Automated immunoassay analyzer with pictorial display of assay information

• US 5,316,726 A
• Filed: 12/04/1992
• Issued: 05/31/1994
• Est. Priority Date: 07/26/1991
• Status: Expired due to Fees

• Current Assignee: Cirrus Diagnostics, Inc. (Siemens AG)
• Original Assignee: Cirrus Diagnostics, Inc. (Siemens AG)
• Inventors: Giter, Gershon, Ross, Arthur F., Huebner, Victor R., Olson, Douglas R., Babson, Arthur L.
• Primary Examiner(s): Housel, James C.
• Assistant Examiner(s): SODERQUIST, ARLEN
• Application Number:
  US07/986,883
• Time in Patent Office: 543 Days
• Field of Search: 198/502.3, 250/361 C, 356/414, 356/418, 356/224, 364/188, 364/478, 364/496, 364/497, 364/500, 364/516, 422/63-65, 422/52, 422/67, 422/72, 435/7.94, 436/45, 436/47, 436/164, 436/172
• US Class Current: 422/65
• CPC Class Codes: G01N 2035/00356 Holding samples at elevated temperature (incubation)
• CPC Class Codes: G01N 2035/00435 Refrigerated reagent storage
• CPC Class Codes: G01N 2035/00524 Mixing by agitating sample carrier
• CPC Class Codes: G01N 2035/00752 bar codes
• CPC Class Codes: G01N 2035/0093 random access not determined by physical position
• CPC Class Codes: G01N 2035/0437 Cleaning cuvettes or reaction vessels
• CPC Class Codes: G01N 2035/0443 for reagents
• CPC Class Codes: G01N 2035/0467 Switching points ("aiguillages")
• CPC Class Codes: G01N 2035/1025 Fluid level sensing
• CPC Class Codes: G01N 2035/1032 Dilution or aliquotting
• CPC Class Codes: G01N 2035/1086 Cylindrical, e.g. variable angle
• CPC Class Codes: G01N 21/763 Bioluminescence
• CPC Class Codes: G01N 35/0092 Scheduling
• CPC Class Codes: G01N 35/0095 introducing urgent samples with priority, e.g. Short Turn Around Time Samples [STATS]
• CPC Class Codes: G01N 35/021 having a flexible chain, e.g. "cartridge belt", conveyor for reaction cells or cuvettes
• CPC Class Codes: G01N 35/025 having a carousel or turntable for reaction cells or cuvettes
• CPC Class Codes: Y10T 436/111666 Utilizing a centrifuge or compartmented rotor
• CPC Class Codes: Y10T 436/113332 with conveyance of sample along a test line in a container or rack

Abstract

An automated immunoassay analyzer includes a computer controlled instrument (10) and display (16). The display (16) provides a real-time presentation of all operations being performed within the instrument (10). A large number of samples can be loaded into the instrument (10), and the order of testing the samples can be rearranged according to a priority determined by the operator at any time. A wide variety of immunoassays can be performed on each sample and several different immunoassays can be performed on any one sample. Information related to the type of immunoassays being performed on particular samples is collected by a bar code reader (44) and this information is conveyed to the computer (12) for presentation on the display (16). The computer (12) tracks the progress of each immunoassay through the reaction circuit to the detection station (46). The time to completion for particular immunoassays as well as the concentration information for recently completed immunoassays is provided in a readily usable format. The immunoassay automation process is improved by performing the washing operation with an assay tube (26) which allows water to be expelled by centrifugal forces generated by rotating the tube about its longitudinal axis; rather, than by using more conventional aspirating equipment. Bound label is detected by chemiluminescence using a photomultiplier tube (96).

Claims

1. An automated immunoassay analyzer, comprising:

an instrument which includes

(i) a single platform loading station for receiving both sample tubes and assay tubes, said sample tubes containing a sample to be assayed and said assay tubes containing a bound biomaterial for selectively binding an analyte of interest in a sample wherein said different assay tubes may contain a bound biomaterial for binding the same or different analytes of interest,

(ii) means for identifying said sample tubes and said assay tubes and for generating identifying information for each of said sample tubes and said assay tubes wherein each of said sample tubes is identified and related to one or more of said assay tubes and wherein the number of related assay tubes for each sample tube can be the same or different,

(iii) a pipetting station having a pipetter for transferring sample from a sample tube to a related assay tube,

(iv) means for selecting a reagent to be added to said related assay tube for performing a particular assay in said related assay tube and for generating selection information corresponding to the selection of a reagent,

(v) an incubating station for incubating assay tubes containing sample and reagent,

(vi) a washing station for washing said bound biomaterial in said assay tube after said assay tubes have been incubated at said incubating station,

(vii) a detection station for detecting a quantity of analyte bound to said biomaterial in said assay tubes after said assay tubes have been washed at said washing station, said detection station producing a signal proportional to the concentration of analyte for each assay tube, and

(viii) an assay tube transport pathway connecting said loading station, said pipetting station, said incubating station, said washing station and said detection station, whereby said sample tubes and said assay tubes are separately transported from said loading station to said pipetting station, then said assay tubes are transported to said incubation station then to said washing station and finally to said detection station;

means, connected to said instrument, for monitoring said identifying information obtained from said means for identifying said sample tubes and said assay tubes, said selection information from said means for selecting said reagent, said signal proportional to the concentration of analyte from said detection station and a progression of said assay tubes in said assay tube transport pathway;

control means for automatic controlling of various components of the analyzer in a coordinated manner;

a display connected for said means for monitoring;

means for displaying a pictorial representation of said assay tube transport pathway and said means for selecting a reagent on said display;

means for presenting said identifying information in a pictorial format on said pictorial representation related to said progression of assay tubes in said assay tube transport pathway where the position of said assay tubes in said assay tube transport pathway and the assay being performed in each assay tube can be determined;

means for presenting said selection information on a pictorial format on said pictorial representation where the reagents selected can be determined; and

means for presenting said concentration information for said signal proportional to the quantity of analyte on said display which allows the concentration of an analyte in a particular sample to be determined.

2. An automated immunoassay analyzer as recited in claim 1 wherein said washing station comprises a means to rotate each of said assay tubes at high speed about its longitudinal axis, said assay tubes having a means for catching wash fluid expelled during said high speed rotation.

3. An automated immunoassay analyzer as recited in claim 1 wherein said loading station includes a loading platform with a channel therein for accepting both said sample tubes and said assay tubes at any point along a length of said channel, positioning of said sample tubes and assay tubes within said channel in said loading platform determining a processing order of said sample tubes and said assay tubes.

4. An automated immunoassay analyzer as recited in claim 1 wherein said means for selecting a reagent includes a reagent carousel with an associated bar code reader.

5. An automated immunoassay analyzer as recited in claim 4 wherein said reagent carousel has slots for holding a plurality of reagents, each of which has bar coded identifying information, and said means for selecting a reagent further includes a means for periodically determining a position for each reagent on said reagent carousel.

6. An automated immunoassay analyzer as recited in claim 1 wherein said means for identifying said sample and said assay tubes includes a bar code reader.

7. An automated immunoassay analyzer as recited in claim 1 wherein said detection station includes a means for detecting light.

8. An automated immunoassay analyzer as recited in claim 7 wherein said means for detecting light is a photomultiplier tube.

9. An automated immunoassay analyzer as recited in claim 1 further comprising a means for determining when a reagent is required by said means for selecting such that said reagent may be added.

10. An automated immunoassay analyzer as recited in claim 1 wherein said pipettor used at said pipetting station to transfer said sample from said sample tube to said related assay tube is also used in conjunction with said means for selecting a reagent to transfer a reagent to said related assay tube.

11. In an automated chemical analysis instrument having multiple stations for performing different functions on samples contained in test vessels, a pathway connecting each of the stations along which the test vessels are transported from one station to the next, and a device located at an end of the pathway for detecting a parameter for each of the samples contained in the test vessels, the improvement comprising:

a display;

means for assessing the state of operation of each of said multiple stations;

means for tracking the progress of each of said test vessels on said pathway connecting each of the different stations;

means for detecting a parameter of each of the test vessels; and

means for presenting a pictorial image on said display of said pathway connecting said multiple stations, said pathway connecting each of the different stations, and said test vessels, said means for presenting providing both a numerical presentation of said detected parameter and a pictorial presentation of the position of each of said test vessels on said pathway connecting each of the different stations, said means for presenting being supplied with status information from said means for assessing and said means for tracking and numerical information from said means for detecting.