Method for performing automated analysis

• US 5,891,734 A
• Filed: 07/17/1996
• Issued: 04/06/1999
• Est. Priority Date: 08/01/1994
• Status: Expired due to Term

• Current Assignee: Abbott Laboratories
• Original Assignee: Abbott Laboratories
• Inventors: Hove, Luc Van, Chupp, Vernon L., Gill, James E.
• Primary Examiner(s): Le, Long V.
• Application Number:
  US08/682,334
• Time in Patent Office: 993 Days
• Field of Search: 436/43, 436/54, 436/63, 436/172, 436/174, 436/175, 436/180, 436/546, 436/522, 436/548, 436/523, 436/805, 422/63, 422/67, 422/73, 422/82.08, 364/413.07, 364/413.08, 435/4, 435/6, 435/7.21, 435/7.24, 435/7.25, 435/34, 435/973, 356/39, 356/73, 356/335, 356/336
• US Class Current: 436/43
• CPC Class Codes: B01F 25/3132 by using two or more injector devices
• CPC Class Codes: B01F 25/31324 arranged concentrically
• CPC Class Codes: G01N 1/14 Suction devices, e.g. pumps; Ejector devices
• CPC Class Codes: G01N 15/14 Optical investigation techniques, e.g. flow cytometry
• CPC Class Codes: G01N 15/1404 Handling flow, e.g. hydrodynamic focusing
• CPC Class Codes: G01N 15/1459 the analysis being performed on a sample stream
• CPC Class Codes: G01N 2015/011 with lysing, e.g. of erythrocytes
• CPC Class Codes: G01N 2015/014 Reticulocytes
• CPC Class Codes: G01N 2015/018 Platelets
• CPC Class Codes: G01N 2015/1413 Hydrodynamic focussing
• CPC Class Codes: G01N 2035/00356 Holding samples at elevated temperature (incubation)
• CPC Class Codes: G01N 2035/00524 Mixing by agitating sample carrier
• CPC Class Codes: G01N 2035/1032 Dilution or aliquotting
• CPC Class Codes: G01N 35/0092 Scheduling
• CPC Class Codes: G01N 35/10 Devices for transferring samples or any liquids to, in, or from, the analysis apparatus, e.g. suction devices, injection devices G01N35/0099 takes precedence
• CPC Class Codes: G01N 35/1004 Cleaning sample transfer devices
• CPC Class Codes: G01N 35/109 with two horizontal degrees of freedom
• CPC Class Codes: G01N 35/1095 for supplying the samples to flow-through analysers for a specific analyser see relevant groups, e.g. under G01N15/00, G01N21/00, G01N27/00, G01N30/00, H01J49/00
• CPC Class Codes: Y10S 435/973 Simultaneous determination of more than one analyte
• CPC Class Codes: Y10S 436/805 Optical property
• CPC Class Codes: Y10T 436/11 : Automated chemical analysis
• CPC Class Codes: Y10T 436/25 : including sample preparation
• CPC Class Codes: Y10T 436/25125 : Digestion or removing interfering materials
• CPC Class Codes: Y10T 436/2575 : Volumetric liquid transfer

Abstract

Provided are automated methods for distinguishing and differentiating cells in a whole blood sample. In one of the methods, a whole blood sample is provided. One or more tests to be performed on the whole blood sample is selected. The tests to be performed on the whole blood sample are correlated. A volume of the whole blood sample is aspirated into an automated instrument system which automatically performs conventional hematology analysis and fluorescent cytometry analysis on the whole blood sample. A first aliquot of the whole blood sample is dispensed into at least one sample receiving vessel. The first aliquot of the whole blood sample is mixed with a fluorescent reagent. The first aliquot of the whole blood sample mixed with fluorescent reagent is diluted and transported through a flow transducer system. The flow transducer system detects multi-angle light scatter and fluorescence from the first aliquot of the whole blood sample mixed with fluorescent reagent and counts and differentiates platelets or platelet clumps or both in the sample. Detecting and differentiation data for the one or more tests performed on the whole blood sample are stored. Results of the one or more tests performed on the whole blood sample are reported in a quantitative manner if so requested. The instrument system automatically performs all method steps without physically separating cells from the whole blood sample or an aliquot of the sample and results of a conventional hematology analysis may be utilized in at least reporting of results of the fluorescent cytometry testing.

Claims

1. An automated method for distinguishing and differentiating cells in a whole blood sample with an automated instrument system capable of performing both hematology and fluorescent cytometry analysis to which the whole blood sample is provided, upon selection of a series of one or more tests to be performed on the whole blood sample by the automated instrument system, the automated method comprising the steps of:

(a) correlating the tests to be performed on the whole blood sample;

(b) aspirating a first volume of the whole blood sample;

(c) dispensing aliquots of the whole blood sample into at least three sample receiving vessels;

(d) diluting a first aliquot of the whole blood sample with a diluent reagent;

(e) lysing a second aliquot of the whole blood sample with a lysing reagent;

(f) mixing a third aliquot of the whole blood sample with a fluorescent reagent;

(g) transporting the first aliquot of diluted whole blood sample through an impedance flow transducer of the automated instrument system;

(h) detecting and counting red blood cells and platelets in the first aliquot of diluted whole blood sample with the impedance flow transducer;

(i) transporting the second aliquot of lysed whole blood sample through an optical flow transducer;

(j) detecting multi-angle light scatter from the second aliquot of lysed whole blood sample and counting and differentiating white blood cells in the second aliquot of whole blood sample with the optical flow transducer;

(k) detecting multi-angle light scatter and fluorescence from the second aliquot of lysed whole blood sample or the first aliquot of diluted whole blood sample and counting and differentiating nucleated red blood cells or reticulocytes or both therein with the optical flow transducer;

(l) transporting the third aliquot of the whole blood sample through the optical flow transducer;

(m) detecting multi-angle light scatter and fluorescence from the third aliquot of whole blood sample and counting and differentiating platelets or platelet clumps or both therein with the optical flow transducer;

(n) storing detecting and differentiating data for multiple tests performed on the whole blood sample; and

(o) reporting results of each of the multiple tests performed on the whole blood sample in a quantitative manner if so requested,

wherein the instrument system automatically performs all method steps without physically separating cells from the whole blood sample or an aliquot thereof and results of the hematology analysis may be utilized in at least reporting of results of fluorescent cytometry testing.

2. The method of claim 1 further comprising the steps of:

(p) staining the first aliquot of the whole blood sample; and

(q) transporting the stained first aliquot through the optical flow transducer, wherein reticulocytes are counted and differentiated from the stained first aliquot with the optical flow transducer.

3. The method of claim 1 wherein data detected by the impedance flow transducer is utilized to produce quantitative red blood cell and platelet results.

4. The method of claim 1 wherein the first aliquot of the whole blood sample is transported through the optical flow transducer and multi-angle light scatter is detected with the optical flow transducer to count and differentiate platelets in the first aliquot.

5. The method of claim 1 wherein the fluorescent reagent is comprised of one or more monoclonal antibodies conjugated with one or more fluorochromes.

6. The method of claim 5 wherein one of the monoclonal antibodies is anti-CD61 and the fluorochrome is FITC.

7. The automated method of claim 1 wherein a reported quantitative platelet result is obtained from multi-angle light scatter and fluorescent detected data.

8. The method of claim 1 wherein a receiving vessel for the whole blood sample to be mixed is a disposable vessel containing a pre-measured amount of one or more monoclonal antibodies conjugated with one or more monoclonal antibodies.