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

Patent metadata

Field	Value
Publication number	US-2017128652-A1
Application number	US-201615174969-A
Country	US
Kind code	A1
Filing date	Jun 6, 2016
Priority date	Jan 23, 2008
Publication date	May 11, 2017
Grant date	—

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.

First claim

1 .- 22 . (canceled)

23 . A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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 fluid that includes a channel, the body including a vacuum vent clearance depression formed adjacent the at least one pump chamber; a patient line port arranged for connection to a patient line, the patient line port being in fluid communication with the at least one pump chamber via at least one flowpath; a drain line port arranged for connection to a drain line, the drain line port being in fluid communication with the at least one pump chamber via at least one flowpath; and a flexible membrane attached to the first side of the body over the at least one pump chamber, a pump chamber portion of the membrane over the at least one pump chamber being arranged to be movable for movement of fluid in the pump chamber, wherein the vacuum vent clearance depression prevents contact of the membrane with the body in an area located over the vacuum vent clearance depression and extending at least partially over the pump chamber.

24 . The cassette of claim 23 , wherein the vacuum vent clearance depression extends outwards from the at least one pump chamber.

25 .- 46 . (canceled)

47 . A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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 fluid that includes a channel, the body including a vacuum vent clearance depression formed adjacent the at least one pump chamber, and the at least one pump chamber including one or more spacer elements that extend from an inner wall of the depression; a patient line port arranged for connection to a patient line for delivery of dialysate to the peritoneal cavity of a patient, the patient line port being in fluid communication with the at least one pump chamber via at least one flowpath; and a membrane attached to the first side of the body over the at least one pump chamber, being arranged to be movable for movement of fluid in the pump chamber, wherein the vacuum vent clearance depression prevents contact of the membrane with the body in an area located over the vacuum vent clearance depression and extending at least partially over the pump chamber, wherein the spacer elements help prevent contact of the membrane with the inner wall of the body in the pump chamber when the pump chamber portion is moved into contact with the spacer elements, and wherein the spacer elements are arranged to minimize deformation of the membrane at edges of the spacer elements when the membrane is forced against the spacer elements.

48 .- 72 . (canceled)

73 . A fluid handling cassette for use with a fluid handling system of a medical infusion device, the cassette comprising:
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 fluid that includes a channel, the body including a vacuum vent clearance depression formed adjacent the at least one pump chamber; a patient line port arranged for connection to a patient line, the patient line port being in fluid communication with the at least one pump chamber via at least one flowpath; a drain line port arranged for connection to a drain line, the drain line port being in fluid communication with the at least one pump chamber via at least one flowpath; a plurality of solution line spikes being in fluid communication with the at least one pump chamber via at least one flowpath; and a flexible membrane attached to the first side of the body over the at least one pump chamber, a pump chamber portion of the membrane over the at least one pump chamber being arranged to be movable for movement of fluid in the pump chamber, wherein the vacuum vent clearance depression prevents contact of the membrane with the body in an area located over the vacuum vent clearance depression and extending at least partially over the pump chamber.

74 .- 75 . (canceled)

76 . The cassette of claim 73 , further comprising:
a heater bag line port located at a first end of the body arranged for connection to a heater bag line, the heater bag line port being in fluid communication with the at least one pump chamber via at least one flowpath; wherein the patient line port and drain line port are also located at the 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.

77 . The cassette of claim 76 , further comprising flexible patient, drain and heater bag lines respectively connected to the patient line port, drain line port and heater bag line port.

78 . The cassette of claim 77 , wherein the flexible patient, drain and heater bag lines are arranged to be pinched by an occluder pinch head to occlude flow in the patient, drain and heater bag lines.

79 . The cassette of claim 76 , wherein the drain line port and the heater bag line port communicate with a common flowpath channel of the base.

80 . The cassette of claim 73 , further comprising:
a plurality of valves that are each arranged to control flow in a respective flowpath between the at least one pump chamber and the patient line port, the drain line port, and the plurality of solution line spikes.

81 . The cassette of claim 80 , wherein portions of the membrane are positioned over respective valves and are movable to open and close the respective valve.

82 . The cassette of claim 73 , wherein the plurality of solution line spikes communicate with a common flowpath channel of the base.

83 .- 86 . (canceled)

87 . The cassette of claim 73 , wherein the membrane includes a pump chamber portion that has a shape that generally conforms to the useable area of the pump chamber depression in the body.

88 . The cassette of claim 73 , wherein the body includes two pump chambers that are each formed as a depression in the body.

89 . The cassette of claim 73 , wherein at least one pump chamber includes one or more spacer elements that helps prevent contact of the membrane with an inner wall of the body in the pump chamber.

90 . The cassette of claim 89 , wherein the spacer elements are arranged to minimize deformation of the membrane at edges of the spacer elements when the membrane is forced against the spacer elements.

91 .- 100 . (canceled)

101 . The cassette of claim 23 , wherein the vacuum vent clearance depression is configured to allow a vacuum vent port of a base unit of the peritoneal dialysis system to remove air or fluid between the flexible membrane and a control surface of the base unit when the fluid handling cassette is installed in the base unit.

102 . The cassette of claim 47 , wherein the vacuum vent clearance depression is configured to allow a vacuum vent port of a base unit of the peritoneal dialysis system to remove air or fluid between the flexible membrane and a control surface of the base unit when the fluid handling cassette is installed in the base unit.

103 . The cassette of claim 73 , wherein the vacuum vent clearance depression is configured to allow a vacuum vent port of the medical infusion device to remove air or fluid between the flexible membrane and a control surface of the medical infusion device when the fluid handling

Assignees

• Deka Products Lp

Inventors

• Mcgill David W
• Dale James D
• Helmore Simon C
• Lanigan Richard J
• Demers Jason A
• Kamen Dean

Classifications

• F04B43/073

  the actuating fluid being controlled by at least one valve · CPC title

• F04B53/22

  Arrangements for enabling ready assembly or disassembly · CPC title

• F04B43/0054

  particularities of the flexible members · CPC title

• A61M2205/6036

  characterised by physical shape, e.g. array of activating switches · CPC title

• G16H40/63

  for local operation · CPC title