Test cartridge holder for blood samples

• US 20040166590A1
• Filed: 02/20/2003
• Published: 08/26/2004
• Est. Priority Date: 02/20/2003
• Status: Active Grant

• Current Assignee: Medtronic Incorporated (Medtronic Plc)
• Original Assignee: Medtronic Incorporated (Medtronic Plc)
• Inventors: Green, Michael M., Wallace, Brent E., Zillmann, William D., Nippoldt, Douglas D., Rejent, Jeff N.
• Granted Patent: US 7,294,312 B2
• Time in Patent Office: Days
• US Class Current: 436/180
• CPC Class Codes: B01L 2200/026 Fluid interfacing between devices or objects, e.g. connectors, inlet details
• CPC Class Codes: B01L 2300/0654 Lenses; Optical fibres
• CPC Class Codes: B01L 3/0293 for liquids
• CPC Class Codes: B01L 3/508 rigid containers not provided for above
• CPC Class Codes: B01L 9/00 Supporting devices; Holding devices
• CPC Class Codes: Y10T 436/25 including sample preparation
• CPC Class Codes: Y10T 436/25625 Dilution
• CPC Class Codes: Y10T 436/2575 Volumetric liquid transfer

Abstract

Improved methods and apparatus that make more accurate and reduces risk of filling reaction chambers of cartridge cells with blood samples to conduct blood coagulation tests of the type employing the plunger technique are disclosed. A cartridge holder is provided that secures a test cartridge in a fixed upright position and deflects the plunger flag of each cartridge cell to enable manual insertion of a blood dispenser deeply into the reaction chamber to fill the reaction chamber and avoid contamination of surfaces of the cartridge outside the reaction chamber. Preferably, the cartridge holder provides illumination of the reaction chamber during filling, so that the user can judge when the reaction chamber is properly filled with blood dispensed from the blood dispenser. The cartridge holder may incorporate image magnification to facilitate viewing of the reaction chamber as it is filled.

Claims

1. A cartridge holder for facilitating filling of at least one cartridge cell of a test cartridge with a blood sample dispensed from a blood sample dispenser through an upper end opening of a reaction chamber of the cartridge cell for conducting a blood coagulation test, the cartridge cell being of the type employing a plunger that is lifted during mixture of the blood sample with a reagent by engagement of a lift mechanism with a plunger upper end that extends from the cartridge cell, the cartridge holder further comprising:

a cartridge holder frame having a test cartridge receptacle that receives and supports the test cartridge in an upright position so that blood sample can be dispensed into the reaction chamber of the cartridge cell; and

a plunger upper end deflector extending from the cartridge holder frame that deflects the plunger upper end toward a side of the upper end opening as the test cartridge is inserted into the test cartridge receptacle to enable the insertion of the blood dispenser through the upper end opening and into the reaction chamber of the cartridge cell.

2. The cartridge holder of claim 1, wherein:

the cartridge holder frame comprises a lower base and a rear frame configured to provide the test cartridge receptacle that receives and supports the test cartridge in the upright position; and

the plunger upper end deflector comprises a deflecting arm that extends from the rear frame over the base to engage and deflect the plunger upper end.

3. The cartridge holder of claim 2, wherein the rear frame comprises a light emitter that illuminates the reaction chamber of a cartridge cell disposed in the cartridge receptacle.

4. The cartridge holder of claim 3, further comprising an optical lens supported by the cartridge holder frame and disposed with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

5. The cartridge holder of claim 1, wherein the rear frame comprises a light emitter that illuminates the reaction chamber of a cartridge cell disposed in the cartridge receptacle.

6. The cartridge holder of claim 5, further comprising an optical lens supported by the cartridge holder frame and disposed with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

7. The cartridge holder of claim 1, further comprising an optical lens supported by the cartridge holder frame and disposed with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

8. A cartridge holder for facilitating filling of at least one cartridge cell of a test cartridge having at least two elongated cartridge cells arranged side-by-side with a blood sample dispensed from a blood sample dispenser through an upper end opening of a reaction chamber of each cartridge cell for conducting a blood coagulation test, the cartridge cell being of the type employing a plunger in each cartridge cell that is lifted during mixture of the blood sample with a reagent by engagement of a lift mechanism with a plunger upper end that extends from the cartridge cell, the cartridge holder further comprising:

a cartridge holder frame having a test cartridge receptacle that receives and supports the test cartridge in an upright position so that blood sample can be dispensed into the reaction chamber of at least one cartridge cell; and

a plunger upper end deflector extending from the cartridge holder frame that deflects the plunger upper end of the plunger toward a side of the upper end opening as the test cartridge is inserted into the test cartridge receptacle to enable the insertion of the blood sample dispenser through the upper end opening and into the reaction chamber of the cartridge cell.

9. The cartridge holder of claim 8, wherein:

the cartridge holder frame comprises a lower base and a rear frame configured to provide the test cartridge receptacle that receives and supports the test cartridge in the upright position; and

the plunger upper end deflector comprises a first deflecting arm that extends from the rear frame over the base to engage and deflect the plunger upper end of a first plunger in a first cartridge cell in a first direction and a second deflecting arm that extends from the rear frame over the base to engage and deflect the plunger upper end of a second plunger in a second cartridge cell in a second direction.

10. The cartridge holder of claim 9, wherein the rear frame comprises a light emitter that illuminates the reaction chambers of the cartridge cells disposed in the cartridge receptacle.

11. The cartridge holder of claim 10, further comprising an optical lens supported by the cartridge holder frame and disposed with respect to the cartridge receptacle to magnify the images of the reaction chambers of the cartridge cells viewed through the optical lens.

12. The cartridge holder of claim 10, further comprising an elongated optical lens supported by the cartridge holder frame and disposed to extend across the cartridge receptacle to magnify the images of the reaction chambers of the cartridge cells viewed through the elongated optical lens.

13. The cartridge holder of claim 10, further comprising a plurality of elongated optical lenses supported by the cartridge holder frame, each elongated optical lens disposed to extend along the length of a cartridge cell in the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the elongated optical lens.

14. The cartridge holder of claim 8, wherein the rear frame comprises a light emitter that illuminates the reaction chamber of a cartridge cell disposed in the cartridge receptacle.

15. The cartridge holder of claim 14, further comprising an optical lens supported by the cartridge holder frame and disposed with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

16. The cartridge holder of claim 14, further comprising an elongated optical lens supported by the cartridge holder frame and disposed to extend across the cartridge receptacle to magnify the images of the reaction chambers of the cartridge cells viewed through the elongated optical lens.

17. The cartridge holder of claim 14, further comprising a plurality of elongated optical lenses supported by the cartridge holder frame, each elongated optical lens disposed to extend along the length of a cartridge cell in the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the elongated optical lens.

18. The cartridge holder of claim 8, further comprising an optical lens supported by the cartridge holder frame and disposed with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

19. The cartridge holder of claim 8, further comprising an elongated optical lens supported by the cartridge holder frame and disposed to extend across the cartridge receptacle to magnify the images of the reaction chambers of the cartridge cells viewed through the elongated optical lens.

20. The cartridge holder of claim 8, further comprising a plurality of elongated optical lenses supported by the cartridge holder frame, each elongated optical lens disposed to extend along the length of a cartridge cell in the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the elongated optical lens.

21. A method of filling a reaction chamber of at least one cartridge cell of a test cartridge with a blood sample through an upper end opening of the reaction chamber for conducting a blood coagulation test, the cartridge cell being of the type employing a plunger that is lifted during mixture of the blood sample with a reagent by engagement of a lift mechanism with a plunger upper end that extends from the cartridge cell, the cartridge holder further comprising:

inserting the test cartridge into a test cartridge receptacle of a cartridge holder frame that receives and supports the test cartridge in an upright position and has a plunger upper end deflector extending from the cartridge holder frame that deflects the plunger upper end toward a side of the upper end opening as the test cartridge is inserted into the test cartridge receptacle;

inserting a blood dispenser into the upper end opening and into the reaction chamber of the cartridge cell; and

dispensing the blood sample into the reaction chamber of the cartridge cell.

22. The method of claim 21, wherein:

the cartridge holder frame comprises a lower base and a rear frame configured to provide the test cartridge receptacle that receives and supports the test cartridge in the upright position; and

the plunger upper end deflector comprises a deflecting arm that extends from the rear frame over the base to engage and deflect the plunger upper end.

23. The method of claim 22, further comprising emitting light from a light emitter in the rear frame to illuminate the reaction chamber of a cartridge cell disposed in the cartridge receptacle.

24. The method of claim 23, further comprising disposing an optical lens with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

25. The method of claim 21, further comprising emitting light from a light emitter in the rear frame to illuminate the reaction chamber of a cartridge cell disposed in the cartridge receptacle.

26. The method of claim 25, further comprising disposing an optical lens with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.

27. The method of claim 21, further comprising disposing an optical lens with respect to the cartridge receptacle to magnify the image of the reaction chamber of the cartridge cell viewed through the optical lens.