|Publication number||US3901658 A|
|Publication date||Aug 26, 1975|
|Filing date||Jul 30, 1974|
|Priority date||Jul 30, 1974|
|Publication number||US 3901658 A, US 3901658A, US-A-3901658, US3901658 A, US3901658A|
|Inventors||Carl A Burtis, Wayne F Johnson|
|Original Assignee||Us Energy|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (3), Referenced by (81), Classifications (7)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States Patent [1 1 Burtis et al.
[ WHOLE BLOOD ANALYSIS ROTOR ASSEMBLY HAVING REMOVABLE CELLULAR SEDIMENTATION BOWL  Inventors: Carl A. Burtis, Knoxville; Wayne F.
Johnson, Loudon, both of Tenn.
 Assignee: The United States of America as represented by the United States Energy Research and Development Administration, Washington, DC.
22 Filed: July 30,1974
 U5. Cl. 23/259; 233/26; 356/39; 356/246  Int. Cl. 1. B04B 5/12; GOlN 33/16; G01N 21/00; GOlN 1/10 [581 Field of Search 23/253 R, 259; 356/39, 356/197, 246; 233/26  References Cited UNITED STATES PATENTS Maddox et al 23/259 51 Aug. 26, 1975 Mailen 23/259 Mailen 23/259 X Primary Examiner-Morris O. Wolk Assistant ExaminerTimothy W. Hagan Attorney, Agent, or FirmDean E. Carlson; David S. Zachry; Stephen D. Hamel 7 ABSTRACT A rotor assembly for performing photometric analyses using whole blood samples. Following static loading of a gross blood sample within a centrally located, removable, cell sedimentation bowl, the red blood cells in the gross sample are centrifugally separated from the plasma, the plasma displaced from the sedimentation bowl, and measured subvolumes of plasma distributed to respective sample analysis cuvettes positioned in an annular array about the rotor periphery. Means for adding reagents to the respective cuvettes are also described.
7 Claims, 1 Drawing Figure WHOLE BLOOD ANALYSIS ROTOR ASSEMBLY HAVING REMOVABLE CELLULAR SEDIMENTATION BOWL BACKGROUND OF THE INVENTION The invention described herein relates generally to photometers and more particularly to an improved whole blood analysis rotor assembly for a multi-station dynamic photometer of the rotary cuvette type. It was made in the course of, or under, a contract with the U.S. Atomic Energy Commission.
Fast photometric analyzers incorporating multistation rotary cuvette systems are becoming widely used in various laboratories because of their ability to rapidly and accurately analyze large numbers of samples. Of particular interest are blood tests including glucose, LDl-I, SGOT, SGPT, BUN, total protein, alkaline, phosphatase, bilirubin, calcium, chloride, sodium, potassium, and magnesium. Since such tests are normally performed on blood plasma, blood cells must be removed from whole blood samples prior to analysis. Cuvette rotors designed to accept and automatically process whole blood samples must, therefore, be capable of separating plasma from cellular material. In addition, such rotors must be designed for receiving a sample in a loading operation, measuring discrete subvolumes of separated plasma from each sample analysis cuvette and transferring the subvolumes into respective cuvettes.
One rotor assembly which has been designed to accept and automatically process whole blood samples is described in copending application Ser. No. 489,305 of common assignee. That rotor is difficult to clean since red cells are closely packed within capillary sized passageways during a centrifugal separation operation de signed to separate the plasma and cellular components. Also, because of its design which requires that part (about half) of a sample be wasted, blood volumes are required greatly in excess of that used in the actual analyses.
It is, accordingly, a general object of the invention to provide an improved rotor for a multi-station photometric analyzer which is suitable for use in performing whole blood analyses.
Another more particular object of the invention is to provide an improved rotor for a multi-station photometric analyzer suitable for receiving a whole blood sample, centrifuging the whole blood sample to separate it into cellular and plasma components, measuring discrete plasma subvolumes, and transferring the subvolumes to respective sample analysis cuvettes.
Another particular object of the invention is to provide an improved rotor for a multi-station photometric analyzer suitable for receiving a whole blood sample wherein sedimented cellular components are readily removable following sample analysis.
Still another object of the invention is to provide an improved rotor for a multi-station photometric analyzer suitable for receiving a whole blood sample wherein the volume of blood required for analysis is minimized.
Other objects of the invention will be apparent from an examination of the following written description of the invention and the appended drawings.
SUMMARY OF THE INVENTION In accordance with the invention, an improved rotor assembly is provided for use in performing whole blood analyses in a multi-station photometric analyzer. Included in the rotor assembly is a generally disk-shaped main rotor body and a removable sedimentation bowl nested within the main rotor body and adapted to rotate with that body as a unit. Features defined by the main rotor body include: an annular plasma distribution manifold for receiving plasma displaced from the sedimentation bowl, volume measuring chambers and passageways for receiving plasma from the distribution manifold, means for receiving plasma overflow from the distribution manifold, sample analysis cuvettes disposed in a circular array about the rotor periphery and means for loading reagents into the sample analysis cuvettes. The removable sedimentation bowl includes a hollow disk-shaped base portion and an upstanding annular neck portion through which whole blood samples are statically loaded into the base portion and through which separated plasma is displaced under dynamic operating conditions. Using the subject improvedrotor assembly, cellular components are removed from whole blood samples and retained in the sedimentation bowl which can be cleaned between operations or disposed of and replaced with a new bowl.
DESCRIPTION OF THE PREFERRED EMBODIMENT Referring now to the drawing, which is a top, cut away, isometric view of a rotor assembly made in accordance with the invention, the rotor assembly is seen to include a sedimentation bowl 1 and a disk-shaped main rotor body 2. The sedimentation bowl is shaped to, nest concentrically within the rotor body at the level of the rotor body base and to rotate upon a turntable (not shown) with the rotor body as a unit. As shown, the sedimentation bowl comprises a shallow, hollow, disk-shaped base portion 3 and an upstanding annular neck portion 4 through which whole blood samples may be statically loaded into the base portion and separated plasma displaced under dynamic operating conditions. Neck portion 4 is provided with a slightly tapered inner surface having a larger diameter at its end which is fixed to base portion 3 to ensure movement of displacing liquid into the base portion during a plasma displacing operation. The main rotor body in the preferred embodiment is a vertically stacked, laminar construction comprising a base 5, a divider plate 6, a chamber plate 7, and capping plate 8. The base plate 5 is an annulus of transparent material which provides lower windows for the sample analysis cuvettes which is sized to provide an opening for receiving sedimentation bowl 1. Divider plate 6 is annular shaped and extends centripetally beyond the inner periphery of the base 5, permitting upward projection of the neck portion 4 therethrough. The divider plate 6 functions as a vertical retainer for the sedimentation bowl and as a lower wall for an annular plasma distribution manifold 9 formed in the centripetal region between divider plate 6 and a tapered portion of the chamber plate 7. i
The chamber plate 7 is, in comparison with the outer laminations, a thick annulus which provides a matrix defining the main functional chambers and inner connecting passageways as described below. The annular plasma distribution manifold 9 is formed by relieving a shallow conical portion of the matrix from the lower centripetal edge of the chamber plate. Plasma distribution manifold 9 extends from axially below to axially above the upper extremity of neck portion 4 when, as
shown, sediment bowl 1 is fully inserted within the main rotor body in operating position. A multiplicity (only one shown) of plasma volumetric measuring chambers are disposed in a circular array and displaced axially above and radially overlapping the distribution manifold 9. Plasma inlet ports 11 extend axially and provide liquid communication between distribution manifold 9 and each measuring chamber 10 to permit passage of plasma from the plasma distribution manifold to the respective measuring chambers. Ports 11 are precisely located on a common radius to facilitate equal filling of chambers 10 under centrifugal conditions. The measuring chambers 10 are vented to manifold 9 by means of vent ports 12 located centripetal to the plasma inlet ports 11.
A circular array of sample analysis cuvettes 13 is located peripherally within the divider plate 6 and chamber plate 7. Sample analysis cuvettes 13 are equal in number to, and are somewhat angularly offset from respective plasma measuring chambers 10. One reference cuvette, which is not in communication with a plasma measuring chamber 10, may be provided for photometric blank solutions. Corresponding measuring chambers 10 and sample analysis cuvettes 13 are in communication through corresponding folded passageways 14 which extend from the centrifugal extremity of each measuring chamber 10 and the centripetal extremity of each sample analysis cuvette 13. Each passageway 14 comprises three interconnected, radially extended segments which describe an N shaped path with a first segment 14a extending from the measuring chamber radially outward to a point about equal to the radius at which sample analysis cuvettes 13 are disposed, a second segment 14b extending radially inward from the centrifugal end of the first segment to a point centripetal to the circle upon which commonly lie the plasma inlet ports 11, and a third segment 14c extending radially outward from the centripetal end of the second segment to a sample analysis cuvette 13. At least one plasma overflow chamber 15 is defined within the matrix of the divider plate 6 in a generally peripheral location. The overflow chamber 15 is in communication with plasma distribution manifold 9 by means of an overflow passageway 16 which enters the distribution manifold 9 at a point just centripetal to the circle upon which lie plasma inlet ports 1 l. Overflow passage way 16 extends from plasma distribution manifold 9 upward to the top of the chamber plate 7, and then centrifugally to enter the overflow chamber 15.
As shown, each sample analysis cuvette 13 is provided with a cleanout passageway 17 extending from its lower centripetal extremity to the cavity which is formed in base 5 upon removal of sedimentation bowl 1 from its operating position. Plasma overflow chamber 15 may likewise be provided with a cleanout passageway.
Capping plate 8 is superimposed on chamber plate 7 partially to provide a top closure for the measuring chambers 10, sample analysis cuvettes 13, passageways 14, plasma overflow chamber 15 and overflow passageways 16. The capping plate also provides a matrix for forming reagent loading ports 18 (only 1 shown) which permit direct loading access to each sample analysis cuvette from the topside of the rotor assembly. Second cleanout passageways 19 extend between the reagent loading ports 18 and the centripetal extremity 20 of annular capping plate 8 to provide for fluid cleaning of the sample analysis cuvettes as do the first cleanout passageways 17.
In operation, diverse test reagents are pipetted into the sample analysis cuvettes 13 through the reagent loading ports 18 while the rotor is kept stationary. Whole blood is statically loaded within sedimentation bowl 1 and then centrifuged at about 4000 RPM to sediment cellular components in the periphery of the hollow base portion of the bowl. A comparatively dense, water immiscible liquid, e.g., a halocarbon oil, is added to the sedimented blood under the same dynamic conditions to displace plasma centripetally and upwardly through the neck portion 4 of the sedimentation bowl. The volume of displacing liquid is predetermined to slightly exceed the total volume of the measuring system defined by chambers 10 and passageways 14, in order that the measuring system will fill, yet not overflow in volume exceeding that of the overflow chamber 15. The displaced plasma spills over the top of neck portion 4 and is caught within distribution manifold 9. The plasma then passes through inlet ports 11 into plasma measuring chambers 10 and corresponding passageways 14 until it reaches the limiting centripetal level as defined by plasma overflow passagway 16. Excess plasma flows through overflow passageway 16 into the overflow chamber 15. The thus measured plasma subvolumes are displaced from the measuring chambers 10 and passageways 14 into respective sample analysis cuvettes by intermittent application of air pressure to the open center portion of capping plate 8, while maintaining rotation of the entire rotor assembly at about 1000 RPM. It is necessary to predetermine the combined volume of reagent and plasma samples to be sufficient for photometric measurement, without overfilling the sample analysis cuvettes to the point where liquid could be lost by way of the cleanout passageways 17.
The above described preferred embodiment and method of operation is intended to be illustrative and should not be interpreted in a limiting sense. For example, particulate suspensions other than whole blood could be processed to remove particulates and the clarified supernatant analyzed. Also, the particular manner in which reagents are loaded into the sample analysis cuvettes could differ from that illustrated in that separate reagent loading cavities could be provided which communicate by means of suitable passageways with respective sample analysis cuvettes. It is intended rather, that the invention be limited in scope only by the following claims.
What is claimed is:
1. A rotor assembly for a photometric solution analyzer of the rotary cuvette type suitable for use in analyzing whole blood samples comprising:
a. a generally disk-shaped main rotor body defining:
i. an annular plasma distribution manifold;
ii. a plurality of volume measuring chambers distributed in a circular array, said volume measuring chambers being in liquid flow communication with said plasma distribution manifold;
iii. means limiting the centripetal level of plasma in said volume measuring chambers during operation of said rotor;
iv. a plurality of sample analysis cuvettes disposed in a circular array about the periphery of said main rotor body, said sample analysis cuvettes being in liquid communication with said volume measuring chambers; and
v. means for loading reagents into said sample analysis cuvettes; and
b. a sedimentation bowl nested within said main rotor body and adapted to rotate with that body as a unit,
said sedimentation bowl comprising:
i. a hollow disk-shaped base portion, said base portion having a centrally located top opening for receiving whole blood samples and discharging displaced plasma; and
ii. an upstanding, open-ended, annular neck portion integrally fixed to said base portion in register with said top opening, the top end of said neck portion terminating within the center of said annular plasma distribution chamber within a plane axially intermediate to the axial extremities of such chamber.
2. The rotor assembly of claim 1 wherein said sedimentation bowl is removably nested within said main rotor body.
3. The rotor assembly of claim 1 further including a plurality of passageways communicating between said sample analysis cuvettes and said volume measuring chambers, each of said passageways comprising three radially extending interconnected passageway segments; a first segment extending radially from a respective sample analysis cuvette to a point centripetal to the, centripetal ends of said volume measuring chambers, a
second segment extending from the centripetal end of said first segment to a point centrifugal to said volume measuring chambers, and a third segment extending from the centrifugal end of said second segment to the centrifugal end of a respective volume measuring chamber.
4. The rotor assembly of claim 1 wherein said volume measuring chambers are axially displaced from said plasma distribution manifold with the centripetal ends of said volume measuring chambers radially overlapping the centrifugal extremity of said plasma distribution manifold.
5. The rotor assembly of claim 4 wherein axially extending plasma inlet ports communicate between said plasma distribution manifold and respective volume measuring chambers, said inlet ports being disposed on a common radius about the center of rotation of said rotor assembly.
6. The rotor assembly of claim 5 wherein said means limiting the centripetal level of plasma in said volume measuring chambers comprises a plasma overflow chamber and a plasma overflow passageway communicating between said plasma distribution manifold and said plasma overflow chamber.
7. The rotor assembly of claim 6 wherein said overflow passageway communicates with said plasma distribution manifold at a radius centripetal to the common radius on which said plasma inlet ports are disposed.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3744974 *||Nov 30, 1971||Jul 10, 1973||Atomic Energy Commission||Loading disk for photometric analyzer of rotary cuvette type|
|US3744975 *||Dec 9, 1971||Jul 10, 1973||Atomic Energy Commission||Rotor for multistation photometric analyzer|
|US3795451 *||Apr 24, 1973||Mar 5, 1974||Atomic Energy Commission||Rotor for fast analyzer of rotary cuvette type|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US4030888 *||Feb 17, 1976||Jun 21, 1977||Toa Medical Electronics Co., Ltd.||Automatic blood analyzer|
|US4035156 *||Jan 21, 1977||Jul 12, 1977||The United States Of America As Represented By The United States Energy Research And Development Administration||Filter type rotor for multistation photometer|
|US4256696 *||Jan 21, 1980||Mar 17, 1981||Baxter Travenol Laboratories, Inc.||Cuvette rotor assembly|
|US4274885 *||Jul 19, 1979||Jun 23, 1981||Swartout Bobbye J||Method for washing centrifugal analyzer test disks|
|US4284602 *||Dec 10, 1979||Aug 18, 1981||Immutron, Inc.||Integrated fluid manipulator|
|US4385115 *||Oct 22, 1980||May 24, 1983||Hoffmann-La Roche Inc.||Diagnostics testing devices and processes|
|US4431606 *||May 1, 1981||Feb 14, 1984||Hoffmann-La Roche Inc.||Multicuvette rotor for analyzer|
|US4469793 *||Apr 7, 1982||Sep 4, 1984||Jean Guigan||Method and apparatus for dispensing a predetermined dose of a sample liquid into a receptor cell|
|US4576796 *||Jan 18, 1984||Mar 18, 1986||Pelam, Inc.||Centrifugal tissue processor|
|US4656009 *||Sep 27, 1984||Apr 7, 1987||Le Materiel Biomedical||Reaction support incorporating multiple recipients for testing liquid doses|
|US4663296 *||Oct 26, 1983||May 5, 1987||Hoffmann-La Roche Inc.||Multicuvette rotor for analyzer|
|US4756884 *||Jul 1, 1986||Jul 12, 1988||Biotrack, Inc.||Capillary flow device|
|US4817453 *||Jan 22, 1988||Apr 4, 1989||E. I. Dupont De Nemours And Company||Fiber reinforced centrifuge rotor|
|US4835106 *||Jul 17, 1987||May 30, 1989||Martin Marietta Energy Systems, Inc.||Rotor for processing liquids using movable capillary tubes|
|US4963498 *||Jan 15, 1988||Oct 16, 1990||Biotrack||Capillary flow device|
|US5061381 *||Jun 4, 1990||Oct 29, 1991||Abaxis, Inc.||Apparatus and method for separating cells from biological fluids|
|US5160702 *||Jan 17, 1989||Nov 3, 1992||Molecular Devices Corporation||Analyzer with improved rotor structure|
|US5173193 *||Apr 1, 1991||Dec 22, 1992||Schembri Carol T||Centrifugal rotor having flow partition|
|US5186844 *||Apr 1, 1991||Feb 16, 1993||Abaxis, Inc.||Apparatus and method for continuous centrifugal blood cell separation|
|US5242606 *||Oct 29, 1991||Sep 7, 1993||Abaxis, Incorporated||Sample metering port for analytical rotor having overflow chamber|
|US5286454 *||Apr 25, 1990||Feb 15, 1994||Nilsson Sven Erik||Cuvette|
|US5300779 *||Aug 18, 1992||Apr 5, 1994||Biotrack, Inc.||Capillary flow device|
|US5610074 *||Feb 24, 1993||Mar 11, 1997||Beritashvili; David R.||Centrifugal method and apparatus for isolating a substance from a mixture of substances in a sample liquid|
|US5650334 *||Aug 31, 1995||Jul 22, 1997||First Medical, Inc.||Fluorescent labelling compositions and methods for their use|
|US6299839||Aug 31, 1995||Oct 9, 2001||First Medical, Inc.||System and methods for performing rotor assays|
|US6692701 *||Dec 9, 2002||Feb 17, 2004||V & P Scientific, Inc.||Microarrayer|
|US6743632 *||Mar 14, 2001||Jun 1, 2004||Universities Space Research Association||Directional acceleration vector-driven displacement of fluids (DAVD-DOF)|
|US7026131||Nov 15, 2002||Apr 11, 2006||Nagaoka & Co., Ltd.||Methods and apparatus for blood typing with optical bio-discs|
|US7033747||Apr 11, 2002||Apr 25, 2006||Nagaoka & Co., Ltd||Multi-parameter assays including analysis discs and methods relating thereto|
|US7061594||Nov 9, 2001||Jun 13, 2006||Burstein Technologies, Inc.||Disc drive system and methods for use with bio-discs|
|US7087203||Nov 19, 2001||Aug 8, 2006||Nagaoka & Co., Ltd.||Methods and apparatus for blood typing with optical bio-disc|
|US7157049||Nov 13, 2002||Jan 2, 2007||Nagaoka & Co., Ltd.||Optical bio-discs and fluidic circuits for analysis of cells and methods relating thereto|
|US7200088||Jan 10, 2002||Apr 3, 2007||Burstein Technologies, Inc.||System and method of detecting investigational features related to a sample|
|US7221632||Jul 12, 2002||May 22, 2007||Burstein Technologies, Inc.||Optical disc system and related detecting methods for analysis of microscopic structures|
|US7390464||Jul 26, 2004||Jun 24, 2008||Burstein Technologies, Inc.||Fluidic circuits for sample preparation including bio-discs and methods relating thereto|
|US7582049 *||Feb 8, 2006||Sep 1, 2009||Caridianbct, Inc.||Fluid separation devices, systems and/or methods using a centrifuge and roller pump|
|US7582472||Jul 26, 2004||Sep 1, 2009||Smith Kenneth E||Apparatus and method for liquid sample testing|
|US7914753||Mar 29, 2011||Industrial Technology Research Institute||Analytical system, and analytical method and flow structure thereof|
|US8956879||Feb 19, 2013||Feb 17, 2015||Panasonic Healthcare Co., Ltd.||Analysis device and method using the same|
|US20020076354 *||Nov 30, 2001||Jun 20, 2002||Cohen David Samuel||Apparatus and methods for separating components of particulate suspension|
|US20020098528 *||Nov 19, 2001||Jul 25, 2002||Gordon John F.||Methods and apparatus for blood typing with optical bio-disc|
|US20020122364 *||Nov 9, 2001||Sep 5, 2002||Worthington Mark Oscar||Disc drive system and methods for use with bio-discs|
|US20020176342 *||Jan 10, 2002||Nov 28, 2002||Worthington Mark Oscar||Optical disc analysis system including related methods for biological and medical imaging|
|US20030035352 *||Jul 12, 2002||Feb 20, 2003||Worthington Mark Oscar||Optical disc system and related detecting methods for analysis of microscopic structures|
|US20030104486 *||Nov 20, 2001||Jun 5, 2003||Selvan Gowri Pyapali||Methods and apparatus for detecting and quantifying lymphocytes with optical biodiscs|
|US20030113925 *||Sep 6, 2002||Jun 19, 2003||Gordon John Francis||Nuclear morphology based identification and quantification of white blood cell types using optical bio-disc systems|
|US20030129665 *||Aug 29, 2002||Jul 10, 2003||Selvan Gowri Pyapali||Methods for qualitative and quantitative analysis of cells and related optical bio-disc systems|
|US20030143637 *||Aug 30, 2002||Jul 31, 2003||Selvan Gowri Pyapali||Capture layer assemblies for cellular assays including related optical analysis discs and methods|
|US20030219713 *||Nov 13, 2002||Nov 27, 2003||Valencia Ramoncito Magpantay||Optical bio-discs and fluidic circuits for analysis of cells and methods relating thereto|
|US20030224457 *||Nov 15, 2002||Dec 4, 2003||Hurt Susan Newcomb||Methods and apparatus for blood typing with optical bio-discs|
|US20030230383 *||Jul 24, 2002||Dec 18, 2003||Glenn Sasaki||Method and apparatus for bonded fluidic circuit for optical bio-disc|
|US20040241381 *||Jan 21, 2003||Dec 2, 2004||Chen Yihfar||Microfluidic structures with circumferential grooves for bonding adhesives and related optical analysis discs|
|US20050023765 *||Jan 23, 2003||Feb 3, 2005||Coombs James Howard||Bio-safety features for optical analysis disc and disc system including same|
|US20050037484 *||Apr 21, 2004||Feb 17, 2005||Norbert Staimer||Optical bio-discs including spiral fluidic circuits for performing assays|
|US20050047968 *||Jun 18, 2004||Mar 3, 2005||Horacio Kido||Fluidic circuits for sample preparation including bio-discs and methods relating thereto|
|US20050048597 *||Jul 26, 2004||Mar 3, 2005||Smith Kenneth E.||Apparatus and method for liquid sample testing|
|US20050084422 *||Jul 26, 2004||Apr 21, 2005||Horacio Kido||Fluidic circuits for sample preparation including bio-discs and methods relating thereto|
|US20050169804 *||Nov 16, 2004||Aug 4, 2005||Hach Company||User-configurable analytical rotor system|
|US20050169805 *||Nov 16, 2004||Aug 4, 2005||Hach Company||Analytical rotor system with a sample chamber|
|US20050170513 *||Nov 16, 2004||Aug 4, 2005||Hach Company||Analytical rotor system for titration testing|
|US20050170514 *||Nov 16, 2004||Aug 4, 2005||Hach Company||Analytical rotor system for method of standard additions testing|
|US20050170515 *||Nov 16, 2004||Aug 4, 2005||Hach Company||Analytical rotor system with an analytical signal path|
|US20050176059 *||Jan 17, 2003||Aug 11, 2005||Pal Andrew A.||Bio-safe dispenser and optical analysis disc assembly|
|US20050221048 *||Jan 24, 2003||Oct 6, 2005||James Rodney Norton||Manufacturing processes for making optical analysis discs including successive patterning operations and optical discs thereby manufactured|
|US20060122048 *||Feb 8, 2006||Jun 8, 2006||Gambro, Inc.||Fluid separation devices, systems and/or methods using a centrifuge and roller pump|
|US20060210449 *||Nov 15, 2005||Sep 21, 2006||Zoval Jim V||Optical biodiscs with reflective layers|
|US20070070848 *||Jun 9, 2006||Mar 29, 2007||Worthington Mark O||Disc drive system and methods for use with bio-discs|
|US20070166721 *||Jun 23, 2004||Jul 19, 2007||Phan Brigitte C||Fluidic circuits, methods and apparatus for use of whole blood samples in colorimetric assays|
|US20070274863 *||Jul 22, 2004||Nov 29, 2007||Horacio Kido||Fluidic circuits for sample preparation including bio-discs and methods relating thereto|
|US20070280859 *||Apr 27, 2007||Dec 6, 2007||Horacio Kido||Fluidic circuits for sample preparation including bio-discs and methods relating thereto|
|US20080062839 *||Apr 2, 2007||Mar 13, 2008||Worthington Mark O||Optical disc analysis system including related methods for biological and medical imaging|
|US20080094974 *||May 18, 2007||Apr 24, 2008||Burstein Technologies, Inc.||Optical disc system and related detecting methods for analysis of microscopic structures|
|US20130196360 *||Jan 25, 2013||Aug 1, 2013||Samsung Electronics Co., Ltd.||Microfluidic device and control method thereof|
|USRE30391 *||Feb 23, 1976||Sep 2, 1980||Abbott Laboratories||Chemical analysis cuvette|
|CN102879558B *||Oct 3, 2008||Sep 16, 2015||松下健康医疗器械株式会社||分析用仪器和使用该分析用仪器的分析装置及分析方法|
|EP0039825A1 *||Apr 29, 1981||Nov 18, 1981||F. HOFFMANN-LA ROCHE & CO. Aktiengesellschaft||Cuvette rotor for analyzer and method of operation of said cuvette rotor|
|EP0062907A1 *||Apr 8, 1982||Oct 20, 1982||Jean Guigan||Method and apparatus for delivering a predetermined amount of sample liquid to a cell|
|WO1990013016A1 *||Apr 25, 1990||Nov 1, 1990||Migrata Uk Ltd||Cuvette|
|WO1991018656A1 *||May 31, 1991||Dec 12, 1991||Abaxis, Inc.||Analytical rotors and methods for analysis of biological fluids|
|WO1993008893A1 *||Oct 27, 1992||May 13, 1993||Abaxis, Inc.||Sample metering port for analytical rotor|
|WO2002060583A1 *||May 18, 2001||Aug 8, 2002||V & P Scientific, Inc.||Microarrayer|
|U.S. Classification||494/16, 422/72, 356/39, 356/246|