Apparatus and method for down-regulating immune system mediators in blood
First Claim
1. A method for down-regulating a patient'"'"'s immune system by removing one or more immune system mediators from the patient'"'"'s blood, comprising:
- removing at least a portion of the patient'"'"'s blood;
diluting the blood with a diluent to provide diluted blood, thereby reducing the hematocrit of said blood;
concentrating the diluted blood using a membrane having a transmembrane pressure greater than 76 mmHg, thereby removing the diluent therefrom;
filtering said diluted blood to remove one or more immune system mediators from said diluted blood, thereby producing treated blood; and
returning the treated blood to the patient.
2 Assignments
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Accused Products
Abstract
A method and apparatus for preventing and treating septicemia in patient blood is provided. The extracorporeal system includes an antimicrobial device to inactivate at least 99% of bloodborne microorganisms, a hemoconcentrator/filtration unit to remove approximately 50–75% of target molecules from the patient blood and a filter unit to remove target molecules from patient blood from the sieved plasma filtrate. Target molecules are produced by microorganisms, as well as by the patient'"'"'s cells. These molecules include endotoxins from Gram negative bacteria, exotoxins from Gram negative and Gram positive bacteria, as well as RAP protein mediator from Staphylococcus aureus, and cell mediators such as tumor necrosis factor-alpha, and interleukin 1-beta, interleukin 6, complement proteins C3a and C5a, and bradykinin.
54 Citations
49 Claims
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1. A method for down-regulating a patient'"'"'s immune system by removing one or more immune system mediators from the patient'"'"'s blood, comprising:
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removing at least a portion of the patient'"'"'s blood; diluting the blood with a diluent to provide diluted blood, thereby reducing the hematocrit of said blood; concentrating the diluted blood using a membrane having a transmembrane pressure greater than 76 mmHg, thereby removing the diluent therefrom; filtering said diluted blood to remove one or more immune system mediators from said diluted blood, thereby producing treated blood; and returning the treated blood to the patient. - 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, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A system for down-regulating a patient'"'"'s immune system by removing one or more immune system mediators from the patient'"'"'s blood, comprising:
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apparatus for removing blood from the patient; a diluent source for supplying a diluent to the blood which has been removed from the patient for the purpose of diluting the blood and reducing the hematocrit thereof; a first filter for receiving the diluted blood and extracting one or more immune system mediators and diluent therefrom, said first filter having a transmembrane pressure greater than 76 mmHg; a second filter for receiving the output from said first filter including immune system mediators and diluent and extracting the immune system mediators therefrom; and a return pathway for returning a portion of the blood to the patient after the immune system mediators and diluent have been extracted therefrom by said first filter. - View Dependent Claims (48, 49)
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Specification