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SOME CHARACTERISTICS OF TRANSCUTANEOUSLY MONITORED OXYGEN PARTIAL PRESSURE IN NORMAL NEWBORNS
Author(s) -
LÖFGREN O.,
JACOBSON L.
Publication year - 1979
Publication title -
acta pædiatrica
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.772
H-Index - 115
eISSN - 1651-2227
pISSN - 0803-5253
DOI - 10.1111/j.1651-2227.1979.tb08213.x
Subject(s) - medicine , crying , laryngospasm , anesthesia , breathing , psychiatry , airway
The transcutaneous oxygen partial pressure (Ptc O2 ) was monitored in 50 healthy, normally and spontaneously delivered newborns. Measurements were performed during the first to fourth day of life. The electrode temperature was 44.5°C. The mean Ptc O2 level recorded during about 45 min was 9.2 kPa (S.D. 1.4) recorded from the minute‐to‐minute values. The Ptc O2 level normally oscillated to a certain extent and the oscillations were closely related to the breathing pattern of the patient. When the patient fell asleep during measurement, the normal oscillating pattern was replaced by a “silent pattern”. During crying, the Ptc O2 level showed four main reaction patterns. A decrease in the Ptc O2 level could be observed during breast‐feeding. One child, recently fed, vomited a small amount of breast milk after a short period of crying and apparently had a laryngospasm, shown by a sudden drop in the Ptc O2 level without any other signs of discomfort. The study shows that Ptc O2 (and thus also Pa O2 very sensitively reacts to changes in activity. This implies that earlier used methods for determination of Pa O2 might give values that are not representative for the steady state as the sampling method per se might influence the recorded P O2 value.