Devices and methods for body fluid sampling and analysis
Described here are meters and methods for sampling, transporting, and/or analyzing a fluid sample. The meters may include a meter housing and a cartridge. In some instances, the meter may include a tower which may engage one or more portions of a cartridge. The meter housing may include an imaging system, which may or may not be included in the tower. The cartridge may include one or more sampling arrangements, which may be configured to collect a fluid sample from a sampling site. A sampling arrangement may include a skin-penetration member, a hub, and a quantification member.
1. An integrated body fluid sampling meter comprising:
a meter housing;
a cartridge insertable into the meter housing and comprising a plurality of sampling arrangements, wherein the plurality of sampling arrangements includes a first sampling arrangement moveable between a pre-fired position and a rest position; and
an imaging assembly in the meter housing, the imaging assembly configured to image a first portion of a reagent pad of the first sampling arrangement and a second, different portion of the reagent pad of the first sampling arrangement as the first sampling arrangement moves between the pre-fired position and the rest position.
2. The meter of claim 1 , wherein the imaging assembly is configured to image a viewing area including, during a first time period, the first portion of the reagent pad and, during a second, different time period, the second, different portion of the reagent pad.
3. The meter of claim 2 , wherein the reagent pad has a midline and the viewing area is on a first side of the midline when the first sampling arrangement is in the rest position.
4. The meter of claim 3 , wherein the viewing area is configured to move toward the midline of the reagent pad when the first sampling arrangement moves from the rest position toward the pre-fired position.
5. The meter of claim 2 , wherein the viewing area is configured to move from a first side of the midline of the reagent pad to a second side of the reagent pad as the first sampling arrangement moves.
6. The meter of claim 2 , wherein the first sampling arrangement further comprises a cap positioned over at least a portion of the reagent pad, and wherein the imaging assembly is further configured to image at least a portion of the cap.
7. The meter of claim 6 , wherein at least one of the portion of the cap and a material on the reagent pad is used as a reference standard.
8. The meter of claim 1 , wherein the imaging assembly comprises a first linear detector array configured to image a first linear viewing area.
9. The meter of claim 8 , wherein the first linear viewing area is parallel to an axis of rotation of the first sampling arrangement.
10. The meter of claim 8 , wherein the imaging assembly comprises a second linear detector array in the meter housing, wherein the second linear detector array is configured to image a second linear viewing area.
11. The meter of claim 10 , wherein the first and second linear viewing areas are parallel.
12. The meter of claim 11 , wherein the reagent pad has a midline, and the first and second linear viewing areas are positioned on either side of the midline of the reagent pad when the first sampling arrangement is in the rest position.
13. The meter of claim 10 , wherein the first and second linear viewing areas are perpendicular.
14. The meter of claim 1 , wherein the imaging assembly comprises a two-dimensional detector array configured to image a viewing area comprising a plurality of rows and a plurality of columns.
15. The meter of claim 1 further comprising a tower in the meter housing, and a rotation element for rotating the cartridge around the tower.
16. The meter of claim 15 , wherein the imaging assembly is housed within the tower.
17. The meter of claim 1 , wherein the first sampling arrangement is configured to rotate around a pivot point when it moves between the pre-fired position and the rest position.
18. The meter of claim 1 , wherein the first sampling arrangement further comprises a skin penetration member comprising a lumen, wherein the lumen is in fluid communication with the reagent pad, and the imaging assembly is configured to image a viewing area including the reagent pad.
19. A method of operating a body fluid sampling meter comprising a meter housing and an imaging assembly in the meter housing, the method comprising:
receiving a cartridge in the meter housing, the cartridge comprising a plurality of sampling arrangements, wherein the plurality of sampling arrangements includes a first sampling arrangement that has a pre-fired position and a rest position;
releasing the first sampling arrangement from the pre-fired position; and
imaging a first portion of a reagent pad of the first sampling arrangement and a second, different portion of the reagent pad of the first sampling arrangement as the first sampling arrangement moves from the pre-fired position to the rest position.
20. The method of claim 19 , wherein the reagent pad has a first side and a second side separated by a midline.
21. The method of claim 20 , wherein imaging the first portion of the reagent pad comprises imaging at least a portion of the first side of the reagent pad.
22. The method of claim 21 , wherein the imaging assembly images the first side of the reagent pad when the first sampling arrangement is in the rest position.
23. The method of claim 21 , wherein the portion of the reagent pad imaged moves from the first side of the reagent pad toward the midline of the reagent pad as the first sampling arrangement moves from the rest position toward the pre-fired position.
24. The method of claim 20 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises imaging the midline of the reagent pad when the first sampling arrangement is in the rest position.
25. The method of claim 20 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises imaging the first side of the reagent pad and the second side of the reagent pad.
26. The method of claim 20 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises sequentially imaging the first side of the reagent pad and the second side of the reagent pad.
27. The method of claim 20 , wherein the first sampling arrangement further comprises a cap positioned over at least a portion of the reagent pad, and wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises imaging at least a portion of cap.
28. The method of claim 27 further comprising using at least one of the portion of the cap and a material on the reagent pad as a reference standard.
29. The method of claim 20 , wherein the reagent pad is circular or oval.
30. The method of claim 19 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises imaging the reagent pad as the sampling arrangement moves from the pre-fired position to the rest position.
31. The method of claim 19 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises imaging the reagent pad as the sampling arrangement moves from the rest position toward the pre-fired position.
32. The method of claim 19 , wherein the sampling arrangement rotates around a pivot point when it moves.
33. The method of claim 19 , wherein the sampling arrangement rotates relative to the imaging assembly when it moves.
34. The method of claim 19 , wherein the imaging assembly comprises a linear detector array to image different portions of the sample arrangement.
35. The method of claim 34 , wherein the linear detector array images an area that is parallel to an axis of rotation of the first sampling arrangement.
36. The method of claim 34 , wherein the linear detector array comprises a plurality of pixels, and wherein a maximum number of pixels of the detector array image portions of the reagent pad when the sampling arrangement is in the rest position.
37. The method of claim 34 , wherein the linear detector array comprises a plurality of pixels and the reagent pad has a midline, and wherein a maximum number of pixels of the detector array image the reagent pad when the linear detector array images the midline of the reagent pad.
38. The method of claim 19 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises measuring a first range of wavelengths reflected from the reagent pad and measuring a second different range of wavelengths reflected from the reagent pad.
39. The method of claim 19 , wherein imaging the first portion of the reagent pad and the second, different portion of the reagent pad comprises illuminating the reagent pad with light in a first wavelength range and illuminating the reagent pad with light in a second wavelength range.
40. The method of claim 39 , wherein reagent pad is illuminated with light in the first wavelength range and in the second wavelength range sequentially.