Disposable cassette, delivery set and system for peritoneal dialysis

• US 5,989,423 A
• Filed: 09/10/1996
• Issued: 11/23/1999
• Est. Priority Date: 03/03/1993
• Status: Expired due to Term

• Current Assignee: Deka Products Limited Partnership
• Original Assignee: Deka Products Limited Partnership
• Inventors: Kamen, Dean, Vincent, Douglas E., Lanigan, Richard
• Primary Examiner(s): Kim, John
• Application Number:
  US08/709,864
• Time in Patent Office: 1,169 Days
• Field of Search: 210/646, 210/180, 210/258, 417/384, 417/385, 417/394, 417/395, 417/474, 417/475, 417/477.12, 417/478, 417/479, 604/29, 604/30, 604/65, 604/67
• US Class Current: 210/258
• CPC Class Codes: A61M 1/1524 the interface providing means for actuating on functional elements of the cassette, e.g. plungers
• CPC Class Codes: A61M 1/154 with sensing means or components thereof
• 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 1/1565 Details of valves
• CPC Class Codes: A61M 1/159 specially adapted for peritoneal dialysis
• CPC Class Codes: A61M 1/166 Heating for sterilisation A61M1/1686
• 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 2205/12 with interchangeable cassettes forming partially or totally the fluid circuit

Abstract

A disposable cassette for use in peritoneal dialysis includes a pair of diaphragms, tube connectors, pump chambers, channel paths, and valves. A disposable dialysate delivery set for use in peritoneal dialysis includes a cassette, multiple liquid flow paths, multiple valves, tube connectors, and disposable flexible plastic tubes to convey dialysate to and from the patient and other locations within the system. A system for performing peritoneal dialysis includes disposable supply containers of fresh dialysate, a cassette including a pump, a disposable heater container, and conduits for carrying fresh dialysate and carrying heated dialysate.

Claims

1. A disposable cassette for use in pumping dialysate to and from a heater reservoir, a patient and a drain;

said disposable cassette comprising;

a cassette having a front side and a back side;

a flexible, front diaphragm covering the front side of the cassette;

a flexible, back diaphragm covering the back side of the cassette;

a series of tube connectors having ports on the cassette to deliver dialysate to and from the heater reservoir and to and from the patient and to drain spent dialysate from the patient;

a plurality of pump cavities in the front side of the cassette covered by the front diaphragm to define pump chambers for pumping the dialysate;

a plurality of channel paths in the back side of the cassette covered by the back diaphragm for conveying dialysate between the tube connector ports and the pump chambers; and

a plurality of valve cavity walls in the front side of the cassette and covered by the front diaphragm to define valves and connected to the channel paths with the valves being operated between open and closed positions to route the flow of dialysate to and from the pump chambers;

wherein the cassette in normal use is substantially filled with dialysate.

2. A cassette in accordance with claim 1 wherein the valves and channel paths are congregated on one-half of the cassette adjacent the tube connectors, and the pump chambers are located on the other half of the cassette.

3. A disposable cassette for use in pumping dialysate to and from a heater reservoir, a patient and a drain;

said disposable cassette comprising;

a cassette having a front side and a back side;

a flexible, front diaphragm covering the front side of the cassette;

a flexible, back diaphragm covering the back side of the cassette;

a series of tube connectors having ports on the cassette to deliver dialysate to and from the heater reservoir and to and from the patient and to drain spent dialysate from the patient;

a plurality of pump cavities in the front side of the cassette covered by the front diaphragm to define pump chambers for pumping the dialysate;

a plurality of channel paths in the back side of the cassette covered by the back diaphragm for conveying dialysate between the tube connector ports and the pump chambers; and

a plurality of valve cavity walls in the front side of the cassette and covered by the front diaphragm to define valves and connected to the channel paths with the valves being operated between open and closed positions to route the flow of dialysate to and from the pump chambers;

wherein the cassette in normal use is substantially filled with dialysate;

wherein upper ports and lower ports are formed in the back side of the cassette and extend into upper and lower portions of the pump chambers.

4. A disposable cassette for use in pumping dialysate to and from a heater reservoir, a patient and a drain;

said disposable cassette comprising;

a cassette having a front side and a back side;

a flexible, front diaphragm covering the front side of the cassette;

a flexible, back diaphragm covering the back side of the cassette;

a series of tube connectors having ports on the cassette to deliver dialysate to and from the heater reservoir and to and from the patient and to drain spent dialysate from the patient;

a plurality of pump cavities in the front side of the cassette covered by the front diaphragm to define pump chambers for pumping the dialysate;

a plurality of channel paths in the back side of the cassette covered by the back diaphragm for conveying dialysate between the tube connector ports and the pump chambers; and

a plurality of valve cavity walls in the front side of the cassette and covered by the front diaphragm to define valves and connected to the channel paths with the valves being operated between open and closed positions to route the flow of dialysate to and from the pump chambers;

wherein the cassette in normal use is substantially filled with dialysate;

wherein the valve cavities and channel paths are congregated on one-half of the cassette adjacent the tube connectors, and the pump chambers are located on the other half of the cassette;

wherein an upper channel path extends from an upper heater tube connector across the top of one pump chamber to adjacent the top of the other pump chamber.

5. A disposable cassette for use in pumping dialysate to and from a heater reservoir, a patient and a drain;

said disposable cassette comprising;

a cassette having a front side and a back side;

a flexible, front diaphragm covering the front side of the cassette;

a flexible, back diaphragm covering the back side of the cassette;

a series of tube connectors having ports on the cassette to deliver dialysate to and from the heater reservoir and to and from the patient and to drain spent dialysate from the patient;

a plurality of pump cavities in the front side of the cassette covered by the front diaphragm to define pump chambers for pumping the dialysate;

a plurality of channel paths in the back side of the cassette covered by the back diaphragm for conveying dialysate between the tube connector ports and the pump chambers; and

a plurality of valve cavity walls in the front side of the cassette and covered by the front diaphragm to define valves and connected to the channel paths with the valves being operated between open and closed positions to route the flow of dialysate to and from the pump chambers;

wherein the cassette in normal use is substantially filled with dialysate;

wherein the valve cavities and channel paths are congregated on one-half of the cassette adjacent the tube connectors, and the pump chambers are located on the other half of the cassette;

wherein an upper channel path extends from an upper heater tube connector across the top of one pump chamber to adjacent the top of the other pump chamber;

wherein a lower channel extends substantially parallel to the upper channel path, and extends across the bottom of one pump chamber to adjacent the bottom of the other pump chamber.