Disposable test device with sample volume measurement and mixing methods

• US 20050220668A1
• Filed: 04/06/2005
• Published: 10/06/2005
• Est. Priority Date: 04/06/2004
• Status: Abandoned Application

• Current Assignee: Bio/Data Corp.
• Original Assignee: Bio/Data Corp.
• Inventors: Coville, William E.
• Application Number:
  US11/100,277
• Publication Number:
  US 20050220668A1
• Time in Patent Office: Days
• US Class Current: 422/57
• CPC Class Codes: B01F 25/431 Straight mixing tubes with baffles or obstructions that do not cause substantial pressure drop; Baffles therefor
• CPC Class Codes: B01F 25/4317 Profiled elements, e.g. profiled blades, bars, pillars, columns or chevrons
• CPC Class Codes: B01F 25/433 Mixing tubes wherein the shape of the tube influences the mixing, e.g. mixing tubes with varying cross-section or provided with inwardly extending profiles
• CPC Class Codes: B01F 25/4337 Mixers with a diverging-converging cross-section
• CPC Class Codes: B01F 25/4338 Mixers with a succession of converging-diverging cross-sections, i.e. undulating cross-section
• CPC Class Codes: B01F 33/30 Micromixers
• CPC Class Codes: B01F 33/452 using independent floating stirring elements
• CPC Class Codes: B01F 33/81 Combinations of similar mixers, e.g. with rotary stirring devices in two or more receptacles
• CPC Class Codes: B01F 33/811 in two or more consecutive, i.e. successive, mixing receptacles or being consecutively arranged
• CPC Class Codes: B01F 33/813 mixing simultaneously in two or more mixing receptacles
• CPC Class Codes: B01L 2200/0605 Metering of fluids
• CPC Class Codes: B01L 2200/0684 Venting, avoiding backpressure, avoid gas bubbles
• CPC Class Codes: B01L 2200/16 Reagents, handling or storing thereof
• CPC Class Codes: B01L 2300/0681 Filter
• CPC Class Codes: B01L 2300/0809 rectangular shaped
• CPC Class Codes: B01L 2300/0816 Cards, e.g. flat sample carriers usually with flow in two horizontal directions
• CPC Class Codes: B01L 2300/0864 comprising only one inlet and multiple receiving wells, e.g. for separation, splitting
• CPC Class Codes: B01L 2300/087 Multiple sequential chambers
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 2400/0487 fluid pressure, pneumatics
• CPC Class Codes: B01L 2400/0694 : vents used to stop and induce flow, backpressure valves
• CPC Class Codes: B01L 2400/086 : using baffles or other fixed flow obstructions
• CPC Class Codes: B01L 3/502723 : characterised by venting arrangements
• CPC Class Codes: B01L 3/502738 : characterised by integrated valves microvalves F16K99/0001
• CPC Class Codes: B01L 3/502746 : characterised by the means for controlling flow resistance, e.g. flow controllers, baffles B01L3/502738 takes precedence
• CPC Class Codes: G01N 2035/00148 : Test cards, e.g. Biomerieux or McDonnel multiwell test cards
• CPC Class Codes: G01N 21/01 : Arrangements or apparatus for facilitating the optical investigation

Abstract

A sample testing device has a volume chamber that separates a known volume of a sample from a remaining sample through the introduction of a fluid between the known volume of the sample and the remaining sample wherein the introduction of the fluid is through a fluid inlet port that has an open and closed state. The device further comprises a passage including a mixing chamber connected to the volume chamber and adapted to mix the sample; a test chamber connected to the mixing chamber and adapted to perform a test on the sample; and a vent port that has an open and a closed state. When the fluid inlet and vent ports are in the open state, the introduction of a pressurized fluid into the fluid inlet port drives the sample from the volume chamber, into one or more mixing chambers, and then into the test chamber.

Claims

1. A sample testing device comprising:

a volume chamber that separates a sample of known volume from a remaining sample through the introduction of a fluid in an entire sample containing both the sample of known volume and the remaining sample;

wherein the introduction of the fluid is through a fluid inlet port that has an open and closed state; and

a passage comprising;

a mixing chamber connected to the volume chamber and adapted to mix the sample;

a test chamber connected to the mixing chamber and adapted to perform a test on the sample;

a first vent port that has an open and a closed state;

wherein when the fluid inlet and first vent ports are in the open state, the introduction of a pressurized fluid into the fluid inlet port drives the sample from the volume chamber, into the mixing chamber, and then into the test chamber.

2. The sample testing device of claim 1 wherein the mixing chamber contains a reagent that mixed with the sample.

3. The sample testing device of claim 1 wherein the fluid introduced is air.

4. The sample testing device of claim 1 wherein the fluid introduced is a liquid that does not react with the sample.

5. The sample testing device of claim 1 further comprising:

at least one additional passage, each comprising;

a mixing chamber connected to the volume chamber and adapted to mix the sample with a reagent contained in the mixing chamber;

a test chamber connected to the mixing chamber and adapted to perform a test on the sample;

a second vent port that has an open and a closed state;

wherein when the fluid inlet is open and either or both of the first and second vent ports are in the open state, the introduction of a pressurized fluid into the fluid inlet port drives the sample from the volume chamber, into and through the passage or at least one additional passage depending on whether the first or second vent port is also in the open state.

6. The sample testing device of claim 1 wherein the passage further comprises:

at least one additional mixing chamber connected to the mixing chamber and adapted to further mix the sample with a reagent contained in the at least one additional mixing chamber.

7. The sample testing device of claim 1 further comprising:

an open well connected to either or all of the volume chamber, the mixing chamber, and/or the test chamber that eliminates air bubbles from the sample.

8. The sample testing device of claim 1 further comprising:

an opening for removing the sample from the sample testing device.

9. The sample testing device of claim 1 further comprising at least one restriction in the mixing chamber that mixes the sample.

10. The sample testing device of claim 9 further comprising a first restriction at an entrance to the mixing chamber and a second restriction at an exit from the mixing chamber.

11. The sample testing device of claim 9 wherein the at least one restriction is a pin.

12. The sample testing device of claim 1 further comprising grooves in the mixing chamber that mix the sample.

13. The sample testing device of claim 1 further comprising steps in the mixing chamber that mix the sample.

14. The sample testing device of claim 1 further comprising a magnetic mixer in the mixing chamber that mix the sample.

15. The sample testing device of claim 14 wherein the cross-sectional area of the magnetic mixer is about 75% of the cross-sectional area of the mixing chamber.

16. The sample testing device of claim 15 wherein the movement of the magnetic mixer is induced by an electromagnet outside of the mixing chamber.

17. The sample testing device of claim 16 wherein the electromagnet is an inductor.

18. The sample testing device of claim 14 wherein the movement of the magnetic mixer is induced by a moving magnet outside the mixing chamber.

19. The sample testing device of claim 1 wherein the mixing chamber can be selectively sealed to prevent fluid flow from an entrance and/or exit therefrom.

20. The sample testing device of claim 1 wherein when the fluid inlet port is in an open state and the vent port is in an open state, the introduction of a pressurized fluid into the vent port drives the sample from the test chamber, into the mixing chamber, and then into the volume chamber.

21. The sample testing device of claim 1 further comprising:

an optical detector that senses the presence of the sample in the test chamber.

22. The sample testing device of claim 21 wherein when optical detector senses the presence of the sample in the test chamber, the introduction of the pressurized fluid to the fluid inlet port is interrupted.

23. The sample testing device of claim 21 wherein the optical detector measures the volume of the sample.

24. The sample testing device of claim 21 wherein the optical detector detects the sample in the passage.

25. The sample testing device of claim 1 further comprising:

an electrical testing device that measures electrical properties of a sample in the test chamber.

26. The sample testing device of claim 1 further comprising an optical testing device.

27. The sample testing device of claim 1 wherein the test chamber has a convex shape that collects bubbles in the sample.

28. The sample testing device of claim 1 wherein the sample is discharged from the device,

29. The sample testing device of claim 1 further comprising:

a reservoir connected to the volume chamber; and

a membrane that filters specimen in the reservoir and allows sample to pass therethrough, the membrane located between the reservoir and the volume chamber.

30. The sample testing device of claim 1 further comprising an analyzing device that performs direct analysis of the sample.

31. The sample testing device of claim 1 further comprising an analyzing device that performs indirect analysis of the sample.

32. The sample testing device of claim 1 wherein the test performed on the sample is an immunoassay.

33. The sample testing device of claim 1 wherein the test performed on the sample is a colorimetric assay.

34. The sample testing device of claim 1 wherein the test performed on the sample is a turbometric assay.

35. The sample testing device of claim 1 wherein the test performed on the sample is an optical density assay.

36. The sample testing device of claim 1 wherein the sample is blood.

37. The sample testing device of claim 1 wherein the sample is plasma.

38. The sample testing device of claim 1 wherein the sample is serum.

39. The sample testing device of claim 1 wherein the sample is saliva.

40. The sample testing device of claim 1 wherein the sample is urine.

41. The sample testing device of claim 1 wherein the sample is spinal fluid.

42. The sample testing device of claim 1 wherein the sample is cell culture or fermentation sample.

43. A method for volume measurement, mixing, and testing a sample comprising the following steps:

separating an exact volume of a sample from a larger sample through the introduction of a fluid between the sample and the larger sample;

mixing the sample with a reagent;

testing the sample; and

driving the sample through each step of the method.

44. A method of claim 43 wherein the sample is driven in two directions through a passage.