WEARABLE CONTINUOUS RENAL REPLACEMENT THERAPY DEVICE
First Claim
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1. A continuous renal replacement therapy (CRRT) device comprising:
- means for enabling a patient to wear the entire CRRT device;
a battery powered microcontroller;
a blood circuit including a blood inlet tube for receiving blood from a patient, the blood circuit including;
a first, battery powered pump channel, controlled by the microcontroller for pumping blood in a pulsatile manner through the blood circuit;
a first micropump for pumping an anticoagulant into the blood circuit;
a dialyzer for receiving blood pumped by the first pump channel;
a pressure transducer for providing a blood circuit pressure signal to the microcontroller;
an outlet port for allowing blood to go back into the patient after being received by the dialyzer; and
a dialysate circuit for circulating dialysate through the dialyzer and for removing contaminants from the circulating dialysate, the dialysate circuit comprising;
a second, battery powered pump channel, controlled by the microcontroller, for pumping dialysate in a pulsatile manner at a flow rate between 40 ml/min and 100 ml/min through the dialysate circuit;
a filter section for reacting with predetermined substances in the dialysate in order to refresh the dialysate for continued usage in the dialysate circuit;
a sensor, attached to the dialysate circuit, for providing a signal to the microcontroller indicating that the filter section requires maintenance;
a degasser, attached to the dialysate circuit, for removing gas from the dialysate circuit; and
wherein the microcontroller, blood circuit and dialysate circuit are operably interconnected to provide continuous renal replacement therapy while the CRRT device is worn by a patient.
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Abstract
A continuous renal replacement therapy (CRRT) device adapted to be worn on a portion of the body of a patient. The CRRT device is worn by the patient and operates on rechargeable batteries for more than 5 hours. Dialysate is used to remove impurities from the blood. The dialysate is recycled and refreshed by a filter section. Less than one liter of dialysate is required to circulate through the wearable CRRT device.
87 Citations
20 Claims
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1. A continuous renal replacement therapy (CRRT) device comprising:
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means for enabling a patient to wear the entire CRRT device;
a battery powered microcontroller;
a blood circuit including a blood inlet tube for receiving blood from a patient, the blood circuit including;
a first, battery powered pump channel, controlled by the microcontroller for pumping blood in a pulsatile manner through the blood circuit;
a first micropump for pumping an anticoagulant into the blood circuit;
a dialyzer for receiving blood pumped by the first pump channel;
a pressure transducer for providing a blood circuit pressure signal to the microcontroller;
an outlet port for allowing blood to go back into the patient after being received by the dialyzer; and
a dialysate circuit for circulating dialysate through the dialyzer and for removing contaminants from the circulating dialysate, the dialysate circuit comprising;
a second, battery powered pump channel, controlled by the microcontroller, for pumping dialysate in a pulsatile manner at a flow rate between 40 ml/min and 100 ml/min through the dialysate circuit;
a filter section for reacting with predetermined substances in the dialysate in order to refresh the dialysate for continued usage in the dialysate circuit;
a sensor, attached to the dialysate circuit, for providing a signal to the microcontroller indicating that the filter section requires maintenance;
a degasser, attached to the dialysate circuit, for removing gas from the dialysate circuit; and
wherein the microcontroller, blood circuit and dialysate circuit are operably interconnected to provide continuous renal replacement therapy while the CRRT device is worn by a patient. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wearable, continuous renal replacement therapy (CRRT) device comprising:
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a battery powered microcontroller;
a battery powered, dual channel pulsatile pump, controlled by the microcontroller, the dual channel pulsatile pump including a motor, a first pump channel and a second pump channel;
a blood circuit comprising;
a blood inlet tube for receiving blood from a patient wherein the first pump channel pumps blood in a pulsatile manner through the blood circuit;
a first micropump for pumping an anticoagulant into the blood circuit, the micropump being controlled by the microcontroller;
a dialyzer for receiving blood pumped by the first pump channel;
a first pressure transducer for providing a first blood circuit pressure signal to the microcontroller;
an outlet port for allowing blood to go back into the patient after being received by the dialyzer;
a dialysate circuit for circulating dialysate through the dialyzer and for removing contaminants from the circulating dialysate, wherein the second pump channel pumps dialysate at a flow rate between 40 ml/min and 100 ml/min in a pulsatile manner through the circuit, the dialysate circuit comprising;
a filter section for reacting with predetermined substances in the dialysate in order to refresh the dialysate for continued usage in the dialysate circuit;
a sensor, attached to the dialysate circuit, providing a signal to the microcontroller indicating that the filter section requires maintenance;
an alarm operatively connected to the microcontroller, the alarm indicating that the continuous renal replacement therapy (CRRT) device requires maintenance; and
wherein the microcontroller, dual channel pulsatile pump, blood circuit, dialysate circuit are operably interconnected to provide continuous renal replacement therapy while the CRRT device is worn by a patient. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A wearable, continuous renal replacement therapy (CRRT) device comprising:
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a battery powered microcontroller;
first and second pump channels for pumping blood and dialysate, respectively, in a pulsatile manner wherein the first and second pump channels each pump a predetermined number of degrees out of phase;
a blood circuit comprising;
a blood inlet tube for receiving blood from a patient wherein the first pump channel pumps blood in a pulsatile manner through the blood circuit;
a first micropump for pumping an anticoagulant into the blood circuit;
a dialyzer receiving blood pumped by the first pump channel;
a second micropump for adding at least one of electrolytes, blood additives, drugs, vitamins and hormones to the blood prior to the blood returning to the patient. a pressure transducer for providing a blood circuit pressure signal to the microcontroller;
an outlet port for allowing blood to go back into the patient after being received by the dialyzer; and
a dialysate circuit for circulating dialysate through the dialyzer and for removing contaminants from the circulating dialysate wherein the second pump channel pumps dialysate at a flow rate between 40 ml/min and 100 ml/min through the dialysate circuit, the dialysate circuit comprising;
a filter section for refreshing the dialysate for continued usage in the dialysate circuit, the filter section including a plurality of discrete filters;
a sensor, attached to the dialysate circuit, providing a signal to the microprocessor indicating that the filter section requires maintenance;
a degasser, attached to the dialysate circuit, for removing gas from the dialysate circuit; and
wherein the microcontroller, first and second pump channels, blood circuit, and dialysate circuit are operably interconnected to provide continuous renal replacement therapy while worn by a patient. - View Dependent Claims (17, 18, 19, 20)
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Specification