Solid state transcutaneous blood gas sensors
First Claim
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1. A solid state transcutaneous oxygen sensor comprising:
- (a) an electrically insulating substrate;
(b) a first electrode comprising a noble metal on said substrate of (a);
(c) a second electrode comprising a silver/silver halide reference electrode on said substrate of (a);
(d) an insulating dielectric layer on said components (a), (b) and (c) characterized in that at least a portion of component (b) and component (c) remains exposed; and
(e) an oxygen permeable polymeric membrane containing a bound liquid electrolyte over at least said exposed portion of said first and said second electrodes;
(f) a polymeric oxygen permeable, liquid impermeable, biocompatible membrane coating over said oxygen permeable polymeric membrane containing a bound liquid electrolyte;
further characterized in that said exposed portions of said first and second electrodes have well-defined surface areas.
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Abstract
Disclosed is a solid state oxygen sensor utilizing a noble metal first electrode and a silver/silver halide reference electrode and an oxygen permeable polymeric membrane electrolyte. Also disclosed is a method of producing said sensor and a method of using said sensor.
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Citations
15 Claims
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1. A solid state transcutaneous oxygen sensor comprising:
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(a) an electrically insulating substrate; (b) a first electrode comprising a noble metal on said substrate of (a); (c) a second electrode comprising a silver/silver halide reference electrode on said substrate of (a); (d) an insulating dielectric layer on said components (a), (b) and (c) characterized in that at least a portion of component (b) and component (c) remains exposed; and (e) an oxygen permeable polymeric membrane containing a bound liquid electrolyte over at least said exposed portion of said first and said second electrodes; (f) a polymeric oxygen permeable, liquid impermeable, biocompatible membrane coating over said oxygen permeable polymeric membrane containing a bound liquid electrolyte; further characterized in that said exposed portions of said first and second electrodes have well-defined surface areas.
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- 2. A solid state oxygen sensor as claimed in claim 2 wherein said second electrode is selected from the group consisting of silver/silver chloride, silver/silver bromide, silver/silver fluoride, and silver/silver iodide.
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15. A method for non-invasively measuring the blood oxygen partial pressure (PO2) of a patient, which method comprises applying a polarization potential to a solid state transcutaneous oxygen sensor comprising:
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(a) an electrically insulating substrate; (b) a first electrode comprising a noble metal on said substrate of (a); (c) a second electrode comprising a silver/silver halide reference electrode on said substrate of (a); (d) an insulating dielectric layer on said components (a), (b) and (c) characterized in that at least a portion of component (b) and component (c) remains exposed; (e) an oxygen permeable polymeric membrane containing a bound liquid electrolyte over at least said exposed portion of said first and said second electrodes; (f) a polymeric oxygen permeable, liquid impermeable, bicompatible membrane coating over said oxygen permeable polymeric membrane containing a bound liquid electrolyte; and (g) further characterized in that said exposed portions of said first and second electrodes have well-defined surface areas; then contacting the patient'"'"'s skin with the sensor and measuring the current flow response.
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Specification