PUMP CASSETTE AND METHODS FOR USE IN MEDICAL TREATMENT SYSTEM USING A PLURALITY OF FLUID LINES
2 Assignments
0 Petitions
Accused Products
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.
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Citations
104 Claims
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1-22. -22. (canceled)
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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; 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, 101)
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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 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. - View Dependent Claims (102)
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48-72. -72. (canceled)
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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, 77, 78, 79, 80, 81, 82, 87, 88, 89, 90, 103, 104)
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74-75. -75. (canceled)
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83-86. -86. (canceled)
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91-100. -100. (canceled)
Specification