The Effect of Method of Radial Artery Cannulation on Postcannulation Blood Flow and Thrombus Formation

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Abstract
Percutaneous radial artery cannulation is performed to permit continuous monitoring of systemic arterial blood pressure and to facilitate repeated sampling of arterial blood. Two methods of cannulation are used: transfixing, in which the posterior wall of the artery is deliberately punctured; and direct threading, in which the posterior wall is not punctured. Whether the method of cannulation influences postcannulation blood flow and thrombus formation was studied. Although a difference in thrombus formation was not demonstrated comparing the 2 techniques, the low overall incidence of thrombosis means such a possibility should not be excluded. The commonly practiced technique of transfixing apparently does not carry an appreciable increased risk to the patient.

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