Extra-corporeal dual stage blood processing method and apparatus
First Claim
1. A method for extracorporeal collection of blood components from a donor/patient comprising:
- removing blood from a donor/patient through a single needle;
flowing said blood into a dual stage blood processing vessel;
separating plasma from said blood within said blood processing vessel;
collecting at least a portion of said plasma in a plasma collection reservoir separate from said blood processing vessel;
separating red blood cells from said blood within said dual stage blood processing vessel;
collecting at least a portion of Mid separated red blood cells in a red blood cell collection reservoir separate from said blood processing vessel, wherein said plasma separation and collection steps are completed at least partially contemporaneously with said red blood cell separation and collection steps;
returning uncollected blood components of said blood to said donor/patient through said single needle; and
replacing fluid volume in said donor/patient by flowing a replacement fluid to said donor/patient through said single needle.
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Accused Products
Abstract
Methods and apparatus particularly involving the separation of blood into blood components and the collection of such components are disclosed. In one aspect, an extra-corporeal method for the collection of plasma and red blood cells is provided, wherein the collection of plasma and red blood cells may occur simultaneously or subsequently utilizing the same dual stage blood processing vessel. The flow of blood to the blood processing vessel and return of uncollected blood components may be provided via a single needle, wherein blood is removed from and returned to a donor/patient during alternating blood removal and blood return submodes. Platelet separation and collection options are also described. In either case, prior to red blood cell collection, a set-up phase may be carried out to set a predetermined hematocrit and AC ratio. Replacement fluid delivery may optionally also be provided either substantially continuously during any collection phase(s) and/or in a bolus mode.
112 Citations
28 Claims
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1. A method for extracorporeal collection of blood components from a donor/patient comprising:
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removing blood from a donor/patient through a single needle;
flowing said blood into a dual stage blood processing vessel;
separating plasma from said blood within said blood processing vessel;
collecting at least a portion of said plasma in a plasma collection reservoir separate from said blood processing vessel;
separating red blood cells from said blood within said dual stage blood processing vessel;
collecting at least a portion of Mid separated red blood cells in a red blood cell collection reservoir separate from said blood processing vessel, wherein said plasma separation and collection steps are completed at least partially contemporaneously with said red blood cell separation and collection steps;
returning uncollected blood components of said blood to said donor/patient through said single needle; and
replacing fluid volume in said donor/patient by flowing a replacement fluid to said donor/patient through said single needle. - 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)
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27. A device for extracorporeal separation and collection of blood components front a donor/patient, comprising:
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a centrifugal blood processing channel into which blood from a donor/patient is adapted to be flowed, and in which said blood is separated into at least separated plasma and separated red blood cells;
said centrifugal dual stage blood processing channel including a first stage and a second stage, the second stare being separated from said first stage by a dam, a blood inlet for communicating blood into the first stage, a plasma outlet disposed in the second stage and a red blood cell outlet disposed in the first stage;
said centrifugal blood processing channel being adapted to be used with;
a removable plasma collection reservoir operably connected to said centrifugal blood processing channel, whereby into which at least a portion of said separated plasma is collected;
a removable red blood cell collection reservoir operably connected to said blood processing channel whereby a portion of said separated red blood cells are collected in said red blood cell collection reservoir, and a replacement fluid assembly which is operably connectable to the donor/patient;
wherein said replacement fluid assembly is adapted to deliver replacement fluid to the donor/patient.
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28. A disposable blood tubing set adapted to be used with a device for extracorporeal separation and collection of blood components from a donor/patient, said disposable blood tubing set comprising:
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a disposable centrifugal dual stage blood processing vessel into which blood from a donor/patient is adapted to be flowed, and in which said blood is separated into at least separated plasma and separated red blood cells;
said centrifugal dual stage blood processing vessel including a firs;
stage and a second stage, the second stage being separated from said first stage by a dam, a blood inlet for communicating blood into the first stage, a plasma outlet disposed in the second stage and a red blood cell outlet disposed in the first stage;
a plasma collection reservoir operably connected to said centrifugal blood processing vessel, whereby into which said plasma collection reservoir at least a portion of said separated plasma is collected;
a red blood cell collection reservoir operably connected to said blood processing vessel whereby a portion of said separated red blood cells are collected in said red blood cell collection reservoir; and
a disposable fluid flow cassette assembly operably interconnected to said centrifugal blood processing vessel, said cassette assembly having an intermediate reservoir disposed therein, said intermediate reservoir being adapted to receive separated uncollected blood components from said centrifugal blood processing vessel; and
a replacement fluid assembly which is operably connected to said fluid flow cassette and said intermediate reservoir;
wherein said replacement fluid assembly is adapted to deliver replacement fluid to said intermediate reservoir for subsequent infusion of the replacement fluid into a donor/patient.
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Specification