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

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      Abstract

      Abstract. Summary: 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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      Affiliations
      [ 1 ]University Hospital, Angers, France
      Author notes
      Prof. Pierre Abraham, MD, PhD, Physiology, University Hospital, Rue Larrey, 49933 Angers, France, E-mail Piabraham@ 123456chu-angers.fr
      Journal
      vas
      VASA
      Hogrefe AG, Bern
      0301-1526
      1664-2872
      2015
      : 44
      : 5
      : 355-362
      vas_44_5_355 10.1024/0301-1526/a000454
      Product
      Self URI (journal page): https://econtent.hogrefe.com/loi/vas
      Categories
      Original communication

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