Medical diagnostic test strip with desiccant

• US 5,962,333 A
• Filed: 01/23/1997
• Issued: 10/05/1999
• Est. Priority Date: 01/25/1996
• Status: Expired due to Term

• Current Assignee: Multisorb Technologies Incorporated (FGI Equity LLC)
• Original Assignee: Multisorb Technologies Incorporated (FGI Equity LLC)
• Inventors: Incorvia, Samuel A., McKedy, George E.
• Primary Examiner(s): ALEXANDER, LYLE
• Application Number:
  US08/787,986
• Time in Patent Office: 985 Days
• Field of Search: 422/56, 422/58, 422/61, 422/57, 436/164, 436/169, 436/170
• US Class Current: 436/169
• CPC Class Codes: B01L 2300/0825 Test strips
• CPC Class Codes: B01L 2300/105 using desiccants
• 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 33/525 Multi-layer analytical elements

Abstract

Medical diagnostic test strips having a desiccant deposit applied directly to the test strip. Moisture barrier sheets cover the test strip. Alternatively, the moisture barrier sheets have a desiccant deposit attached to them. Also alternatively, a pouch with a desiccant deposit attached to its inner surface contains the test strip.

Claims

1. A medical diagnostic test strip package comprising:

(a) a medical diagnostic test strip having a top surface, a reagent contained on a portion of said top surface, and a bottom surface; and

(b) a first moisture barrier sheet adhered to said top surface of said medical diagnostic test strip, said first moisture barrier sheet having a desiccant deposit adhered to a portion thereof such that said portion of said first moisture barrier sheet with said desiccant deposit thereon is integrally disposed on said portion of said medical diagnostic test strip containing said reagent.

2. A medical diagnostic test strip package as claimed in claim 1 further comprising a second moisture barrier sheet adhered to said bottom surface of said medical diagnostic test strip.

3. A medical diagnostic test strip package as claimed in claim 1 wherein said desiccant is silica gel.

4. A medical diagnostic test strip package as claimed in claim 1 wherein said desiccant is molecular sieve.

5. A medical diagnostic test strip package as claimed in claim 1 wherein said desiccant is dispersed in a hot melt adhesive.

6. A medical diagnostic test strip package comprising:

(a) a medical diagnostic test strip having

(i) a top surface,

(ii) a reagent contained in a first portion of said top surface,

(iii) a desiccant deposit adhered to a second portion of said top surface, said second portion adjacent to said first portion, and

(iv) a bottom surface; and

(b) a first moisture barrier sheet adhered to said top surface of said medical diagnostic test strip.

7. A medical diagnostic test strip package as claimed in claim 6 further comprising a second moisture barrier sheet adhered to said bottom surface of said medical diagnostic test strip.

8. A medical diagnostic test strip package as claimed in claim 6 wherein said desiccant is silica gel.

9. A medical diagnostic test strip package as claimed in claim 6 wherein said desiccant is molecular sieve.

10. A medical diagnostic test strip package as claimed in claim 6 wherein said desiccant is dispersed in a hot melt adhesive.

11. A medical diagnostic test strip package comprising:

(a) a medical diagnostic test strip having a top surface and a reagent contained in a first portion of said top surface, and

(b) a pouch containing said medical diagnostic test strip, said pouch having an inner surface and a desiccant deposit adhered to a section of said inner surface, wherein said inner surface of said pouch is disposed proximate said top surface of said medical diagnostic test strip such that said desiccant deposit is adjacent to said reagent of said test strip.

12. A medical diagnostic test strip package as claimed in claims 11 wherein said desiccant is silica gel.

13. A medical diagnostic test strip package as claimed in claim 11 wherein said desiccant is molecular sieve.

14. A medical diagnostic test strip package as claimed in claim 11 wherein said desiccant is dispersed in a hot melt adhesive.

15. A method of preventing water absorption by a medical diagnostic test strip having a top surface, a bottom surface, and a portion of said top surface containing a reagent, said method comprising the steps of:

(a) covering said top surface with a first moisture barrier sheet;

(b) covering said bottom surface with a second moisture barrier sheet; and

(c) integrally disposing a desiccant deposit in proximity to said portion of said top surface of said medical diagnostic test strip containing the reagent.