Electrical connection system for an electrochemical analysis system

• US 8,545,774 B2
• Filed: 06/01/2010
• Issued: 10/01/2013
• Est. Priority Date: 12/15/2004
• Status: Active Grant

• Current Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Original Assignee: Roche Diagnostics Operations Incorporated (Roche Holding AG)
• Inventors: Riebel, Stefan, Augstein, Manfred, Wieder, Herbert, Bainczyk, Gregor, Thoes, Bruno Robert
• Primary Examiner(s): KWAK, DEAN P
• Application Number:
  US12/791,500
• Publication Number:
  US 20100236941A1
• Time in Patent Office: 1,218 Days
• Field of Search: 422/64, 422/68.1, 422/82.02, 422/500, 422/544, 324/71.1
• US Class Current: 422/544
• CPC Class Codes: G01N 33/4875 Details of handling test elements, e.g. dispensing or storage, not specific to a particular test method test-elements per se B01L, automatic analysers G01N35/00, in-vivo analysis on the human body for medical diagnosis A61B
• CPC Class Codes: Y10T 29/49002 Electrical device making

Abstract

An electrical connection system for an analysis system and a method for analysis of a liquid sample on an analytical test element using the described analysis system are disclosed. The analysis system provides an evaluation appliance for evaluation of electrical signals, a test element holder for holding and positioning of an analytical test element in a measurement position, and an electrical contact element which makes electrical contact with an electrical contact surface of an analytical test element to produce an electrical connection between the contact surface and the evaluation appliance. The contact element is moved by means such that contact with the electrical contact surface of the test element is made when the test element holder is in the measurement position.

Claims

1. An analysis system configured to analyze a liquid sample provided on a test element, said system comprising:

an evaluation appliance configured to evaluate electrical signals;

a test element holder configured to hold and move the test element from an initial position to a measurement position within the analysis system; and

an electrical contact element at least partially mounted on the test element holder having at least a portion facing towards and at a distance from a contact surface of the test element when held by the test element holder in the initial position, said electrical contact element being moveably retained by the test element holder in both the initial and measurement positions, wherein the electrical contact element moves relative to the test element holder and into contact with the contact surface of the test element when the test element is moved from the initial position to the measurement position by the test element holder which makes an electrical connection between the contact surface and the evaluation appliance such that the liquid sample provided on the test element is analyzed by the evaluation appliance via electrical signals from the test element.

2. The analysis system of claim 1, further comprising a moving means for moving the electrical contact element, the moving means selected from a contact-pressure element, a slide, and the electrical contact element when the test element is moved to the measurement position.

3. The analysis system of claim 1, wherein the electrical contact element moves relative to the test element holder at substantially right angles to the contact surface.

4. The analysis system of claim 1, wherein the contact element moves towards the contact surface via a rotary movement.

5. The analysis system of claim 1, further comprising a housing, the test element holder and the electrical contact element are provided in said housing, and the test element holder is moveable relative to the housing.

6. The analysis system of claim 5, wherein the contact element is partially fixedly mounted on the housing and is resiliently flexible such that movement of the test element holder relative to the housing from the initial position to the measurement position resiliently deforms the contact element into direct contact with the contact surface.

7. The analysis system of claim 1, further comprising a housing and wherein the test element holder comprising a slide that is moveable between the initial position and an end position within the housing, the end position situated at the measurement position, the slide defines a holding space bounded by a stop and has an inlet opening configured to receive the test element, wherein the electrical contact element is set at a distance from the contact surface of the test element when the test element is inserted in the holding space and the slide is in the initial position, and wherein the electrical contact element is configured to press against the contact surface when the slide is in the end position to make the electrical connection between the contact surface and the evaluation appliance.

8. The analysis system of claim 7, wherein the contact element is at least partially mounted on the slide.

9. The analysis system of claim 7, wherein the electrical contact element is mounted on the slide and recessed relative to the test element in a depression in the holding space when the slide is in the initial position.

10. The analysis system of claim 7, wherein the contact element is partially fixedly mounted on the housing and is resiliently flexible such that movement of the slide from the initial position to the end position resiliently deforms the contact element into direct contact with the contact surface.

11. The analysis system of claim 7, wherein the contact element is resiliently flexible and at one end the contact element contacts an electrical contact in electrical communication with the evaluation appliance when the slide is in the end position, and at another end the contact element resiliently is deformed toward the contact surface when the slide is in the end position by a contact-pressure element fixedly mounted to the housing.

12. The analysis system of claim 7, wherein the contact element is rotatably mounted to the slide, and the contact element is configured to move by an electrical contact in electrical communication with the evaluation appliance, the contact element comprising one end that contacts the electrical contact when the slide is in the end position and wherein contacting causes the other end of the contact element to rotate towards the contact surface.

13. The analysis system of claim 7, wherein the electrical contact element is configured to extend through and is moveably maintained within an opening in the slide, and wherein the system further comprises a contact-pressure element fixedly mounted within the housing and outside the slide, and configured to move the electrical contact element into direct contact with the contact surface of the test element when the test element is moved to the measurement position.

14. The analysis system of claim 7, wherein the electrical contact element is configured to extend through and is moveably maintained within an opening in the slide, wherein the system further comprises a contact-pressure element fixedly mounted within the housing and outside the slide, and wherein the contact-pressure element includes a guide surface configured to displace the electrical contact element into the holding space towards the contact surface as the slide is moved from the initial position to the end position.

15. The analysis system of claim 14, wherein the contact-pressure element comprising an electrically conductive material and is in electrical communication with the evaluation appliance.

16. The analysis system of claim 14, wherein the contact-pressure element comprising an inclined plane which guides the electrical contact element as the slide is moved from the initial position to the end position.

17. The analysis system of claim 1, further comprising a test element magazine including at least two test elements, and a test element removal device configured to remove the test element from the test element magazine and transports the test element to the measurement position in the test element holder.

18. The analysis system of claim 17, further comprising moving means for moving the contact element, and wherein the test element removal device comprising a drive means operatively connected to the moving means.

19. The analysis system of claim 18, wherein the contact element comprises a toggle lever, and the moving means comprises a rod configured to be moveable in a substantially longitudinal direction and the rod end moves the contact element into direct contact with the contact surface of the test element when positioned in the measurement position in the test element holder.

20. The analysis system of claim 1, wherein the evaluation appliance comprises an electrochemical evaluation circuit configured to perform analysis of the liquid sample on the test element based at least partially on the electrical signals transmitted from the test element.

21. The analysis system of claim 1, wherein the test element holder is configured to move the test element automatically.

22. The analysis system of claim 1, wherein the test element holder is configured to move the test element manually.

23. An analysis system configured to analyze a liquid sample provided on a test element, said system comprising:

an evaluation appliance which evaluates electrical signals;

a slide configured to hold the test element in a holding space and the slide is moveable within a housing of the analysis system between an initial position and a measurement position; and

at least one electrical contact element mounted on the slide and arranged such that when the slide is in the initial position and holding the test element in the holding space, the electrical contact element is non-contacting and at a distance from a contact surface of the test element; and

when the slide is moved from the initial position to the measurement position, the electrical contact element is configured to move towards the contact surface and presses against the contact surface in the measurement position, such that electrical connection between the test element and the evaluation appliance is provided.

24. The analysis system of claim 23, wherein the slide is configured to move the test element automatically.

25. The analysis system of claim 23, wherein the slide is configured to move the test element manually.