TREATMENT SOLUTION DELIVERY IN AN EXTRACORPOREAL BLOOD TREATMENT APPARATUS
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Accused Products
Abstract
Blood treatment apparatus and methods of using the same are described herein that include two or more intermediate containers located between a treatment solution source and a port through which the treatment solution is to be delivered with the blood treatment apparatus. The weight of the intermediate containers is measured and used to control the refilling and emptying of treatment solution in the intermediate containers.
4 Citations
68 Claims
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1-43. -43. (canceled)
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44. A blood treatment apparatus comprising:
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a blood circuit that includes an arterial line intended to draw blood from a patient and a venous line intended to return blood to the patient; a filter having a primary chamber and a secondary chamber separated by a semi-permeable membrane, wherein the blood circuit is configured to pass blood through the primary chamber, and wherein the blood treatment apparatus comprises a drain line exiting the secondary chamber to remove spent dialysate from the secondary chamber, and a treatment solution delivery system having a treatment solution port and configured to deliver treatment solution to the secondary chamber and/or to the blood circuit through the treatment solution port, wherein the treatment solution delivery system comprises; a first intermediate container; a first gravimetric scale configured to weigh the first intermediate container; a second intermediate container; a second gravimetric scale configured to weigh the second intermediate container; a source flow controller configured to deliver treatment solution from a treatment solution source to the first intermediate container weighed by the first gravimetric scale and to the second intermediate container weighed by the second gravimetric scale; an output controller configured to control the flow of treatment solution from the first intermediate container and the second intermediate container to the treatment solution port; a container selection controller located in a treatment solution path between the source flow controller and the output controller; a control unit operably attached to the first gravimetric scale, the second gravimetric scale, the source flow controller, the container selection controller, and the output controller, wherein the control unit is configured to; receive weight signals from the first and second gravimetric scales; control the source flow controller, the container selection controller, and the output controller in a first mode in which treatment solution is delivered to the output controller while treatment solution leaves the first intermediate container and the second intermediate container fills with treatment solution; control the source flow controller, the container selection controller, and the output controller in a second mode in which the second intermediate container delivers treatment solution to the output controller while the first intermediate container fills with treatment solution from the treatment solution source. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68)
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Specification