Apparatus and method for separating and concentrating fluids containing multiple components
First Claim
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1. A method of withdrawing a material directly from a patient and collecting a selected fraction of the material, comprising:
- forming an access port to the patient;
forming a pressure differential between a collection container and the patient;
connecting the collection container to the port;
filling the collection container to a selected volume with the material; and
centrifuging the collection container containing the selected volume of the material to separate the material to form the selected fraction, wherein a separating member moves relative to a boundary of the selected fraction to substantially form a mechanical separation of the selected fraction.
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Abstract
An apparatus that allows for separating and collecting a fraction of a sample. The apparatus, when used with a centrifuge, allows for the creation of at least three fractions in the apparatus. It also provides for a new method of extracting the buffy coat phase from a whole blood sample. A buoy system that may include a first buoy portion and a second buoy member operably interconnected may be used to form at least three fractions from a sample during a substantially single centrifugation process. Therefore, the separation of various fractions may be substantially quick and efficient.
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Citations
22 Claims
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1. A method of withdrawing a material directly from a patient and collecting a selected fraction of the material, comprising:
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forming an access port to the patient; forming a pressure differential between a collection container and the patient; connecting the collection container to the port; filling the collection container to a selected volume with the material; and centrifuging the collection container containing the selected volume of the material to separate the material to form the selected fraction, wherein a separating member moves relative to a boundary of the selected fraction to substantially form a mechanical separation of the selected fraction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A method of withdrawing a material directly from a patient and collecting a selected fraction of the material, comprising:
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connecting a collection container directly to the patient; forming a pressure differential between the collection container and the patient; filling the collection container with the material; centrifuging the collection container including the material to separate the material to form the selected fraction, wherein a member having a specific gravity substantially tuned to the selected fraction moves to a position relative to the selected fraction when a force is applied to the collection container during centrifuging; and removing the selected fraction from the collection container. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method of withdrawing a material directly from a patient and collecting a selected fraction of the material, comprising:
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connecting a collection container directly to the patient, wherein there is first pressure differential between the collection container and the patient; forming a second pressure differential between the collection container and the patient, after connecting the collection container directly to the patient, wherein the second pressure differential is greater then the first pressure differential; filling the collection container with a selected volume of the material; centrifuging the collection container to cause a buoy to move within the container, wherein the buoy is operable to rest at a selected location to physically separate the selected fraction from another fraction of the material; and removing the selected fraction from a region between a top of the collection container and the buoy. - View Dependent Claims (18, 19, 20, 21, 22)
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Specification