Fluid collecting and monitoring device

• US 7,604,775 B2
• Filed: 08/12/2002
• Issued: 10/20/2009
• Est. Priority Date: 08/12/2002
• Status: Active Grant

• Current Assignee: Ascensia Diabetes Care Holdings AG (PHC Holdings Corporation)
• Original Assignee: Bayer Healthcare LLC (Bayer AG)
• Inventors: Van Rensburg, Richard Wilhelm Janse, Pollock, Neil
• Primary Examiner(s): Warden; Jill
• Assistant Examiner(s): JARRETT, LORE RAMILLANO
• Application Number:
  US10/216,597
• Publication Number:
  US 20040028558A1
• Time in Patent Office: 2,626 Days
• Field of Search: 422/57, 422/100, 422/58, 436/180
• US Class Current: 422/408
• CPC Class Codes: A61B 2562/0295 Strip shaped analyte sensors for apparatus classified in A61B5/145 or A61B5/157
• CPC Class Codes: A61B 5/14532 for measuring glucose, e.g. by tissue impedance measurement
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150213 Venting means
• CPC Class Codes: A61B 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: Y10T 436/2575 Volumetric liquid transfer

Abstract

A device that is intended for the sampling of fluids, comprises a base and a lid. Between the base and the lid there is provided an opening and a first open-sided channel extending from the opening to a second open-sided channel for the collection of fluid therein. The depth of the second channel is smaller than that of the first channel.

Claims

1. A device for sampling a fluid comprising:

a base;

a lid;

a fluid-collection point for initially receiving the fluid, the fluid-collection point being positioned between the base and the lid;

a first open-sided channel for the collection of fluid therein, the first open-sided channel extending from the fluid-collection point;

a second open-sided channel extending from the first open-sided channel, the depth of the second open-sided channel being smaller than the depth of the first open-sided channel; and

at least one vent channel positioned adjacent to the first and second open-sided channels, the depth of the at least one vent channel being greater than the depth of the first open-sided channel.

2. The device according to claim 1, further comprising a step between the first and second open-sided channels.

3. The device according to claim 1, further comprising a vent through which air can be removed from the first and the second open-sided channels.

4. The device according to claim 3, wherein the vent is situated beyond the second open-sided channel.

5. The device according to claim 1, wherein the volumetric space within the first open-sided channel is 0.4-1.3 μ

l and the volumetric space within the second open-sided channel is 0.4-1.0 μ

l.

6. The device according to claim 1, wherein the first and second open-sided channels are aligned to form a substantially straight passageway.

7. The device according to claim 1, wherein the lid and base are bonded together to contain the first and second open-sided channels.

8. The device according to claim 1, wherein a surface of the second open-sided channel is coated with a reagent.

9. The device according to claim 8, wherein the lid of the device is translucent or transparent such that a color change in the reagent may be analyzed externally.

10. The device according to claim 8, further comprising a pair of electrodes disposed within the second open-sided channel to assist in measuring a change of current flowing between the pair of the electrodes.

11. A method of collecting a fluid sample, the method comprising the acts of:

providing a device comprising

a base,

a lid,

a fluid-collection point for initially receiving the fluid, the fluid-collection point being positioned between the base and the lid,

a first open-sided channel for the collection of fluid therein, the first open-sided channel extending from the fluid-collection point,

a second open-sided channel extending from the first open-sided channel, the depth of the second open-sided channel being smaller than the depth of the first open-sided channel, and

at least one vent channel positioned adjacent to the first and second open-sided channels, the depth of the at least one vent channel being greater than the depth of the first open-sided channel; and

placing the device adjacent to a fluid drop and allowing capillary action to collect the fluid into the device.

12. The method according to claim 11, wherein the fluid collected in the first open-sided channel is transferred to the second open-sided channel by capillary action.

13. The method according to claim 11, wherein fluid continues to be collected by the first open-sided channel after the transfer to the second open-sided channel has commenced.

14. The method according to claim 11, wherein the fluid is collected from multiple beads of fluids from different surfaces.

15. The method according to claim 11, wherein the device further comprises a step between the first and second open-sided channels.

16. The method according to claim 11, wherein the device further comprises a vent through which air can be removed from the first and the second open-sided channels.

17. The method according to claim 11, wherein the first and second open-sided channels are aligned to form a substantially straight passageway.

18. The method according to claim 11, wherein a surface of the second open-sided channel is coated with a reagent.

19. The method according to claim 11, wherein the device further comprises a pair of electrodes disposed within the second open-sided channel to assist in measuring a change of current flowing between the pair of the electrodes.