Liquid supply device and analytical test device

• US 6,017,494 A
• Filed: 04/24/1998
• Issued: 01/25/2000
• Est. Priority Date: 09/30/1996
• Status: Expired due to Term

• Current Assignee: Fujirebio Inc. (H.U. Group Holdings, Inc.)
• Original Assignee: Fujirebio Inc. (H.U. Group Holdings, Inc.)
• Inventors: Fujiwara, Yuko, Gotanda, Mitsushi, Hasegawa, Akira, Ashihara, Yoshihiro
• Primary Examiner(s): Warden, Sr., Robert J.
• Assistant Examiner(s): MCNEIL, JENNIFER C
• Application Number:
  US09/065,725
• Time in Patent Office: 641 Days
• Field of Search: 422/56, 422/58, 422/61, 436/164, 436/169
• US Class Current: 422/412
• CPC Class Codes: B01L 2300/0672 Integrated piercing tool
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2400/0406 capillary forces
• CPC Class Codes: B01L 2400/0633 with moving parts
• CPC Class Codes: B01L 2400/0683 mechanically breaking a wall or membrane within a channel or chamber
• CPC Class Codes: B01L 3/5023 with a sample being transported to, and subsequently stored in an absorbent for analysis
• CPC Class Codes: G01N 33/54388 based on lateral flow
• CPC Class Codes: G01N 33/558 using diffusion or migration of antigen or antibody immunochromatographic test strips G01N33/54387

Abstract

A liquid supply device for transporting a liquid to a predetermined portion includes a liquid container for holding a liquid therein, which has an opening, a sealing sheet member which is impermeable but rupturable and seals the opening of the container, and an absorbent material which is capable of transporting the liquid by capillary action, the absorbent material being disposed on the sealing sheet member, out of contact with the liquid when the sealing sheet member is not ruptured, while when the sealing sheet member is ruptured and the absorbent material is brought into contact with the liquid, part of the absorbent material being continuously held within the liquid and transporting the liquid to the predetermined position. An analytical test device using the above liquid supply device is provided, which may be used, for instance, immunoassay.

Claims

1. A liquid supply device for transporting a liquid to a predetermined portion, comprising:

a liquid container for holding a liquid therein, which comprises an opening,

a sealing sheet member which is impermeable but rupturable and seals said opening of said container, and

an absorbent material which is capable of transporting said liquid by capillary action, said absorbent material being disposed on said sealing sheet member, out of contact with said liquid when said sealing sheet member is not ruptured, while when said sealing sheet member is ruptured and said absorbent material is brought into contact with said liquid, part of said absorbent material being continuously held within said liquid and transporting said liquid to said predetermined position.

2. The liquid supply device as claimed in claim 1, further comprising a rupturing member which is capable of engaging with said absorbent material, rupturing said sealing sheet member and holding part of said absorbent material within said liquid.

3. The liquid supply device as claimed in claim 2, further comprising a deformable supporting member for supporting said rupturing member, said deformable supporting member comprising a convex portion which can be irreversibly inverted into a concave form when depressed, thereby holding said rupturing member in such a position that said sealing sheet member is ruptured and part of said absorbent material is continuously held within said liquid.

4. The liquid supply device as claimed in claim 3, wherein said deformable supporting member comprises at least one groove-shaped portion for facilitating the irreversible inverting of said convex portion into said concave form and maintaining said concave form when depressed.

5. An analytical test device comprising:

a liquid supply device for transporting liquid to a predetermined portion, comprising;

a) a liquid container for holding a liquid therein, which comprises an opening,

b) a sealing sheet member which is impermeable but rupturable and seals said opening of said liquid container, and

c) an analytical test strip comprising an absorbent material, which is capable of transporting said liquid by capillary action, said analytical test strip being disposed on said sealing sheet member, out of contact with said liquid when said sealing sheet member is not ruptured, while when said sealing sheet member is ruptured and said analytical test strip is brought into contact with said liquid, part of said test strip being continuously held within said liquid and transporting said liquid to said predetermined position,

a test sample application portion to which a test sample which may contain a test substance to be detected is applied so that said test sample is brought into contact with said liquid which is transported by said analytical test strip, and

a detecting portion for detecting a predetermined condition of said test sample in contact with one or more reagents applied to said analytical test strip at a predetermined portion upstream of said detecting portion and carried thereto by said liquid.

6. The analytical test device as claimed in claim 5, wherein said liquid supply device further comprises a rupturing member which is capable of engaging with said analytical test strip, rupturing said sealing sheet member and holding part of said analytical test strip within said liquid.

7. The analytical test device as claimed in claim 5, wherein said liquid supply device further comprises a deformable supporting member for supporting said rupturing member, said deformable supporting member comprising a convex portion which can be irreversibly inverted into a concave form when depressed, thereby holding said rupturing member in such a position that said sealing sheet member is ruptured and part of said analytical test strip is continuously held within said liquid.

8. The analytical test device as claimed in claim 7, wherein said deformable supporting member in said liquid supply device comprises at least one groove-shaped portion for facilitating the irreversible inverting of said convex portion into said concave form and maintaining said concave form when depressed.

9. The analytical test device as claimed in claim 5, wherein said one or more reagents are applied to said absorbent material at said test sample application portion.

10. The analytical test device as claimed in claim 5, wherein said one or more reagents are contained in said liquid in said liquid container.

11. The analytical test device as claimed in claim 5, further comprising a vaporization portion, which is disposed downstream of said detecting portion with respect to the flow of said liquid through said analytical test strip, wherein the area of said vaporization portion is larger than the total of the areas of said test sample application portion and said detecting portion.

12. The analytical test device as claimed in claim 5, wherein said analytical test strip comprises a plurality of absorbent portions, each of which is capable of transporting said liquid by capillary action.

13. The analytical test device as claimed in claim 12, wherein said analytical test strip comprises:

a first absorbent portion comprising a substrate for a specific enzyme, part of said first absorbent portion being disposed on said sealing sheet member,

a second absorbent portion on which a first material which specifically binds with said test substance contained in said test sample is immobilized, said second absorbent portion being disposed upstream of said test sample application portion, and connected to said first absorbent portion, without being brought into contact with said liquid even when said first absorbent portion is brought into contact with said developing liquid, and

a third absorbent portion comprising a second material which is labeled with said specific enzyme and binds with said test substance, said third absorbent portion being disposed under said detecting portion, and connected to said second absorbent portion.