Systems, methods and apparatuses for pumping cassette-based therapies
First Claim
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1. A system for performing dialysis comprising:
- a patient line;
a disposable cassette in communication with the patient line;
a pump spring biasing a pump head to close a pumping portion of the cassette;
a valve spring biasing a valve plunger to close a valve portion of the cassette; and
a source that applies negative pressure to compress the pump spring and valve spring, allowing fluid to flow into the pumping portion and through the valve portion of the cassette.
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Abstract
The present invention provides systems, methods and apparatuses for medical fluid delivery systems that employ a pumping cassette. In particular, the present invention provides systems, methods and apparatuses for cassette-based dialysis therapies including hemodialysis, hemofiltration, APD (including tidal modalities) and CFPD. The embodiments described include a combined pump/valve housing, a fail safe pump/valve arrangement, a cassette auto-alignment feature, a pumping membrane material, a multiplexing valve arrangement, an expert fluid pumping management system, an integral port vent and an in-line air separation chamber and combinations of each of these.
796 Citations
14 Claims
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1. A system for performing dialysis comprising:
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a patient line; a disposable cassette in communication with the patient line; a pump spring biasing a pump head to close a pumping portion of the cassette; a valve spring biasing a valve plunger to close a valve portion of the cassette; and a source that applies negative pressure to compress the pump spring and valve spring, allowing fluid to flow into the pumping portion and through the valve portion of the cassette. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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Specification