CA2198696A1 - Systems and methods for separating high hematocrit red blood cell concentrations - Google Patents

Systems and methods for separating high hematocrit red blood cell concentrations

Info

Publication number
CA2198696A1
CA2198696A1 CA002198696A CA2198696A CA2198696A1 CA 2198696 A1 CA2198696 A1 CA 2198696A1 CA 002198696 A CA002198696 A CA 002198696A CA 2198696 A CA2198696 A CA 2198696A CA 2198696 A1 CA2198696 A1 CA 2198696A1
Authority
CA
Canada
Prior art keywords
systems
red blood
methods
blood cell
hematocrit value
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002198696A
Other languages
French (fr)
Other versions
CA2198696C (en
Inventor
Jose C. Deniega
Daniel H. Duff
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fenwal Inc
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2198696A1 publication Critical patent/CA2198696A1/en
Application granted granted Critical
Publication of CA2198696C publication Critical patent/CA2198696C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/30—Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/16—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes
    • A61M1/26—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes and internal elements which are moving
    • A61M1/262—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes and internal elements which are moving rotating
    • A61M1/265—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis with membranes and internal elements which are moving rotating inducing Taylor vortices
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/30—Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
    • A61M1/301—Details
    • A61M1/303—Details having a reservoir for treated blood to be returned
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/30—Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
    • A61M1/301—Details
    • A61M1/305—Control of inversion point between collection and re-infusion phase
    • A61M1/306—Pressure control, e.g. using substantially rigid closed or gas buffered or elastic reservoirs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/30—Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
    • A61M1/301—Details
    • A61M1/305—Control of inversion point between collection and re-infusion phase
    • A61M1/308—Volume control, e.g. with open or flexible containers, by counting the number of pump revolutions, weighing
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M1/00—Suction or pumping devices for medical purposes; Devices for carrying-off, for treatment of, or for carrying-over, body-liquids; Drainage systems
    • A61M1/14—Dialysis systems; Artificial kidneys; Blood oxygenators ; Reciprocating systems for treatment of body fluids, e.g. single needle systems for hemofiltration or pheresis
    • A61M1/30—Single needle dialysis ; Reciprocating systems, alternately withdrawing blood from and returning it to the patient, e.g. single-lumen-needle dialysis or single needle systems for hemofiltration or pheresis
    • A61M1/301—Details
    • A61M1/309—Details with trans-membrane pressure [TMP] increasing substantially continuously during arterial phase
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3379—Masses, volumes, levels of fluids in reservoirs, flow rates
    • A61M2205/3393—Masses, volumes, levels of fluids in reservoirs, flow rates by weighing the reservoir
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2209/00—Ancillary equipment
    • A61M2209/08—Supports for equipment
    • A61M2209/082—Mounting brackets, arm supports for equipment

Abstract

Blood separation systems and methods utilize a membrane separation device (52) comprising a gap (60) between a microporous membrane (64) and a surface (56) facing the microporous membrane (64), one of the microporous membrane (64) and the surface (56) being rotatable relative to the other to cause separation of whole blood in the gap (60) into plasma and concentrated red blood cells. The systems and methods include an inlet pump element (20) and a drive element (46) coupled to the membrane separation device (52) and the steps of commanding the inlet pump element (20) and the drive element (46) as a function of the known beginning hematocrit value to obtain concentrated red blood cells having a high end hematocrit value that remains substantially constant despite variances in the known beginning hematocrit value.
CA002198696A 1995-08-09 1996-05-22 Systems and methods for separating high hematocrit red blood cell concentrations Expired - Lifetime CA2198696C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/512,807 1995-08-09
US08/512,807 US5762791A (en) 1995-08-09 1995-08-09 Systems for separating high hematocrit red blood cell concentrations
PCT/US1996/007717 WO1997005938A1 (en) 1995-08-09 1996-05-22 Systems and methods for separating erythrocytes

Publications (2)

Publication Number Publication Date
CA2198696A1 true CA2198696A1 (en) 1997-02-20
CA2198696C CA2198696C (en) 2006-05-16

Family

ID=24040661

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002198696A Expired - Lifetime CA2198696C (en) 1995-08-09 1996-05-22 Systems and methods for separating high hematocrit red blood cell concentrations

Country Status (9)

Country Link
US (2) US5762791A (en)
EP (2) EP0784496B1 (en)
JP (1) JPH10507395A (en)
AT (2) ATE248011T1 (en)
AU (1) AU5932896A (en)
CA (1) CA2198696C (en)
DE (2) DE69633876T2 (en)
NO (1) NO971602L (en)
WO (1) WO1997005938A1 (en)

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ATE282442T1 (en) 2004-12-15
EP0784496B1 (en) 2003-08-27
DE69633876T2 (en) 2005-11-03
US5762791A (en) 1998-06-09
ATE248011T1 (en) 2003-09-15
AU5932896A (en) 1997-03-05
NO971602D0 (en) 1997-04-08
EP0784496A4 (en) 2000-07-26
WO1997005938A1 (en) 1997-02-20
EP0997158B1 (en) 2004-11-17
NO971602L (en) 1997-06-05
DE69629657D1 (en) 2003-10-02
DE69629657T2 (en) 2004-06-09
EP0997158A2 (en) 2000-05-03
CA2198696C (en) 2006-05-16
EP0784496A1 (en) 1997-07-23
EP0997158A3 (en) 2000-05-31
DE69633876D1 (en) 2004-12-23
JPH10507395A (en) 1998-07-21
US6080322A (en) 2000-06-27

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