Hemodialysis system with cassette-based blood and dialyste pumping
First Claim
1. A hemodialysis system comprising:
- a dialyzer;
a dialysate source;
a dialysate pump;
a dialysate cassette operatively connected to the dialysate pump such that the dialysate pump can pump dialysate through the dialysate cassette when the dialysate cassette is in fluid communication with the dialysate source, the dialysate cassette in fluid communication with the dialyzer;
a blood pump; and
a blood cassette operatively connected to the blood pump such that the blood pump can pump blood through the blood cassette, the blood cassette including a rigid housing and a flexible membrane attached to the rigid housing, the housing including a from-patient tube connector, a to-patient tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, and wherein the flexible membrane defines a valve seat for opening and closing a to-patient line of the blood cassette, the to-patient line in fluid communication with the to-patient tube connector.
1 Assignment
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Accused Products
Abstract
A hemodialysis system includes: (i) a dialyzer; (ii) a dialysate source; a dialysate pump; (iii) a dialysate cassette operatively connected to the dialysate pump such that the dialysate pump can pump dialysate through the dialysate cassette when the dialysate cassette is in fluid communication with the dialysate source, the dialysate cassette in fluid communication with the dialyzer; (iv) a blood pump; and (v) a blood cassette separate from the dialysate cassette, the blood cassette operatively connected to the blood pump such that the blood pump can pump blood through the blood cassette, the blood cassette including a housing, the housing including a from-patient tube connector, a to-patient tube connector, a saline/priming tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, and an internal air separation chamber.
143 Citations
23 Claims
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1. A hemodialysis system comprising:
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a dialyzer; a dialysate source; a dialysate pump; a dialysate cassette operatively connected to the dialysate pump such that the dialysate pump can pump dialysate through the dialysate cassette when the dialysate cassette is in fluid communication with the dialysate source, the dialysate cassette in fluid communication with the dialyzer; a blood pump; and a blood cassette operatively connected to the blood pump such that the blood pump can pump blood through the blood cassette, the blood cassette including a rigid housing and a flexible membrane attached to the rigid housing, the housing including a from-patient tube connector, a to-patient tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, and wherein the flexible membrane defines a valve seat for opening and closing a to-patient line of the blood cassette, the to-patient line in fluid communication with the to-patient tube connector. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A hemodialysis system comprising:
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a dialyzer; a blood pump; fresh and used dialysate pumps; a blood cassette including a rigid housing and a flexible membrane attached to the rigid housing, the rigid housing including a blood pumping tube operatively connected to the blood pump for pumping blood through the blood cassette, the housing further including a from-patient tube connector, a to-patient tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, a valve seat defined by the flexible membrane for opening and closing a to-patient line of the blood cassette, the to-patient line in fluid communication with the to-patient tube connector, a fresh dialysate pumping tube operatively connectable to the fresh dialysate pump, and a used dialysate pumping tube operatively connectable to the used dialysate pump; wherein the fresh and used dialysate pumps are operable with a dialysate cassette separate from the blood cassette, the dialysate cassette in fluid communication with the dialyzer; and wherein at least one of the tube connectors is a tube port. - View Dependent Claims (17)
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18. A hemodialysis system comprising:
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a dialyzer; a blood pump; fresh and used dialysate pumps; a cassette including a rigid housing and a flexible membrane attached to the rigid housing, the rigid housing including a blood pumping tube operatively connected to the blood pump for pumping blood through the cassette, the housing further including a from-patient tube connector, a to-patient tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, a valve seat defined by the flexible membrane for opening and closing a to-patient line of the cassette, the to-patient line in fluid communication with the to-patient tube connector, a fresh dialysate pumping tube operatively connectable to the fresh dialysate pump, and a used dialysate pumping tube operatively connectable to the used dialysate pump; and wherein the cassette further includes a vent to vent air removed from blood within the cassette.
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19. A hemodialysis system comprising:
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a dialyzer; a blood pump; fresh and used dialysate pumps; a cassette including a rigid housing and a flexible membrane attached to the rigid housing, the rigid housing including a blood pumping tube operatively connected to the blood pump for pumping blood through the cassette, the housing further including a from-patient tube connector, a to-patient tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, a valve seat defined by the flexible membrane for opening and closing a to-patient line of the cassette, the to-patient line in fluid communication with the to-patient tube connector, a fresh dialysate pumping tube operatively connectable to the fresh dialysate pump, and a used dialysate pumping tube operatively connectable to the used dialysate pump; and wherein the cassette includes an air separation chamber formed within the housing.
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20. A hemodialysis system comprising:
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a dialyzer; a blood pump; and a blood cassette including a housing and a pumping tube, the pumping tube located outside of the housing and extending along a first side of the housing, the pumping tube operatively connected to the blood pump such that the blood pump in operation contacts the pumping tube for pumping blood through the cassette, the housing including a from-patient tube connector, a to-patient tube connector, a saline/priming tube connector, a to-dialyzer tube connector, a from-dialyzer tube connector, and wherein each of the connectors extends along a side of the housing different from the first side of the housing. - View Dependent Claims (21, 22, 23)
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Specification