Abstract
In the newborn infant sampling of arterial blood is usually performed from the umbilical or temporal artery. Both techniques have been employed in our laboratory, the latter with approximately 90% success after the age of 36 hours. However, the introduction of an umbilical catheter may be impossible after the early hours of life and the rare occurrence of pallor of one leg requires the catheter's immediate removal. Sampling from the temporal artery is difficult in infants with scalp edema, which is often present in the first hours after birth. To the best of our knowledge, sampling from the radial artery has been performed in children and adults but never in newborn infants.
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