Cited by 64Analytical Chemistry and SensorsElectrochemical sensors and biosensorsNeuroscience and Neural Engineering

Catheter-type sensor for potentiometric monitoring of oxygen, pH and carbon dioxide

Meruva, Ravi K., Meyerhoff, Mark E.·1998·Biosensors and Bioelectronics

Abstract

The fabrication and analytical performance of a catheter-type electrode suitable for potentiometric monitoring of PO2, pH and PCO2 in flowing blood is described. The catheter electrode is based on impregnating a single segment of dual-lumen gas permeable silicone rubber tubing with the proton ionophore tridodecylamine to impart H+ permselectivity to both inner and outer walls of the tubing. One lumen is filled with an unbuffered bicarbonate solution and the other lumen is filled with a strong buffer. By inserting Ag/AgCl reference electrode wires in each lumen and a cobalt electrode in the buffered lumen, simultaneous potentiometric detection of PO2, pH and PCO2 is achieved. The response of cobalt electrode to PO2 arises from a steady-state mixed potential owing to slow oxidation of cobalt and simultaneous reduction of oxygen on the surface of the cobalt electrode. The response towards PCO2 is completely analogous to the response mechanism of a conventional Severinghaus PCO2 sensor (i.e., change in pH of the bicarbonate solution). Continuous measurements of PO2, pH and PCO2 during 4-5 h blood pump studies using the catheter electrodes correlate well with conventional bench-top blood gas analyzer (PO2: r2 = 0.992; pH: r2 = 0.940; PCO2: r2 = 0.993.

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Crossref · 10.1016/s0956-5663(97)00097-3

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Authors
Meruva, R. K., & Meyerhoff, M. E.
Affiliations
University of Michigan (US)
Corresponding author
Meyerhoff, Mark E.
Venue
Biosensors and Bioelectronics
Publisher
Elsevier BV
Published
1998-02
Volume
13
Issue
2
Pages
201-212
ISSN
0956-5663 (ISSN-L)
OpenAlex
W2010718741
Cited by
64
References
19
Citations by year
2026: 2 · 2024: 1 · 2023: 1 · 2021: 4 · 2020: 2 · 2019: 4 · 2018: 1 · 2017: 6 · 2016: 2 · 2015: 3 · 2014: 2 · 2013: 2 · 2012: 1
FWCI
2.06
Type
journal article
Language
en
Open access
closed
Locations
  • Biosensors and Bioelectronics (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5r01gm028882-20)
  • National Institute of General Medical Sciences (GM 28882)
Topics
  • Physical Sciences › Chemical Engineering › Bioengineering › Analytical Chemistry and Sensors
  • Physical Sciences › Engineering › Electrical and Electronic Engineering › Electrochemical sensors and biosensors
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neural Engineering
Keywords
oxygen partial pressure, blood pH, partial pressure of CO2, cobalt electrodes, mixed potential, blood pump, blood gas analysis
MeSH terms
Animals, Blood Gas Analysis, Carbon Dioxide, Catheterization, Humans, Hydrogen-Ion Concentration, Oxygen, Biosensing Techniques

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