Sensor-dispensing device and mechanism for extracting sensor

• US 8,142,733 B2
• Filed: 10/19/2005
• Issued: 03/27/2012
• Est. Priority Date: 10/21/2004
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Creaven, John P.
• Primary Examiner(s): Sakelaris, Sally
• Application Number:
  US11/791,460
• Publication Number:
  US 20080021296A1
• Time in Patent Office: 2,351 Days
• Field of Search: None
• US Class Current: 422/401
• CPC Class Codes: G01N 33/48757 Test elements dispensed from a stack

Abstract

A cartridge assembly is adapted to be used in a sensor-dispensing device. The cartridge assembly comprises an end cap, a disposable cartridge and a sealing mechanism. The end cap includes one opening. The disposable cartridge comprises an outer and inner cartridge. The inner cartridge contains sensors arranged in a stack therein. Each of the sensors carries a reagent sufficient to produce a signal in response to the analyte concentration in a fluid. The outer cartridge forms an opening of sufficient dimensions to permit a sensor to pass through the opening. The outer cartridge includes a holding mechanism that holds at least one of the sensors in place during movement of the inner cartridge. The sealing mechanism is adapted to form a substantially moisture-tight seal.

Claims

1. A sensor-dispensing device adapted to determine an analyte concentration of a fluid, the device comprising:

a cartridge assembly including an outer cartridge and an inner cartridge, the inner cartridge containing a plurality of sensors arranged in a stack therein, the outer cartridge including a holding mechanism configured to engage at least one of the sensors to hold the at least one of the sensors in place during movement of the inner cartridge with respect to the outer cartridge; and

a gripping mechanism external to the cartridge assembly and moveable between a first position and a second position, the gripping mechanism including an engaging end with a slot configured to engage and grip the at least one of the sensors such that a portion of the at least one of the sensors is inside the slot in response to the gripping mechanism being in the second position, the engaging end of the gripping mechanism being configured to cause the inner cartridge to move with respect to the outer cartridge in response to the gripping mechanism being moved toward the second position, the gripping mechanism being configured to extend into an opening in the outer cartridge and to pull the at least one of the sensors from the stack through the opening in the outer cartridge, the opening being of sufficient dimensions to permit the at least one of the sensors and the gripping mechanism to pass therethrough.

2. The sensor-dispensing device of claim 1, wherein the cartridge assembly further comprises an end cap and a sealing mechanism, the sealing mechanism being configured to form a substantially moisture-tight seal so as to protect the sensors within the inner cartridge from atmospheric moisture.

3. The sensor-dispensing device of claim 2, wherein the movement of the gripping mechanism from the first position to the second position causes the gripping mechanism to break the seal and then to travel to an extent sufficient to permit a sensor to be urged to a position to contact the gripping mechanism and wherein the movement of the gripping mechanism from the second position to the first position pulls the sensor through the opening.

4. The sensor-dispensing device of claim 3, wherein the gripping mechanism contacts both the sealing mechanism and an uppermost sensor in the stack when traveling from the first position to the second position.

5. The sensor-dispensing device of claim 4, further comprising a slider coupled to the gripping mechanism such that the gripping mechanism is configured to be manually urged between the first and second positions by a user via the slider.

6. The sensor-dispensing device of claim 2, wherein the sealing mechanism is attached to the end cap.

7. The sensor-dispensing device of claim 6, wherein the sealing mechanism includes a seal door and a linkage mechanism, the linkage mechanism assists in facilitating the movement of the seal door.

8. The sensor-dispensing device of claim 1, wherein the dimensions of the opening permit only a single sensor at a time to be pulled therethrough.

9. The sensor-dispensing device of claim 1, wherein the outer cartridge includes exactly one opening.

10. The sensor-dispensing device of claim 1, wherein the holding mechanism holds the uppermost sensor in place while the inner cartridge is moved relative to the outer cartridge by the gripping mechanism.

11. The sensor-dispensing device of claim 1, wherein the gripping mechanism contains electrical contacts within the slot that are configured to electrically couple the at least one of the sensors in the slot to electronics of the sensor-dispensing device.

17. The sensor-dispensing device of claim 1, wherein the holding mechanism includes a lip, the lip being configured to engage an end of the at least one of the sensors to hold the at least one of the sensors in place during the movement of the inner cartridge with respect to the outer cartridge.

18. The sensor-dispensing device of claim 1, wherein the movement of the inner cartridge with respect to the outer cartridge is lateral.

19. The sensor-dispensing device of claim 18, wherein the lateral movement of the inner cartridge with respect to the outer cartridge and the movement of the gripping mechanism are in the same directions.

21. The sensor-dispensing device of claim 1, further comprising a mechanical mechanism positioned within the inner cartridge and adjacent to the stack such that the mechanical mechanism exerts pressure on the stack to cause the holding mechanism to engage the at least one of the sensors.

22. The sensor-dispensing device of claim 21, wherein the mechanical mechanism includes a pressure plate and at least one biasing member.

23. The sensor-dispensing device of claim 7, wherein the gripping mechanism is configured to engage the linkage mechanism to cause the sealing mechanism to move from a sealed position to an open position.

24. The sensor-dispensing device of claim 2, wherein as the gripping mechanism moves from the first position to the second position, the gripping mechanism initially enters the end cap, then moves through the opening in the outer cartridge, and then engages the inner cartridge.

25. The sensor-dispensing device of claim 24, wherein the gripping mechanism is at least partially positioned in an internal channel within a device housing coupled to the end cap in response to the gripping mechanism being in the first position.

12. A cartridge assembly being adapted to be used in a sensor-dispensing device, the sensor-dispensing device being adapted to determine the analyte concentration of a fluid, the cartridge assembly comprising:

an end cap;

a disposable cartridge comprising an outer cartridge and an inner cartridge, the inner cartridge containing a plurality of sensors arranged in a stack therein, the outer cartridge forming an opening of sufficient dimensions to permit a sensor and a gripping mechanism to pass through the opening, the gripping mechanism being external to the cartridge assembly and being configured to extend into the opening in the outer cartridge, the outer cartridge including a holding mechanism having a lip, the lip being configured to engage an end of at least one of the sensors to hold the at least one of the sensors in place during lateral movement of the inner cartridge with respect to the outer cartridge, the disposable cartridge being removably located within the end cap; and

a sealing mechanism attached within the end cap and configured to engage the disposable cartridge located within the end cap such that the sealing mechanism is adapted to form a substantially moisture-tight seal so as to protect the sensors within the inner cartridge from atmospheric moisture.

13. The cartridge assembly of claim 12, wherein the sealing mechanism includes a seal door and a linkage mechanism, the linkage mechanism assists in facilitating the movement of the seal door.

14. The cartridge assembly of claim 12, wherein the dimensions of the opening permit only a single sensor at a time to be pulled therethrough.

15. The cartridge assembly of claim 12, wherein the outer cartridge includes exactly one opening.

16. The cartridge assembly of claim 12, further comprising a mechanical mechanism positioned within the inner cartridge for positioning the test sensors, one at a time, for removal from the inner cartridge.

20. The cartridge assembly of claim 12, wherein the inner cartridge moves laterally with respect to the outer cartridge when the gripping mechanism is moved through the opening of the outer cartridge.

26. The cartridge assembly of claim 12, wherein the outer cartridge encompasses the inner cartridge.

27. The cartridge assembly of claim 26, wherein the end cap encompasses the outer cartridge.

28. A method of dispensing a test sensor, comprising:

providing a sensor-dispensing device including a cartridge assembly coupled to a device housing including a gripping mechanism external to the cartridge assembly, the cartridge assembly including an outer cartridge and an inner cartridge, the inner cartridge including a plurality of sensors therein;

moving the gripping mechanism from a first position in the device housing towards a second position at least partially within the cartridge assembly, during the moving;

(1) moving an engaging end of the gripping mechanism through an opening in the outer cartridge;

(2) engaging the engaging end of the gripping mechanism with the inner cartridge;

(3) moving the inner cartridge with respect to the outer cartridge; and

(4) gripping one of the plurality of sensors with the gripping mechanism such that a portion of the one of the plurality of sensors is positioned within a slot of the engaging end of the gripping mechanism.

29. The method of claim 28, further comprising, during the moving of the gripping mechanism, engaging the engaging end of the gripping mechanism with a sealing mechanism positioned adjacent to the cartridge assembly and moving the sealing mechanism from a sealing position to an open position.

30. The method of claim 28, further comprising, during the moving of the gripping mechanism, engaging a holding mechanism positioned within the outer cartridge with the one of the plurality of sensors such that the one of the plurality of sensors is held by the holding mechanism with respect to the outer cartridge as the inner cartridge moves with respect to the outer cartridge.

31. The method of claim 28, further comprising retracting the gripping mechanism through the opening in the outer cartridge while the portion of the one of the plurality of sensors remains positioned within the slot of the engaging end of the gripping mechanism.

32. The method of claim 28, wherein the gripping further comprises engaging the one of the plurality of sensors with one or more electrical contacts positioned within the slot such that the one of the plurality of sensors is electrically coupled with electronics of the sensor-dispensing device.

33. The method of claim 28, wherein the cartridge assembly is coupled to the device housing via an end cap, the cartridge assembly being positioned within the end cap.