Sampling system for sample fluid

• US 20070299365A1
• Filed: 05/09/2007
• Published: 12/27/2007
• Est. Priority Date: 11/09/2004
• Status: Abandoned Application

• Current Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Original Assignee: Roche Diabetes Care Inc. (Roche Holding AG)
• Inventors: Sarofim, Emad, Calasso, Irio
• Application Number:
  US11/746,386
• Publication Number:
  US 20070299365A1
• Time in Patent Office: Days
• US Class Current: 600/583
• 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 5/150358 Strips for collecting blood, e.g. absorbent optical reagent test strips G01N21/8483; chemical reagent test strips G01N33/4875, G01N33/52
• CPC Class Codes: A61B 5/150419 comprising means for capillary action
• CPC Class Codes: A61B 5/150435 Specific design of proximal end
• CPC Class Codes: A61B 5/150503 Single-ended needles hollow piercing element tip design A61B5/150396, needle sets for catheters A61M25/06, needles for bringing media into the body A61M5/32
• CPC Class Codes: A61B 5/15105 Purely manual piercing, i.e. the user pierces the skin without the assistance of any driving means or driving devices
• CPC Class Codes: A61B 5/15142 Devices intended for single use, i.e. disposable

Abstract

The invention generally relates to a sampling system for sample liquid having a support, a lancing element arranged thereon and a semi-open channel for the capillary transport of the sample liquid from the lancing element to a collecting site on the support. A receiving structure is provided for receiving excess sample liquid escaping from the side of the channel.

Claims

1. A microsampler for sampling a body liquid, the microsampler comprising:

a support;

a lancing element arranged on the support;

a semi-open channel for the capillary transport of the sample liquid from the lancing element to a collecting site;

a receiving structure arranged on the support for retaining excess body liquid escaping from the side of the channel.

2. The microsampler of claim 1, wherein the receiving structure is effective as a capillary for the body liquid in an entry area on the channel side.

3. The microsampler of claim 1, wherein the capillary transport capacity for the body liquid is larger in the direction of the channel than in the branch direction of the receiving structure.

4. The microsampler of claim 1, wherein the receiving structure is arranged on the support at a section of the channel downstream of the lancing element and upstream of the collecting site with respect to the flow direction.

5. The microsampler of claim 1, wherein the lancing element sticks out as a tip on a shaft member of the support and that the receiving structure is arranged in the area of the shaft member.

6. The microsampler of claim 1, wherein the receiving structure is formed by a cover element arranged on the support while keeping free a capillary gap towards the channel.

7. The microsampler of claim 6, wherein the capillary gap has a lower capillary attraction for the body liquid than the adjoining section of channel.

8. The microsampler of claim 1, wherein the receiving structure is formed by at least one semi-open overflow capillary which is arranged next to the side of the channel on the support.

9. The microsampler of claim 8, wherein two overflow capillaries are arranged symmetrically to one another on both sides of the channel.

10. The microsampler of claim 8, wherein at least one overflow capillary can have at least one branch.

11. The microsampler of claim 10, wherein the at least one branch has a smaller flow cross-section than the adjoining overflow capillary.

12. The microsampler of claim 8, wherein the channel is separated from the at least one overflow capillary by a side wall, where excess body liquid overflows into the overflow capillary over the side wall.

13. The microsampler of claim 12, the channel is fluidically connected to the at least one overflow capillary by a capillary branch.

14. The microsampler of claim 1, wherein the receiving structure at the same time forms a reservoir for refilling the channel.

15. The microsampler of claim 1, wherein the lancing element is formed on a flat shaped part being the support and that the channel has a linear grooved shape.

16. The microsampler of claim 1, wherein the support and the lancing element are formed as one piece from a flat material by photochemical mask etching.