Analytical tool

• US 7,955,554 B2
• Filed: 08/12/2009
• Issued: 06/07/2011
• Est. Priority Date: 10/25/2002
• Status: Active Grant

• Current Assignee: ARKRAY, Inc
• Original Assignee: ARKRAY, Inc
• Inventors: Morita, Yoshimitsu, Kusaka, Yasuhide, Sato, Yoshiharu
• Primary Examiner(s): Noguerola; Alex
• Application Number:
  US12/540,073
• Publication Number:
  US 20090304550A1
• Time in Patent Office: 664 Days
• Field of Search: 20440301-40315, 422 55- 58, 422/99, 422/100, 422/401, 422/408, 422/412, 422/503, 422/507
• US Class Current: 422/50
• CPC Class Codes: B01L 2200/0684 Venting, avoiding backpressure, avoid gas bubbles
• CPC Class Codes: B01L 2300/0645 Electrodes
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2400/0688 surface tension valves, capillary stop, capillary break
• CPC Class Codes: B01L 3/502715 characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
• 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 27/3272 Test elements therefor, i.e. disposable laminated substrates with electrodes, reagent and channels optical biosensors G01N33/52

Abstract

The present invention relates to an analytical tool (1) comprising a substrate (10), a capillary (13) which is formed on the substrate (10) and into which a sample liquid is to be loaded by movement of the sample liquid in the capillary. The substrate (10) is provided with a liquid movement preventer for preventing the sample liquid loaded into the capillary (13) from moving further. Preferably, the liquid movement preventer includes a stepped portion (18B) projecting from the substrate or a recess provided at the substrate.

Claims

1. An analytical tool comprising:

a substrate; and

a cover stacked on the substrate; and

a capillary which is formed between the substrate and the cover, and into which a sample liquid is to be loaded by movement of the sample liquid in the capillary;

wherein the substrate is provided with a liquid movement preventer for preventing the sample liquid loaded into the capillary from moving further,

wherein the liquid movement preventer includes a recess provided in the substrate and having a bottom, and

wherein the cover is formed with an air vent for discharging air from the capillary in moving the sample liquid in the capillary, the air vent extending through the cover.

2. The analytical tool according to claim 1,

wherein the air vent is arranged coaxially or generally coaxially with the recess in a thickness direction of the substrate.

3. An analytical tool comprising:

a substrate;

a cover stacked on the substrate; and

an unforked capillary which is formed between the substrate and the cover, and into which a sample liquid is to be loaded by movement of the sample liquid in the capillary;

wherein the substrate is provided with a liquid movement preventer for preventing the sample liquid loaded into the capillary from moving further,

wherein the liquid movement preventer includes a recess provided in the substrate,

wherein the cover is formed with an air vent for discharging air from the capillary in moving the sample liquid in the capillary, the air vent extending through the cover, and

wherein, as viewed in a thickness direction of the substrate, a most upstream point of the recess in a flow direction of the sample liquid is located on a same line or almost same line as a most upstream point of the air vent in the flow direction of the same liquid.