Apparatus and method for separating and concentrating fluids containing multiple components

• US 7,914,689 B2
• Filed: 05/19/2008
• Issued: 03/29/2011
• Est. Priority Date: 05/24/2002
• Status: Expired due to Term

• Current Assignee: Biomet Manufacturing, LLC (Zimmer Biomet Holdings, Inc.)
• Original Assignee: Biomet Biologics LLC (Zimmer Biomet Holdings, Inc.)
• Inventors: Woodell-May, Jennifer E., Miller, Brandon, Higgins, Joel C., Leach, Michael D.
• Primary Examiner(s): Reifsnyder; David A
• Application Number:
  US12/123,132
• Publication Number:
  US 20080217264A1
• Time in Patent Office: 1,044 Days
• Field of Search: 210/782, 210/789, 210/360.1, 210/380.1, 210/516, 422/72, 422/101, 494/43, 494/50, 494/67, 604/6.01, 604/6.05, 604/6.15, 604/218, 604/403
• US Class Current: 210/782
• CPC Class Codes: B01D 17/0217 by centrifugal force
• CPC Class Codes: B01L 1/52 Transportable laboratories; Field kits
• CPC Class Codes: B01L 2200/026 Fluid interfacing between devices or objects, e.g. connectors, inlet details
• CPC Class Codes: B01L 2400/0409 centrifugal forces
• CPC Class Codes: B01L 2400/0478 pistons
• CPC Class Codes: B01L 3/502 with fluid transport, e.g. in multi-compartment structures centrifugal-type cuvettes G01N21/07; analysis by separation into components G01N30/00; automatic analysers G01N35/00
• CPC Class Codes: B01L 3/5021 Test tubes specially adapted for centrifugation purposes centrifuges B04B5/04
• CPC Class Codes: B01L 3/50215 using a float to separate phases
• CPC Class Codes: G01N 33/491 by separating the blood components G01N15/05 takes precedence
• CPC Class Codes: Y10T 436/25375 Liberation or purification of sample or separation of material from a sample [e.g., filtering, centrifuging, etc.]

Abstract

An apparatus is disclosed 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.

Claims

1. A method of enriching a scaffold for application relative to an anatomy, comprising:

connecting a first piston and a second piston with a connection member;

obtaining a volume of a first whole material;

placing at least a portion of the obtained volume of the first whole material into a container;

forming a first fraction of the first whole material by centrifuging the placed portion of the obtained volume of the first whole material placed in the container;

disposing the first piston relative to the second piston;

obtaining a volume of a second whole material that is different from the first whole material;

placing at least a portion of the obtained volume of the second whole material into the container;

forming a second fraction of the second whole material by centrifuging the placed portion of the obtained volume of the second whole material placed in the container;

containing at least a portion of both the first fraction and the second fraction near a first collection surface of the first piston; and

applying a selected portion of the first fraction and the second fraction to the scaffold.

2. The method of claim 1, further comprising:

providing a cannula in the connection member; and

drawing the portion of the first fraction and the second fraction through the cannula.

3. The method of claim 1, wherein connecting the first piston and the second piston includes fixing the connection member to the first piston;

and

slidably connecting the second piston to the connection member;

wherein the first piston is operable to move relative to the second piston along the connection member.

4. The method of claim 1 wherein connecting the first piston and the second piston includes:

fixing the first piston to a first section of the connection member; and

fixing the second piston to a second section of the connection member;

wherein the first piston and the second piston are immovable relative one another.

5. The method of claim 1, wherein containing the first fraction near the first collection surface of the first piston includes:

moving the first piston through the first whole material in conjunction with the second piston to collect at least the portion of the first fraction near the first collection surface.

6. The method of claim 1, further comprising:

moving the second piston relative to the first piston to at least assist in withdrawing the first fraction.

7. The method of claim 6, wherein the collection surface of the first piston is substantially complementary to a second collection surface of the second piston, wherein if the second piston including the second collection surface engages the first collection surface of the first piston there is substantially continuous contact between the first collection face and the second collection face;

wherein withdrawing the first fraction includes moving the second surface of the second piston into the first collection surface of the first piston.

8. The method of claim 1, wherein said first fraction and said second fraction are formed from at least one of a whole blood sample, a bone marrow aspirate, or combinations thereof.

9. The method of claim 1, further comprising:

forming a pressure relative to the first piston and the second piston lower than a pressure of the first whole material within the patient; and

wherein obtaining the volume of the first whole material includes withdrawing a selected volume of the first whole material from the patient directly into the container.

10. A system for enriched scaffolding for application relative to an anatomy, comprising:

a piston system including a first piston and a second piston connected with a connection member;

a container operable to contain a volume of a first whole material and the piston system; and

a collection area defined by the first piston;

wherein a first fraction of a first whole material is operable to be formed in the container by centrifuging the first whole material contained in the container;

wherein at least a portion of the first fraction is operable to be contained in the collection area of the first piston; and

wherein the first piston is operable to be moved relative to the second piston as constrained by the connection member;

wherein the second piston includes a second surface substantially complementary and mateable to the upper surface of the first piston;

wherein the first fraction is operable to be applied to a scaffold.

11. The system of claim 10 wherein said first piston includes an upper surface defining an angle relative to a central axis of the connection member of about 90°

to about 150°

.

12. A method of enriching a scaffold for application relative to an anatomy, comprising:

connecting a first piston and a second piston with a connection member;

obtaining a volume of a bone marrow aspirate material;

placing at least a portion of the obtained volume of the bone marrow aspirate material into a container;

forming a first fraction of the bone marrow aspirate material by centrifuging the placed portion of the obtained volume of the bone marrow aspirate material placed in the container;

containing at least a portion of the first fraction in a collection area of the first piston;

disposing the first piston relative to the second piston; and

applying the first fraction to the scaffold.

13. The method of claim 12, further comprising:

obtaining a volume of whole blood;

placing at least a portion of the obtained volume of the whole blood into the container;

forming a second fraction of the whole blood by centrifuging the placed portion of the obtained volume of the whole blood placed in the container; and

applying the second fraction and the first fraction to the scaffold.

14. The method of claim 13, further comprising containing at least a portion of the second fraction in the collection area of the first piston.

15. The method of claim 14, wherein the at least a portion of the first fraction and the at least a portion of the second fraction are both contained in the collection area simultaneously.

16. The method of claim 13, wherein the centrifugation of the placed portion of the obtained volume of the bone marrow aspirate material forms a third fraction of the bone marrow aspirate outside of the collection area of the first piston.

17. The method of claim 16, wherein the centrifugation of the placed portion of the obtained volume of the whole blood forms a fourth fraction of the whole blood outside of the collection area of the first piston.