finish volume.

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

5. The system according to claim 4, wherein the second incremental volume is ⅓

of the finish volume.

6. The system according to claim 1, further comprising a volume measurement system configured to measure the medical fluid discharged from the first and second pump chambers.

7. The system according to claim 1, further comprising a volume measurement system configured to monitor delivery of the first incremental volume and the second incremental volume.

8. The system according to claim 1, further comprising a volume measurement system configured to monitor each of the second incremental volumes after delivery of each of the second incremental volumes and communicate the delivered volumes to the controller, wherein the controller is configured to determine if another second incremental volume should be delivered.

9. The system according to claim 1, wherein when a cumulative volume of the medical fluid delivered is greater than a predetermined threshold, the controller uses one of the first and second pump chambers to deliver a plurality of sub-stroke volumes until the target volume is delivered.

10. The system according to claim 1, wherein the first and second pump chambers repeat coordinated pumping action until a remaining amount of the medical fluid to be delivered is less than a predetermined threshold and thereby the first volume of the medical fluid has been delivered.

11. The system according to claim 10, wherein once the first volume of the medical fluid is delivered, the controller enters into a targeting mode.

12. The system according to claim 1, wherein the first and second pump chambers are configured to deliver the medical fluid to a patient.

13. The system according to claim 1, wherein the first and second pump chambers are configured to deliver the medical fluid to a heater bag.

14. The system according to claim 1, wherein the first and second pump chambers are configured to deliver the medical fluid to a reservoir.

15. The system according to claim 1, wherein the first and second pump chambers are configured to deliver the medical fluid to a fluid container.

16. The system according to claim 1, wherein the controller carries out a process control and monitoring function for a fluid control module.

17. The system according to claim 1, wherein the controller enters into a low fill mode in response to a user selecting a low volume delivery mode on a user interface.

18. The system according to claim 1, wherein when a final first incremental volume is delivered, operation of the most recently used pump chamber of the first and second pump chambers halts and a volume measurement is performed.

19. The system according to claim 1, wherein the other one of the first and second pump chambers delivers the second volume of the medical fluid in the second volume increments.

20. The system according to claim 1, wherein a midpoint of a target volume tolerance range is reached during a last delivery of the second incremental volume.

21. The system according to claim 1, wherein the one of the first and second pump chambers that delivers less than the first incremental volume during the delivery of the first volume is acted on in a targeting mode by the controller.

22. The system according to claim 21, wherein the pump chamber acted on in the targeting mode delivers one or more of the second incremental volumes.

23. The system according to claim 22, wherein the second incremental volume is less than or equal to 3 milliliters of fluid.