Device for the transcutaneous measurement of the partial oxygen pressure in blood

• US 4,324,257 A
• Filed: 02/25/1980
• Issued: 04/13/1982
• Est. Priority Date: 02/20/1978
• Status: Expired due to Term

• Current Assignee: Honeywell BV (Honeywell International Inc.)
• Original Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Inventors: Albarda, Scato, Kuijpers, Martinus H.
• Primary Examiner(s): Kamm, William E.
• Application Number:
  US06/124,405
• Time in Patent Office: 778 Days
• Field of Search: 128/635, 128/639, 204/195 B, 204/195 P
• US Class Current: 600/357
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1477 non-invasive

Abstract

A device for the transcutaneous measurement of the partial oxygen pressure in blood, comprising a measuring head which includes a measuring cell of the Clark-type which is surrounded by one or more annular shielding cells of the Clark-type in order to eliminate any oxygen which laterally penetrates from the ambient air.

Claims

1. A device for the transcutaneous measurement of partial oxygen pressure in the blood of humans or animals, comprising:

a measuring head;

a measuring cell contained in a space within said measuring head which includes a first measuring electrode, a first reference electrode, and an electrolyte solution surrounding said first electrodes;

oxygen permeable diaphragm means disposed between said first electrodes and the skin which function to contain the solution within said space; and

a essentially annular shielding cell which surrounds the measuring cell and includes an essentially annular second measuring electrode and an essentially annular second reference electrode;

said second electrodes being situated in a space within said measuring head which is similar to the space containing the measuring cell.

2. A device as claimed in claim 1 wherein the measuring cell and the shielding cell are contained within a single common space in the measuring head, which space is filled with said electrolyte solution.

3. A device as claimed in claim 1 or 2 further comprising a second essentially annular shielding cell disposed between said measuring cell and said first shielding cell.

4. A device as claimed in claim 3 wherein the first shielding cell and the second shielding cell comprise a single common electrode.

5. A device as claimed in claim 1 further comprising an ammeter connected to measure current flow in the measuring cell.

6. A device as claimed in claim 3 further comprising a first ammeter connected to measure current in the measuring cell and a second ammeter connected to measure current in the second shielding cell.