PUMP CASSETTE AND METHODS FOR USE IN MEDICAL TREATMENT SYSTEM USING A PLURALITY OF FLUID LINES
1 Assignment
0 Petitions
Accused Products
Abstract
A fluid handling cassette (24), such as that useable with an APD cycler device or other infusion apparatus, may include a generally planar body having at least one pump chamber (181) formed as a depression in a first side of the body and a plurality of flowpaths for fluid that includes a channel. A patient line port may be arranged for connection to a patient line (34) and be in fluid communication with the at least one pump chamber via at least one flowpath, and an optional membrane (15) 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 (151) with an unstressed shape that generally conforms to the pump chamber depression in the body and is arranged to be movable for movement of fluid in the useable space of the pump chamber. One or more spacers (50) may be provided in the pump chamber to prevent a pump membrane from contacting an inner wall of the pump chamber. Patient, drain (28) and/or heater bag lines (26) may be positioned to be separately occludable in relation to one or more solution lines (30) that are connectable to the cassette.
219 Citations
100 Claims
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1-12. -12. (canceled)
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13. A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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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 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 the patient, 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 for removal of dialysate from the peritoneal cavity of the patient, 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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22)
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23. A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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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. - View Dependent Claims (24)
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25-46. -46. (canceled)
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47. A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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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 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 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.
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48. A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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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 at least one pump chamber including a plurality of spacer elements that extend from an inner wall of the depression to different extents; 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 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.
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49. (canceled)
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50. A fluid handling cassette for use in a peritoneal dialysis system, the cassette comprising:
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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 at least one pump chamber including one or more spacer elements that extend from an inner wall of the depression and including a fluid outlet; 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; 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 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 spacer element is configured to inhibit the membrane from covering the fluid outlet.
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51-62. -62. (canceled)
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63. A fluid handling cassette for use with a fluid handling system of a medical infusion device, the cassette comprising:
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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 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, 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. - View Dependent Claims (64, 65, 66, 67, 68, 69, 70, 71, 72, 74)
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73. A fluid handling cassette for use with a fluid handling system of a medical infusion device, the cassette comprising:
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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. - View Dependent Claims (76, 80, 81, 82, 87, 88, 89, 90)
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- 75. (canceled)
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83-86. -86. (canceled)
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91-96. -96. (canceled)
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97. A fluid handling cassette for use with a fluid handling system of a medical infusion device, the cassette comprising:
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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 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, 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 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.
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98. A fluid handling cassette for use in a fluid handling system useable in a medical infusion application, the cassette comprising:
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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 at least one pump chamber including a plurality of spacer elements that extend from an inner wall of the depression to different extents; 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; 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 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.
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99. (canceled)
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100. A fluid handling cassette for use in a fluid handling system useable in a medical infusion application, the cassette comprising:
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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 at least one pump chamber including one or more spacer elements that extend from an inner wall of the depression and including a fluid outlet; 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 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 spacer element is configured to inhibit the membrane from covering the fluid outlet.
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Specification