PEDIATRICS Vol. 58 No. 2 August 1976, pp. 299-301
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Reliability of Transcutaneous Po2 With Roche Oxygen Monitor 5300 at 44 C in Newborn Infants With RDS

Diego Mieth M.D.1, Jean L. Micheli M.D.1, Gabriel Duc M.D.1, and S. Ferdico 1

1 Divisions of Neonatology, Departments of Pediatrics and Obstetrics, University of Zurich, Haldenbachstrasse 22, 8006 Zurich, Switzerland

Since the publication of our letter,1 further data have been assembled with the Roche Oxygen Monitor 5300. Our earlier investigations and those reported by others2,3 have shown that the poor correlation between arterial Po2 and cutaneous Po2 is obtained in patients with RDS, if this type of skin electrode4 is warmed to 42 C. Since these results were possibly due to an insufficient local arterialization of the skin, tests were repeated at a sensor core temperature of 44 C.