Dialysis fluid measurement systems using conductive contacts
First Claim
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1. A dialysis system comprising:
- a dialysis instrument;
a disposable pumping cassette apparatus operable with a pumping actuator of the dialysis instrument, the disposable cassette including an electronic cell, the electronic cell including a first and second electrode; and
electronics associated with the electronic cell, the electronics including a source configured to provide one of a current and a voltage signal to at least one of the first and second electrodes, a measuring device configured to determine a resistance of a solution between the first and second electrodes by measuring the other of the current and the voltage signal, and a meter connected to the first and second electrodes and configured to protect the system against or to alert the system of a faulty connection between at least one of the first and second electrodes and the source.
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Abstract
A dialysis system instrument includes a dialysis instrument, a disposable pumping and valving cassette apparatus operable with pumping and valving actuators of the dialysis instrument, the disposable cassette including an electronic cell and electronics associated with the electronic cell, the electronics configured to determine an electrical property of a solution flowing through the electronic cell of the disposable apparatus.
84 Citations
21 Claims
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1. A dialysis system comprising:
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a dialysis instrument; a disposable pumping cassette apparatus operable with a pumping actuator of the dialysis instrument, the disposable cassette including an electronic cell, the electronic cell including a first and second electrode; and electronics associated with the electronic cell, the electronics including a source configured to provide one of a current and a voltage signal to at least one of the first and second electrodes, a measuring device configured to determine a resistance of a solution between the first and second electrodes by measuring the other of the current and the voltage signal, and a meter connected to the first and second electrodes and configured to protect the system against or to alert the system of a faulty connection between at least one of the first and second electrodes and the source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A dialysis system comprising:
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a dialysis instrument; a disposable cassette operable with the dialysis instrument, the disposable cassette including a rigid structure, the rigid structure including first and second apertures each defined by a non-uniform wall, each non-uniform wall defining a receiving structure; first and second conductive contacts having non-uniform shapes that mate with the non-uniform walls of the first and second apertures, each non-uniform shape including a retainer ring portion, wherein each receiving structure is sized and shaped to snap-fittingly receive one of the retainer ring portions; and electronics operable with the first and second contacts to determine at least one of;
(i) a patient access disconnection;
(ii) a temperature of a medical fluid flowing through the cassette; and
(iii) a conductivity of the medical fluid flowing through the cassette. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21)
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Specification