Reagent handling system and reagent pack for use therein

• US 5,609,822 A
• Filed: 07/07/1995
• Issued: 03/11/1997
• Est. Priority Date: 07/07/1995
• Status: Expired due to Term

• Current Assignee: Siemens Healthcare Diagnostics Incorporated (Siemens AG)
• Original Assignee: CIBA Vision Corporation (Bayer AG)
• Inventors: Weber, David P., Carey, Glen A.
• Primary Examiner(s): Le, Long V.
• Application Number:
  US08/499,271
• Time in Patent Office: 613 Days
• Field of Search: 422/63, 422/65, 422/100, 422/102, 422/103, 422/104, 436/43, 436/45, 436/49, 436/54, 436/174, 436/180, 436/807, 436/809, 366/210, 366/211, 366/216, 366/208, 366/209, 366/181.5, 366/235-239, 366/228, 366/336, 366/338, 220/669, 206/219
• US Class Current: 422/63
• CPC Class Codes: B01F 2101/23 Mixing of laboratory samples e.g. in preparation of analysing or testing properties of materials
• CPC Class Codes: B01F 33/50 Movable or transportable mixing devices or plants
• CPC Class Codes: B01F 35/50 Mixing receptacles
• CPC Class Codes: G01N 2035/00514 Stationary mixing elements
• CPC Class Codes: G01N 2035/00524 Mixing by agitating sample carrier
• CPC Class Codes: G01N 35/00 Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
• CPC Class Codes: G01N 35/1002 Reagent dispensers
• CPC Class Codes: Y10S 436/809 Multifield plates or multicontainer arrays
• CPC Class Codes: Y10T 436/11 Automated chemical analysis
• CPC Class Codes: Y10T 436/113332 with conveyance of sample along a test line in a container or rack
• CPC Class Codes: Y10T 436/2575 Volumetric liquid transfer

Abstract

A reagent pack for keeping fluids with or without suspensions mixed or suspended upon rocking. The reagent pack has at least one chamber divided into separate sub-chambers with a throat region between them defined by baffles for agitation of suspended reagent during rocking of the reagent pack. A continuous lid sealable to the pack has membrane sealed apertures in the lid for allowing access to the underlying chambers and sub-chambers by withdrawal needles. A tray is configured to hold multiple side-by-side reagent packs on respective slides that slide in and out for insertion and withdrawal of the packs. During operation, the tray and associated packs are rocked such as by being periodically inclined with respect to horizontal, providing reagent agitation. Optical annunciators proximate the tray indicate respective reagent pack activity under control of a computer which stores information on the contents of each pack at each tray location and correlates it to scheduled reagent use in a medical testing system. The tray is provided with a thermally conductive hinge. The tray with packs is located in an enclosure.

Claims

1. A reagent handling system comprising:

plural reagent packs, each reagent pack comprising

plural chambers formed by opposing and parallel end walls, opposing and parallel side walls substantially orthogonal to said end walls, a floor surface attached to said end and side walls at a lower edge thereof, and at least one intermediate wall substantially parallel to said end walls and disposed between said side walls, wherein said end, side and intermediate walls define a pack upper edge, and

a pair of mixing baffles,

each of said baffles disposed on a respective one of said side walls from said floor surface to said pack upper edge, extending toward an opposite one of said side walls, disposed on a like side of said at least one intermediate wall, and dividing one of said plural chambers into two sub-chambers having substantially equal volume interconnected by a throat region formed between said baffles,

one of said baffles more proximate said first end than another of said baffles, and

a lid having plural penetrable regions formed from at least one film, said lid disposable on said pack upper edge for completely covering said plural chambers, wherein each of said plural penetrable regions is aligned above a respective one of said plural chambers;

a plurality of reagent pack slides, each of said slides for slidably transporting a respective reagent pack disposed thereon within said reagent handling system;

a tray for slidably retaining said plurality of reagent pack slides in a side by side configuration along a first axis; and

an inclination drive and hinge mechanically connected to said tray for selectably inclining said tray about said first axis and said hinge.

2. The reagent handling system according to claim 1, further comprising at least one reagent probe carrier having at least one reagent probe, said at least one probe carrier translatable along said first axis proximate said tray for selectably disposing said at least one reagent probe into a selected one of said reagent packs through one of said plural penetrable regions.

3. The reagent handling system according to claim 1, wherein each of said baffles extends over halfway across said reagent pack between said side walls.

4. The reagent handling system according to claim 1, wherein said floor surface has a plurality of depressed regions, each of said depressed regions associated with a respective one of said plural chambers.

5. The reagent handling system according to claim 4, wherein said plural penetrable regions are each substantially aligned above a respective depressed region when said reagent pack is inclined about said first axis and hinge in an aspirate position.

6. The reagent handling system according to claim 2, wherein said at least one reagent probe carrier further comprises drive means for translating said at least one reagent probe along an axis orthogonal to said first axis and substantially parallel to said reagent pack side walls for selectably disposing said at least one reagent probe into a selected one of said chambers.

7. The reagent handling system according to claim 1, further comprising a cooling means in communication with said tray through said hinge to implement a tray cold plate for cooling reagent packs disposed thereon.