Medical treatment system and methods using a plurality of fluid lines

Patent metadata

Field	Value
Publication number	US-11965766-B2
Application number	US-201916384082-A
Country	US
Kind code	B2
Filing date	Apr 15, 2019
Priority date	Apr 17, 2018
Publication date	Apr 23, 2024
Grant date	Apr 23, 2024

Abstract

A system including a pumping cassette having a first side including number of valve wells and second side having a fluid bus. Each side may be covered by a flexible membrane. A control surface having a number of valve well control stations actuatable with respect to the flexible membrane covering the first side of the cassette to open and close the valve wells when the cassette is mated against the control surface may be included. A pressure distribution assembly having a positive and negative pressure source and a number of pneumatic valves may be included. A controller configured to selectively actuate the number of pneumatic valves to apply pressure against the valve well control stations in a valve pumping sequence until a volume displaced through the fluid bus of the pumping cassette from a source to a destination is within a range of a target volume may be included.

First claim

What is claimed is:

1. A method of determining a heightwise location of a component of interest relative to a pumping chamber of a fluid handling set, the method comprising:
establishing a flow path between the pumping chamber and the component of interest;
receiving, with a controller, first data from a pressure sensor indicative of pressure in the pumping chamber;
detecting, with the controller, a feature profile in the first data; and
determining, with the controller, the heightwise location of the component of interest using the first data and additional temporal data associated with the feature profile before the first data indicates that the pressure in the pumping chamber is stable.

2. The method of claim 1 , wherein the method further comprises actuating one or more pneumatic valves of a pressure distribution module to apply pressure to a control surface adjacent a portion of the fluid handling set including the pumping chamber to consequentially place the pumping chamber in an intermediary state between a fully filled and fully delivered state before establishing the path from the pumping chamber to the component of interest.

3. The method of claim 2 , wherein the intermediate state is a state that allows for the detection of a maximum positive and maximum negative head height of about the same absolute value.

4. The method of claim 1 , wherein the method further comprises actuating one or more pneumatic valves of a pressure distribution module to apply pressure to a control surface adjacent a portion of the fluid handling set defining the pumping chamber to consequentially place the pumping chamber in a negative head height detection biased state before establishing the path from the pumping chamber to the component of interest.

5. The method of claim 1 , wherein the method further comprises actuating one or more pneumatic valves of a pressure distribution module to apply pressure to a control surface adjacent a portion of the fluid handling set in which the pumping chamber is disposed to consequentially place the pumping chamber in a positive head height detection biased state before establishing the path from the pumping chamber to the component of interest.

6. The method of claim 1 , wherein the method further comprises comparing the determined heightwise location to an expected range and generating an error signal when the determined heightwise location is outside of the expected range.

7. The method of claim 1 , where the method further comprises using a behavior model.

8. The method of claim 7 , wherein the behavior model is based off an ideal second order under dampened system.

9. The method of claim 1 , wherein detecting the feature profile comprises detecting one or more pressure peaks.

10. The method of claim 1 , wherein detecting the feature profile comprises detecting a first pressure peak and a second pressure peak lower in magnitude than the first peak.

11. The method of claim 1 , wherein the method further comprises setting an adjusted pumping pressure value based on the heightwise location of the component of interest.

12. The method of claim 1 , wherein the method further comprises orchestrating pumping of fluid through a pumping cassette of the fluid handling set in which the pumping chamber is disposed via actuation of one or more pneumatic valves in a pressure distribution module to apply pressure to a control surface associated with a second pumping chamber in the pumping cassette while detecting the feature profile.

13. A method of determining a heightwise location of a reservoir relative to a pumping chamber of a fluid handling set, the method comprising:
establishing fluid communication between the pumping chamber and the reservoir;
receiving, with a controller, first data from a sensor indicative of pressure in the pumping chamber;
detecting, with the controller, pressure peaks in the first data; and
determining, with the controller, the heightwise location of the reservoir using the first data and an amount of time between the pressure peaks before the first data indicates that the pressure in the pumping chamber is stable.

14. A method of determining a heightwise location of a reservoir relative to a pumping chamber of a pumping cassette, the method comprising:
establishing a fluid communication between the pumping chamber and the reservoir;
receiving, with a controller, first data from a sensor indicative of pressure in the pumping chamber;
detecting, with the controller, a number of expected features in the first data; and
determining, with the controller, the heightwise location of the reservoir before the first data indicates that the pressure in the pumping chamber is stable based upon the first data and temporal characteristics of the number of expected features.

15. A method of determining a heightwise location of a reservoir relative to a pumping chamber of a pumping cassette, the method comprising:
establishing a fluid communication between the pumping chamber and the reservoir;
receiving, with a controller, first data from a sensor indicative of pressure in the pumping chamber;
detecting, with the controller, a feature profile in the first data; and
determining, with the controller, the heightwise location of the reservoir before the first data indicates that the pressure in the pumping chamber is stable based upon the first data and temporal data of the feature profile.

16. A method of determining heightwise location data for a reservoir's position relative to a pumping chamber of a pumping cassette, the method comprising:
establishing a fluid communication between the pumping chamber and the reservoir;
receiving, with a controller, first data from a sensor indicative of pressure in the pumping chamber;
detecting, with the controller, a feature profile in the first data; and
calculating, with the controller, a value indicative of the heightwise location of the reservoir before the first data indicates that the pressure in the pumping chamber is stable, based upon temporal characteristics of a set of expected features of the feature profile.

17. The method of claim 16 , wherein the method further comprises actuating one or more pneumatic valves of a pressure distribution module to apply pressure to a control surface adjacent a portion of the pumping cassette including the pumping chamber to place the pumping chamber in a predefined state before establishing fluid communication between the reservoir and pumping chamber.

18. The method of claim 17 , wherein the predefined state is one of an intermediary state that allows for the detection of a maximum positive and maximum negative head height of about the same absolute value, a negative head height detection biased state, and a positive head height detection biased state.

19. The method of claim 16 , wherein the method further comprises comparing the calculated value indicative of the heightwise location to an expected range and generating an error signal when the value is outside of the expected range.

20. The method of claim 16 , wherein detecting the feature profile comprises detecting one or more pressure peaks.

21. The method of claim 16 , wherein the method further comprises setting an adjusted pumping pressure value based on the value indicative of the heightwise location of the reservoir.

22. The method of claim 16 , wherein the method further comprises orchestrating pumping of fluid through the pumping cassette via actuation of one or more pneumatic valves in

Assignees

• Deka Products Lp

Inventors

• Karol Daniel S

Classifications

• A61M2205/122

  using evacuated interfaces to enhance contact · CPC title

• A61M2205/3331

  Pressure; Flow · CPC title

• A61M2205/121

  interface between cassette and base · CPC title

• A61M2205/12

  with interchangeable cassettes forming partially or totally the fluid circuit · CPC title

• A61M1/166

  Heating (for sterilisation A61M1/1686) · CPC title