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Comparison of two devices for measuring exercise transcutaneous oxygen pressures in patients with claudication

Abstract : Background: We aimed at estimating the agreement between the Medicap® (photo-optical) and Radiometer® (electro-chemical) sensors during exercise transcutaneous oxygen pressure (tcpO2) tests. Our hypothesis was that although absolute starting values (tcpO2rest: mean over 2 minutes) might be different, tcpO2-changes over time and the minimal value of the decrease from rest of oxygen pressure (DROPmin) results at exercise shall be concordant between the two systems. Patients and methods: Forty seven patients with arterial claudication (65 + / - 7 years) performed a treadmill test with 5 probes each of the electro-chemical and photo-optical devices simultaneously, one of each system on the chest, on each buttock and on each calf. Results: Seventeen Medicap® probes disconnected during the tests. tcpO2rest and DROPmin values were higher with Medicap® than with Radiometer®, by 13.7 + / - 17.1 mm Hg and 3.4 + / - 11.7 mm Hg, respectively. Despite the differences in absolute starting values, changes over time were similar between the two systems. The concordance between the two systems was approximately 70 % for classification of test results from DROPmin. Conclusions: Photo-optical sensors are promising alternatives to electro-chemical sensors for exercise oximetry, provided that miniaturisation and weight reduction of the new sensors are possible.
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Contributeur : Nathalie Renois <>
Soumis le : mardi 13 octobre 2015 - 10:49:24
Dernière modification le : mardi 6 octobre 2020 - 14:32:02

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Marie Urban, Alban Fouasson-Chailloux, Isabelle Signolet, Christophe Colas-Ribas, Mathieu Feuilloy, et al.. Comparison of two devices for measuring exercise transcutaneous oxygen pressures in patients with claudication. VASA, Hogrefe, 2015, 44 (5), pp.355-362. ⟨10.1024/0301-1526/a000454⟩. ⟨hal-01214837⟩



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