Capillary fill test device

• US 7,305,896 B2
• Filed: 08/31/2004
• Issued: 12/11/2007
• Est. Priority Date: 09/01/2003
• Status: Active Grant

• Current Assignee: Inverness Medical Switzerland GmbH (Abbott Laboratories Incorporated)
• Original Assignee: Inverness Medical Switzerland GmbH (Abbott Laboratories Incorporated)
• Inventors: Howell, Steven, Troke, James
• Primary Examiner(s): NOLAND, THOMAS
• Application Number:
  US10/930,717
• Publication Number:
  US 20050229722A1
• Time in Patent Office: 1,197 Days
• Field of Search: 7386401-86402, 738/647.2, 422/100, 422102-103, 422/947
• US Class Current: 73/864.02
• CPC Class Codes: A61B 5/150022 for capillary blood or interstitial fluid
• CPC Class Codes: A61B 5/150343 Collection vessels for collecting blood samples from the skin surface, e.g. test tubes, cuvettes sampling from within body cavities A61B5/150015, A61B5/150045
• CPC Class Codes: G01N 1/12 Dippers; Dredgers

Abstract

A device for receiving a sample of liquid, such as a sample of bodily liquid which is to be subjected to further analysis, may include a body having at least a major surface and a minor surface. A sample-receiving chamber may be located in the body and may have an inlet end which opens into the major and minor surfaces of the body. A conduit may be located in the body, extending from the outlet end of the chamber, and may be arranged so as to allow the liquid to pass from the outlet end into the conduit by capillary action.

Claims

1. A device for receiving a sample of liquid, comprising:

a body comprising opposed first and second major external surfaces each defining a periphery, and a peripheral wall joining the peripheries of the major surfaces;

a conduit extending from an outlet of a sample-receiving recess into an interior of the body between the first and second major surfaces, the conduit being arranged so as to allow the liquid to pass from the outlet into the conduit by capillary action, and the conduit defining a conduit axis that runs along its length; and

the sample-receiving recess located in the body adjacent to the periphery of the first major surface of the body, the recess having a lower surface and an inlet, the lower surface being disposed on an opposite side of the conduit axis from the first major surface, being substantially parallel to the first major surface and being outwardly exposed along an axis perpendicular to the conduit axis, the inlet being defined in part by the peripheral wall of the first major surface, the outlet being spaced apart from the peripheral wall of the first major surface within the body, and a width of the recess decreasing from the inlet to the outlet, a maximum width of the conduit no greater than a minimum width of the recess.

2. A device as claimed in claim 1, wherein the body is a generally rectilinear strip, or is wedge- or disc-shaped.

3. A device as claimed in claim 2, wherein the peripheral wall is an end or side wall of the body and one of the major surfaces is a top surface of the body.

4. A device as claimed in claim 1, wherein the body is generally cylindrical.

5. A device as claimed in claim 4, wherein the peripheral wall is an end wall and the first and second major surfaces are respective halves of an outer surface of a cylinder.

6. A device as claimed in claim 1, wherein the sample-receiving recess tapers in at least one dimension from the inlet to the outlet.

7. A device as claimed in claim 6, wherein the sample-receiving recess is generally V- or U-shaped.

8. A device as claimed in claim 6, wherein the sample-receiving recess tapers continuously from the inlet end to the outlet end.

9. A device as claimed in claim 6, wherein the sample-receiving recess tapers continuously in two dimensions from the inlet end to the outlet end.

10. A device as claimed in claim 1, wherein the sample-receiving recess and the conduit are coated with a hydrophilic coating, providing a contact angle of 90 degrees or less.