A Modified Doppler Flow Detector Probe—An Aid to Percutaneous Radial Arterial Cannulation in Infants and Small Children

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Abstract
Cannulation of the radial artery has become routine for monitoring blood pressure and obtaining blood samples during major surgical procedures and intensive care. This paper describes a technique developed that has increased the success rate of percutaneous cannulation of the radial artery in infants and small children, and thus reduced the need for arterial cutdowns. Chances for accurate location of the radial artery in the small child by palpation vary widely, according to the individuals doing the locating. The technique described above would largely eliminate this variation, since the intensity of the Doppler signal used for locating the vessel may be adjusted by the operator. This makes it possible for the vessel to be more easily located for cannulation, and thus reduces the need for cutdowns.

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