• Umbilical artery catheters have an established place in neonatal intensive care. A double stopcock technique is described for sampling blood from umbilical catheters. This method improves accuracy in blood withdrawal, avoids contamination of samples, and reduces blood loss to a minimum.
(Am J Dis Child 130:1322-1323, 1976)
Philip AGS. Double Stopcock Technique for Blood Sampling From Umbilical Artery Catheters. Am J Dis Child. 1976;130(12):1322-1323. doi:10.1001/archpedi.1976.02120130028005