IP Library › Granted Patent US 12,311,086
Granted Patent B2
US 12,311,086 · App. 18/512,005 · Granted May 27, 2025

Pump cassette and methods for use in medical treatment system using a plurality of fluid lines

Inventors: David W McGill (Woodstock, GA); James D. Dale (Milton, FL); Simon C. Helmore (San Francisco, CA); Richard J. Lanigan (Concord, NH); Jason A. Demers (Manchester, NH); Dean Kamen (Bedford, NH)
Assignee: DEKA Products Limited Partnership
A61M1/15A61M1/14A61M1/153A61M1/155A61M1/156A61M1/1562A61M1/1565A61M1/159A61M1/16A61M5/16809A61M5/44A61M5/445A61M1/1601A61M1/1623A61M1/1629A61M1/1631A61M1/166A61M1/1694A61M1/28A61M1/281A61M1/282A61M1/288A61M5/16813A61M5/16827A61M39/1011A61M39/105A61M2039/1066A61M39/20A61M39/28A61M39/281A61M2205/12A61M2205/121A61M2205/122A61M2205/123A61M2205/127A61M2205/128A61M2205/13A61M2205/14A61M2205/3306A61M2205/3331A61M2205/3334A61M2205/3379A61M2205/36A61M2205/502A61M2209/08A61M2210/1017F04B43/02F04B43/073F04B43/08F04B43/086Y02A90/10
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Quick Facts
Patent No.
US 12,311,086
App. No.
18/512,005
Granted
May 27, 2025
Kind
B2
Abstract

A fluid handling cassette, such as that useable with an automated peritoneal dialysis (APD) cycler device or other infusion apparatus, may include a generally planar body having at least one pump chamber formed as a depression in a first side of the body and a plurality of flowpaths for a fluid that includes a channel. A patient line port may be arranged for connection to a patient line and be in fluid communication with the at least one pump chamber via at least a first one of said flowpaths, and an optional membrane may be attached to the first side of the body over the at least one pump chamber. In one embodiment, the membrane may have a pump chamber portion with an unstressed shape that generally conforms to the depression of the at least one pump chamber in the body and is arranged to be movable for movement of the fluid in a useable space of the at least one pump chamber. One or more spacers may be provided in the at least one pump chamber to prevent the membrane from contacting an inner wall of the at least one pump chamber. The patient line, a drain line, and/or a heater bag line may be positioned to be separately occludable in relation to one or more solution lines that are connectable to the cassette.

Claims (24)

1. A dialysate delivery set comprising:

a fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:

a generally planar body having a first pump chamber and a second pump chamber formed as a depression in a first side of the body and having a first opening and a second opening fluidly connected to a first common channel and a second common channel, respectively;

a patient line port arranged for connection to a patient line for delivering dialysate to a peritoneal cavity of a patient, the patient line port being in fluid communication with the first pump chamber and the second pump chamber via the second common channel;

a drain line port arranged for connection to a drain line for draining the dialysate from the peritoneal cavity of the patient, the drain line port being in fluid communication with the first pump chamber and the second pump chamber via the first common channel;

a heater bag line port arranged for connection to a heater bag line, the heater bag line port in fluid communication with the first pump chamber and the second pump chamber via the first common channel;

a plurality of solution line spikes being in fluid communication with the first pump chamber and the second pump chamber via the second common channel; and

a flexible membrane attached to the first side of the body over the first pump chamber and the second pump chamber, a pump chamber portion of the membrane over the first pump chamber and the second pump chamber being arranged to be movable for movement of fluid in the first pump chamber and the second pump chamber;

the patient line fluidly connected to the patient line port;

the drain line fluidly connected to the drain line port; and

a heater bag and the heater bag line fluidly connected to the heater bag line port.

2. The delivery set of claim 1 , wherein the cassette further comprises a plurality of valve wells on the first side of the body, each valve well of the plurality of valve wells having a valve port connecting each respective valve well of the plurality of valve wells to a second side of the body opposite the first side.

3. The delivery set of claim 2 , wherein the plurality of valve wells includes a first group of valve wells and the patient line port, the drain line port, and the heater bag line port are each fluidly connected to either the first common channel or the second common channel by a unique valve well of the first group of valve wells.

4. The delivery set of claim 3 , wherein the plurality of valve wells includes a second group of valve wells and the first opening and the second opening of the first pump chamber and the second pump chamber are each fluidly connected to either the first common channel or the second common channel by a unique valve well of the second group of valve wells.

5. The delivery set of claim 4 , wherein the plurality of valve wells includes a third group of valve wells connected between the plurality of solution line spikes and the second common channel.

6. The delivery set of claim 5 , wherein portions of the flexible membrane are movable to open and close the valve port of each valve well of the plurality of valve wells.

7. The delivery set of claim 6 , wherein the first common channel and the second common channel are on the second side of the body opposite the first side.

8. The delivery set of claim 7 , wherein the cassette further comprises a second membrane attached to the second side of the body and defining the first common channel and the second common channel with the body.

9. The delivery set of claim 1 , wherein the patient line port, the heater bag line port and the drain line port are located at a first end of the body, and the plurality of solution line spikes are located at a second end of the body opposite the first end.

10. The delivery set of claim 1 , wherein the patient line, the drain line and the heater bag line are arranged to be pinched by an occluder pinch head to occlude flow in the patient line, the drain line and the heater bag line.

11. The delivery set of claim 1 , wherein the pump chamber portion has a shape that generally conforms to a useable area of the depression in the body.

12. The delivery set of claim 1 , wherein at least one of the first pump chamber and the second pump chamber includes one or more spacer elements that help prevent contact of the membrane with an inner wall of the body in the at least one of the first pump chamber and the second pump chamber.

13. The delivery set of claim 12 , wherein the one or more spacer elements are arranged to minimize deformation of the membrane at edges of the one or more spacer elements when the membrane is forced against the one or more spacer elements.

14. The delivery set of claim 1 , further comprising a plurality of spike caps that sealingly cover a corresponding solution line spike of the plurality of solution line spikes.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Dec 6, 2023
From: MCGILL, DAVID W.; DALE, JAMES D.; HELMORE, SIMON C.; LANIGAN, RICHARD J.; DEMERS, JASON A.; KAMEN, DEAN
To: DEKA PRODUCTS LIMITED PARTNERSHIP
Reel/Frame 065780/0695 →
Continuity (8)
Continuation 17975495 · Oct 27, 2022
Continuation 16507302 · Jul 10, 2019
Continuation 16391104 · Apr 22, 2019
Division 15174969 · Jun 6, 2016
Division 12864378
Provisional Application 61058469 · Jun 3, 2008
Provisional Application 61011967 · Jan 23, 2008
Related Publication 20240157036A1 · May 16, 2024
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