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Construction and performance of a new catheter-tip oxygen electrode

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Abstract

A membrane-covered catheter-tip oxygen-electrode system is described, which gives a linear response in the Po2 range of 0–350 mm Hg. The system is highly stable, free from drift and mechanically safe for application in man. This is accomplished by using a screw cap for fastening the membrane holder, thus preventing the loss of parts and making the electrolyte chamber really fluidtight. Insulation of the platinum wire with glass precludes the possibility of fluid-bridge contact with the silver anode beyond the measuring site at the tip.

Sommaire

Est décrit un système d'électrode à oxygène munie d'un embout cathéter et recouverte d'une, membrane, donnant une réponse linéaire dans la gammeP o2 de O à 350 mm Hg. Ce système est extrêmement stable, exempt de dérive et du point de vue mécanique il ne présente aucun danger d'application sur l'homme. Une telle sûreté d'application est obteneue en utilisant un capuchon à vis pour fixer le support de membrane, permettant ainsi d'éviter la perte de pièces et assurant l'étanchéité complète de la chambre électrolytique. Grâce au verre isolante le fil de platine, toute possibilité de contact entre le fluide et l'anode d'argent au-delà du niveau de mesure de l'embout est exclue.

Zusammenfassung

Beschrieben wird ein membranumhulltes Sauerstoffelektrodensystem mit Katheterspitze, das imP o2-Bereich von 0–350 mm Hg eine Linearreaktion aufweist. Das System ist mechanisch sehr stabil, frei von Nullpunktverschiebung und kann gefahrlos im Menschen angewendet werden. Dies wird durch Verwendung einer Schraubenkappe zur Befestigung des Membranhalters ermöglicht, was das Verlorengehen von Bestandteilen ausschaltet und die Elektrolytenzelle wirklich flüssigkeitsdicht macht. Glasisolierung des Platindrahtes schließt die Möglichkeit eines Flüssigkeitsbrückenkontaktes mit der Silberanode außerhalb der Meßstelle an der Spitze aus.

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Authors and Affiliations

  1. Department of Paediatrics, Erasmus University & University Hospital/Sophia Children's Hospital and Neonatal Unit, Rotterdam, The Netherlands

    T. C. Jansen, H. N. Lafeber, H. K. A. Visser, G. Kwant, B. Oeseburg & W. G. Zijlstra

  2. Laboratory of Chemical Physiology, University of Groningen, The Netherlands

    T. C. Jansen, H. N. Lafeber, H. K. A. Visser, G. Kwant, B. Oeseburg & W. G. Zijlstra

Authors
  1. T. C. Jansen
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  2. H. N. Lafeber
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  3. H. K. A. Visser
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  4. G. Kwant
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  5. B. Oeseburg
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  6. W. G. Zijlstra
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Jansen, T.C., Lafeber, H.N., Visser, H.K.A. et al. Construction and performance of a new catheter-tip oxygen electrode. Med. Biol. Eng. Comput. 16, 274–277 (1978). https://doi.org/10.1007/BF02442427

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  • DOI: https://doi.org/10.1007/BF02442427

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