Blood flow control in a blood treatment device
First Claim
1. A renal replacement therapy system comprising an extracorporeal circuit for circulating blood from an individual through a blood treatment device to remove waste, the extracorporeal circuit including a blood line coupled to the blood treatment device and adapted to draw blood from the individual, a blood pump to convey blood through the blood line from the individual into the blood treatment device at a blood flow rate, a waste removal line to convey waste fluid from the blood treatment device, a sensor in the blood line to sense blood pressure, and a controller coupled to the sensor and the blood pump to adjust the blood flow rate to maintain blood pressure at a predetermined set value.
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Accused Products
Abstract
A first flow path is defined within a first panel that forms a part of an extracorporeal fluid circuit. A second flow path is defined within a second panel that also forms a part of the extracorporeal fluid circuit. The first and second panels are oriented in a fluid processing cartridge for mounting as an integrated unit on a fluid processing machine and for removal as an integrated unit from the fluid processing machine.
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Citations
12 Claims
- 1. A renal replacement therapy system comprising an extracorporeal circuit for circulating blood from an individual through a blood treatment device to remove waste, the extracorporeal circuit including a blood line coupled to the blood treatment device and adapted to draw blood from the individual, a blood pump to convey blood through the blood line from the individual into the blood treatment device at a blood flow rate, a waste removal line to convey waste fluid from the blood treatment device, a sensor in the blood line to sense blood pressure, and a controller coupled to the sensor and the blood pump to adjust the blood flow rate to maintain blood pressure at a predetermined set value.
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4. A method for carrying out renal replacement therapy comprising the steps of
conveying blood from the individual at a blood flow rate through a blood line into a blood treatment device to remove waste fluid, conveying waste fluid from the blood treatment device through a waste removal line, sensing blood pressure in the blood line, and adjusting the blood flow rate to maintain blood pressure at a predetermined set value.
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7. A renal replacement therapy system, comprising:
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a filter;
an arterial blood line connectable to a patient access and adapted to convey blood from said patient access to a filter;
a venous blood line connectable to said patient access and adapted to convey blood from said filter to patient access; and
a pump configured to convey blood through said arterial blood line, a sensor to sense pressure in said arterial blood line, and a controller connected to receive a pressure signal from said sensor and to control a rate of flow of said pump;
said controller being configured to maintain a constant pressure in said arterial blood line by regulating a speed of said pump in response to said pressure signal. - View Dependent Claims (8, 9, 10, 11, 12)
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Specification