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公开(公告)号：DE69119787T2
公开(公告)日：1997-01-23
申请号：DE69119787
申请日：1991-06-26
Applicant: BAXTER INT
Inventor： PRINCE PAUL R , MILLER WILLIAM , BENJAMIN GRANT S
Abstract: A simplified fluid separation method and device usable for various apheresis procedures, including plasmapheresis. At least one pump is utilized to draw a first fluid (e.g. whole blood) into a separation device. The separation device then operates to separate the fluid (e.g. whole blood) into first and second fluid fractions (e.g. a cell concentrate and blood plasma). The first and second fluid fractions are pumped from the separation device to separate first and second fluid fraction containers, both of which are positioned on a single weighing device, such as an electronic load cell. At least one of the fluid fractions is subsequently removed from its fluid fraction container and returned to the human subject or other fluid source. Weights recorded by the single weighing device are then utilized to calculate the actual weights of fluid and/or fluid fractions pumped by at least one pump during the procedure. Such actual weights of fluid and/or fluid fractions are then utilized to calculate new pump flow constants, thereby enabling the calibration of the pump(s) to be corrected, on the basis of such new pump flow constants, prior to subsequent utilization of the pump(s) for pumping the fluid and/or fluid fractions. The single weighing device may also be utilized to monitor the weight change or rate of weight change occurring as the fluid fractions are pumped into and/or out of the fluid fraction containers, thereby providing a means for monitoring and verifying the pressures and flow rates within the system.
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Patent Agency Ranking
公开(公告)号：DE69323621T2
公开(公告)日：1999-09-02
申请号：DE69323621
申请日：1993-05-28
Applicant: BAXTER INT
Inventor： DENIEGA JOSE , DUFF DANIEL , SCHOENDORFER DONALD , MILLER WILLIAM
Abstract: Methods and devices for separating leukocytes from a leukocyte contaminated blood fraction by use of a rotating membrane filter apparatus. The invention includes methods/devices for preparing substantially leukocyte free platelet concentrate for therapeutic use. The devices of the invention include a rotating membrane filter apparatus for leukocyte separation as well as tubing harness/component systems (FIGS. 2a, 2b, 2c) useable in connection with automated apheresis instruments.
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公开(公告)号：DE69323621D1
公开(公告)日：1999-04-01
申请号：DE69323621
申请日：1993-05-28
Applicant: BAXTER INT
Inventor： DENIEGA JOSE , DUFF DANIEL , SCHOENDORFER DONALD , MILLER WILLIAM
Abstract: Methods and devices for separating leukocytes from a leukocyte contaminated blood fraction by use of a rotating membrane filter apparatus. The invention includes methods/devices for preparing substantially leukocyte free platelet concentrate for therapeutic use. The devices of the invention include a rotating membrane filter apparatus for leukocyte separation as well as tubing harness/component systems (FIGS. 2a, 2b, 2c) useable in connection with automated apheresis instruments.
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公开(公告)号：CA2109837C
公开(公告)日：1998-07-14
申请号：CA2109837
申请日：1991-06-26
Applicant: BAXTER INT
Inventor： PRINCE PAUL R , MILLER WILLIAM , BENJAMIN GRANT STEVEN
Abstract: A simplified fluid separation method and device usable for various apheresis procedures, including plasmapheresis. At least one pump is utilized to draw a first fluid (e.g. whole blood) into a separation device. The separation device then operates to separate the fluid (e.g. whole blood) into first and second fluid fractions (e.g. a cell concentrate and blood plasma). The first and second fluid fractions are pumped from the separation device to separation first and second fluid fraction containers, both of which are positioned on a single weighing device, such as an electronic load cell. At least one of the fluid fractions is subsequently removed from its fluid fraction container and returned to the human subject or other fluid source. Weights recorded by the single weighing device are then utilized to calculate the actual weights of fluid and/or fluid fractions pumped by at least one pump during the procedure. Such actual weights of fluid and/or fluid fractions are then utilized to calculate new pump flow constants, thereby enabling the calibration of the pump(s) to be corrected, on the basis of such new pump flow constants, prior to subsequent utilization of the pump(s) for pumping the fluid and/or fluid fractions. The single weighing device may also be utilized to monitor the weight change or rate of weight change occurring as the fluid fractions are pumped into and/or out of the fluid fraction containers, thereby providing a means for monitoring and verifying the pressures and flow rates within the system.
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公开(公告)号：DE69119787D1
公开(公告)日：1996-06-27
申请号：DE69119787
申请日：1991-06-26
Applicant: BAXTER INT
Inventor： PRINCE PAUL R , MILLER WILLIAM , BENJAMIN GRANT S
Abstract: A simplified fluid separation method and device usable for various apheresis procedures, including plasmapheresis. At least one pump is utilized to draw a first fluid (e.g. whole blood) into a separation device. The separation device then operates to separate the fluid (e.g. whole blood) into first and second fluid fractions (e.g. a cell concentrate and blood plasma). The first and second fluid fractions are pumped from the separation device to separate first and second fluid fraction containers, both of which are positioned on a single weighing device, such as an electronic load cell. At least one of the fluid fractions is subsequently removed from its fluid fraction container and returned to the human subject or other fluid source. Weights recorded by the single weighing device are then utilized to calculate the actual weights of fluid and/or fluid fractions pumped by at least one pump during the procedure. Such actual weights of fluid and/or fluid fractions are then utilized to calculate new pump flow constants, thereby enabling the calibration of the pump(s) to be corrected, on the basis of such new pump flow constants, prior to subsequent utilization of the pump(s) for pumping the fluid and/or fluid fractions. The single weighing device may also be utilized to monitor the weight change or rate of weight change occurring as the fluid fractions are pumped into and/or out of the fluid fraction containers, thereby providing a means for monitoring and verifying the pressures and flow rates within the system.
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公开(公告)号：CA2109837A1
公开(公告)日：1992-12-27
申请号：CA2109837
申请日：1991-06-26
Applicant: BAXTER INT
Inventor： PRINCE PAUL R , MILLER WILLIAM , BENJAMIN GRANT S
Abstract: A simplified fluid separation method and device usable for various apheresis procedures, including plasmapheresis. At least one pump is utilized to draw a first fluid (e.g. whole blood) into a separation device. The separation device then operates to separate the fluid (e.g. whole blood) into first and second fluid fractions (e.g. a cell concentrate and blood plasma). The first and second fluid fractions are pumped from the separation device to separate first and second fluid fraction containers, both of which are positioned on a single weighing device, such as an electronic load cell. At least one of the fluid fractions is subsequently removed from its fluid fraction container and returned to the human subject or other fluid source. Weights recorded by the single weighing device are then utilized to calculate the actual weights of fluid and/or fluid fractions pumped by at least one pump during the procedure. Such actual weights of fluid and/or fluid fractions are then utilized to calculate new pump flow constants, thereby enabling the calibration of the pump(s) to be corrected, on the basis of such new pump flow constants, prior to subsequent utilization of the pump(s) for pumping the fluid and/or fluid fractions. The single weighing device may also be utilized to monitor the weight change or rate of weight change occurring as the fluid fractions are pumped into and/or out of the fluid fraction containers, thereby providing a means for monitoring and verifying the pressures and flow rates within the system.
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