Blood fluid removal system performance monitoring
First Claim
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1. A blood fluid removal system comprising:
- a media housing defining a major chamber;
a blood fluid removal membrane disposed into the media housing and sealingly dividing the major chamber into first and second minor chambers;
a first inlet and a first outlet in fluid communication with the first minor chamber, wherein the system is configured such that blood enters the first minor chamber through the first inlet and exits the first minor chamber though the first outlet;
a second outlet in fluid communication with the second minor chamber, wherein the system is configured such that fluid removed from the blood exits the second minor chamber through the second outlet;
a first sensor configured to detect an indicator of a blood waste product at or downstream of the second outlet;
control electronics configured to acquire data from the sensor and configured to determine whether the membrane is functioning within predetermined parameters based on the acquired data; and
further comprising;
(i) a second inlet in communication with the second minor chamber, wherein dialysate is configured to flow through the second inlet and the second outlet; and
(ii) a dialysate flow controller operably coupled to the control electronics, wherein, if the membrane is determined not to be functioning within predetermined limits, the control electronics are configured to adjust one or more system parameters selected from the group of;
adjusting a dialysate flow rate via the dialysate flow controller, adjusting a blood flow rate via a blood flow control element, and adjusting a pressure differential between the first minor chamber and the second minor chamber.
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Abstract
Monitoring of the performance of a blood fluid removal medium of a blood fluid removal device includes monitoring of condition, such as fluid flow rate or concentration of blood waste product, downstream of the medium. Upstream monitoring of the condition may also be performed to enhance the ability to determine whether the blood fluid removal medium is performing within predetermined ranges.
266 Citations
21 Claims
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1. A blood fluid removal system comprising:
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a media housing defining a major chamber; a blood fluid removal membrane disposed into the media housing and sealingly dividing the major chamber into first and second minor chambers; a first inlet and a first outlet in fluid communication with the first minor chamber, wherein the system is configured such that blood enters the first minor chamber through the first inlet and exits the first minor chamber though the first outlet; a second outlet in fluid communication with the second minor chamber, wherein the system is configured such that fluid removed from the blood exits the second minor chamber through the second outlet; a first sensor configured to detect an indicator of a blood waste product at or downstream of the second outlet; control electronics configured to acquire data from the sensor and configured to determine whether the membrane is functioning within predetermined parameters based on the acquired data; and
further comprising;(i) a second inlet in communication with the second minor chamber, wherein dialysate is configured to flow through the second inlet and the second outlet; and
(ii) a dialysate flow controller operably coupled to the control electronics, wherein, if the membrane is determined not to be functioning within predetermined limits, the control electronics are configured to adjust one or more system parameters selected from the group of;
adjusting a dialysate flow rate via the dialysate flow controller, adjusting a blood flow rate via a blood flow control element, and adjusting a pressure differential between the first minor chamber and the second minor chamber. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A blood fluid removal system comprising:
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a media housing defining a major chamber; a blood fluid removal membrane disposed into the media housing and sealingly dividing the major chamber into first and second minor chambers; a first inlet and a first outlet in fluid communication with the first minor chamber, wherein the system is configured such that blood enters the first minor chamber through the first inlet and exits the first minor chamber though the first outlet; a second inlet and a second outlet in fluid communication with the second minor chamber, wherein the system is configured such that fluid removed from the blood exits the second minor chamber through the second outlet and such that dialysate flows through the second minor chamber from the second inlet to the second outlet; one or more sensors configured to measure a pressure differential across the membrane; control electronics configured to acquire data from the one or more sensors and configured to determine whether the membrane is functioning within a first predefined range of parameters based on the acquired data;
wherein, if the membrane is determined not to be functioning within the first predefined range of parameters, the control electronics determine whether the data from the one or more sensors is indicative of clotting or of protein deposition; anda dialysate flow controller operably coupled to the control electronics, wherein, if the membrane is determined not to be functioning within predetermined limits, the control electronics are configured to adjust one or more system parameters from an original setting, wherein adjusting the one or more system parameters is selected from the group of;
adjusting a dialysate flow rate via the dialysate flow controller, adjusting a blood flow rate via a blood flow control element, and adjusting a pressure differential between the first minor chamber and the second minor chamber;wherein, if the data from the one or more sensors is indicative of clotting;
the control electronics are further configured to increase an amount of anticoagulants added to the blood or dialysate. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification