Compact disk based system for separating immunomagnetic bead labeledparticulates and method thereof
First Claim
1. A disk based system for separating at least two types of particulates, which are respectively labeled and not labeled with immunomagnetic beads, contained in a sample fluid, the system comprising:
- a disk-like carrier board, which has a geometric center and an outer circumferential rim, the disk-like carrier board forming at least one flow channel structure, each flow channel structure comprising;
an inner reservoir, which is arranged adjacent to the geometric center of the disk-like carrier board for receiving the sample fluid,at least one separation chamber, which is arranged adjacent to the inner reservoir and is in fluid communication with the inner reservoir through at least one micro flow channel, andat least one outer reservoir, which is arranged between the outer circumferential rim of the disk-like carrier board and the separation chamber and is in fluid communication with the separation chamber through at least one micro flow channel; and
a magnetic attraction unit, which is arranged atop the disk-like carrier board and adjacent to the inner reservoir and the separation chamber to generate a magnetic force that has a predetermined distribution of intensity and covers the inner reservoir and the separation chamber;
wherein when the disk-like carrier board spins, the sample fluid is caused by a centrifugal force induced by the spinning of the disk-like carrier board to flow from the inner reservoir through the micro flow channels to the outer reservoir whereby the immunomagnetic bead labeled particulates, when passing through the separation chamber, are attracted by the magnetic force generated by the magnetic attraction unit to thereby remain in the separation chamber, and the non-labeled particulates entrain the sample fluid to flow from the inner reservoir through the micro flow channels to the outer reservoir.
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Accused Products
Abstract
Disclosed is a disk based system for separating at least two types of particulates contained in a sample fluid. The system includes a disk-like carrier board and a magnetic attraction unit. The disk-like carrier board forms at least one flow channel structure, which includes an inner reservoir, at least one separation chamber, and at least one outer reservoir arranged in sequence from a geometric center of the disk-like carrier board to an outer circumferential rim of the disk-like carrier board. A method of separation carried out with the system includes introducing the sample fluid into the inner reservoir and then rotating the disk-like carrier board to induce a centrifugal force. The sample fluid contains particulates that are labeled with immunomagnetic beads and the labeled particulates are attracted by the magnetic force generated by the magnetic attraction unit to retain in the inner reservoir or the separation chamber. Particulates not labeled with the immunomagnetic beads and contained in the sample fluid move with the sample fluid to the outer reservoir.
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Citations
22 Claims
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1. A disk based system for separating at least two types of particulates, which are respectively labeled and not labeled with immunomagnetic beads, contained in a sample fluid, the system comprising:
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a disk-like carrier board, which has a geometric center and an outer circumferential rim, the disk-like carrier board forming at least one flow channel structure, each flow channel structure comprising; an inner reservoir, which is arranged adjacent to the geometric center of the disk-like carrier board for receiving the sample fluid, at least one separation chamber, which is arranged adjacent to the inner reservoir and is in fluid communication with the inner reservoir through at least one micro flow channel, and at least one outer reservoir, which is arranged between the outer circumferential rim of the disk-like carrier board and the separation chamber and is in fluid communication with the separation chamber through at least one micro flow channel; and a magnetic attraction unit, which is arranged atop the disk-like carrier board and adjacent to the inner reservoir and the separation chamber to generate a magnetic force that has a predetermined distribution of intensity and covers the inner reservoir and the separation chamber; wherein when the disk-like carrier board spins, the sample fluid is caused by a centrifugal force induced by the spinning of the disk-like carrier board to flow from the inner reservoir through the micro flow channels to the outer reservoir whereby the immunomagnetic bead labeled particulates, when passing through the separation chamber, are attracted by the magnetic force generated by the magnetic attraction unit to thereby remain in the separation chamber, and the non-labeled particulates entrain the sample fluid to flow from the inner reservoir through the micro flow channels to the outer reservoir. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for separating particulates labeled with immunomagnetic beads, wherein a disk-like carrier board forms at least one flow channel structure thereon, each flow channel structure comprising an inner reservoir arranged adjacent to a geometric center of the disk-like carrier board, at least one separation chamber arranged in fluid communication with the inner reservoir through at least one micro flow channel, and at least one outer reservoir arranged between an outer circumferential rim of the disk-like carrier board and the separation chamber and in fluid communication with the separation chamber through at least one micro flow channel, a magnetic attraction unit being arranged atop the disk-like carrier board and adjacent to the inner reservoir and the separation chamber to generate a magnetic force that has a predetermined distribution of intensity and covers the inner reservoir and the separation chamber, the method comprising the following steps:
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(a) introducing a sample fluid containing at least two types of particulates, which are respectively labeled and not labeled with immunomagnetic beads, into the inner reservoir; (b) spinning the disk-like carrier board with a first predetermined rotation speed so that the sample fluid is caused by a centrifugal force induced by the spinning of the disk-like carrier board to flow from the inner reservoir through the micro flow channel into the separation chamber with a portion of the immunomagnetic-bead-labeled particulates is attracted by the magnetic force that is generated by the magnetic attraction unit and covers the inner reservoir to retain in the inner reservoir; (c) subjecting a remaining portion of the immunomagnetic bead labeled particulates to attraction by the magnetic force that is generated by the magnetic attraction unit and covers the separation chamber to retain in the separation chamber; and (d) collecting the non-immunomagnetic-bead-labeled particulates, which entrain the sample fluid through the micro flow channel, in the outer reservoir. - View Dependent Claims (17, 18, 19, 20, 21, 22)
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Specification