Serum abstraction device

• US 4,151,832 A
• Filed: 03/21/1977
• Issued: 05/01/1979
• Est. Priority Date: 03/19/1976
• Status: Expired due to Term

• Current Assignee: Geerd Hamer
• Original Assignee: Geerd Hamer
• Inventors: Hamer, Geerd
• Primary Examiner(s): Marantz, Sidney
• Application Number:
  US05/779,495
• Time in Patent Office: 771 Days
• Field of Search: 128/2 F, 128/278, 128/DIG. 5, 23/259, 23/292, 210/DIG. 23, 422/56, 422/58, 422/68
• US Class Current: 600/578
• CPC Class Codes: A61B 10/0045 Devices for taking samples of body liquids devices for taking blood samples A61B5/15
• CPC Class Codes: A61B 2010/0006 involving a colour change
• CPC Class Codes: G01N 1/14 Suction devices, e.g. pumps; Ejector devices

Abstract

A vacuum housing connected to a vacuum generator has one open end covered by a fine sieve to provide a serum collection space. A test strip of blotting paper is flush against an intermediate air permeable membrane which is in turn flush against a support sieve.

Claims

1. A device for the extraction of tissue serum comprising a vacuum housing having an open end,

a fine sieve covering said open end and positioned to directly contact said tissue in use to define a serum collecting space in said vacuum housing behind said sieve,

a test strip in said serum collecting space a short distance from said fine sieve.

a support sieve for said test strip on one side of said test strip, and

means for connecting said vacuum housing to a vacuum generator, whereby said serum is drawn through said sieve into said collecting space.

2. The device as defined in claim 1 wherein said test strip is introduceable in an essentially airtight manner into said serum collecting space.

3. The device as defined in claim 1 wherein said vacuum housing has the form of a tube.

4. The device as defined in claim 1 wherein said test strip is located directly behind said sieve.

5. The device as defined in claim 1 wherein said support sieve for said test strip is in flush contact with one side of said test strip.

6. The device as defined in claim 1 wherein said sieve is concave.

7. The device as defined in claim 1 comprising a membrane permeable only to air located between said test strip and said support sieve.