Blood sample collection and test device

• US 5,207,984 A
• Filed: 03/11/1991
• Issued: 05/04/1993
• Est. Priority Date: 03/11/1991
• Status: Expired due to Term

• Current Assignee: Miles, Inc. (Bayer AG)
• Original Assignee: Miles, Inc. (Bayer AG)
• Inventors: Kheiri, Mohammad A.
• Primary Examiner(s): Housel, James C.
• Assistant Examiner(s): WALLENHORST, MAUREEN
• Application Number:
  US07/667,047
• Time in Patent Office: 785 Days
• Field of Search: 422/55, 422/56, 422/57, 422/58, 436/164, 436/165, 436/169, 435/805, 435/970, 356/244, 128/760, 128/767, 118/31.5
• US Class Current: 422/408
• CPC Class Codes: B01L 2200/027 for microfluidic devices
• CPC Class Codes: B01L 2200/0684 Venting, avoiding backpressure, avoid gas bubbles
• CPC Class Codes: B01L 2300/0681 Filter
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2300/0887 Laminated structure
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: G01N 33/521 Single-layer analytical elements
• CPC Class Codes: G01N 33/525 Multi-layer analytical elements
• CPC Class Codes: Y10S 435/97 Test strip or test slide

Abstract

A test device having a semicrater sample application site attached or associated with a substrate. The semicrater sample application site has walls of nonuniform height surrounding the area designed to receive the application of sample. In particular, the walls of the semicrater on one side are higher than the walls of the semicrater on the opposite side. This facilitates the application of a small amount of sample directly onto the desired sample application site.

Claims

1. A test device consisting essentially of:

(a) an elongated strip,

(b) a sample delivery means, disposed on a surface of said strip, wherein said sample delivery means has an open, circular bowl shaped configuration with an open bottom and with walls extending vertically from said surface of said strip and wherein the walls forming a portion of said bowl shaped configuration of said sample delivery means are lower than the walls of an opposite portion of said bowl shaped configuration of said sample delivery means, and

(c) a reagent pad secured to the strip and positioned beneath the open bottom of the circular bowl shaped configuration of the sample delivery means.

2. The test device of claim 1 wherein the strip and sample delivery means constitute one molded piece.

3. The test device of claim 1 wherein the walls of said sample delivery means partially shield the reagent pad from ambient light.

4. The test device of claim 1 wherein the elongated strip is rectangular in shape and wherein the sample delivery means is located at one end of said strip.