Radial artery cannulation in neonates: a new method.

In neonates arterial cannulation is a relatively difficult procedure without the aid of transillumination. This paper discusses a simple method to make the radial artery prominent in neonates. The principle used is displacement of perivascular interstitial fluid to make the course of the artery visible so that, under direct vision, cannulation of the artery becomes almost as easy as a venous cannulation.