Catheter transducer for in vivo measurements

• US 3,259,124 A
• Filed: 07/19/1963
• Issued: 07/05/1966
• Est. Priority Date: 07/19/1963
• Status: Expired due to Term

• Current Assignee: Boyd W. Coon, Douglas R. Hillier
• Original Assignee: Boyd W. Coon, Douglas R. Hillier
• Inventors: Hillier, Douglas R., Coon, Boyd W.
• Application Number:
  US04/296,250
• Time in Patent Office: 1,082 Days
• US Class Current: 600/348
• 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

Claims

1. IN A DEVICE FOR MAKING IN VIVO MEASUREMENTS OF A CONSITUTENT IN A BODY FLUID OR THE LIKE, COMBINATION OF:

A CATHETER;

ELECTROCHEMICAL SENSOR MEANS IN ONE END OF SAID CATHETER, SAID SENSOR MEANS INCLUDING A PAIR OF ELECTRODES ONE OF SAID ELECTRODES SURROUNDING AND BEING CONCENTRICALLY MOUNTED WITH RESPECT TO THE OTHER ELECTRODE AND SPACED THEREFROM, AN ELECTROLYTE JOINING SAID ELECTRODES AND A MEMBRANE PERMEABLE TO THE CONSTITUENT BEING MEASURED SEPARATING SAID ELECTRODES AND ELECTROLYTE FROM THE BODY FLUID;

FIRST AND SECOND CONDUCTORS ELECTRICALLY CONNECTED TO SAID ELECTRODES AND EXTENDING THROUGH SAID CATHETER TO THE OTHER END THEREOF, A NONCONDUCTIVE TUBE SURROUNDING SAID FIRST CONDUCTOR, SAID SECOND CONDUCTOR COMPRISING A WIRE SPIRALLY WOUND OVER SAID NONCONDUCTING TUBE TO FORM A COIL, AND EACH CONVOLUTION OF SAID COIL ABUTTING THE NEXT ADJACENT CONVOLUTION THEREOF TO THEREBY PROVIDE HIGHLY FLEXIBLE ELECTRICAL SHIELDING FOR SAID FIRST CONDUCTOR;

AND MEANS AT SAID OTHER END OF SAID CATHETER CONNECTED TO SAID FIRST AND SECOND CONDUCTORS FOR CONNECTING SAID CONDUCATORS TO AN EXTERNAL CIRCUIT.