EXTRACORPOREAL BLOOD TREATMENT AND SYSTEM HAVING REVERSIBLE BLOOD PUMPS
First Claim
1. An extracorporeal blood processing method using a blood circuit comprising a pair of blood passages attached to opposite flow ends of a blood treatment device and said blood circuit is mounted on a blood pump console, said method comprising:
- a. withdrawing blood from a vascular system of a human patient and drawing the blood into the blood circuit;
b. pumping the withdrawn blood through one of the pair of blood passages using a first blood pump of the console and into the blood treatment device;
c. pumping the treated blood from the treatment device through the other of the pair of blood passages using a second blood pump of the console;
d. infusing the treated blood from the other blood passage and into the vascular system of the patient, ande. periodically reversing a flow direction of blood through the pair of blood passages and blood treatment device.
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Accused Products
Abstract
An extracorporeal blood processing method using a blood circuit comprising a pair of blood passages attached to opposite flow ends of a blood treatment device and said blood circuit is mounted on a blood pump console, the method includes: withdrawing blood from a vascular system of a human patient and drawing the blood into the blood circuit; pumping the withdrawn blood through one of the pair of blood passages using a first blood pump of the console and into the blood treatment device; pumping the treated blood from the treatment device through the other of the pair of blood passages using a second blood pump of the console; infusing the treated blood from the other blood passage and into the vascular system of the patient, and periodically reversing a flow direction of blood through the pair of blood passages and blood treatment device.
43 Citations
59 Claims
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1. An extracorporeal blood processing method using a blood circuit comprising a pair of blood passages attached to opposite flow ends of a blood treatment device and said blood circuit is mounted on a blood pump console, said method comprising:
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a. withdrawing blood from a vascular system of a human patient and drawing the blood into the blood circuit; b. pumping the withdrawn blood through one of the pair of blood passages using a first blood pump of the console and into the blood treatment device; c. pumping the treated blood from the treatment device through the other of the pair of blood passages using a second blood pump of the console; d. infusing the treated blood from the other blood passage and into the vascular system of the patient, and e. periodically reversing a flow direction of blood through the pair of blood passages and blood treatment device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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24. A method of extracorporeal blood processing using a blood circuit comprising a pair of blood passages attached to opposite flow ends of a blood treatment device and the blood circuit is mounted on a blood pump console, said method comprising:
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a. withdrawing blood from a vascular system of a human patient and drawing the blood into the blood circuit; b. pumping the withdrawn blood through one of the pair of blood passages using a first blood pump of the console and into the blood treatment device; c. pumping the treated blood from the treatment device through the other of the pair of blood passages using a second blood pump of the console; d. infusing the treated blood from the other blood passage and into the vascular system of the patient; e. periodically reversing a flow direction of blood through the pair of blood passages and blood treatment device, and f. sensing a pressure in the blood passage downstream of the blood treatment device during both flow directions, and g. controlling a pumping rate of blood through the downstream blood passages based on the pressure in the downstream blood passage. - View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A method for monitoring a volume of filtrate in a collection bag comprising:
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a. placing the collection bag in a walled container having a displaceable surface; b. filtering filtrate from extracorporeal blood flowing through a blood circuit; c. filling the collection bag with the filtrate; d. as the collection bag fills with filtrate, the bag expands and displaces the displaceable surface; e. sensing a degree of displacement of the displaceable surface, and f. ceasing filling the collection bag with filtrate when the degree of displacement exceeds a threshold value. - View Dependent Claims (33, 34)
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35. A filtrate collection container system comprising:
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a container having at least one wall to receive the collection container; a displaceable wall of said container abutting the collection container; a bias applied to dispose the displaceable wall against the collection container, and a sensor detecting a force applied by the collection container against the displaceable wall. - View Dependent Claims (36, 37)
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38. A method of collecting filtrate in a filtration bag of an extracorporeal blood circuit having a blood filter, said method comprising:
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a. withdrawing blood from a mammalian patient into the blood circuit and filtering the blood with the filter; b. withdrawing filtrate from the filter and collecting the filtrate in an expandable container; c. sensing an expansion of the container as filtrate is collected in the container, and d. determining the container is filled with filtrate based on the expansion of the container. - View Dependent Claims (39, 40)
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41. A extracorporeal blood treatment system comprising:
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a blood circuit comprising a first blood passage coupled to a blood filter and a second blood passage coupled to the blood filter, wherein said first and second blood passages each are adapted to be coupled to a vascular system of a human patient; a first blood pump connectable to the first blood passage and a second blood pump connectable to the second blood passage, wherein said first and second blood pumps are adapted to move blood through the first and second blood passages and the blood filter in a first direction and in a reverse direction, a filtrate pump withdrawing filtrate from the filter, and a pump controller operatively connected to the first and second blood pumps and to said filtrate pump. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
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51. A portable extracorporeal blood treatment system comprising:
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a blood circuit comprising a first blood passage coupled to a blood filter and a second blood passage coupled to the blood filter, wherein said first and second blood passages each are adapted to be coupled to a vascular system of a human patient; at least one blood pump connectable to the first blood passage, wherein said pump is adapted to move blood through the first and second blood passages and the filter, a filtrate collection container receiving filtrate withdrawn from the filter, a pump controller operatively connected to the blood pump to control a blood withdrawal rate into the blood circuit, and a harness wearable by the patient and said harness supports the blood pump, filter, pump controller and filtrate collection container. - View Dependent Claims (52, 53, 54, 55)
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56. An extracorporeal blood treatment system comprising:
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a blood circuit comprising a first blood passage coupled to a blood filter and a second blood passage coupled to the blood filter, wherein said first and second blood passages each are adapted to be coupled to a vascular system of a human patient; at least one blood pump connectable to the first blood passage, wherein said pump is adapted to move blood through the first and second blood passages and the filter, a filtrate collection container receiving filtrate withdrawn from the filter, a single air-in-blood detector coupled to both the first and second blood passages, a pump controller operatively connected to the blood pump to control a rate of blood withdrawal into the blood circuit. - View Dependent Claims (57, 58, 59)
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Specification