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The need for close control of oxygenation in the sick newborn infant , particularly when born preterm, is widely recognized. Poor oxygen control has been l inked not only with retrolental fibroplasia but also such conditions äs spastic diplegia and other neurologic defects. Despite the s ignif i cance of these problems, most infants are managed on the basis of intermittent blood samples drawn from indwel l ing aortic catheters. The blood flow in the lower aorta i s clearly past the level of the ductus arteriosus and therefore if a patent ductus exists and has right to left flow, samples obtäined from the lower aorta can be very mis leading regarding the Po2 reaching the brain and eyes. The development of the transcutaneous Po2 electrode has provided an improved method for evaluation of the oxygenation of these infants since the Po« analysis is both continuous and non-invasive. tcPo? monitoring has also provided a technique for the assessment of right ro left shunts through the ductus.

Use of tcPo 2 for Evaluation of Right to Left Shunts in Patent Ductus Arteriosus