Method and apparatus for measuring bioelectronic parameters

• US 3,249,103 A
• Filed: 01/21/1963
• Issued: 05/03/1966
• Est. Priority Date: 01/21/1963
• Status: Expired due to Term

• Current Assignee: Charles F. Woodhouse
• Original Assignee: Charles F. Woodhouse
• Inventors: Woodhouse, Charles F.
• Application Number:
  US04/252,993
• Time in Patent Office: 1,198 Days
• US Class Current: 600/360
• CPC Class Codes: A61B 5/14539 for measuring pH
• CPC Class Codes: A61B 5/14542 for measuring blood gases A61B5/14551 takes precedence
• CPC Class Codes: A61B 5/1473 invasive, e.g. introduced into the body by a catheter A61B5/1482 takes precedence
• CPC Class Codes: A61B 5/1495 Calibrating or testing of in-vivo probes
• CPC Class Codes: A61B 5/6849 in combination with a needle set

Claims

1. THE METHOD OF MEASURING BIOELECTRONIC PARAMETERS IN VIVO, COMPRISNG THE STEPS OF INSERTING A FIRST ELECTRODE INTO ACTUAL PHYSICAL CONTACT WITH BLOOD WITHIN A BLOOD VESSEL, COMPLETING AN ELECTRICAL CIRCUIT BETWEEN SAID FIRST ELECTRODE AND A SECOND ELECTRODE, PLACING SAID SECOND ELECTRODE IN ELECTRICALLY CONDUCTING RELATIONSHIP WITH SAID BLOOD BY DISPOSING AN ELECTROLYTE IN ACTUAL PHYSICAL CONTACT WITH BOTH SAID BODY AND SAID SECOND ELECTRODE, INSULATING SAID SECOND ELECTRODE FROM SAID BLOOD EXCEPT THROUGH SAID ELECTROLYTE, AND MEASURING THE POTENTIAL DIFFERENCE BETWEEN SAID FIRST AND SECOND ELECTRODES, WHEN THERE IS SUBSTANTIALLY NO CURRENT FLOWING IN SAID CIRCUIT.