Renal therapy system with cassette-based blood and dialysate pumping
DCFirst Claim
1. A renal therapy system comprising:
- a peristaltic blood pump actuator;
a peristaltic dialysis fluid pump actuator;
a dialysis fluid heater;
a dialyzer; and
a disposable unit includinga blood cassette portion including a blood cassette housing and configured to be operatively connected to the peristaltic blood pump actuator to pump blood through the blood cassette portion when the blood cassette portion is in fluid communication with a blood source, the blood cassette portion in fluid communication with the dialyzer and including an air separation chamber for separating air from the pumped blood,a dialysis fluid cassette portion including a dialysis fluid cassette housing separate from the blood cassette housing and configured to be operatively connected to the peristaltic dialysis fluid pump actuator to pump dialysis fluid through the dialysis fluid cassette portion when the dialysis fluid cassette portion is in fluid communication with a dialysis fluid source, the dialysis fluid cassette portion in fluid communication with the dialyzer, anda heater bag configured to be placed in operable communication with the dialysis fluid heater and in fluid communication with the dialysis fluid cassette portion via a to-heater tube and a from-heater tube, wherein the heater bag is spaceable away from the dialysis fluid cassette portion, and wherein the dialysis fluid heater is spaced away from the peristaltic dialysis fluid pump actuator so that the heater bag is placeable in operable communication with the dialysis fluid heater while the dialysis fluid cassette portion is operably connected to the peristaltic dialysis fluid pump actuator.
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Abstract
A renal therapy system with cassette-based blood and dialysate pumping is disclosed. An example system includes a blood pump actuator, a dialysis fluid pump actuator, a dialysis fluid heater, a dialyzer, and a disposable unit. The example disposable unit includes a blood cassette portion configured to be operatively connected to the blood pump actuator to pump blood through the blood cassette portion. The example disposable unit also includes a dialysis fluid cassette portion, separate from the blood cassette portion, configured to be operatively connected to the dialysis fluid pump actuator to pump dialysis fluid through the dialysis fluid cassette portion. The blood cassette portion and the dialysis fluid cassette portion are both in fluid communication with the dialyzer. The example disposable unit also includes a heater bag configured to be placed in operable communication with the dialysis fluid heater and in fluid communication with the dialysis fluid cassette portion.
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Citations
20 Claims
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1. A renal therapy system comprising:
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a peristaltic blood pump actuator; a peristaltic dialysis fluid pump actuator; a dialysis fluid heater; a dialyzer; and a disposable unit including a blood cassette portion including a blood cassette housing and configured to be operatively connected to the peristaltic blood pump actuator to pump blood through the blood cassette portion when the blood cassette portion is in fluid communication with a blood source, the blood cassette portion in fluid communication with the dialyzer and including an air separation chamber for separating air from the pumped blood, a dialysis fluid cassette portion including a dialysis fluid cassette housing separate from the blood cassette housing and configured to be operatively connected to the peristaltic dialysis fluid pump actuator to pump dialysis fluid through the dialysis fluid cassette portion when the dialysis fluid cassette portion is in fluid communication with a dialysis fluid source, the dialysis fluid cassette portion in fluid communication with the dialyzer, and a heater bag configured to be placed in operable communication with the dialysis fluid heater and in fluid communication with the dialysis fluid cassette portion via a to-heater tube and a from-heater tube, wherein the heater bag is spaceable away from the dialysis fluid cassette portion, and wherein the dialysis fluid heater is spaced away from the peristaltic dialysis fluid pump actuator so that the heater bag is placeable in operable communication with the dialysis fluid heater while the dialysis fluid cassette portion is operably connected to the peristaltic dialysis fluid pump actuator. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A renal therapy system comprising:
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a peristaltic blood pump actuator; a peristaltic dialysis fluid pump actuator; a dialysis fluid heater; a dialyzer; and a disposable unit including a blood cassette portion configured to be operatively connected to the peristaltic blood pump actuator to pump blood through the blood cassette portion when the blood cassette portion is in fluid communication with a blood source, the blood cassette portion in fluid communication with the dialyzer and having a blood cassette housing, a dialysis fluid cassette portion configured to be operatively connected to the peristaltic dialysis fluid pump actuator to pump dialysis fluid through the dialysis fluid cassette portion when the dialysis fluid cassette portion is in fluid communication with a dialysis fluid source, the dialysis fluid cassette portion in fluid communication with the dialyzer and having a dialysis cassette housing separate from the blood cassette housing, and a heater bag configured to be placed in operable communication with the dialysis fluid heater and in fluid communication with the dialysis fluid cassette portion via a to-heater tube and a from-heater tube, the to-heater tube in fluid communication with the from-heater tube via a serpentine heating pathway provided within the heater bag, wherein the heater bag is spaceable away from the dialysis fluid cassette portion, and wherein the dialysis fluid heater and the peristaltic blood pump actuator are spaced away from the peristaltic dialysis fluid pump actuator so that (i) the heater bag is placeable in operable communication with the dialysis fluid heater while the dialysis fluid cassette portion is operably connected to the peristaltic dialysis fluid pump actuator and (ii) the blood cassette housing in operation is spaced away from the dialysis fluid cassette housing. - View Dependent Claims (12, 13, 14, 15, 16)
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17. A disposable unit for a renal therapy system, the disposable unit comprising:
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a blood cassette portion including a blood cassette housing and a blood pumping tube; a dialysis fluid cassette portion including a dialysis fluid cassette housing separate from the blood cassette housing, a dialysis fluid pumping tube, a to-heater tube and a from-heater tube; and a heater bag in fluid communication with the to-heater tube and the from-heater tube via a serpentine heating pathway located within the heater bag. - View Dependent Claims (18, 19, 20)
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Specification